diff --git a/.secrets.baseline b/.secrets.baseline
index 952441d55..9c8e8b88a 100644
--- a/.secrets.baseline
+++ b/.secrets.baseline
@@ -4,7 +4,7 @@
     "files": "package-lock.json|^.secrets.baseline$",
     "lines": null
   },
-  "generated_at": "2020-10-19T02:55:47Z",
+  "generated_at": "2021-04-09T07:48:36Z",
   "plugins_used": [
     {
       "name": "AWSKeyDetector"
@@ -55,10 +55,17 @@
     }
   ],
   "results": {
+    "backend/src/test-utils/test-env.ts": [
+      {
+        "hashed_secret": "c237a19676ad55d8904be354990dd54f92f9572c",
+        "is_verified": false,
+        "line_number": 4,
+        "type": "Base64 High Entropy String"
+      }
+    ],
     "frontend/.env-example": [
       {
         "hashed_secret": "e5e9fa1ba31ecd1ae84f75caaa474f3a663f05f4",
-        "is_secret": false,
         "is_verified": false,
         "line_number": 5,
         "type": "Basic Auth Credentials"
diff --git a/.travis.yml b/.travis.yml
index 3bafa148e..3ae7b922d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,8 @@ node_js:
 
 services:
   - docker
+  - postgresql
+  - redis-server
 
 cache: npm
 
diff --git a/backend/.eslintrc.js b/backend/.eslintrc.js
index ba6a5fab8..35589cd58 100644
--- a/backend/.eslintrc.js
+++ b/backend/.eslintrc.js
@@ -1,13 +1,14 @@
 module.exports = {
   root: false,
   parser: '@typescript-eslint/parser',
-  plugins: ['@typescript-eslint'],
+  plugins: ['@typescript-eslint', "jest"],
   extends: [
     'eslint:recommended', // Recommended ESLint rules
     'plugin:@typescript-eslint/eslint-recommended', // Disables rules from `eslint:recommended` that are already covered by the TypeScript typechecker
     'plugin:@typescript-eslint/recommended', // Recommended TypeScript rules
     'prettier/@typescript-eslint', // Disables rules from `@typescript-eslint/recommended` that are covered by Prettier
     'plugin:prettier/recommended', // Recommended Prettier rules
+    "plugin:jest/recommended" // Recommended Jest rules
   ],
   parserOptions: {
     sourceType: 'module',
diff --git a/backend/jest.config.js b/backend/jest.config.js
index d6df66493..59a9518ef 100644
--- a/backend/jest.config.js
+++ b/backend/jest.config.js
@@ -1,14 +1,20 @@
 module.exports = {
   roots: ['<rootDir>'],
-  testMatch: ['**/__tests__/**/*.(spec|test).+(ts|tsx|js)'],
+  testMatch: ['**/tests/**/*.(spec|test).+(ts|tsx|js)'],
+  testPathIgnorePatterns: ['<rootDir>/build/', '<rootDir>/node_modules/'],
   moduleNameMapper: {
     '@core/(.*)': '<rootDir>/src/core/$1',
     '@sms/(.*)': '<rootDir>/src/sms/$1',
     '@email/(.*)': '<rootDir>/src/email/$1',
+    '@telegram/(.*)': '<rootDir>/src/telegram/$1',
+    '@test-utils/(.*)': '<rootDir>/src/test-utils/$1',
   },
   transform: {
     '^.+\\.(ts|tsx)$': 'ts-jest',
   },
   testEnvironment: 'node',
-  setupFilesAfterEnv: ['<rootDir>/__tests__/setup.js'],
+  globalSetup: '<rootDir>/src/test-utils/global-setup.ts',
+  globalTeardown: '<rootDir>/src/test-utils/global-teardown.ts',
+  setupFiles: ['<rootDir>/src/test-utils/test-env.ts'],
+  setupFilesAfterEnv: ['<rootDir>/src/test-utils/setup.ts'],
 }
diff --git a/backend/package-lock.json b/backend/package-lock.json
index e8e6d6a9b..e9af64d9a 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -1597,6 +1597,32 @@
       "resolved": "https://registry.npmjs.org/@jsdevtools/ono/-/ono-7.1.3.tgz",
       "integrity": "sha512-4JQNk+3mVzK3xh2rqd6RB4J46qUR19azEHBneZyTZM+c456qOrbbM/5xcR8huNCCcbVt7+UmizG6GuUvPvKUYg=="
     },
+    "@nodelib/fs.scandir": {
+      "version": "2.1.4",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.4.tgz",
+      "integrity": "sha512-33g3pMJk3bg5nXbL/+CY6I2eJDzZAni49PfJnL5fghPTggPvBd/pFNSgJsdAgWptuFu7qq/ERvOYFlhvsLTCKA==",
+      "dev": true,
+      "requires": {
+        "@nodelib/fs.stat": "2.0.4",
+        "run-parallel": "^1.1.9"
+      }
+    },
+    "@nodelib/fs.stat": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-2.0.4.tgz",
+      "integrity": "sha512-IYlHJA0clt2+Vg7bccq+TzRdJvv19c2INqBSsoOLp1je7xjtr7J26+WXR72MCdvU9q1qTzIWDfhMf+DRvQJK4Q==",
+      "dev": true
+    },
+    "@nodelib/fs.walk": {
+      "version": "1.2.6",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.walk/-/fs.walk-1.2.6.tgz",
+      "integrity": "sha512-8Broas6vTtW4GIXTAHDoE32hnN2M5ykgCpWGbuXHQ15vEMqr23pB76e/GZcYsZCHALv50ktd24qhEyKr6wBtow==",
+      "dev": true,
+      "requires": {
+        "@nodelib/fs.scandir": "2.1.4",
+        "fastq": "^1.6.0"
+      }
+    },
     "@otplib/core": {
       "version": "12.0.1",
       "resolved": "https://registry.npmjs.org/@otplib/core/-/core-12.0.1.tgz",
@@ -1890,6 +1916,12 @@
         "@types/node": "*"
       }
     },
+    "@types/cookiejar": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/@types/cookiejar/-/cookiejar-2.1.2.tgz",
+      "integrity": "sha512-t73xJJrvdTjXrn4jLS9VSGRbz0nUY3cl2DMGDU48lKl+HR9dbbjW2A9r3g40VA++mQpy6uuHg33gy7du2BKpog==",
+      "dev": true
+    },
     "@types/cors": {
       "version": "2.8.6",
       "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.6.tgz",
@@ -2204,6 +2236,25 @@
       "integrity": "sha512-l42BggppR6zLmpfU6fq9HEa2oGPEI8yrSPL3GITjfRInppYFahObbIQOQK3UGxEnyQpltZLaPe75046NOZQikw==",
       "dev": true
     },
+    "@types/superagent": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/@types/superagent/-/superagent-4.1.10.tgz",
+      "integrity": "sha512-xAgkb2CMWUMCyVc/3+7iQfOEBE75NvuZeezvmixbUw3nmENf2tCnQkW5yQLTYqvXUQ+R6EXxdqKKbal2zM5V/g==",
+      "dev": true,
+      "requires": {
+        "@types/cookiejar": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/supertest": {
+      "version": "2.0.10",
+      "resolved": "https://registry.npmjs.org/@types/supertest/-/supertest-2.0.10.tgz",
+      "integrity": "sha512-Xt8TbEyZTnD5Xulw95GLMOkmjGICrOQyJ2jqgkSjAUR3mm7pAIzSR0NFBaMcwlzVvlpCjNwbATcWWwjNiZiFrQ==",
+      "dev": true,
+      "requires": {
+        "@types/superagent": "*"
+      }
+    },
     "@types/swagger-jsdoc": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/@types/swagger-jsdoc/-/swagger-jsdoc-3.0.2.tgz",
@@ -2283,6 +2334,22 @@
         "eslint-visitor-keys": "^1.1.0"
       }
     },
+    "@typescript-eslint/scope-manager": {
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-4.12.0.tgz",
+      "integrity": "sha512-QVf9oCSVLte/8jvOsxmgBdOaoe2J0wtEmBr13Yz0rkBNkl5D8bfnf6G4Vhox9qqMIoG7QQoVwd2eG9DM/ge4Qg==",
+      "dev": true,
+      "requires": {
+        "@typescript-eslint/types": "4.12.0",
+        "@typescript-eslint/visitor-keys": "4.12.0"
+      }
+    },
+    "@typescript-eslint/types": {
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-4.12.0.tgz",
+      "integrity": "sha512-N2RhGeheVLGtyy+CxRmxdsniB7sMSCfsnbh8K/+RUIXYYq3Ub5+sukRCjVE80QerrUBvuEvs4fDhz5AW/pcL6g==",
+      "dev": true
+    },
     "@typescript-eslint/typescript-estree": {
       "version": "2.25.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-2.25.0.tgz",
@@ -2335,6 +2402,24 @@
         }
       }
     },
+    "@typescript-eslint/visitor-keys": {
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-4.12.0.tgz",
+      "integrity": "sha512-hVpsLARbDh4B9TKYz5cLbcdMIOAoBYgFPCSP9FFS/liSF+b33gVNq8JHY3QGhHNVz85hObvL7BEYLlgx553WCw==",
+      "dev": true,
+      "requires": {
+        "@typescript-eslint/types": "4.12.0",
+        "eslint-visitor-keys": "^2.0.0"
+      },
+      "dependencies": {
+        "eslint-visitor-keys": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-2.0.0.tgz",
+          "integrity": "sha512-QudtT6av5WXels9WjIM7qz1XD1cWGvX4gGXvp/zBn9nXG02D0utdU3Em2m/QjTnrsk6bBjmCygl3rmj118msQQ==",
+          "dev": true
+        }
+      }
+    },
     "abab": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.3.tgz",
@@ -2575,6 +2660,12 @@
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
+    "array-union": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/array-union/-/array-union-2.1.0.tgz",
+      "integrity": "sha512-HGyxoOTYUyCM6stUe6EJgnd4EoewAI7zMdfqO+kGjnlZmBDz/cR5pf8r/cR4Wq60sL/p0IkcjUEEPwS3GFrIyw==",
+      "dev": true
+    },
     "array-unique": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
@@ -3498,6 +3589,12 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
       "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
     },
+    "cookiejar": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.2.tgz",
+      "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA==",
+      "dev": true
+    },
     "copy-descriptor": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/copy-descriptor/-/copy-descriptor-0.1.1.tgz",
@@ -3758,6 +3855,15 @@
       "integrity": "sha512-Hq8o7+6GaZeoFjtpgvRBUknSXNeJiCx7V9Fr94ZMljNiCr9n9L8H8aJqgWOQiDDGdyn29fRNcDdRVJ5fdyihfg==",
       "dev": true
     },
+    "dir-glob": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/dir-glob/-/dir-glob-3.0.1.tgz",
+      "integrity": "sha512-WkrWp9GR4KXfKGYzOLmTuGVi1UWFfws377n9cc55/tb6DuqyF6pcQ5AbiHEshaDpY9v6oaSr2XCDidGmMwdzIA==",
+      "dev": true,
+      "requires": {
+        "path-type": "^4.0.0"
+      }
+    },
     "doctrine": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
@@ -4033,6 +4139,86 @@
         "get-stdin": "^6.0.0"
       }
     },
+    "eslint-plugin-jest": {
+      "version": "24.1.3",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-jest/-/eslint-plugin-jest-24.1.3.tgz",
+      "integrity": "sha512-dNGGjzuEzCE3d5EPZQ/QGtmlMotqnYWD/QpCZ1UuZlrMAdhG5rldh0N0haCvhGnUkSeuORS5VNROwF9Hrgn3Lg==",
+      "dev": true,
+      "requires": {
+        "@typescript-eslint/experimental-utils": "^4.0.1"
+      },
+      "dependencies": {
+        "@typescript-eslint/experimental-utils": {
+          "version": "4.12.0",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/experimental-utils/-/experimental-utils-4.12.0.tgz",
+          "integrity": "sha512-MpXZXUAvHt99c9ScXijx7i061o5HEjXltO+sbYfZAAHxv3XankQkPaNi5myy0Yh0Tyea3Hdq1pi7Vsh0GJb0fA==",
+          "dev": true,
+          "requires": {
+            "@types/json-schema": "^7.0.3",
+            "@typescript-eslint/scope-manager": "4.12.0",
+            "@typescript-eslint/types": "4.12.0",
+            "@typescript-eslint/typescript-estree": "4.12.0",
+            "eslint-scope": "^5.0.0",
+            "eslint-utils": "^2.0.0"
+          }
+        },
+        "@typescript-eslint/typescript-estree": {
+          "version": "4.12.0",
+          "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-4.12.0.tgz",
+          "integrity": "sha512-gZkFcmmp/CnzqD2RKMich2/FjBTsYopjiwJCroxqHZIY11IIoN0l5lKqcgoAPKHt33H2mAkSfvzj8i44Jm7F4w==",
+          "dev": true,
+          "requires": {
+            "@typescript-eslint/types": "4.12.0",
+            "@typescript-eslint/visitor-keys": "4.12.0",
+            "debug": "^4.1.1",
+            "globby": "^11.0.1",
+            "is-glob": "^4.0.1",
+            "lodash": "^4.17.15",
+            "semver": "^7.3.2",
+            "tsutils": "^3.17.1"
+          }
+        },
+        "debug": {
+          "version": "4.3.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.1.tgz",
+          "integrity": "sha512-doEwdvm4PCeK4K3RQN2ZC2BYUBaxwLARCqZmMjtF8a51J2Rb0xpVloFRnCODwqjpwnAoao4pelN8l3RJdv3gRQ==",
+          "dev": true,
+          "requires": {
+            "ms": "2.1.2"
+          }
+        },
+        "lru-cache": {
+          "version": "6.0.0",
+          "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
+          "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
+          "dev": true,
+          "requires": {
+            "yallist": "^4.0.0"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "dev": true
+        },
+        "semver": {
+          "version": "7.3.4",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.4.tgz",
+          "integrity": "sha512-tCfb2WLjqFAtXn4KEdxIhalnRtoKFN7nAwj0B3ZXCbQloV2tq5eDbcTmT68JJD3nRJq24/XgxtQKFIpQdtvmVw==",
+          "dev": true,
+          "requires": {
+            "lru-cache": "^6.0.0"
+          }
+        },
+        "yallist": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+          "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
+          "dev": true
+        }
+      }
+    },
     "eslint-plugin-prettier": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-3.1.3.tgz",
@@ -4468,6 +4654,20 @@
       "integrity": "sha512-xJuoT5+L99XlZ8twedaRf6Ax2TgQVxvgZOYoPKqZufmJib0tL2tegPBOZb1pVNgIhlqDlA0eO0c3wBvQcmzx4w==",
       "dev": true
     },
+    "fast-glob": {
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.2.4.tgz",
+      "integrity": "sha512-kr/Oo6PX51265qeuCYsyGypiO5uJFgBS0jksyG7FUeCyQzNwYnzrNIMR1NXfkZXsMYXYLRAHgISHBz8gQcxKHQ==",
+      "dev": true,
+      "requires": {
+        "@nodelib/fs.stat": "^2.0.2",
+        "@nodelib/fs.walk": "^1.2.3",
+        "glob-parent": "^5.1.0",
+        "merge2": "^1.3.0",
+        "micromatch": "^4.0.2",
+        "picomatch": "^2.2.1"
+      }
+    },
     "fast-json-stable-stringify": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.1.0.tgz",
@@ -4489,6 +4689,15 @@
       "resolved": "https://registry.npmjs.org/fast-xml-parser/-/fast-xml-parser-3.18.0.tgz",
       "integrity": "sha512-tRrwShhppv0K5GKEtuVs92W0VGDaVltZAwtHbpjNF+JOT7cjIFySBGTEOmdBslXYyWYaZwEX/g4Su8ZeKg0LKQ=="
     },
+    "fastq": {
+      "version": "1.11.0",
+      "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.11.0.tgz",
+      "integrity": "sha512-7Eczs8gIPDrVzT+EksYBcupqMyxSHXXrHOLRRxU2/DicV8789MRBRR8+Hc2uWzUupOs4YS4JzBmBxjjCVBxD/g==",
+      "dev": true,
+      "requires": {
+        "reusify": "^1.0.4"
+      }
+    },
     "fb-watchman": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/fb-watchman/-/fb-watchman-2.0.1.tgz",
@@ -4638,6 +4847,12 @@
         "mime-types": "^2.1.12"
       }
     },
+    "formidable": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/formidable/-/formidable-1.2.2.tgz",
+      "integrity": "sha512-V8gLm+41I/8kguQ4/o1D3RIHRmhYFG4pnNyonvua+40rqcEmT4+V71yaZ3B457xbbgCsCfjSPi65u/W6vK1U5Q==",
+      "dev": true
+    },
     "forwarded": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.1.2.tgz",
@@ -4858,6 +5073,28 @@
         "type-fest": "^0.8.1"
       }
     },
+    "globby": {
+      "version": "11.0.2",
+      "resolved": "https://registry.npmjs.org/globby/-/globby-11.0.2.tgz",
+      "integrity": "sha512-2ZThXDvvV8fYFRVIxnrMQBipZQDr7MxKAmQK1vujaj9/7eF0efG7BPUKJ7jP7G5SLF37xKDXvO4S/KKLj/Z0og==",
+      "dev": true,
+      "requires": {
+        "array-union": "^2.1.0",
+        "dir-glob": "^3.0.1",
+        "fast-glob": "^3.1.1",
+        "ignore": "^5.1.4",
+        "merge2": "^1.3.0",
+        "slash": "^3.0.0"
+      },
+      "dependencies": {
+        "ignore": {
+          "version": "5.1.8",
+          "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.1.8.tgz",
+          "integrity": "sha512-BMpfD7PpiETpBl/A6S498BaIJ6Y/ABT93ETbby2fP00v4EbvPBXWEoaR1UBPKs3iR53pJY7EtZk5KACI57i1Uw==",
+          "dev": true
+        }
+      }
+    },
     "graceful-fs": {
       "version": "4.2.4",
       "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
@@ -8033,6 +8270,12 @@
       "integrity": "sha512-abv/qOcuPfk3URPfDzmZU1LKmuw8kT+0nIHvKrKgFrwifol/doWcdA4ZqsWQ8ENrFKkd67Mfpo/LovbIUsbt3w==",
       "dev": true
     },
+    "merge2": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/merge2/-/merge2-1.4.1.tgz",
+      "integrity": "sha512-8q7VEgMJW4J8tcfVPy8g09NcQwZdbwFEqhe/WZkoIzjn/3TGDwtOCYtXGxA3O8tPzpczCCDgv+P2P5y00ZJOOg==",
+      "dev": true
+    },
     "methods": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
@@ -15735,6 +15978,12 @@
         "any-promise": "^1.3.0"
       }
     },
+    "reusify": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/reusify/-/reusify-1.0.4.tgz",
+      "integrity": "sha512-U9nH88a3fc/ekCF1l0/UP1IosiuIjyTh7hBvXVMHYgVcfGvt897Xguj2UOLDeI5BG2m7/uwyaLVT6fbtCwTyzw==",
+      "dev": true
+    },
     "rimraf": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
@@ -15780,6 +16029,12 @@
         "is-promise": "^2.1.0"
       }
     },
+    "run-parallel": {
+      "version": "1.1.10",
+      "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.1.10.tgz",
+      "integrity": "sha512-zb/1OuZ6flOlH6tQyMPUrE3x3Ulxjlo9WIVXR4yVYi4H9UXQaeIsPbLn2R3O3vQCnDKkAl2qHiuocKKX4Tz/Sw==",
+      "dev": true
+    },
     "rxjs": {
       "version": "6.5.4",
       "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.4.tgz",
@@ -16643,6 +16898,125 @@
       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
       "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
     },
+    "superagent": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/superagent/-/superagent-6.1.0.tgz",
+      "integrity": "sha512-OUDHEssirmplo3F+1HWKUrUjvnQuA+nZI6i/JJBdXb5eq9IyEQwPyPpqND+SSsxf6TygpBEkUjISVRN4/VOpeg==",
+      "dev": true,
+      "requires": {
+        "component-emitter": "^1.3.0",
+        "cookiejar": "^2.1.2",
+        "debug": "^4.1.1",
+        "fast-safe-stringify": "^2.0.7",
+        "form-data": "^3.0.0",
+        "formidable": "^1.2.2",
+        "methods": "^1.1.2",
+        "mime": "^2.4.6",
+        "qs": "^6.9.4",
+        "readable-stream": "^3.6.0",
+        "semver": "^7.3.2"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.3.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.1.tgz",
+          "integrity": "sha512-doEwdvm4PCeK4K3RQN2ZC2BYUBaxwLARCqZmMjtF8a51J2Rb0xpVloFRnCODwqjpwnAoao4pelN8l3RJdv3gRQ==",
+          "dev": true,
+          "requires": {
+            "ms": "2.1.2"
+          }
+        },
+        "form-data": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/form-data/-/form-data-3.0.0.tgz",
+          "integrity": "sha512-CKMFDglpbMi6PyN+brwB9Q/GOw0eAnsrEZDgcsH5Krhz5Od/haKHAX0NmQfha2zPPz0JpWzA7GJHGSnvCRLWsg==",
+          "dev": true,
+          "requires": {
+            "asynckit": "^0.4.0",
+            "combined-stream": "^1.0.8",
+            "mime-types": "^2.1.12"
+          }
+        },
+        "lru-cache": {
+          "version": "6.0.0",
+          "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
+          "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
+          "dev": true,
+          "requires": {
+            "yallist": "^4.0.0"
+          }
+        },
+        "mime": {
+          "version": "2.4.7",
+          "resolved": "https://registry.npmjs.org/mime/-/mime-2.4.7.tgz",
+          "integrity": "sha512-dhNd1uA2u397uQk3Nv5LM4lm93WYDUXFn3Fu291FJerns4jyTudqhIWe4W04YLy7Uk1tm1Ore04NpjRvQp/NPA==",
+          "dev": true
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "dev": true
+        },
+        "qs": {
+          "version": "6.9.4",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.9.4.tgz",
+          "integrity": "sha512-A1kFqHekCTM7cz0udomYUoYNWjBebHm/5wzU/XqrBRBNWectVH0QIiN+NEcZ0Dte5hvzHwbr8+XQmguPhJ6WdQ==",
+          "dev": true
+        },
+        "readable-stream": {
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+          "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.3",
+            "string_decoder": "^1.1.1",
+            "util-deprecate": "^1.0.1"
+          }
+        },
+        "safe-buffer": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+          "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+          "dev": true
+        },
+        "semver": {
+          "version": "7.3.4",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.4.tgz",
+          "integrity": "sha512-tCfb2WLjqFAtXn4KEdxIhalnRtoKFN7nAwj0B3ZXCbQloV2tq5eDbcTmT68JJD3nRJq24/XgxtQKFIpQdtvmVw==",
+          "dev": true,
+          "requires": {
+            "lru-cache": "^6.0.0"
+          }
+        },
+        "string_decoder": {
+          "version": "1.3.0",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+          "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+          "dev": true,
+          "requires": {
+            "safe-buffer": "~5.2.0"
+          }
+        },
+        "yallist": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+          "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
+          "dev": true
+        }
+      }
+    },
+    "supertest": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/supertest/-/supertest-6.0.1.tgz",
+      "integrity": "sha512-8yDNdm+bbAN/jeDdXsRipbq9qMpVF7wRsbwLgsANHqdjPsCoecmlTuqEcLQMGpmojFBhxayZ0ckXmLXYq7e+0g==",
+      "dev": true,
+      "requires": {
+        "methods": "1.1.2",
+        "superagent": "6.1.0"
+      }
+    },
     "supports-color": {
       "version": "5.5.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
@@ -17081,9 +17455,9 @@
       "integrity": "sha512-XrHUvV5HpdLmIj4uVMxHggLbFSZYIn7HEWsqePZcI50pco+MPqJ50wMGY794X7AOOhxOBAjbkqfAbEe/QMp2Lw=="
     },
     "ts-jest": {
-      "version": "25.4.0",
-      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-25.4.0.tgz",
-      "integrity": "sha512-+0ZrksdaquxGUBwSdTIcdX7VXdwLIlSRsyjivVA9gcO+Cvr6ByqDhu/mi5+HCcb6cMkiQp5xZ8qRO7/eCqLeyw==",
+      "version": "25.5.1",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-25.5.1.tgz",
+      "integrity": "sha512-kHEUlZMK8fn8vkxDjwbHlxXRB9dHYpyzqKIGDNxbzs+Rz+ssNDSDNusEK8Fk/sDd4xE6iKoQLfFkFVaskmTJyw==",
       "dev": true,
       "requires": {
         "bs-logger": "0.x",
@@ -17093,18 +17467,11 @@
         "lodash.memoize": "4.x",
         "make-error": "1.x",
         "micromatch": "4.x",
-        "mkdirp": "1.x",
-        "resolve": "1.x",
+        "mkdirp": "0.x",
         "semver": "6.x",
         "yargs-parser": "18.x"
       },
       "dependencies": {
-        "mkdirp": {
-          "version": "1.0.4",
-          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
-          "integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==",
-          "dev": true
-        },
         "semver": {
           "version": "6.3.0",
           "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
diff --git a/backend/package.json b/backend/package.json
index f04b23bd5..b5cc496be 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -4,14 +4,14 @@
   "description": "Backend / API server for Postman",
   "main": "build/server.js",
   "scripts": {
-    "build": "rimraf build && tsc",
+    "build": "rimraf build && tsc -p tsconfig.build.json",
     "dev": "npm run postbuild && tsc-watch --onSuccess \"node ./build/server.js\"",
     "lint-no-fix": "tsc --noEmit && eslint --ext .js,.ts --cache .",
     "lint": "npm run lint-no-fix -- --fix",
     "postbuild": "npm run copy-assets",
     "start": "node build/server",
     "copy-assets": "copyfiles -u 1 src/assets/* src/**/*.sql build",
-    "test": "jest",
+    "test": "jest --maxWorkers=2",
     "test:watch": "jest --watch",
     "precommit": "lint-staged"
   },
@@ -83,6 +83,7 @@
     "@types/papaparse": "^5.0.4",
     "@types/qs": "^6.9.4",
     "@types/redis": "^2.8.17",
+    "@types/supertest": "^2.0.10",
     "@types/swagger-jsdoc": "^3.0.2",
     "@types/swagger-ui-express": "^4.1.2",
     "@types/uuid": "^7.0.2",
@@ -92,12 +93,14 @@
     "copyfiles": "^2.2.0",
     "eslint": "^6.8.0",
     "eslint-config-prettier": "^6.11.0",
+    "eslint-plugin-jest": "^24.1.3",
     "eslint-plugin-prettier": "^3.1.3",
     "jest": "^25.5.2",
     "lint-staged": "^10.2.6",
     "prettier": "^2.0.5",
     "rimraf": "^3.0.2",
-    "ts-jest": "^25.4.0",
+    "supertest": "^6.0.1",
+    "ts-jest": "^25.5.1",
     "tsc-watch": "^4.2.3",
     "typescript": "^3.8.3"
   },
diff --git a/backend/src/core/routes/tests/auth.routes.test.ts b/backend/src/core/routes/tests/auth.routes.test.ts
new file mode 100644
index 000000000..5b83574a9
--- /dev/null
+++ b/backend/src/core/routes/tests/auth.routes.test.ts
@@ -0,0 +1,132 @@
+import request from 'supertest'
+import { Sequelize } from 'sequelize-typescript'
+import bcrypt from 'bcrypt'
+import initialiseServer from '@test-utils/server'
+import sequelizeLoader from '@test-utils/sequelize-loader'
+import { MailService, RedisService } from '@core/services'
+import { User } from '@core/models'
+
+const app = initialiseServer()
+const appWithUserSession = initialiseServer(true)
+let sequelize: Sequelize
+
+beforeAll(async () => {
+  sequelize = await sequelizeLoader(process.env.JEST_WORKER_ID || '1')
+})
+
+afterEach(async () => {
+  await User.destroy({ where: {} })
+})
+
+afterAll(async () => {
+  await sequelize.close()
+  RedisService.otpClient.quit()
+  RedisService.sessionClient.quit()
+})
+
+describe('POST /auth/otp', () => {
+  test('Invalid email format', async () => {
+    const res = await request(app)
+      .post('/auth/otp')
+      .send({ email: 'user!@open' })
+    expect(res.status).toBe(400)
+  })
+
+  test('Non gov.sg and non-whitelisted email', async () => {
+    // There are no users in the db
+    const res = await request(app)
+      .post('/auth/otp')
+      .send({ email: 'user@agency.com.sg' })
+    expect(res.status).toBe(401)
+    expect(res.body).toEqual({ message: 'User is not authorized' })
+  })
+
+  test('OTP is generated and sent to user', async () => {
+    const res = await request(app)
+      .post('/auth/otp')
+      .send({ email: 'user@agency.gov.sg' })
+    expect(res.status).toBe(200)
+
+    expect(MailService.mailClient.sendMail).toHaveBeenCalledWith(
+      expect.objectContaining({
+        body: expect.stringMatching(/Your OTP is <b>[0-9]{6}<\/b>/),
+      })
+    )
+  })
+})
+
+describe('POST /auth/login', () => {
+  test('Invalid otp format provided', async () => {
+    const res = await request(app)
+      .post('/auth/login')
+      .send({ email: 'user@agency.gov.sg', otp: '123' })
+    expect(res.status).toBe(400)
+  })
+
+  test('Invalid otp provided', async () => {
+    const res = await request(app)
+      .post('/auth/login')
+      .send({ email: 'user@agency.gov.sg', otp: '000000' })
+    expect(res.status).toBe(401)
+  })
+
+  test('OTP is invalidated after retries are exceeded', async () => {
+    const email = 'user@agency.gov.sg'
+    RedisService.otpClient.set(
+      email,
+      JSON.stringify({
+        retries: 1,
+        hash: await bcrypt.hash('123456', 10),
+        createdAt: 123,
+      })
+    )
+    const res = await request(app)
+      .post('/auth/login')
+      .send({ email, otp: '000000' })
+    expect(res.status).toBe(401)
+
+    // OTP should be deleted after exceeding retries
+    RedisService.otpClient.get(email, (_err, value) => {
+      expect(value).toBe(null)
+    })
+  })
+
+  test('Valid otp provided', async () => {
+    const email = 'user@agency.gov.sg'
+    RedisService.otpClient.set(
+      email,
+      JSON.stringify({
+        retries: 1,
+        hash: await bcrypt.hash('123456', 10),
+        createdAt: 123,
+      })
+    )
+
+    const res = await request(app)
+      .post('/auth/login')
+      .send({ email, otp: '123456' })
+    expect(res.status).toBe(200)
+  })
+})
+
+describe('GET /auth/userinfo', () => {
+  test('No existing session', async () => {
+    const res = await request(app).get('/auth/userinfo')
+    expect(res.status).toBe(200)
+    expect(res.body).toEqual({})
+  })
+
+  test('Existing session found', async () => {
+    await User.create({ id: 1, email: 'user@agency.gov.sg' })
+    const res = await request(appWithUserSession).get('/auth/userinfo')
+    expect(res.status).toBe(200)
+    expect(res.body).toEqual({ id: 1, email: 'user@agency.gov.sg' })
+  })
+})
+
+describe('GET /auth/logout', () => {
+  test('Successfully logged out', async () => {
+    const res = await request(appWithUserSession).get('/auth/logout')
+    expect(res.status).toBe(200)
+  })
+})
diff --git a/backend/src/core/routes/tests/campaign.routes.test.ts b/backend/src/core/routes/tests/campaign.routes.test.ts
new file mode 100644
index 000000000..ba2329e49
--- /dev/null
+++ b/backend/src/core/routes/tests/campaign.routes.test.ts
@@ -0,0 +1,203 @@
+import request from 'supertest'
+import { Sequelize } from 'sequelize-typescript'
+import initialiseServer from '@test-utils/server'
+import { Campaign, User, UserDemo } from '@core/models'
+import sequelizeLoader from '@test-utils/sequelize-loader'
+import { RedisService } from '@core/services'
+import { ChannelType } from '@core/constants'
+
+const app = initialiseServer(true)
+let sequelize: Sequelize
+
+beforeAll(async () => {
+  sequelize = await sequelizeLoader(process.env.JEST_WORKER_ID || '1')
+  await User.create({ id: 1, email: 'user@agency.gov.sg' })
+})
+
+afterEach(async () => {
+  await Campaign.destroy({ where: {} })
+})
+
+afterAll(async () => {
+  await User.destroy({ where: {} })
+  await sequelize.close()
+  RedisService.otpClient.quit()
+  RedisService.sessionClient.quit()
+})
+
+describe('GET /campaigns', () => {
+  test('List campaigns with default limit and offset', async () => {
+    await Campaign.create({
+      name: 'campaign-1',
+      userId: 1,
+      type: 'SMS',
+      valid: false,
+      protect: false,
+    })
+    await Campaign.create({
+      name: 'campaign-2',
+      userId: 1,
+      type: 'SMS',
+      valid: false,
+      protect: false,
+    })
+
+    const res = await request(app).get('/campaigns')
+    expect(res.status).toBe(200)
+    expect(res.body).toEqual({
+      total_count: 2,
+      campaigns: expect.arrayContaining([
+        expect.objectContaining({ id: expect.any(Number) }),
+      ]),
+    })
+  })
+
+  test('List campaigns with defined limit and offset', async () => {
+    for (let i = 1; i <= 3; i++) {
+      await Campaign.create({
+        name: `campaign-${i}`,
+        userId: 1,
+        type: 'SMS',
+        valid: false,
+        protect: false,
+      })
+    }
+
+    const res = await request(app)
+      .get('/campaigns')
+      .query({ limit: 1, offset: 2 })
+    expect(res.status).toBe(200)
+    expect(res.body).toEqual({
+      total_count: 3,
+      campaigns: expect.arrayContaining([
+        expect.objectContaining({ name: 'campaign-1' }),
+      ]),
+    })
+  })
+})
+
+describe('POST /campaigns', () => {
+  test('Successfully create SMS campaign', async () => {
+    const res = await request(app).post('/campaigns').send({
+      name: 'test',
+      type: ChannelType.SMS,
+    })
+    expect(res.status).toBe(201)
+    expect(res.body).toEqual(
+      expect.objectContaining({
+        name: 'test',
+        type: ChannelType.SMS,
+        protect: false,
+      })
+    )
+  })
+
+  test('Successfully create Email campaign', async () => {
+    const res = await request(app).post('/campaigns').send({
+      name: 'test',
+      type: ChannelType.Email,
+    })
+    expect(res.status).toBe(201)
+    expect(res.body).toEqual(
+      expect.objectContaining({
+        name: 'test',
+        type: ChannelType.Email,
+        protect: false,
+      })
+    )
+  })
+
+  test('Successfully create Protected Email campaign', async () => {
+    const campaign = {
+      name: 'test',
+      type: ChannelType.Email,
+      protect: true,
+    }
+    const res = await request(app).post('/campaigns').send(campaign)
+    expect(res.status).toBe(201)
+    expect(res.body).toEqual(expect.objectContaining(campaign))
+  })
+
+  test('Successfully create Telegram campaign', async () => {
+    const res = await request(app).post('/campaigns').send({
+      name: 'test',
+      type: ChannelType.Telegram,
+    })
+    expect(res.status).toBe(201)
+    expect(res.body).toEqual(
+      expect.objectContaining({
+        name: 'test',
+        type: ChannelType.Telegram,
+        protect: false,
+      })
+    )
+  })
+
+  test('Successfully create demo SMS campaign', async () => {
+    const campaign = {
+      name: 'demo',
+      type: ChannelType.SMS,
+      demo_message_limit: 10,
+    }
+    const res = await request(app).post('/campaigns').send(campaign)
+    expect(res.status).toBe(201)
+    expect(res.body).toEqual(
+      expect.objectContaining({
+        ...campaign,
+        demo_message_limit: 10,
+      })
+    )
+
+    const demo = await UserDemo.findOne({ where: { userId: 1 } })
+    expect(demo?.numDemosSms).toEqual(2)
+  })
+
+  test('Successfully create demo Telegram campaign', async () => {
+    const campaign = {
+      name: 'demo',
+      type: ChannelType.Telegram,
+      demo_message_limit: 10,
+    }
+    const res = await request(app).post('/campaigns').send(campaign)
+    expect(res.status).toBe(201)
+    expect(res.body).toEqual(
+      expect.objectContaining({
+        ...campaign,
+        demo_message_limit: 10,
+      })
+    )
+
+    const demo = await UserDemo.findOne({ where: { userId: 1 } })
+    expect(demo?.numDemosTelegram).toEqual(2)
+  })
+
+  test('Unable to create demo Telegram campaign after user has no demos left', async () => {
+    const campaign = {
+      name: 'demo',
+      type: ChannelType.Telegram,
+      demo_message_limit: 10,
+    }
+    await UserDemo.update({ numDemosTelegram: 0 }, { where: { userId: 1 } })
+    const res = await request(app).post('/campaigns').send(campaign)
+    expect(res.status).toBe(400)
+  })
+
+  test('Unable to create demo campaign for unsupported channel', async () => {
+    const campaign = {
+      name: 'demo',
+      type: ChannelType.Email,
+      demo_message_limit: 10,
+    }
+    const res = await request(app).post('/campaigns').send(campaign)
+    expect(res.status).toBe(400)
+  })
+
+  test('Unable to create protected campaign for unsupported channel', async () => {
+    const res = await request(app).post('/campaigns').send({
+      name: 'test',
+      type: 'SMS',
+      protect: true,
+    })
+    expect(res.status).toBe(403)
+  })
+})
diff --git a/backend/__tests__/parse-csv.service.test.ts b/backend/src/core/services/tests/parse-csv.service.test.ts
similarity index 100%
rename from backend/__tests__/parse-csv.service.test.ts
rename to backend/src/core/services/tests/parse-csv.service.test.ts
diff --git a/backend/__tests__/phone-number.service.test.ts b/backend/src/core/services/tests/phone-number.service.test.ts
similarity index 100%
rename from backend/__tests__/phone-number.service.test.ts
rename to backend/src/core/services/tests/phone-number.service.test.ts
diff --git a/backend/src/test-utils/global-setup.ts b/backend/src/test-utils/global-setup.ts
new file mode 100644
index 000000000..f80e22037
--- /dev/null
+++ b/backend/src/test-utils/global-setup.ts
@@ -0,0 +1,29 @@
+import { Sequelize, SequelizeOptions } from 'sequelize-typescript'
+import config from '../core/config'
+
+declare global {
+  // eslint-disable-next-line @typescript-eslint/no-namespace
+  namespace NodeJS {
+    interface Global {
+      sequelize: Sequelize
+    }
+  }
+}
+const DB_URI = 'postgres://localhost:5432/postgres'
+const TEST_DB = 'postmangovsg_test'
+// The number of workers should match the maxWorkers
+// defined in  npm test command
+const JEST_WORKERS = 2
+
+module.exports = async () => {
+  global.sequelize = new Sequelize(DB_URI, {
+    dialect: 'postgres',
+    logging: false,
+    pool: config.get('database.poolOptions'),
+  } as SequelizeOptions)
+
+  for (let i = 1; i <= JEST_WORKERS; i++) {
+    await global.sequelize.query(`DROP DATABASE IF EXISTS ${TEST_DB}_${i}`)
+    await global.sequelize.query(`CREATE DATABASE ${TEST_DB}_${i}`)
+  }
+}
diff --git a/backend/src/test-utils/global-teardown.ts b/backend/src/test-utils/global-teardown.ts
new file mode 100644
index 000000000..cf5586169
--- /dev/null
+++ b/backend/src/test-utils/global-teardown.ts
@@ -0,0 +1,3 @@
+module.exports = async function () {
+  await global.sequelize.close()
+}
diff --git a/backend/src/test-utils/sequelize-loader.ts b/backend/src/test-utils/sequelize-loader.ts
new file mode 100644
index 000000000..0cdca8fec
--- /dev/null
+++ b/backend/src/test-utils/sequelize-loader.ts
@@ -0,0 +1,100 @@
+import { Sequelize, SequelizeOptions } from 'sequelize-typescript'
+import config from '@core/config'
+import {
+  Credential,
+  JobQueue,
+  Campaign,
+  Worker,
+  User,
+  UserFeature,
+  UserCredential,
+  UserDemo,
+  Statistic,
+  ProtectedMessage,
+  Unsubscriber,
+} from '@core/models'
+import {
+  EmailMessage,
+  EmailTemplate,
+  EmailOp,
+  EmailBlacklist,
+  EmailFromAddress,
+} from '@email/models'
+import { SmsMessage, SmsTemplate, SmsOp } from '@sms/models'
+import {
+  BotSubscriber,
+  TelegramMessage,
+  TelegramOp,
+  TelegramSubscriber,
+  TelegramTemplate,
+} from '@telegram/models'
+
+import { DefaultCredentialName } from '@core/constants'
+import { formatDefaultCredentialName } from '@core/utils'
+
+const DB_TEST_URI = config.get('database.databaseUri')
+
+const sequelizeLoader = async (dbName: string): Promise<Sequelize> => {
+  const sequelize = new Sequelize(`${DB_TEST_URI}_${dbName}`, {
+    dialect: 'postgres',
+    logging: false,
+    pool: config.get('database.poolOptions'),
+  } as SequelizeOptions)
+
+  const coreModels = [
+    Credential,
+    JobQueue,
+    Campaign,
+    Worker,
+    User,
+    UserFeature,
+    UserCredential,
+    UserDemo,
+    Statistic,
+    Unsubscriber,
+  ]
+  const emailModels = [
+    EmailMessage,
+    EmailTemplate,
+    EmailOp,
+    EmailBlacklist,
+    ProtectedMessage,
+    EmailFromAddress,
+  ]
+  const smsModels = [SmsMessage, SmsTemplate, SmsOp]
+  const telegramModels = [
+    BotSubscriber,
+    TelegramOp,
+    TelegramMessage,
+    TelegramTemplate,
+    TelegramSubscriber,
+  ]
+  sequelize.addModels([
+    ...coreModels,
+    ...emailModels,
+    ...smsModels,
+    ...telegramModels,
+  ])
+
+  try {
+    await sequelize.sync()
+    console.log({ message: 'Test Database loaded.' })
+  } catch (error) {
+    console.log(error.message)
+    console.error({ message: 'Unable to connect to test database', error })
+    process.exit(1)
+  }
+  // Create the default credential names in the credentials table
+  // Each name should be accompanied by an entry in Secrets Manager
+  await Promise.all(
+    [
+      DefaultCredentialName.Email,
+      formatDefaultCredentialName(DefaultCredentialName.SMS),
+      formatDefaultCredentialName(DefaultCredentialName.Telegram),
+    ].map((name) => Credential.upsert({ name }))
+  )
+
+  return sequelize
+}
+
+export default sequelizeLoader
diff --git a/backend/src/test-utils/server.ts b/backend/src/test-utils/server.ts
new file mode 100644
index 000000000..d127e16a3
--- /dev/null
+++ b/backend/src/test-utils/server.ts
@@ -0,0 +1,29 @@
+import express, { Request, Response, NextFunction } from 'express'
+import { errors as celebrateErrorMiddleware } from 'celebrate'
+import bodyParser from 'body-parser'
+import sessionLoader from '@core/loaders/session.loader'
+import routes from '@core/routes'
+
+const initialiseServer = (session?: boolean): express.Application => {
+  const app: express.Application = express()
+  sessionLoader({ app })
+  app.use(bodyParser.json())
+  app.use(bodyParser.urlencoded({ extended: false }))
+
+  app.use((req: Request, _res: Response, next: NextFunction): void => {
+    if (session && req.session) {
+      req.session.user = {
+        id: 1,
+        email: 'user@agency.gov.sg',
+      }
+    }
+    next()
+  })
+
+  app.use(routes)
+  app.use(celebrateErrorMiddleware())
+
+  return app
+}
+
+export default initialiseServer
diff --git a/backend/__tests__/setup.js b/backend/src/test-utils/setup.ts
similarity index 70%
rename from backend/__tests__/setup.js
rename to backend/src/test-utils/setup.ts
index d88a56f05..c8ff81811 100644
--- a/backend/__tests__/setup.js
+++ b/backend/src/test-utils/setup.ts
@@ -1,8 +1,12 @@
 /* eslint-disable no-console */
 global.console = {
+  ...global.console,
   log: jest.fn(), // console.log are ignored in tests
   error: console.error,
   warn: console.warn,
   info: console.info,
   debug: console.debug,
 }
+
+// Mock services
+jest.mock('@core/services/mail-client.class')
diff --git a/backend/src/test-utils/test-env.ts b/backend/src/test-utils/test-env.ts
new file mode 100644
index 000000000..7d33c5b18
--- /dev/null
+++ b/backend/src/test-utils/test-env.ts
@@ -0,0 +1,6 @@
+process.env.REDIS_OTP_URI = 'redis://localhost:6379/3'
+process.env.REDIS_SESSION_URI = 'redis://localhost:6379/4'
+process.env.SENDGRID_PUBLIC_KEY =
+  'MFYwEAYHKoZIzj0CAQYFK4EEAAoDQgAEKWFCI/58CSJe4uz9WX7VZZBIoeb3c1UEJ+pe3HL0ywyGA6c3Bq92+1YVKv0HHxf5mjm+t47P672gcaYarlp2LA=='
+process.env.SESSION_SECRET = 'SESSIONSECRET'
+process.env.DB_URI = 'postgres://localhost:5432/postmangovsg_test'
diff --git a/backend/tsconfig.build.json b/backend/tsconfig.build.json
new file mode 100644
index 000000000..b792dc00f
--- /dev/null
+++ b/backend/tsconfig.build.json
@@ -0,0 +1,5 @@
+// Excludes test in builds
+{
+  "extends": "./tsconfig.json",
+  "exclude": ["tests/"]
+}
diff --git a/backend/tsconfig.json b/backend/tsconfig.json
index 32df37e0d..4803d7878 100644
--- a/backend/tsconfig.json
+++ b/backend/tsconfig.json
@@ -1,6 +1,7 @@
 {
   "include": [
     "./src/**/*",
+    "./tests/**/*",
   ],
   "exclude": [
     "node_modules"
@@ -22,7 +23,7 @@
     "sourceMap": true,                        /* Generates corresponding '.map' file. */
     // "outFile": "./",                       /* Concatenate and emit output to single file. */
     "outDir": "./build",                      /* Redirect output structure to the directory. */
-    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    "rootDir": "./",                          /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
     // "composite": true,                     /* Enable project compilation */
     // "incremental": true,                   /* Enable incremental compilation */
     // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
@@ -50,12 +51,13 @@
 
     /* Module Resolution Options */
     "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
-    "baseUrl": "./src",                       /* Base directory to resolve non-absolute module names. */
+    "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
     "paths": {
-      "@core/*": ["core/*"],
-      "@sms/*": ["sms/*"],
-      "@email/*": ["email/*"],
-      "@telegram/*": ["telegram/*"],
+      "@core/*": ["src/core/*"],
+      "@sms/*": ["src/sms/*"],
+      "@email/*": ["src/email/*"],
+      "@telegram/*": ["src/telegram/*"],
+      "@test-utils/*": ["src/test-utils/*"],
     },                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
     // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
     // "typeRoots": [],                       /* List of folders to include type definitions from. */
@@ -74,4 +76,4 @@
     "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
     "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
   },
-}
\ No newline at end of file
+}