diff --git a/Gemfile b/Gemfile
index 6f9eeb837..69b7428cb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,6 +15,7 @@ gem 'pg', '~> 1.1'
 gem 'puma', '~> 5.6'
 gem 'rack-cors'
 gem 'rails', '~> 7.0.0'
+gem 'sentry-rails', '~> 5.5.0'
 gem 'sprockets-rails'
 gem 'stimulus-rails'
 gem 'turbo-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index 0c4c14262..7580d75dc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -247,6 +247,11 @@ GEM
       rubocop (~> 1.19)
     ruby-progressbar (1.11.0)
     ruby2_keywords (0.0.5)
+    sentry-rails (5.5.0)
+      railties (>= 5.0)
+      sentry-ruby (~> 5.5.0)
+    sentry-ruby (5.5.0)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
     shoulda-matchers (5.0.0)
       activesupport (>= 5.2.0)
     simplecov (0.21.2)
@@ -308,6 +313,7 @@ DEPENDENCIES
   rubocop
   rubocop-rails
   rubocop-rspec
+  sentry-rails (~> 5.5.0)
   shoulda-matchers (~> 5.0)
   simplecov
   sprockets-rails
diff --git a/app/concepts/project/operation/create.rb b/app/concepts/project/operation/create.rb
index 2fa9da926..2bd6c3e3c 100644
--- a/app/concepts/project/operation/create.rb
+++ b/app/concepts/project/operation/create.rb
@@ -1,13 +1,22 @@
 # frozen_string_literal: true
 
+require 'operation_response'
+
 class Project
   module Operation
     class Create
-      require 'operation_response'
-
-      DEFAULT_COMPONENT = { name: 'main', extension: 'py', default: true, index: 0 }.freeze
-      DEFAULT_PROJECT = { type: 'python', name: 'Untitled project', components: [DEFAULT_COMPONENT],
-                          image_list: [] }.freeze
+      DEFAULT_COMPONENT = {
+        name: 'main',
+        extension: 'py',
+        default: true,
+        index: 0
+      }.freeze
+      DEFAULT_PROJECT = {
+        type: 'python',
+        name: 'Untitled project',
+        components: [DEFAULT_COMPONENT],
+        image_list: []
+      }.freeze
 
       class << self
         def call(user_id:, params:)
@@ -26,8 +35,8 @@ def call(user_id:, params:)
           response[:project] = new_project
           response[:project].save!
           response
-        rescue StandardError
-          # TODO: log error
+        rescue StandardError => e
+          Sentry.capture_exception(e)
           response[:error] = 'Error creating project'
           response
         end
diff --git a/app/concepts/project/operation/create_remix.rb b/app/concepts/project/operation/create_remix.rb
index 42cea7ac2..0f49cd77a 100644
--- a/app/concepts/project/operation/create_remix.rb
+++ b/app/concepts/project/operation/create_remix.rb
@@ -1,16 +1,20 @@
 # frozen_string_literal: true
 
+require 'operation_response'
+
 class Project
   module Operation
     class CreateRemix
-      require 'operation_response'
-
       class << self
         def call(params:, user_id:, original_project:)
           response = OperationResponse.new
 
           validate_params(response, params, user_id, original_project)
-          remix_project(response, params, user_id, original_project)
+          remix_project(response, params, user_id, original_project) if response.success?
+          response
+        rescue StandardError => e
+          Sentry.capture_exception(e)
+          response[:error] = I18n.t('errors.project.remixing.cannot_save')
           response
         end
 
@@ -22,11 +26,9 @@ def validate_params(response, params, user_id, original_project)
         end
 
         def remix_project(response, params, user_id, original_project)
-          return if response[:error]
-
           response[:project] = create_remix(original_project, params, user_id)
 
-          response[:error] = I18n.t('errors.project.remixing.cannot_save') unless response[:project].save
+          response[:project].save!
           response
         end
 
@@ -43,6 +45,7 @@ def create_remix(original_project, params, user_id)
           params[:components].each do |x|
             remix.components.build(x.slice(:name, :extension, :content, :index))
           end
+
           remix
         end
       end
diff --git a/app/concepts/project/operation/update.rb b/app/concepts/project/operation/update.rb
index cfde67f70..3d2e48787 100644
--- a/app/concepts/project/operation/update.rb
+++ b/app/concepts/project/operation/update.rb
@@ -1,22 +1,25 @@
 # frozen_string_literal: true
 
+require 'operation_response'
+
 class Project
   module Operation
     class Update
-      require 'operation_response'
-
-      def self.call(params:, project:)
-        response = setup_response(project)
-
-        setup_deletions(response, params)
-        update_project_attributes(response, params)
-        update_component_attributes(response, params)
-        persist_changes(response)
+      class << self
+        def call(params:, project:)
+          response = setup_response(project)
 
-        response
-      end
+          setup_deletions(response, params)
+          update_project_attributes(response, params)
+          update_component_attributes(response, params)
+          persist_changes(response)
+          response
+        rescue StandardError => e
+          Sentry.capture_exception(e)
+          response[:error] ||= 'Error persisting changes'
+          response
+        end
 
-      class << self
         private
 
         def setup_response(project)
@@ -41,13 +44,13 @@ def validate_deletions(response)
         end
 
         def update_project_attributes(response, params)
-          return if response[:error]
+          return if response.failure?
 
           response[:project].assign_attributes(params.slice(:name))
         end
 
         def update_component_attributes(response, params)
-          return if response[:error]
+          return if response.failure?
 
           params[:components].each do |component_params|
             if component_params[:id].present?
@@ -60,14 +63,11 @@ def update_component_attributes(response, params)
         end
 
         def persist_changes(response)
-          return if response[:error]
+          return if response.failure?
 
           ActiveRecord::Base.transaction do
             response[:project].save!
             response[:project].components.where(id: response[:component_ids_to_delete]).destroy_all
-          rescue StandardError
-            # TODO: log error?
-            response[:error] = 'Error persisting changes'
           end
         end
       end
diff --git a/config/initializers/auth.rb b/config/initializers/auth.rb
index cd170d065..9b97cd4e3 100644
--- a/config/initializers/auth.rb
+++ b/config/initializers/auth.rb
@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 
 BYPASS_AUTH = ENV['BYPASS_AUTH'] == 'true'
-AUTH_USER_ID = ENV['AUTH_USER_ID'] if BYPASS_AUTH
+AUTH_USER_ID = ENV.fetch('AUTH_USER_ID', nil) if BYPASS_AUTH
diff --git a/config/initializers/sentry.rb b/config/initializers/sentry.rb
new file mode 100644
index 000000000..22f7cf011
--- /dev/null
+++ b/config/initializers/sentry.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+Sentry.init do |config|
+  config.dsn = ENV.fetch('SENTRY_DSN', nil) if Rails.env.production?
+  config.breadcrumbs_logger = [:active_support_logger]
+  config.environment = ENV.fetch('SENTRY_CURRENT_ENV', nil) || ENV.fetch('RAILS_ENV', nil)
+
+  config.traces_sample_rate = 0.5
+end
diff --git a/lib/operation_response.rb b/lib/operation_response.rb
index 024e33f97..53b0bdb90 100644
--- a/lib/operation_response.rb
+++ b/lib/operation_response.rb
@@ -2,9 +2,7 @@
 
 class OperationResponse < Hash
   def success?
-    return false unless self[:error].nil?
-
-    true
+    fetch(:error, nil).nil?
   end
 
   def failure?
diff --git a/spec/concepts/project/operation/create_remix_spec.rb b/spec/concepts/project/operation/create_remix_spec.rb
index 07e74d268..17dae5db7 100644
--- a/spec/concepts/project/operation/create_remix_spec.rb
+++ b/spec/concepts/project/operation/create_remix_spec.rb
@@ -33,7 +33,7 @@
 
     it 'returns success' do
       result = create_remix
-      expect(result.success?).to eq(true)
+      expect(result.success?).to be(true)
     end
 
     it 'creates new project' do
@@ -104,7 +104,7 @@
 
       it 'returns failure' do
         result = create_remix
-        expect(result.failure?).to eq(true)
+        expect(result.failure?).to be(true)
       end
 
       it 'returns error message' do
@@ -122,7 +122,7 @@
 
       it 'returns failure' do
         result = create_remix
-        expect(result.failure?).to eq(true)
+        expect(result.failure?).to be(true)
       end
 
       it 'returns error message' do
@@ -143,7 +143,7 @@
       end
 
       it 'returns failure' do
-        expect(create_remix.failure?).to eq(true)
+        expect(create_remix.failure?).to be(true)
       end
 
       it 'sets error message' do
diff --git a/spec/concepts/project/operation/create_spec.rb b/spec/concepts/project/operation/create_spec.rb
index afd19fa09..72e10a211 100644
--- a/spec/concepts/project/operation/create_spec.rb
+++ b/spec/concepts/project/operation/create_spec.rb
@@ -14,7 +14,7 @@
 
   describe '.call' do
     it 'returns success' do
-      expect(create_project.success?).to eq(true)
+      expect(create_project.success?).to be(true)
     end
 
     it 'creates a new project' do
@@ -57,7 +57,7 @@
       end
 
       it 'returns success' do
-        expect(create_project_with_content.success?).to eq(true)
+        expect(create_project_with_content.success?).to be(true)
       end
 
       it 'returns project with correct component content' do
@@ -71,15 +71,21 @@
         mock_project = instance_double(Project)
         allow(mock_project).to receive(:components).and_raise('Some error')
         allow(Project).to receive(:new).and_return(mock_project)
+        allow(Sentry).to receive(:capture_exception)
       end
 
       it 'returns failure' do
-        expect(create_project.failure?).to eq(true)
+        expect(create_project.failure?).to be(true)
       end
 
       it 'returns error message' do
         expect(create_project[:error]).to eq('Error creating project')
       end
+
+      it 'sent the exception to Sentry' do
+        create_project
+        expect(Sentry).to have_received(:capture_exception).with(kind_of(StandardError))
+      end
     end
   end
 end
diff --git a/spec/concepts/project/operation/update_default_component_spec.rb b/spec/concepts/project/operation/update_default_component_spec.rb
index 4c55207bc..e876abf55 100644
--- a/spec/concepts/project/operation/update_default_component_spec.rb
+++ b/spec/concepts/project/operation/update_default_component_spec.rb
@@ -18,7 +18,7 @@
       end
 
       it 'returns failure? true' do
-        expect(update.failure?).to eq(true)
+        expect(update.failure?).to be(true)
       end
 
       it 'returns error message' do
diff --git a/spec/concepts/project/operation/update_delete_components_spec.rb b/spec/concepts/project/operation/update_delete_components_spec.rb
index ad08160f3..c9b25c82e 100644
--- a/spec/concepts/project/operation/update_delete_components_spec.rb
+++ b/spec/concepts/project/operation/update_delete_components_spec.rb
@@ -34,7 +34,7 @@
 
       it 'deletes the correct component' do
         update
-        expect(Component.find_by(id: component_to_delete.id)).to eq(nil)
+        expect(Component.find_by(id: component_to_delete.id)).to be_nil
       end
     end
   end
diff --git a/spec/concepts/project/operation/update_invalid_spec.rb b/spec/concepts/project/operation/update_invalid_spec.rb
index 449faa2fd..6ec0968b6 100644
--- a/spec/concepts/project/operation/update_invalid_spec.rb
+++ b/spec/concepts/project/operation/update_invalid_spec.rb
@@ -28,7 +28,7 @@
   describe '.call' do
     context 'when updated project component is invalid' do
       it 'returns failure? true' do
-        expect(update.failure?).to eq(true)
+        expect(update.failure?).to be(true)
       end
 
       it 'does not amend any project properties' do
diff --git a/spec/concepts/project/operation/update_spec.rb b/spec/concepts/project/operation/update_spec.rb
index a0ea8a655..4fcc6277f 100644
--- a/spec/concepts/project/operation/update_spec.rb
+++ b/spec/concepts/project/operation/update_spec.rb
@@ -30,7 +30,7 @@
       let(:component_params) { [default_component_params, edited_component_params] }
 
       it 'returns success? true' do
-        expect(update.success?).to eq(true)
+        expect(update.success?).to be(true)
       end
 
       it 'updates project properties' do
@@ -54,7 +54,7 @@
       it 'creates component with correct properties' do
         update
         created_component = project.components.find_by(**new_component_params)
-        expect(created_component).not_to eq(nil)
+        expect(created_component).not_to be_nil
       end
     end
   end
diff --git a/spec/lib/operation_response_spec.rb b/spec/lib/operation_response_spec.rb
index faa9b59ca..7cf83903e 100644
--- a/spec/lib/operation_response_spec.rb
+++ b/spec/lib/operation_response_spec.rb
@@ -8,7 +8,7 @@
     context 'when :error not present' do
       it 'returns true' do
         response = described_class.new
-        expect(response.success?).to eq(true)
+        expect(response.success?).to be(true)
       end
     end
 
@@ -16,7 +16,7 @@
       it 'returns false' do
         response = described_class.new
         response[:error] = 'An error'
-        expect(response.success?).to eq(false)
+        expect(response.success?).to be(false)
       end
     end
   end
@@ -25,7 +25,7 @@
     context 'when :error not present' do
       it 'returns false' do
         response = described_class.new
-        expect(response.failure?).to eq(false)
+        expect(response.failure?).to be(false)
       end
     end
 
@@ -33,7 +33,7 @@
       it 'returns true' do
         response = described_class.new
         response[:error] = 'An error'
-        expect(response.failure?).to eq(true)
+        expect(response.failure?).to be(true)
       end
     end
   end
diff --git a/spec/models/component_spec.rb b/spec/models/component_spec.rb
index 9fd7812d9..ebb180b12 100644
--- a/spec/models/component_spec.rb
+++ b/spec/models/component_spec.rb
@@ -17,7 +17,7 @@
     describe 'validations' do
       it 'returns valid? false when name changed' do
         component.name = 'updated'
-        expect(component.valid?).to eq(false)
+        expect(component.valid?).to be(false)
       end
 
       it 'sets error message when name changed' do
@@ -29,7 +29,7 @@
 
       it 'returns valid? false when extension changed' do
         component.extension = 'txt'
-        expect(component.valid?).to eq(false)
+        expect(component.valid?).to be(false)
       end
 
       it 'sets error message when extension changed' do
diff --git a/spec/request/projects/index_spec.rb b/spec/request/projects/index_spec.rb
index 8bd7d526d..7c51c672d 100644
--- a/spec/request/projects/index_spec.rb
+++ b/spec/request/projects/index_spec.rb
@@ -30,7 +30,7 @@
     it 'returns users projects' do
       get '/api/projects'
       returned = JSON.parse(response.body)
-      expect(returned.all? { |proj| proj['user_id'] == user_id }).to eq(true)
+      expect(returned.all? { |proj| proj['user_id'] == user_id }).to be(true)
     end
   end