Senior Full-Stack Engineer · Founder of DrutoAI · NestJS · TypeScript · React · Node.js · Java/Spring 5+ years building production-grade backends, AI-powered products, and payment systems.

I'm a Senior Full-Stack Engineer with 5+ years of experience shipping end-to-end products — from REST APIs and databases to React frontends and cloud deployment. I specialize in TypeScript/NestJS backends and have a strong track record building AI integrations, payment gateways, and e-commerce platforms.

• 🔭 Engineering software at Sense & Respond Software LLC · Founder of DrutoAI
• 🌐 Portfolio: rifatbinsiraj.github.io/portfolio
• 🧠 Passionate about clean architecture, scalable APIs, and AI-driven products
• 🌍 Based in Dhaka, Bangladesh · Open to backend & full-stack roles
• 💬 Ask me about NestJS, Node.js, system design, payment integrations, and LLM apps
• 📊 Proven impact: 50% faster APIs · 60% fewer production bugs · 95% test coverage · 50,000+ active users served

Languages

Backend

Frontend

Databases & Cloud

Practices & Integrations

A full-stack, pay-as-you-go AI chat platform built for Bangladesh, with credit packages and real payments.

• Stack: NestJS · MongoDB · React + Vite · TypeScript · Tailwind · Capacitor (iOS/Android)
• Pluggable LLM provider (Claude / OpenAI / OpenRouter) switchable via a single env var
• JWT auth, Swagger docs, usage metering, credit billing, and bKash payment integration
• Real-time streaming responses with full Bangla language support
• Ships as both a web app and native mobile apps

🔗 Live: drutoai.com

An AI-driven platform for generating, running, and managing API test suites at scale.

• Stack: NestJS · Fastify · MongoDB · BullMQ · React · Material UI · ReactFlow · Monaco · AWS
• AI test generation via Claude, OpenAI & Gemini using the Vercel AI SDK and MCP
• Mock servers, API-collection management, and visual test-flow authoring

🔗 Live: web.e2etestautomation.com

Enforces API standards across an organization with automated linting and a live docs portal.

• Stack: Node.js · Express · NestJS · MongoDB · Redis · MCP · React Micro-Frontends
• Spectral-based CLI for OpenAPI linting and governance rule enforcement
• Micro-frontend architecture for the doc portal, governance, and pricing modules

🔗 Live: web.governance.dev

A collaborative defect-tracking tool with AI-assisted triage.

• Stack: NestJS Microservices · Anthropic AI · AWS SQS/KMS/SES · React · CodeMirror · Redis
• Drag-and-drop workflows, CodeMirror editors, Redis caching
• Fully containerized with Docker Compose

🔗 Live: app.snifferweb.com

An automated call center powered by conversational voice AI.

• Stack: NestJS · Fastify · MongoDB · React · Vite · Redux Toolkit · Tailwind
• Vapi Voice AI integration for natural automated calling
• ShurjoPay payment integration

🔗 Live: callcenter.drutoai.com

Personalized, AI-generated educational content and interactive learning.

• Stack: React · TypeScript · Vite · Tailwind · NestJS · Fastify · MongoDB
• Anthropic Claude powers adaptive lesson generation and interactive tutoring

🔗 Live: learn.drutoai.com

Eliminates manual payment reconciliation for Bangladesh mobile financial services.

• Stack: Android SMS capture · NestJS · Fastify · MongoDB · Zod validation
• Automatically parses and verifies bKash / Nagad / Rocket transactions from SMS
• Type-safe request validation and clean modular architecture

🔗 Live: pay.drutoai.com

A complete e-commerce platform with a customer storefront and admin panel.

• Stack: NestJS · MongoDB (Mongoose) · React + Vite · Redux Toolkit (RTK Query) · Tailwind
• JWT auth, AWS S3 image uploads, Dockerized with docker-compose
• Product catalog, cart, checkout, and order management

🔗 Live: shop.drutoai.com

Serverless microservices for company, timesheet, salary, payment, and finance management.

• Stack: AWS Serverless Microservices · DynamoDB Streams · Memcached · Pino
• Event-driven architecture with DynamoDB streams

🔗 Live: employee.associate360view.com

High-traffic travel and hotel-booking platform serving the Bangladesh market.

• Stack: Java · Spring Boot · Spring Data JPA · Spring Security · PostgreSQL · Flyway
• Elasticsearch-powered search across hotels, tours, and listings
• Kafka events, Firebase notifications, AWS S3, SurjoPay payments, Swagger-documented REST APIs
• 50% faster API response times via JPA query tuning and PostgreSQL indexing

🔗 Live: ghuddy.com

An AI-powered crypto trading bot that analyzes markets and makes decisions.

• Stack: NestJS · Binance API · Claude AI · Docker · Fly.io
• Combines technical indicators with LLM reasoning for trade decisions

Converts API collections across Postman, Swagger, OpenAPI, Insomnia, HAR, cURL, RAML, GraphQL, WSDL & AWS API Gateway.

npm install api-collection-converter

Node-native package converting PDF, Word, Excel, CSV, HTML, JSON, text & images to clean Markdown — built to significantly cut LLM token usage.

npm install files-to-markdown

Dependency vulnerability scanning and security auditing for Node.js projects — surfaces known vulnerabilities in your dependency tree and fits into CI/CD pipelines.

npm install vuln-guardian

Four more, same shape: scan → review → approve into a committed allowlist → gate CI on anything new.

Scans node_modules for preinstall/install/postinstall scripts — the #1 npm supply-chain attack vector — and gates CI on anything not explicitly reviewed and approved.

npm install --save-dev postinstall-guardian

Scans a git working tree (or just staged files, for a pre-commit hook) for leaked API keys and credentials before they hit history. Every output is redacted — it never writes a raw secret anywhere.

npm install --save-dev secrets-guardian

Scans node_modules for dependency licenses and gates CI on copyleft (GPL/AGPL/LGPL/SSPL) or unrecognized licenses that aren't explicitly approved.

npm install --save-dev license-guardian

Scans .github/workflows for GitHub Actions referenced by a mutable tag/branch instead of a pinned commit SHA — the vector behind real 2025 supply-chain compromises — and auto-pins them.

npm install --save-dev actions-guardian

Catches backend crashes, HTTP 5xx responses, and error-log lines and auto-files a ticket in Jira or GitHub Issues — with fingerprint-based dedup so the same defect doesn't spam a new ticket every time it recurs.

npm install crashrelay

Tiny, dependency-free browser snippet that catches window.onerror / unhandledrejection and reports them to a crashrelay ingestion endpoint.

npm install crashrelay-browser

Full-Stack Engineer — Sense & Respond Software LLC · Nov 2022 – Present Architected 8+ production applications serving 50,000+ users. Cut API latency 40% and production bugs 60%. Lead architecture decisions and mentor 3 junior engineers.

Software Engineer — Ghuddy Limited · Jul 2021 – Nov 2022 Built Java/Spring Boot microservices with Elasticsearch and Kafka for a high-traffic travel platform. Reduced API response time 50%; achieved 95% test coverage.

Founder & Lead Engineer — DrutoAI · 2026 – Present Built and launched a live, monetized AI chat platform serving users across Bangladesh.

🎓 B.Sc. in Computer Science & Engineering — Rajshahi University of Engineering & Technology (RUET)

I'm open to Full-Stack & Backend Engineering opportunities. Let's build something great together.

⭐️ From Rifat024