Hey there, I'm Shahadath Hossen Sajib (Sajib) — Full Stack Engineer, backend-focused, who builds scalable APIs, real-time systems, and AI-powered applications with TypeScript, React, Next.js, Node.js, NestJS, and Python.
I design high-performance RESTful APIs, real-time applications, and event-driven architectures, and ship them end-to-end — from data modeling through production deployment. Most of my work sits at the intersection of microservices, real-time features, and AI integration (RAG, tool calling, document retrieval).
- 🗄️ Data layers: PostgreSQL, MongoDB, Redis — modeled with Prisma, Drizzle, and Mongoose
- ⚡ Real-time & queues: Socket.IO, WebRTC, BullMQ for live updates and background workloads
- 🤖 AI/LLM: OpenAI API, Ollama, RAG pipelines, and vector search for intelligent features
- 🐳 DevOps: Docker, GitHub Actions CI/CD, AWS (EC2 & S3), Nginx, and Caddy on Linux VPS
- 🤝 Open to collaboration on full stack, backend-heavy, or AI-integrated work
- 📧 Email: shahadathhossensajib732@gmail.com
- 📄 Resume: https://drive.google.com/file/d/1dtZCEgZyof-qrUreeVpXDlOovosegpuf/view
| Category | Tools & Technologies |
|---|---|
| Languages |    |
| Frontend |   |
| Backend |     |
| Databases |    |
| ORM / ODM |    |
| Messaging & Real-time |    |
| AI & LLM |     |
| Cloud & DevOps |      |
Backend Developer — Digital Pylot (Feb 2026 – Present) · Dhaka, Bangladesh · On-site
- Building a large-scale CRM & dynamic CMS platform on a microservices architecture across backend, AI, and deployment
- Shipped a fully customizable CMS (themes, layouts, pages, dynamic content with no code changes) and a custom RAG chatbot with tool calling and document retrieval
- Built role-based notifications and dynamic configuration that power complex business workflows
- Run production deployments on Linux VPS with Nginx, SSL, and CI/CD across services
Backend Developer — Softvence Agency (Jul 2025 – Feb 2026) · Dhaka, Bangladesh · On-site
- Built an Uber-style logistics platform — live tracking, dynamic routing, multi-party coordination, and weather-aware routing
- Engineered a payment engine for subscriptions, promo codes, and rule-based payouts, plus HR workflows with payroll automation
- Delivered AI automation for candidate evaluation, interview generation, and analytics
- Owned PostgreSQL schemas (Prisma/Drizzle) and AWS EC2 + S3 infrastructure end-to-end
Web Developer — Monster Studio (Aug 2024 – Apr 2025) · Chattogram, Bangladesh · On-site
- Contributed across a large monorepo powering 20+ production websites
- Built an AI-powered document assistant with retrieval-based, context-aware responses
- Developed internal tools (custom CMS, creator utilities) with external API integrations
- Led a frontend team through code reviews and strengthened reliability with unit tests
