Projects and Portfolio — Suman Dey (imsumandey), Senior Technical Lead

Multi-tenant project management SaaS for software teams with AI built into the core product. Covers work item tracking, sprint planning, backlog management, time tracking, and team workload.

• Project-scoped AI assistant with RAG over codebases and work history, tool calling, SSE streaming, and persistent conversation memory via vector similarity search
• Vector search via pgvector with HNSW indexing — semantic search without LLM calls at query time, latency under 100ms
• AI-powered estimation, tag suggestions, sprint goal generation, and intelligent Excel import from Jira, Trello, or custom spreadsheets
• OpenAPI-first codegen: backend generates full API spec on every change, frontend consumes auto-generated TypeScript types and TanStack Query hooks
• Background job architecture with BullMQ and Redis — retry logic, distributed locking, concurrency control, automated recovery

Enterprise recruitment platform managing the full hiring lifecycle for HR teams. Covers resume bank with skill-based search, AI-assisted job posting, candidate pipeline tracking, recruiter leaderboard, and audit dashboard.

• AI-powered resume parsing using LangChain and OpenAI with document parsing across PDF, DOCX, and other formats — 92% accuracy, 60% reduction in manual operations
• PostgreSQL optimised with trigram indexing for sub-80ms search on over one million records
• Public-facing candidate pages, company and client management, deployment and recruiter reports
• Multi-environment GitHub Actions CI/CD pipelines (dev, quality, production) with self-hosted runners

Full-stack e-commerce platform with a customer-facing storefront, a separate internal admin console, and a shared backend API built as a pnpm monorepo.

• Separate auth domains for admin users and customers, product catalogue management, Razorpay payment integration
• OpenAPI-driven codegen pipeline generates TypeScript clients for both the storefront and admin independently
• Atomic deployments from a pnpm monorepo: builds three apps, packs into a single tarball, staged swap with automatic rollback, PM2 reload, health check loop
• Cloudflare Tunnel for HTTPS routing with no NGINX in the path

Consumer home management app covering cleaning routines, task streaks, rewards, family management, and AI-powered recipe search. Cross-platform across Web, Android, and iOS using a WebView architecture.

• AI assistant with tool calling for routine and task management
• Recipe search uses LangChain, OpenAI, and a multi-provider image pipeline with Cloudflare R2 CDN
• JWT auth with Google and Apple OAuth
• Android and iOS apps delivered as WebView wrappers

Enterprise project management platform covering the full project lifecycle: timesheet management, project tracking, scrum boards, WBS, dashboards, and reporting.

• AI features via LangChain and OpenAI, OCR for document processing
• Real-time updates via Socket.io, internationalisation with i18next
• Azure AD, JWT, and local auth via Passport.js
• Multi-environment CI/CD pipelines (sandbox, development, quality, production)

Roktomitra (also known as Raktamitra Ramnagar) is a blood bank management system built as a social platform connecting blood donors with those in need across the Ramnagar region, West Bengal. Features an Instagram-like feed for blood donation requests with photos, urgency levels, and location tagging. Recognised and shared by Ramnagar Rao High School and local community organisations. Available on Google Play Store.

• Location-based donor discovery using MongoDB geospatial queries and blood type compatibility matching — helping common people find donors in emergencies
• Instagram-like social feed for blood donation requests with photos, urgency levels, and location tagging
• Admin dashboard with smart donor matching, user management, and MongoDB aggregation pipelines
• Firebase Auth for secure authentication, AWS S3 for image storage
• Recognised by Ramnagar Rao High School and shared by local community groups as a public service app — 'রক্ত দিন, জীবন বাঁচান' (Give blood, save lives)
• Android app published on Google Play Store by MonsterTechno (com.monstertechno.raktamitra)

Cross-platform social app with real-time messaging, stories with image cropping and editing, a game and scoring system, push notifications, and virtual scrolling for performant feed rendering.

• Real-time messaging via Socket.io
• Stories with image cropping and editing using Konva.js
• Push notifications via OneSignal
• Android app delivered as a WebView wrapper
• Payment integration for premium features

Digital lab notebook system for research data management with complex data validation, audit trails, advanced search and filtering, and secure document sharing with version control.

• Complex data validation and audit trail systems
• Advanced search and filtering on research datasets
• Secure document sharing with version control

Music streaming platform with a modern audio player, Firebase Authentication with Google Sign-in, Firestore database, and Razorpay payment gateway for subscription and premium content.

• Firebase Authentication with Google Sign-in
• Razorpay payment gateway for subscriptions
• Deployed on Vercel with automated CI/CD

SAP business process automation platform with 15 interconnected modules. Built data visualisation dashboards processing millions of records.

• 15 interconnected modules built on OpenUI5 and Neptune Planet 9
• Authentication flows and multi-application launchpads
• Data visualisation dashboards processing millions of records

Interactive digital magazine platform rendering PDF content as a page-flip experience in the browser, with a unique visitor counter using cookie and IP-based deduplication.

• PDF rendering via react-pageflip and pdfjs-dist
• Unique visitor counter with cookie and IP-based deduplication backed by Firebase Firestore
• Vercel Analytics integration