Md Nasim Sheikh
Lead Full-Stack Web Engineer
nasim@nasimstg.dev · Bangladesh (UTC+6) · Remote-first · linkedin.com/in/nasimstg · github.com/nasimstg · nasimstg.dev
Technical Skills
Languages: TypeScript, JavaScript, Python, SQL Frameworks & Libraries: React, Next.js, Node.js, Tailwind CSS, Socket.IO Databases: MongoDB, PostgreSQL, Firestore, Redis Cloud & DevOps: Firebase, Vercel, GitHub Actions, Docker, Cloudflare Integrations & Services: Stripe, OAuth 2.0, Payment Processing
Professional Experience
Leading engineering on the AzoozGAT quiz and learning platform. Architecture, performance work, payment integration, and team direction. Now leading a ground-up rewrite onto a self-hosted PostgreSQL + Redis architecture, built for 5x subscriber growth.
- 30% bundle size reduction, 19% fewer database operations per session, and 24% faster page load times
- Built RBAC and payment-gated access from the ground up
- Authored the system architecture, data model, and API contracts for a full platform rewrite off Firebase onto self-hosted PostgreSQL + Redis
- Designed a 5-service architecture (web, Telegram bot, PDF worker, notifier worker, realtime gateway) with a phased Firestore-to-Postgres migration strategy
Delivered 50+ full-stack MVPs across Next.js, Firebase, and TypeScript stacks with a 90%+ client satisfaction rate, including Budee.io, a PPC budget platform with Google Ads and Meta Ads integrations.
- Hardened payment processing workflows by implementing idempotent requests, strict input validation, and clear error states.
- Optimized slow queries and trimmed redundant database calls on hot payment paths to improve overall API latency.
- Built and QA-tested internal UI features across browsers while maintaining technical documentation for REST endpoints.
Selected Projects
- Built a retrieval-grounded site assistant using a lexical intent router and BM25 over Groq Llama 3.1
- Hardened against prompt injection; 11 factual intents at zero LLM calls, 0 KB JS, $0/month
- Built a zero-dependency Go CLI for encrypted .env synchronization using AES-256-GCM and X25519 ECDH.
- Shipped 16 stable releases across 5 package managers (Homebrew, Scoop, npm, AUR, Nix).
- Built an open-source gamified learning platform with ReactFlow, Zustand, and a Supabase backend
- Implemented theme-aware Dagre auto-layout and a GitHub-backed community curation pipeline
- Fine-tuned a 4-bit-quantized Qwen2.5-1.5B model via QLoRA for offline Banglish cyberbullying detection
- Improved classification accuracy from 44% to 87% (F1 0.80) while targeting 3-4GB RAM edge devices
Education
Coursework across data structures, algorithms, operating systems, databases, computer networks, and software engineering.