I'm a full-stack engineer who ships end-to-end products — the kind with real users, real payments, and real infrastructure. My work spans from Go/Rust desktop vaults to production SaaS platforms running on PM2 behind Cloudflare. I don't stop at "it works on my machine": I handle the payment flows, the SMTP deliverability, the race conditions, and the auto-update signing pipelines.
name: Musfiqur Rahman Saimon
role: Full-Stack Product Engineer
location: Bangladesh
focus: Shipping complete, production-grade products
philosophy: "Paper-trade it, test it, then deploy it"
currently_building: AI-powered tooling & agent integrations (MCP)| Project | What it does | Stack |
|---|---|---|
| 🔐 AHS Vault | Zero-knowledge biometric vault — AES-256-GCM chunked storage unlocked by paired phone / WebAuthn | Go Rust/Tauri React PWA Kotlin |
| 📊 BritCRM | Self-hosted all-in-one CRM with LiveKit meetings, team chat, billing + MCP server for AI agents (live in production) | Next.js 16 Socket.io Prisma LiveKit |
| 💳 BlackDesck | Consultation platform with Stripe Connect payouts & risk-based 3DS checkout | Laravel Inertia React Stripe |
| 📈 BritTrade AI | Crypto signal engine with automated Binance futures execution, paper/live parity & Android app | Node.js CCXT Capacitor Kotlin |
| 🎬 BritTube | AI video generation pipeline — script → footage → TTS → subtitles → MP4, with public API & MCP server | FastAPI MoviePy Next.js MCP |
| 🎰 WinyPay Client | Gaming platform with seamless-wallet integration & custom payment gateway | Next.js 15 Express Prisma |
| ✉️ MailSender | Postal-style multi-tenant MTA infrastructure — DKIM/SPF automation, warmup engine, 100k/day design | TypeScript SMTP PostgreSQL Redis |
| 🎯 LeadHunter | B2B lead-gen platform — stealth scraping queue, segmented newsletters, HMAC tracking pixels | Puppeteer SQLite Stripe |
Deep-work areas: Payment integrations (Stripe/PayPal · idempotent webhooks · 3DS/SCA) · Email infrastructure (SMTP relays · DKIM/SPF · warmup · deliverability) · Realtime systems (Socket.io · LiveKit SFU) · Desktop apps (Tauri/Rust · signed auto-updaters) · AI agent surfaces (MCP servers)
 |
 |
|---|
Self-hosted stat cards computed from live GitHub API data — no third-party widgets, never rate-limited, always renders.
➜
➜
➜
Every repo in my profile has a documented engineering story — real bugs found, real fixes shipped:
- Race conditions caught in live capital checks before they cost money
- Idempotent payment recording so webhooks never double-charge
- Signed update pipelines that survive trust-chain rotations
- SMTP reputation strategy separating transactional from bulk mail
Browse any repository — each README documents the challenges faced and how they were solved.
