I build reliable backend platforms, distributed systems, and scalable product infrastructure.
- PH Mailer — Centralized email platform with BullMQ, Redis queues, and AWS SES. Serves 5 internal teams, 197K+ emails sent.
- PH Auth Service — Multi-tenant OIDC identity platform in Go with PKCE, TOTP MFA, and session revocation.
- PH Bootcamp Platform — Full-stack LMS with DRM video streaming, tokenized bKash payments, and QR attendance. 13K+ leads, 898+ active users.
- Skill Mapper — Assessment engine with state machine lifecycle, real-time leaderboards, and 5-tier XP ranking. 5K+ enrolled students.
- Payment Service — Unified payment orchestration in Go for Stripe, bKash, and SSLCommerz with idempotent webhook handling.
- SpeakSail — Language-learning marketplace with live video tutoring, Socket.IO messaging, and multi-currency billing. 90+ API routes, 27 database models.
| Domain | Technologies |
|---|---|
| Backend & APIs | Go · Node.js · TypeScript · Express · REST · OpenAPI |
| Data & Storage | PostgreSQL · MongoDB · Redis · ClickHouse |
| Security & Identity | OIDC · OAuth2 · ZITADEL · TOTP MFA · Rate Limiting · CSP / CSRF |
| Infrastructure | Docker · GitHub Actions · Linux |
| Frontend | React · Next.js · Nuxt · Tailwind CSS · TanStack Query |
- Go Middleware Kit — Lightweight, zero-dependency Go utilities for rate limiting and resilient HTTP middleware.
Open to backend architecture, platform engineering, and distributed systems roles.