Projects

Systems I’ve designed, built and shipped, plus the open source work behind them.

• 6 apps · 7 services

  control.store.app/stores

  Multi-tenant SaaS Platform

  Turborepo + Bun monorepo orchestrating 6 applications and 7 services for multi-tenant ecommerce

  • Turborepo
  • Bun
  • Next.js
  • Hono
  • Caddy
  • ACME
  • Baileys
  • PostgreSQL
  • Docker
  • PM2
  • GitHub Actions

  How it’s built

  • Architected a Turborepo + Bun monorepo with 6 applications; designed a two-system platform separating SaaS Control Plane (tenant lifecycle, auth, billing) from Ecommerce Runtime (multi-tenant storefront).
  • Built automated store provisioning pipeline with env config generation, Caddy reverse-proxy management, SSL via ACME/Let's Encrypt, and health checks with real-time status tracking through deployment states.
  • Implemented a shared-container Next.js storefront serving all merchants via hostname-based tenant resolution with product catalog, checkout, customer auth, order tracking, and theme customization.
  • Integrated payment gateway (idempotent checkout), WhatsApp marketing (Baileys with per-store session isolation), and voice marketing (IVR).
  • Built modular REST API (Hono + Bun, DDD) with 35 feature modules; authored 3 production Dockerfiles and Docker Compose orchestrating 7 services with health checks and persistence.
  • Managed production deployment via PM2 and GitHub Actions CI/CD.
• Zero data loss offline

  pos.local/table-7

  Offline-First Restaurant POS System

  Production-grade POS with zero data loss during network outages and exactly-once order sync

  • Next.js
  • Dexie.js
  • IndexedDB
  • PostgreSQL
  • BullMQ
  • Redis
  • Web Bluetooth
  • Canvas 2D
  • Zustand
  • Recharts
  • Docker
  • PM2

  How it’s built

  • Architected and developed a production-grade offline-first Point-of-Sale application enabling uninterrupted cashier operations during network outages with zero data loss via IndexedDB local persistence.
  • Engineered a dual-database sync pipeline using Dexie.js (client-side write-ahead log) and PostgreSQL (canonical store), with BullMQ + Redis background worker ensuring exactly-once order processing via idempotency-key deduplication (24h TTL + DB constraints).
  • Integrated Web Bluetooth API for direct ESC/POS thermal receipt printer communication with automatic GATT discovery and Unicode-to-raster conversion using Canvas 2D API with Floyd-Steinberg dithering for non-Latin scripts (Bengali, Arabic, CJK).
  • Implemented PIN-based RBAC authentication (4 roles) with Redis-backed server sessions and 12-hour offline cache; designed a Zustand cart engine with per-line/order discounts, variants, modifiers, and category-level taxes.
  • Built admin dashboard with menu/staff CRUD, table management, analytics via Recharts, dynamic CSS theming, and keyboard-driven command palette; deployed via Docker Compose + PM2 with separate web/worker processes.