🚀 Status: Available for architectural consulting, system design, and senior engineering roles.
I architect and deliver high-performance, scale-ready full-stack applications backed by robust, low-latency, and highly available systems. Over my career, I've specialized in designing unified API adapters, real-time message streams, POS database connectors, and cloud-native multi-tenant ecosystems.
📧 Email Me • 💼 LinkedIn • 🌐 Portfolio
Verified production achievements across enterprise deployments:
| Metric | Target | Solution Strategy |
|---|---|---|
| 🌐 Uptime Achieved | 99.9% |
Implemented active-passive clustering, health check indicators, and failover routing. |
| 📈 Client Growth | +35% |
Drove user expansion via reliable Otter POS aggregation webhooks & scalable backend schemas. |
| ⚡ Latency Reduction | -400ms |
Optimized query plans, customized indexes, set up Redis caching layers, and tuned Next.js SSR. |
| 🚀 Systems Deployed | 12+ |
Deployed production-ready services on AWS utilizing Docker containers & automated CI/CD. |
- Primary Languages: JavaScript (ES6+), TypeScript, Python
- Runtimes & Frameworks: Node.js, Express.js, Django, Django REST Framework, FastAPI
- Messaging & Pub/Sub: Django Channels, WebSockets (sub-100ms async updates), Redis Pub/Sub, Celery queue scheduling
- Caching & Pipelines: Redis cache layers, multi-threaded background workers, automated database auditing connectors
- Frontend Frameworks: Next.js (App Router, Server Components), React.js, Redux Toolkit
- Mobile Development: React Native, Expo Router, Shopify Flash-List virtualized performance rendering
- Cloud & OS: AWS (EC2, S3, VPC), DigitalOcean, Linux servers, Nginx (Reverse Proxy/SSL), Gunicorn, Daphne, PM2
- Containers & Versioning: Docker, Git, CI/CD pipelines (GitHub Actions)
📦 BDPayments v1.0.3
Centralized payment gateway abstraction library.
- Problem Solved: Decoupled Stripe, SSLCommerz, bKash, and Nagad into a lazy-loaded provider interface.
- Impact: Unified charge, refund, and retrieval actions into a clean, type-safe API for Node.js developers.
- Tech Stack: TypeScript, Node.js, Stripe, SSLCommerz API, bKash SDK.
📦 BDDeliveries v1.0.0
Centralized delivery gateway abstraction wrapper.
- Problem Solved: Normalizes delivery creation, updates, tracking, and cancellations across Pathao, Steadfast, and Paperfly couriers.
- Tech Stack: TypeScript, Node.js, Pathao Webhooks, Courier APIs.
📦 Express Controller Sets 2.5k+ Installs
Boilerplate router control framework for Node.js/Express.js.
- Problem Solved: Minimizes route boilerplate. Instantiates database schemas directly into validated REST endpoints.
- Impact: Supports Mongoose validation, express-controller-sets-router, and instant S3 file uploads.
- Tech Stack: Node.js, Express, MongoDB, AWS S3 API.
🌐 Radius ISP Billing System 18+ Stars
Enterprise Billing & Automation for Internet Service Providers.
- Features: Integrates with Mikrotik API for bandwidth controls and radius server profiles. Automates invoices and ledger updates.
- Tech Stack: Python, Django, Celery, Mikrotik API, PostgreSQL, Redis.
High-fidelity PDF document rendering engine.
- Features: Compiled Jinja2 templates into HTML schemas, then printed high-fidelity PDFs via wkhtmltopdf compilation.
- Tech Stack: Python, Django, Jinja2, Pdfkit, wkhtmltopdf.
If you are looking to build highly available distributed systems, integrate real-time operations, optimize database queries, or bootstrap a modern React/Next.js/React Native application:
- Email: smsabbirm@gmail.com
- LinkedIn: linkedin.com/in/sabbirmahmudzim
- GitHub: github.com/sabbir-mahmud
