Backend-focused Staff Engineer with 7+ years of experience designing scalable distributed systems, platform services, developer tooling and reusable backend infrastructure.
I primarily work with TypeScript, NestJS and Node.js, with strong interest in:
- System Design
- Distributed Systems
- Authentication & Authorization
- Scheduling Infrastructure
- Platform Engineering
- Developer Experience
Currently exploring:
- Advanced System Design
- Event-Driven Architectures
- High-scale backend patterns
- Scalable backend systems
- Multi-tenant platform architecture
- Open-source npm packages & developer tooling
- Authentication systems using JWT, HMAC signing and rotating CSRF strategies
- Appointment scheduling infrastructure inspired by platforms like Cal.com
- Healthcare & workflow integrations
Zero-trust authentication for Node.js microservices using HMAC-signed JWT request envelopes.
Features:
- 🔐 Request authenticity and integrity verification
- ⏱️ Short-lived signed tokens
- 🔄 Replay attack protection with pluggable nonce stores
- 🧩 Express, NestJS and Fastify integrations
- ⚡ Zero runtime dependencies
- 📘 Full documentation and security model
🔗 GitHub: https://github.com/Manik3112/serviceguard-stack
📦 npm: https://www.npmjs.com/package/serviceguard-stack
- 🛡️ Built ServiceGuard Stack — an open-source zero-trust authentication library for Node.js microservices
- 📅 Designed multi-tenant scheduling infrastructure supporting thousands of calendars and bookings
- 🔐 Built authentication platforms handling millions of secure requests daily
- 🚀 Designed reusable backend platforms and internal SDKs adopted across multiple services
- 🏥 Built Smart EMR — NHA Hackathon winning healthcare workflow platform
Building reliable systems, reusable platforms, and open-source tools that make backend engineering simpler.