Harsh
vardhan

I'm a Senior Software Engineer with 3+ years of experience building backend systems and full-stack applications that perform under pressure. Currently at Geeks2Connect Infotech in Jaipur, where I architect services that handle 10,000+ concurrent users without breaking a sweat.

My toolkit is Python-first — FastAPI is home — but I'm equally at ease in the Node.js ecosystem with NestJS and Express. On the frontend, I build with React and Next.js; on mobile, React Native for both iOS and Android.

I care deeply about clean architecture, measurable performance, and the humans on my team. I've mentored junior developers and led backend squads — because great engineering is as much about people as it is about code.

• →Architected FastAPI + PostgreSQL backend services serving 10,000+ concurrent users using async patterns and connection pooling
• →Engineered secure REST APIs with JWT + RBAC, eliminating unauthorized access incidents entirely
• →Optimized PostgreSQL queries with strategic indexing — 60% reduction in API response times
• →Redis caching layer reduced DB load by 40%, accelerating feed generation
• →Deployed on AWS (EC2, S3, SES) with Docker; maintained 99.9% uptime via CI/CD pipelines
• →Mentored 3 junior developers; accelerated team delivery by 25%

• →Built and maintained backend microservices with Node.js, NestJS, Express.js for CRM, HRMS, and profile management (5,000+ users)
• →Designed relational (PostgreSQL, MySQL) and NoSQL (MongoDB) schemas with query optimization
• →Maintained 95%+ code quality through unit testing and TDD practices

A complete social platform with 30+ REST endpoints covering auth, profiles, posts, likes, comments, follows, and real-time messaging via WebSockets. Sub-100ms response times achieved through advanced PostgreSQL indexing and Redis caching.

• ·GDPR-compliant security: SQL injection prevention, data encryption
• ·API contracts designed for seamless web + mobile client integration
• ·Real-time messaging via WebSocket connections

Multi-platform sports venue booking system with dynamic pricing engine, real-time availability tracking, and full booking lifecycle management. Led a team of 5 developers across backend, mobile, and web.

• ·Comprehensive RBAC for players, venue owners, and admins
• ·React Native mobile + Angular web applications
• ·AWS S3 media storage, EC2 hosting with Docker containers

Enterprise CRM with modular NestJS backend, dependency injection architecture, real-time notifications, and task assignment engine serving 1,000+ users. Led backend team of 4 engineers.

• ·Modular architecture with clean dependency injection patterns
• ·Real-time notification system and task assignment engine
• ·CRM workflow automation for 1,000+ enterprise users