Nayan Kunwar
Backend Engineer with 2+ years of experience building scalable backend systems
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About
Backend Engineer with 2+ years of experience building scalable backend systems using Node.js, TypeScript, PostgreSQL, MongoDB, Redis, Kafka, and Docker. Experienced in REST APIs, event-driven architecture, payment gateway integrations, distributed systems, vector databases, Retrieval-Augmented Generation (RAG), and LLM API integration. Hands-on experience building Agentic AI systems using LangChain and LangGraph, including tool calling, workflow orchestration, and AI-powered backend capabilities.
Experience
Backend Developer at Nexzem Technologies (2025-12 – 2026-06)
- Developed scalable backend services using Node.js, TypeScript, PostgreSQL, and Prisma.
- Implemented event-driven workflows using Apache Kafka and background workers.
- Built Redis caching and BullMQ-based asynchronous job processing.
- Developed Stripe Connect integrations including onboarding, transfers, payouts, and webhooks.
- Designed APIs, database schemas, and optimized query performance.
Technology Executive - Backend Developer at Pearl Organisation (2024-07 – 2025-08)
- Built REST APIs using Node.js, Express.js, MongoDB, and PostgreSQL.
- Built AI-powered backend services using OpenAI and Google Gemini APIs for summarization, and content generation.
- Improved performance through indexing, caching, and query optimization.
- Integrated Razorpay, Cloudinary, and Nodemailer services.
Backend Developer Intern at CodeJi Info Tech PVT LTD (2023-06 – 2023-11)
- Developed a real-time chat application using Socket.io, Node.js, and MongoDB.
- Implemented JWT-based authentication and authorization.
- Built APIs and middleware for messaging and user management.
Education
Master Of Computer Application in MCA – Shri Guru Ram Rai University (2021 – 2023)
Bachelor Of Science in BSc – Hemvati Nandan Bahuguna Garhwal University (2018 – 2021)
