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Backend engineer specializing in Node.js/Express webhook infrastructure, multi-tenant SaaS systems, and RAG-powered AI applications. I build secure, event-driven REST APIs using queues, Redis, MySQL, and strong authentication/authorization patterns. I focus on production-ready backend engineering—JWT/RBAC, encryption and signing, queue reliability with retries and dead-lettering, and scalable system design—often improving AI retrieval quality and deployment reliability across multiple client environments.…Backend engineer specializing in Node.js/Express webhook infrastructure, multi-tenant SaaS systems, and RAG-powered AI applications. I build secure, event-driven REST APIs using queues, Redis, MySQL, and strong authentication/authorization patterns. I focus on production-ready backend engineering—JWT/RBAC, encryption and signing, queue reliability with retries and dead-lettering, and scalable system design—often improving AI retrieval quality and deployment reliability across multiple client environments.

KOUSHIK D SHET

Back-End Developer, Web Developer, Programmer, +3

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Backend engineer specializing in Node.js/Express webhook infrastructure, multi-tenant SaaS systems, and RAG-powered AI applications. I build secure, event-driven REST APIs using queues, Redis, MySQL, and strong authentication/authorization patterns. I focus on production-ready backend engineering—JWT/RBAC, encryption and signing, queue reliability with retries and dead-lettering, and scalable system design—often improving AI retrieval quality and deployment reliability across multiple client environments.…Backend engineer specializing in Node.js/Express webhook infrastructure, multi-tenant SaaS systems, and RAG-powered AI applications. I build secure, event-driven REST APIs using queues, Redis, MySQL, and strong authentication/authorization patterns. I focus on production-ready backend engineering—JWT/RBAC, encryption and signing, queue reliability with retries and dead-lettering, and scalable system design—often improving AI retrieval quality and deployment reliability across multiple client environments.

Available to hire

Backend engineer specializing in Node.js/Express webhook infrastructure, multi-tenant SaaS systems, and RAG-powered AI applications. I build secure, event-driven REST APIs using queues, Redis, MySQL, and strong authentication/authorization patterns.

I focus on production-ready backend engineering—JWT/RBAC, encryption and signing, queue reliability with retries and dead-lettering, and scalable system design—often improving AI retrieval quality and deployment reliability across multiple client environments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Work Experience

Backend Developer Intern at Sash Info Services Pvt Ltd

March 1, 2026 - June 30, 2026

Developed a production RAG chatbot for EduCtrl using Node.js, GPT-4o-mini, and pgvector, exposing 15+ REST APIs and enabling automated Level-1 support resolution with a Socket.IO human-escalation fallback. Resolved a production-blocking deployment issue across multiple client instances by debugging cross-stack integration between Laravel and Node.js and implementing runtime configuration injection to restore service the same day. Improved retrieval accuracy for the IIFLS assistant by tuning chunk sizing/overlap and building an automated web crawler to keep a dynamic knowledge base updated across 50+ documentation pages.