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Kingshuk Sanyal

@kingshuksanyal

Message

I build scalable Node.js backends, APIs, microservices, and AWS cloud applications.

India

Message

I've built and scaled backend systems at Appycodes for products including Bloc Ad-Manager, Zonely, Ariso, and Creoate. My work spans NestJS, Fastify, Node.js, TypeScript, PostgreSQL, Redis, AWS, and event-driven services—improving platform efficiency by 40%, supporting 500+ concurrent users at 99.9% uptime, and reducing delivery latency by 35%.

I also lead code reviews, mentor engineers, define API contracts, and strengthen delivery through CI/CD, CloudWatch monitoring, Swagger documentation, and Jest test suites. Earlier, I built RESTful APIs at Technogleam and delivered independent backend contracts using PostgreSQL and AWS.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer

Current

Appycodes

Jan 2021 - Present (5 years 7 months)

Mentored a team of 5 engineers and contributed to multiple enterprise projects, including a real-time bidding platform and a chat/calling platform, achieving significant performance improvements.

TypeScript NestJS Fastify PostgreSQL Redis AWS Docker CI CD Jest Swagger

Backend Developer

Technogleam

Nov 2020 - Jan 2021 (2 months)

Built high-performance RESTful APIs using Node.js, Express.js, and Sequelize, and collaborated with frontend developers to define API contracts.

Node.Js Development Sequelize REST APIs

Freelance Backend Developer

Independent

Dec 2019 - Oct 2020 (10 months)

Took on independent backend contracts to build robust logic routines, expanding hands-on familiarity with PostgreSQL data constraints and AWS cloud instances.

PostgreSQL AWS

Software Trainee Engineer

Carvewing Solution

Feb 2019 - Nov 2019 (9 months)

Built an automated log monitoring tool that analyzed runtime exceptions and sent real-time notifications, and gained foundational experience across the SDLC.

Git Testing SDLC