● Open to Work

kingshuk_sanyal

Backend Developer | Node.js | TypeScript | REST APIs | Microservices | AWS
Siliguri, West Bengal, India

About Me

Backend developer with 3+ years of hands-on experience building, maintaining, and scaling reliable server-side applications using JavaScript, Node.js, TypeScript, and AWS cloud environments. Highly capable across the entire application lifecycle—from designing scalable RESTful APIs to optimizing relational/NoSQL database performance, setting up service monitoring, and ensuring overall system reliability. Experienced collaborating closely with front-end developers to map API contracts while implementing effective security protocols and automated testing suites.

Skills & Technologies

Node.jsTypeScriptJavaScript (ES6+)PHPNestJSFastifyExpress.jsServerless FrameworkPostgreSQLMySQLMongoDBRedisPrismaSequelizeGraphQLRESTful APIsMicroservicesEvent-Driven ArchitectureJestAWS EC2AWS S3AWS LambdaAWS SQSAPI GatewayCloudWatchDockerCI/CDDigitalOceanGitGitHubVS CodepgAdminJiraAgile/Scrum MethodologiesSwaggerPostman

Work Experience

Backend Developer

Appycodes
Jan 2021NOW

Led a team of 5 engineers on enterprise projects, conducting code reviews and guiding juniors. Developed and optimized multiple platforms including Bloc Ad-Manager (NestJS, TypeScript, PostgreSQL) boosting efficiency by 40%, Zonely (Fastify, Redis) managing 500+ users at 99.9% uptime with 35% latency reduction, and Creoate (Node.js, AWS Lambda, MySQL) eliminating 70% manual shipping. Owned CI/CD pipelines, AWS CloudWatch monitoring, Swagger API docs, and Jest test suites.

Backend Developer

Technogleam
Nov 2020Jan 2021

Built high-performance RESTful APIs using Node.js, Express.js, Sequelize ORM with optimal data indexing. Collaborated with frontend teams to map API schemas and troubleshoot integrations.

Freelance Backend Developer

Independent / Self-directed
Dec 2019Oct 2020

Executed independent backend contracts focusing on robust logic routines, enhancing skills in PostgreSQL and AWS cloud instances.

Software Trainee Engineer

Carvewing Solution
Feb 2019Nov 2019

Developed an automated log monitoring tool that analyzed runtime exceptions, sent notifications, and auto-created tracking tokens to reduce incident response time. Gained foundational SDLC experience including testing and git branch management.

Projects

Bloc Ad-Manager

A real-time bidding platform built with NestJS, TypeScript, and PostgreSQL. Implemented secure payment gateway architectures and optimized database relations, resulting in a 40% boost in platform efficiency.

NestJSTypeScriptPostgreSQL

Zonely

Real-time chat and calling platform using Fastify and Redis, managed 500+ concurrent users at 99.9% uptime and reduced delivery latency by 35% through event-driven design.

FastifyRedis

Ariso

Secure workspace integration module processing over 5,000 daily actions, integrated AWS SQS for reliable asynchronous event consumption ensuring 100% data accuracy.

AWS SQS

Creoate

Built core backend features for a B2B platform using Node.js, AWS Lambda, and MySQL, streamlining complex order customization workflows and eliminating 70% of manual shipping processes.

Node.jsAWS LambdaMySQL

Automated Log Monitoring Tool

Developed a tool that analyzed runtime exception payloads, sent real-time notifications, and auto-created tracking tokens to reduce incident response times.

GitTesting Pipelines

Education

B.Tech

Computer Science and Engineering

Adamas Institute of Technology, MAKAUT West Bengal, India - 2018

Higher Secondary (Class XII)

WBCHSE - 2014
kingshuk_sanyal - Backend Developer | Node.js | | HiringAnt