Hey, its me SAYAN / @sa_yawwwn👋

Available for work

A curious (too much)Software Dev™ from the land of chai & chaos 🇮🇳

I make full-stack apps that look good, run fast, and sometimes crash for fun (kidding xD). On the front, I speak React & Tailwind. On the back? Spring Boot & Node.js :)

Spring Boot

Java

React.js

Next.js

Node.js

MongoDB

PostgreSQL

TypeScript

Jan 2024 - Present
TATA Consultancy Services (TCS)
Developer
Bangalore, India
Supplier Collaboration
Spring Boot
PostgreSQL
Azure DevOps CI/CD
Azure Container Apps
Engineered a scalable recommendation engine with multi-attribute weighted scoring (configurable via YAML properties) that ranks 300+ supplier products in <200ms, improving procurement efficiency through automated I2S matching.
Implemented Redis caching with TTL for frequently accessed product catalog data, reducing database queries by 65% and improving average API response time by 50% (from 800ms to 400ms) for read-heavy endpoints.
Built a near real-time alert system using Spring Scheduler and JavaMailSender that monitors product catalog changes every 60 seconds and notifies 100+ buyers via email upon detecting I2S matching opportunities.
Achieved 80% unit test coverage using JUnit and Mockito, identifying and resolving 20+ critical edge cases to enhance system reliability.
Integrated Apache Kafka with Spring Boot microservices for asynchronous ERP data synchronization, designing separate topics (purchase-orders, invoices, product-catalog, item, GRN) with consumer groups enabling parallel processing across 3 services.
Standardized Azure DevOps CI/CD pipelines using reusable templates across 6+ microservices, combined with Jib containerization and integrated security scanning (Trivy, Semgrep) to streamline secure and automated deployments.
Sales iAssist
React.js
Node.js
Express.js
Sequelize ORM
MS SQL Server
Developed Sales iAssist, a full-stack web application built with React.js and Spring Boot, replacing manual Excel reporting and email-based updates with near real-time sales, backlog, and transaction tracking across multiple store locations.
Designed and implemented optimized RESTful APIs with query tuning and a Redis caching layer, supporting concurrent dashboard access with consistent sub-second response times.
Built interactive data visualizations using Recharts with server-side pagination and lazy loading, enabling store managers to analyze 100K+ daily transactions without performance degradation.
Automated daily and ad-hoc SQL checks, batch job monitoring, and peer system tracking, reducing manual effort by 20% and saving 15–20 hours per week for business and support teams.

still not sure? Check out my Projects

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AnonExchange

AnonExchange is a modern, scalable, user-friendly web application in Next.js enabling users to share anonymous messages, feedbacks and give businesses to get product feedback from users. The application is fully responsive and has beautiful animations also a dashboard for usability.