Kathiresan M 20CSEE15

Software Engineer

Salem, Tamil Nadu, India 4+ yrs exp 89 · Excellent

About

Software Engineer with 4+ years of experience building and deploying production web applications using React.js, JavaScript, Node.js/Express.js, PHP, MySQL and PostgreSQL. Delivered 8+ full-lifecycle platforms across EdTech, food-security analytics, AI document processing, ERP and fleet management, improving user engagement by 25%. Hands-on with AngularJS, OpenAI and Claude API integration, Stripe/PayPal payments, role-based access and WebSocket real-time features. Works closely with AI/Python engineers, product managers and QA teams.

Skills & Expertise (36)

React.js Advanced

8.5/10

Years Exp

JavaScript Advanced

8.0/10

Years Exp

RESTful APIs Advanced

8.0/10

Years Exp

AI Advanced

8.0/10

Years Exp

Node.js Advanced

8.0/10

Years Exp

Php Advanced

7.5/10

Years Exp

OpenAI API Advanced

7.5/10

Years Exp

Git Advanced

7.5/10

Years Exp

MySql Advanced

7.0/10

Years Exp

Stripe API Advanced

7.0/10

Years Exp

Scrum Advanced

7.0/10

Years Exp

Agile Advanced

7.0/10

Years Exp

code reviews JWT Webhooks Schema Design AWS S3 GitHub Postman VS Code Unit Testing Debugging Express.js Ajax jquery Recharts bootstrap Material UI CSS3 HTML5 Postgresql WebSocket PayPal API Claude API AngularJS LLM

Work Experience

Software Engineer (Full Stack Developer)

CAP Digisoft Solutions Pvt. Ltd.

May 2022 - Present

Delivered 8 full-lifecycle platforms across EdTech, food-security analytics, AI document processing, fleet inspection and order management, owning requirements through deployment. Improved user engagement by 25% by building responsive, high-performance React.js applications backed by Node.js/Express.js and PHP APIs. Integrated OpenAI and Claude APIs and applied prompt engineering to add AI-assisted features, working closely with AI/Python engineers. Designed and shipped RESTful APIs with Node.js/Express.js and PHP; integrated Stripe and PayPal for secure payments, including bulk payments and webhooks. Modernized an 8-year-old legacy codebase by migrating the frontend from React 15 to React 19 and resolving deprecated packages and dependencies. Developed analytics dashboards with Recharts and standard-deviation indicators for UN FAO food-security reporting across 6 countries. Optimized MySQL and PostgreSQL schemas for integrity, security and query performance in multi-tenant applications; built AWS S3 file and media pipelines. Reduced post-release defects through systematic testing, debugging and code reviews; shipped on time with project managers, instructional designers and QA.