Swetha Arumugam

Full Stack Developer with 3 years of specialised MERN stack experience building production-grade fintech and payments platforms for UK/US clients. Led frontend architecture for a high-throughput payment gateway — delivering 40% faster feature delivery and 35% render reduction. Uniquely combines MERN expertise with AI integration, owning features end-to-end across API design, UI delivery, and cross-functional agile teams.

Software Engineer – Full Stack Developer at Persyst Systems Pvt Ltd. (2022-05 – Present)

• TRAXX Payments – Payment Gateway Admin Portal: Architected modular React component system for transaction, merchant, and bank management modules, improving feature delivery speed by 40%.
• Optimized high-frequency data components using React.memo, useMemo & useCallback, reducing re-renders by 35%.
• Designed secure RESTful APIs with JWT authentication and role-based access control (RBAC).
• Implemented Redux state normalization, cutting redundant API calls and boosting application performance.
• Built enterprise-grade async state management (loading/success/failure) with robust error handling.
• Thermae Bath Spa – Booking & Operations Platform: Developed full-stack booking platform using React.js and Node.js, improving operational efficiency by 25%.
• Built reusable UI components with React Hooks, reducing development time by 30%.
• Ensured cross-browser compatibility and responsive design through structured testing.
• E-Commerce UI/UX Redesign & Inventory System: Led UI/UX redesign for e-commerce platform, improving engagement and usability.
• Developed inventory management system using ASP.NET and SQL Server with automated SSRS reporting.

M.Sc. in Computer Science – Anna University (CDE) (2023 – 2025)

B.Sc. in Computer Science – Apollo Arts & Science College (2018 – 2021)