Elango Ponnusamy
Senior Full-Stack Engineer with 5+ years building scalable, accessible, and high-performance digital products.
Tamil Nadu, India · Remote collaboration worldwide
Professional Focus
Available for full-time senior engineering roles, high-impact contract work, and technical architecture consulting. Daily work centers on product UIs, component architecture, and web performance — with working fluency across REST/WebSocket APIs, PostgreSQL, and cloud deployments.
Education & Growth
Continuous learning through production deployments. Backed by a Master of Business Administration (MBA) and a Bachelor of Computer Science, combining business acumen, product strategy, and technical execution to deliver software that drives measurable business outcomes.
What I build & how I work
Over the past five years, I have designed, built, and shipped production user interfaces for startups and established teams — from consumer-facing React and Next.js applications to design systems, full-duplex WebSocket chat platforms, and cloud-backed microservices.
My work centers on three core principles: write code that is easy to maintain, ship features that perform under real traffic, and design interfaces that feel fast, intentional, and accessible. I specialize in the React and Next.js ecosystem, TypeScript, modern CSS, and accessible component architecture, with working fluency across REST/GraphQL APIs and PostgreSQL.
Whether the task is a greenfield SaaS product, a legacy frontend migration, or a Core Web Vitals performance audit, I focus on measurable outcomes — shorter load times, cleaner architecture, and zero production incidents.
1. Maintainable architecture
Clear module boundaries, typed contracts, and patterns teams can extend without tribal knowledge.
2. Measured performance
Core Web Vitals, server timing, and user signals guide optimization with before/after benchmarks.
3. Accessible by default
Semantic HTML, full keyboard navigation paths, and contrast are baked into the shipping checklist.
Where I've shipped production work
5+ years of driving web initiatives, optimizing architecture, and scaling frontend applications.
Full Stack Developer / JavaScript
Thidiff TechnologiesNov 2021 — Aug 2026Web & Mobile Application Development Designed, developed, and maintained web and mobile applications for retail operations, including purchases, sales, attendance, inventory transfers, activity tracking, and reporting. Improved application performance, responsiveness, and usability across web and mobile platforms. System Integrations & Automation Built Slack webhook integrations to deliver real-time operational alerts and reports. Integrated the WhatsApp Business API with template messaging to automate shift reminders, transactional alerts, and business notifications. Implemented two-way Zoho Books API synchronization for invoices, vendor bills, expenses, and financial records. API & UI Optimization Optimized backend APIs, database queries, and frontend components to improve response times and provide smooth user experiences. Developed reusable UI components and streamlined workflows across web and mobile applications. Reporting & Data Visualization Created interactive dashboards and operational reports using Chart.js and Highcharts. Transformed complex business data into clear and actionable insights for administrators and management teams. Notifications & Automated Reporting Automated Slack notifications for purchases, sales, login activity, and critical system events. Integrated Bitbucket notifications for commits, pull requests, and merges. Developed scheduled email reports containing daily activity summaries and key performance metrics for administrators. Push Notifications – Firebase Cloud Messaging Implemented real-time mobile push notifications using Firebase Cloud Messaging. Handled foreground, background, and terminated application states to ensure the reliable delivery of critical alerts. Real-Time Voice Calling – Agora SDK Integrated real-time voice calling into a React Native application using the Agora SDK. Customized the calling interface, managed permissions and authentication tokens, and improved call connection performance and reliability.
Technical expertise
Frontend
Open Source Philosophy
Beyond client work, I publish and maintain small, zero-dependency NPM packages built from real challenges hit in production — focused utilities other developers can install and use immediately with confidence.
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Project Inquiries
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