Jesal Thakur
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💼 Software Engineer — Concetto Labs

Jan 2024 – Present

At Concetto Labs, I build scalable and performance-focused web applications using React, Next.js, TypeScript, Redux, and TanStack Query. I work on production-grade client projects with a strong focus on reusable architecture, frontend optimization, SEO improvements, and seamless user experiences.

🔧 Key Contributions

  • 🧱 Reusable React Components: Built reusable React + TypeScript components used across multiple client products including Jobalots, EliteChem, and BargainFox, reducing new feature development time by 30%.

  • ⚡ TanStack Query Optimization: Architected advanced TanStack Query integration for Jobalots with automated cache cleanup and optimized data synchronization, reducing client-side memory usage by 25% on high-frequency listing pages.

  • 🔍 SEO & Sitemap Improvements: Enhanced SEO for Jobalots by implementing JSON-LD schema markup and dynamic category-based sitemap generation in Next.js, reducing sitemap load time by 70% and improving search engine visibility.

  • 🖼️ Image & Performance Optimization: Improved image delivery in EliteChem using Next.js Image, responsive image handling, lazy loading, and built-in optimization techniques, contributing to faster page loads and better Core Web Vitals performance.

  • 📜 Advanced Listing Experience: Boosted BargainFox product listing performance by 45% through implementing dynamic pagination, virtualized scrolling, and scroll-position restoration, improving navigation experience and reducing bounce rates on slower connections.

  • 🚀 React → Next.js Migration (Fovero): Led end-to-end migration of the production Fovero application from React to Next.js, increasing PageSpeed score from 22 to 85 via server-side rendering (SSR), aggressive code splitting, and image optimization.

  • 💚 Nuxt/Vue Delivery: Delivered a production application using Nuxt.js, Vue.js, TypeScript, and Pinia, implementing scalable state management patterns and reusable UI components that accelerated feature delivery timelines.

  • 🚀 Production Deployments: Managed and shipped production-ready deployments while ensuring application stability, responsive UI behavior, and scalable frontend architecture across client projects.

This role has strengthened my expertise in frontend performance engineering, scalable React architecture, caching strategies, and building maintainable production applications.