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Jatin Kumar

Full stack Engineer

[email protected]

A builder at heart with 8+ years in frontend and full-stack development, specializing in React — component architecture, performance, and micro-frontends — with hands-on Node.js service design. I publish an npm component library and use Storybook-driven workflows, bridging product needs with robust engineering.

Experience

Senior Software Engineer

Oct 2025 – Mar 2026
JioHotstar via ProximityWorks
Remote
Contributed to the AdTech team for JioHotstar's web streaming platform and Smart TV apps across multiple devices, extending existing Module Federation micro-frontend modules. Delivered key features including Companion Screen ads, resolved Samsung TV remote/playback issues, and implemented CSS/JS compatibility fixes and polyfills for legacy Chromium-based Smart TV browsers.
StorybookNext.jsReactJSTailwindConnected TVMobXModule Federation

Senior Software Engineer

Nov 2023 – May 2025
Builder.ai
Gurugram, India
Built custom server-side rendering (SSR) solutions that improved page load performance by ~30% while enhancing scalability for high-traffic applications. Leveraged Deno to reduce runtime overhead by ~25% and improve cold-start performance. Optimized Sanity CMS workflows, cutting content publishing time by over 70%, and introduced data-driven feature rollouts with Statsig to improve experimentation and user engagement.
DenoSanity CMSTailwindStatsigSegment

SDE-3

May 2021 – Sep 2023
Kenko Health
Gurugram, India
Led a cross-functional frontend team to deliver a production-ready MVP 25% ahead of schedule while aligning engineering efforts with business goals. Earlier in the project, contributed to backend architecture by designing database schemas and developing the Auth and Plans services. Implemented SSR, ISR, and static generation in Next.js to achieve ~40% faster load times and significantly improve search visibility. Integrated Google Analytics, Sentry, and Razorpay to strengthen observability, payment reliability, and product insights.
Next.jsESlintNode.jsGoogle AnalyticsFramer MotionExpress.js

Software Engineer

Jan 2019 – Jan 2021
Crio.Do
Bengaluru, India
Designed and maintained the frontend architecture for Crio.Do's learning platform, focusing on scalability. Built the Mentor Dashboard for real-time learner monitoring via WebSocket connections backed by RabbitMQ/MQTT, improving mentor efficiency by ~30%, and collaborated across teams to refine requirements and reduce post-release issues.
ReactJSMaterial UISpringBootJenkinsReduxAWSRabbitMQMQTT

Associate Software Eng.

Jul 2017 – Jan 2019
Kirusa
Bengaluru, India
Engineered and evolved the frontend architecture for Kirusa's Analytics Dashboard, driving the migration from AngularJS to React for improved performance and maintainability. Scaled Yii2-based web portals to support twice the data ingestion capacity while enhancing reliability, and developed Alexa skills and chatbot integrations that increased user engagement and reduced support requests by 25%.
HTML 5ReactJSPHPSCSSAngularJSSpringBoot

Education

Delhi Technological University

Jan 2013 – Jan 2017
B.Tech, Software Engineering

Air Force School

– Jan 2012
High School

Projects

More details →

AgentDB9 - AI agent Workspace

Developed a containerized AI-powered coding environment featuring a browser-based VS Code IDE, multi-provider LLM integration, semantic code search, and a scalable microservices architecture.

@web-portfolio/icons

Published and maintain an npm component library (@web-portfolio/icons) — 629 bundled SVG icons behind one typed <Icon /> component, versioned and consumed across multiple projects instead of ad hoc per-icon imports.

Multi-Tenant Dashboard

A multi-tenant analytics dashboard prototype built with Next.js, React, TypeScript, and Tailwind CSS.