--- title: "Vaibhav Chhajer - Module Lead in Hyderabad | Tal" description: "Meet Vaibhav Chhajer, Module Lead at Happiest Minds Technologies based in Hyderabad. AI stack includes antigravity, claude code, and codex. Explore public work links including github." image: "https://tal.club/meet/vaibhav-chhajer/share-image" --- # Vaibhav Chhajer on Tal ## Headline Module Lead at Happiest Minds Technologies ## About I'm a Senior Frontend & AI Engineer with 5\+ years shipping production applications — and for the past few months, I've been going deep on AI engineering\. I have built and deployed two production AI apps from scratch: → DocSense — a RAG\-powered document intelligence platform \(Next\.js \+ Gemini \+ Supabase pgvector\)\. Upload any PDF, ask questions, get answers with source citations\. No hallucinations\. → Interview Coach — an LLM\-based mock interviewer that adapts to any job description, asks role\-specific questions, and scores you out of 10\. My core stack: React, Next\.js, TypeScript, Node\.js, Express\.js, Graphql on the frontend/backend — now extended into RAG pipelines, LLM orchestration, prompt engineering, and vector databases\. At Publicis Sapient I pioneered an AI\-assisted development workflow using Claude and GitHub Copilot that cut feature delivery time by 25%\. At Mosaic Wellness I built systems that drove 20% user retention growth and 10% revenue increase\. Available for new opportunities — open to Senior Frontend, Full Stack, or AI Engineer roles in Hyderabad or remote\. Building in public every week\. Follow along\. ## Location Hyderabad ## AI stack antigravity claude code codex github copilot mcp ollama ## Work experience Module Lead at Happiest Minds Technologies, May 2026 \- Present · 5 mos, Hyderabad Senior Experience Engineer at Publicis Sapient, May 2025 \- May 2026 · 1 yr 1 mo, Hyderabad, Pioneered an AI\-assisted development workflow using Prompt Engineering and LLM tools \(GitHub Copilot, Cursor AI\) for code generation, refactoring, and content sanitisation — reduced feature delivery time by 25% and established a repeatable AI\-augmented engineering model for the team\. Architected a Next\.js \+ Micro\-Frontend \(MFE\) checkout ecosystem for Verizon Prepaid, scaling the platform from Total Wireless to a multi\-brand foundation supporting Visible — built brand\-specific component libraries and custom CSS architecture\. Led full\-stack UI integration for major hardware launches \(iPhone 16e, Samsung Galaxy A16\): built dynamic offer modals, complex promotional logic with multi\-line savings and fallback paths — maintained 70% checkout conversion uptime during high\-traffic launches\. Resolved critical payment UI defects for PayPal and Braintree integrations ensuring 100% brand compliance and transactional security\. SDE 2 at Mosaic Wellness, May 2024 \- May 2025 · 1 yr 1 mo, Mumbai, Built full consultation system with CometChat SDK on web and Dubai markets — real\-time chat, expert matching, appointment booking — drove 7\.5% increase in bookings\. Developed LJ Dubai platform with Stripe and Tabby payment integrations; scaled Rootlabs brand for US market within unified Next\.js architecture\. Led widgetization of web platform — widget\-based component architecture with centralised mapper eliminated manual content engineering overhead\. Shipped Partial COD payment flow in React Native app with eligibility checks, split payment logic, and failure fallbacks\. Software Developer at Mosaic Wellness, Mar 2022 \- May 2024 · 2 yrs 3 mos, Bengaluru, Architected unified multi\-brand platform using React\.js, Next\.js, and React Native with dynamic brand differentiation — achieved 20% increase in user retention across 3 brands\. Led internationalisation of web platform — locale\-based routing, and region\-specific content delivery supporting global market expansion\. Built Zeus admin panel: S3\-fetched JSON schemas, recursive data transformation, role\-based permissions, push to staging/production — reduced engineering dependency for content updates by 80%\. Integrated Paytm, Snapmint, Simpl Pay\-in\-3, and Partial COD with eligibility checks and failure fallbacks — boosted payment conversion by 5%\. Authored tests using Jest and React Testing Library; documented component library via Storybook\. Game Developer at FairShuffle, Jun 2020 \- Mar 2022 · 1 yr 10 mos, Pune Division, Built a cross\-device, cross\-browser Poker card game using HTML Canvas, JSFabric, and JavaScript — implemented player interactions, sprite animations, and sound synchronisation across 5\+ browser environments\. Developed backend game logic with RESTful web services\. Mentored 3 junior developers, improving team velocity by 15%\. Assistant System Engineer at Tata Consultancy Services, Aug 2018 \- Aug 2019 · 1 yr 1 mo, Greater Hyderabad Area, QA Automation Engineer for Western Union client systems\. Automated testing processes using SOAP UI — reduced manual testing time by 20%\. Managed test case tracking and sprint coordination via JIRA; collaborated on API testing and regression cycles maintaining 100% sprint visibility across all releases\. ## Education Bachelor of Technology \(B\.Tech\.\), Computer Science, SRM IST Chennai ## Public links - github: https://github\.com/Vaib4496 [View the original profile](https://tal.club/meet/vaibhav-chhajer) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Person", "@id": "https://tal.club/meet/vaibhav-chhajer#person", "name": "Vaibhav Chhajer", "url": "https://tal.club/meet/vaibhav-chhajer", "image": "https://tal.club/meet/vaibhav-chhajer/profile-photo.jpg", "description": "Meet Vaibhav Chhajer, Module Lead at Happiest Minds Technologies based in Hyderabad. AI stack includes antigravity, claude code, and codex. 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