# Rajveer Singh > Rajveer Singh (rajveeerr on GitHub, X and LinkedIn) is a software engineer in New Delhi, India, who builds AI products end to end: the interface, the backend and the infrastructure that keeps them running, across full-stack, product and design engineering. His work includes live voice rooms and Stripe billing for IABTM, a US self-improvement platform, where he is a software engineer; HyperPersona, an agentic recommender on AWS Bedrock that his team took to the top 0.1% of 22,000+ at Cognizant Technoverse 2.0; Safire, a harassment shield for LinkedIn DMs that took first place at HackWIE 3.0 and Code Kshetra 2.0; 10xAnswers, a React AI chat component on npm; most of the web app for Wii Hop, a US local-deals startup; and an AI version of himself on his site that answers for his work, shows it and checks a job description against it. He is a 7× hackathon winner or finalist. I build the whole product: the interface people touch, the backend and realtime underneath, and the infrastructure that keeps it up. I’ve shipped live voice rooms and billing at IABTM, an AI engine that placed in the top 0.1% of Cognizant’s Technoverse hackathon, a harassment shield that took first place at two hackathons, an AI chat on npm that strangers install, and the lake at the top of the home page, which you can fish. Right now I’m building a voice agent that speaks for my work. Shipping since August 2024. ## Now - Building: [Talk to my agent](https://rajveers.com/projects/ai-me). An AI version of me for this site. It answers for my work from the pages here, with sources, shows the real projects, checks a job description against what I have built, and acts on the page when asked. Next, it speaks. - Learning: Retrieval and evals. Hybrid search, reranking, and a set of questions scored on every change. - Learning: LLM tracing. Latency, tokens and cost for every stage of a turn. - Learning: React Native. Two small apps. They show up here once they’re on a phone. ## Experience - **IABTM**, Software Engineer (internship), Sep 2025 to now. Building the core of a US self-improvement platform. Rebuilt its live voice rooms on an SFU, rebuilt its Stripe billing so no one is charged twice, and built the daily AI pipeline (Gemini) that curates what each member reads. Also built the email and the team’s admin tools, and runs the AWS. - [Inside the voice rooms and billing](https://rajveers.com/projects/iabtm) - **Wii Hop**, Software Engineer (contract), Jul 2025 to May 2026. Built most of the web app for a US local-deals startup: deals on a live map, table booking, events, loyalty streaks, and heists that turn a night out into a game (React, TypeScript, Leaflet). On the backend, wrote the parts where money and stock change hands, from the heist item shop to catering orders priced on the server. Also built screens for the Expo app. - [Inside the deals, bookings and loyalty](https://rajveers.com/projects/wiihop) - **Modulus**, Frontend Engineer (internship), Apr 2025 to Aug 2025. Built the product’s interface from the first screen: cohort pages, booking and payment on Razorpay, scheduling through Cal.com, and live sessions with chat running beside the stream (React, TypeScript, hls.js). Wired PostHog funnels so the team could see where people dropped off before they enrolled. - [Inside booking and live sessions](https://rajveers.com/projects/modulus) ## Projects - [HyperPersona](https://rajveers.com/projects/hyperpersona) (hackathon, 2026): An agentic recommender on AWS Bedrock that four of us built in a week: top 0.1% of 22,000+ at Cognizant Technoverse. I built the storefront and event SDK. - [Safire](https://rajveers.com/projects/safire) (hackathon, 2025): A harassment shield for LinkedIn DMs that won HackWIE 3.0 and Code Kshetra 2.0. I built the backend: the API, moderation failover and evidence reports. - [10xAnswers](https://rajveers.com/projects/10xanswers) (side project, 2024 to 2025): A drop-in React chat widget for AI answers, built and published alone: 12,493 downloads across 55 releases on npm. - [Kernel](https://rajveers.com/projects/kernel) (take-home, 2025): Anonymous chat rooms with peer-to-peer voice, where the server only relays the handshake. The take-home for the role I have now. - [The lake](https://rajveers.com/projects/lake) (side project, 2026): This site's hero: a lake painted in code, with water simulated on the GPU, creatures that make ripples, and fishing with your phone as the rod. - [The AI me](https://rajveers.com/projects/ai-me) (side project, 2026, in progress): An AI version of me that answers for my work while I’m away: it reads this site, replies in my voice with its sources, shows the real projects instead of describing them, checks a job description against what I’ve built, and moves around the site when you ask. ## Track record ### Hackathons - [HackWIE 3.0](https://dorahacks.io/hackathon/826/winner), 1st place, IEEE MSIT · 2025 - [Code Kshetra 2.0](https://x.com/RajveeerrSingh/status/1894034885855138202), 1st place, out of 15,000+ registrations, Geek Room · 2025 - [Technoverse 2.0](/projects/hyperpersona), Top 0.1% of 22,000+, Cognizant · 2026 - UPSTART, Second runner-up, E-Summit ’25, E-Cell MSIT · 2025 - SheBuilds × OpsTree, Award, 2025 - MSC Hack-It-Up, Special mention, IGDTUW · 2025 - Excalibur, Techspardha, Final round, NIT Kurukshetra Winner or finalist: 7× ### Open source - [10xanswers](https://www.npmjs.com/package/10xanswers), An AI chat for React sites, 55 releases, npm - [axios-docs #217](https://github.com/axios/axios-docs/pull/217), A fix in the official docs, merged, axios - [100xDevs CMS](https://github.com/code100x/cms/pulls?q=is%3Apr+author%3Arajveeerr+is%3Amerged), 4 pull requests, merged, code100x Downloads on npm: 12,493 ### Stack - Interface, React, Next.js, TypeScript, Tailwind, Expo, ×5 - Server, Node, Express, Socket.IO, Prisma, ×4 - Realtime, WebRTC, mediasoup, hls.js, ×3 - Data, MongoDB, Redis, Firebase, ×3 - Money and AI, Stripe, Razorpay, Shopify, Gemini, ×4 - Cloud and graphics, AWS, Cloudflare Workers, WebGL2, GLSL, ×4 Tools in production: 23 ## Contact - Email: rajveergreets@gmail.com - Book a call: https://cal.com/rajveer - Résumé: https://rajveers.com/resume.pdf - Elsewhere: [github](https://github.com/rajveeerr), [x](https://x.com/rajveeerrsingh), [linkedin](https://www.linkedin.com/in/rajveeerr), [peerlist](https://peerlist.io/rajveeerr), [npm](https://www.npmjs.com/~rajveeerr), [devfolio](https://devfolio.co/@rajveeerr), [producthunt](https://www.producthunt.com/@rajveeerr), [holopin](https://holopin.io/@rajveeerr), [wakatime](https://wakatime.com/@rajveeerr) - Open to conversations.