Rajveer Singh, a software engineer building end to end.

I ship across the whole stack: ⁠React, Next.js and React Native interfaces, ⁠Node and FastAPI services, realtime over ⁠WebSockets and WebRTC, AI agents on ⁠AWS Bedrock, and ⁠the infrastructure underneath, on AWS and Cloudflare. I’ve built voice rooms on an SFU, idempotent payment webhooks, cron jobs that run once across servers, a load balancer from scratch, and deploys that roll themselves back.

Right now I’m building a brain-computer interface and a drop-in version of this site’s AI me, and learning agent evals, Kafka, distributed systems and React Native.

I’ve won or reached the finals of ⁠seven hackathons, among them ⁠Cognizant’s Technoverse 2.0, as one of 24 teams from 5,600+. I’m open to conversations.

A worn label, Counts once: a Stripe webhook is written to a ledger under a unique event id first, so a repeat gets a 200 and nothing runs twice

A round blue sticker, 5 speakers, 1 SFU: each speaker uploads once to a mediasoup router that forwards to every listener

A black label, Least connections: a load balancer written from scratch in Node spreads requests over five replicas and skips the one whose breaker is open

A worn round price sticker: top 24 of 5,600+ teams, finalist at Cognizant Technoverse 2.0

A red label: 7× hackathon winner or finalist, first at HackWIE 3.0 and Code Kshetra 2.0

A purple label, Rolls itself back: a merge is built, swapped in and has 90 seconds to report healthy, or code, dependencies and process roll back on their own

A yellow spec plate for 10xanswers on npm: 13,113 downloads, 56 releases

Experience

Where I’ve worked

Sep2025
IABTM
internshipCurrent
Software Engineer · Remote, US · Sep 2025 to now
I build and run a US self-improvement platform for 3,000+ members, from the API down to the box it runs on.
- A 500+ endpoint Node API, with voice rooms on a mediasoup SFU
- Stripe billing on an idempotent ledger: a retried event never charges twice
- A daily AI pipeline that curates stories from six publishers
- Releases that check their own health and roll themselves back
Node, Express, MongoDB, Redis, Socket.IO, mediasoup, Next.js, Stripe, AWS (EC2, S3, CloudFront)iambetterthanme.com
How it fits togetherOne box, and everything it needs to stay up: nginx in front, the API and the SFU under PM2, media on S3 behind CloudFront, jobs that take a lease before they run.
- Inside the API, voice rooms, billing and deploys
Jul2025
Wii Hop
contract
Software Engineer · Remote, US · Jul 2025 to May 2026
Built most of the web app for a US local-deals startup, and the backbone under it.
- A multi-tenant data model, every merchant’s rows scoped by merchant
- Role-based access across seven roles, checked on the server
- Deals on a live Leaflet map, with geolocation
- Money and points that only move inside a Postgres transaction
React, TypeScript, Leaflet, Node, Prisma, Postgres, Expobeta.yohop.com
How it fits togetherWeb and Expo on one Node and Prisma API: every merchant’s rows keyed by merchant, roles checked on the server and mirrored in the app.
- Inside the tenancy, roles, maps and money
Apr2025
Modulus
internship
Frontend Engineer · Apr 2025 to Aug 2025
Built an interview-prep platform's product from the first screen.
- 45 routes, 29 of them loaded on demand behind skeletons
- 54 TanStack Query queries, each cached as long as its data stays true
- Razorpay checkout priced by the server, final only on its webhook
- Live sessions over HLS, with chat beside the stream
React, TypeScript, TanStack Query, hls.js, Firebase, Razorpaytrymodulus.com
How it fits togetherThe browser never decides a payment: Razorpay is confirmed by the server’s webhook, and live sessions stream over HLS with chat beside them.
- Inside payments and live sessions