Ayush Singh

At Punch, I build the real-time data layer for a single-screen trading platform serving 10k+ daily active users, using low-latency WebSocket streaming, browser-side persistence, and custom charting. I also built and shipped a company-wide employee trade-declaration compliance platform solo in under a week, reducing report submission turnaround from days to minutes.

I led Punch's Kotlin Multiplatform migration to 90–95% shared code with zero regressions in the production Android app, while helping ship the company's first iOS TestFlight beta in under three months. I designed an agentic AI workflow using Claude Code for planning, TDD migrations, review, and validation.

At Fitpage, I was the sole engineer behind a face-recognition race timing system that achieved 95% accuracy against RFID at a 2,000-runner event while reducing compute costs to under $5 per event. I also owned Captured end-to-end, including a serverless photo-processing pipeline handling 1M+ photos monthly and an organizer platform used across 1,000+ events each month.

I've delivered scalable media, communication, observability, and security systems across AWS, React, Node.js, Kotlin, Python, and PostgreSQL. I enjoy independent 0→1 delivery and finding practical ways to improve product performance, reliability, and cost.