Andrew Halley

I'm building production-scale backend systems at Mango Payment S.A., where I develop MongoDB migration scripts with optimized lookups and concurrency management for fintech workloads. I also work across AWS services and refactor legacy TypeScript using data structures, custom utility types, and clearer service boundaries.

Previously at Penguin Infrastructure S.A., I built an AI-powered invoice document reader, internal tools, and a machine dashboard with predictive algorithms. I optimized TCP connections to handle machine I/O directly and integrated Meta Suite and Google Calendar services for a bovine market app.

At Penguin Academy S.A., I delivered Google-based location tracking and improved Bluetooth connectivity for a cycling mobile app, alongside a backend for cryptocurrency management software. I've also used React and Svelte across frontend projects.

Outside of work, I collaborated on Morfit, a Flutter, Node.js, and Firebase fitness app, contributing to AI-powered voice recognition and backend features. My foundation includes algorithms, data structures, MongoDB optimization, AI, Scrum, IoT, and software methodology.