I worked with 343 Industries to implement UI screens and user flows for Halo 4 using a proprietary game engine. Partnering remotely with an engineer, I translated mockups and wireframes into fully functional in‑game interfaces, with a primary focus on key features such as character customization, loadouts, and post‑battle flows. My responsibilities included integrating UI elements, building reusable widgets and templates, creating animations and assets, and troubleshooting implementation challenges. I managed timelines, facilitated feedback sessions with 343 Industries, and collaborated closely with designers and engineers to ensure high‑quality, production‑ready UI solutions.