James Kelly

I’m a senior software engineer with 8 years of experience at Apple, where I’ve designed and delivered high-scale web apps, internal tools, and developer platforms. I focus on full-stack development and production-ready integration of LLMs, with a strong track record of improving developer velocity and reducing latency.

In my recent work, I led real-time matchmaking and live leaderboard experiences, using React/TypeScript with Node.js and backend Go services backed by PostgreSQL and Redis—reducing QA debug time by 35%. I also fine-tuned Llama 3 8B to summarize server logs, cutting MTTR from 20 to 4 minutes in controlled testing.

I’ve also driven portal and platform modernization, rewriting the App Store web experience with Next.js/TypeScript to reach Lighthouse 98+ performance via ISR, code splitting, and lazy loading. Beyond traditional web work, I built retrieval-augmented generation systems (Python/FastAPI and React with Milvus/Redis) deployed as a Slack bot and web UI—serving 2,000+ queries per week and estimated to save 150 engineering hours monthly.