Hi, I'm Adam Fallon

About Me

I'm a software engineer based in London with over a decade of experience building products used by millions. These days I primarily work on building long-range, context aware LLM agents, but previously I have worked on iOS apps used by millions of users, and backend systems supporting 4m DAU's.

Previously, I worked at Trainline where I led the AI Lab and built real-time translation services using Claude and AWS Bedrock. Before that, I was at Rightmove working on the UK's largest property platform.

I write about the things I learn - from Postgres geospatial queries to Elasticsearch data analysis, iOS debugging techniques, and self-hosting with Docker. I believe in using boring, reliable technology and understanding every piece of your stack.

What I Work With

• Languages: Swift, Python, TypeScript, C#, SQL, Bash
• iOS: UIKit, SwiftUI, URLSession, Core Data
• Backend: Postgres, Elasticsearch, Redis, Docker
• ML/AI: Langchain, Pydantic AI, RAG, Evals, Vertex AI, AWS Bedrock, LLM prompt engineering
• Infrastructure: Google Cloud Run, GitHub Actions, nginx
• Tools: Claude Code, Cursor, Emacs, Org Mode, Git, Linux