Adam Fallon
Founding Engineer / London
Founding/Staff AI engineer with 9+ years of experience building production AI systems across agentic search, LLM retrieval, personalization, ranking, and evaluation.
Led zero-to-one and scaled initiatives with measurable impact, including 500k product interactions in three months, 59% faster build times, and 51 engineering days/year saved through automation.
Experience
- Heywa Labs
- Founding engineer and worked on our AI search platform
- Built multi-source LLM retrieval and real-time adaptive UI generation
- Owned relevancy and quality systems including image ranking, personalization, and evaluation frameworks
- PEI Group
- Built multi-label NLP tagging models for WordPress content, achieving 70-90% accuracy across 16 brands
- Deployed LLM content-generation pipeline accelerating product content delivery across multiple brands
- Trainline
- Founded the AI Lab and launched Guide Book, a GenAI travel assistant with 500k uses in 3 months
- Automated iOS release workflows, saving 51 engineering days per year
- Led Apple Silicon migration, reducing build times by 59%
- Delivered EU Railcard functionality used by 52% of European MAUs
- Rightmove
- Delivered search filter rewrite, app-native targeted advertising, and experimentation capabilities for the iOS app
- Introduced Bazel build tooling, reducing iOS build times by 5x
- Implemented New Relic API monitoring with automated alerting
Pioneering Generative UX • Product Hunt Product of the Day
Leading intelligence platform for private markets professionals
Europe's #1 train & coach app • 10M+ downloads • 4.9 stars iOS
UK's largest property portal • 1m DAU