The authentication edge a payments platform's card traffic can't route around — held to five nines, and migrated live without dropping a request.

• Led a zero-downtime Fastly platform migration on live token traffic, coordinating validation across staging and production.
• Migrated three production authentication services from Spring Boot 3 to 4, Cassandra drivers included.
• Built credential tooling and pay-by-link onboarding for multi-party merchants.

Executive reporting where the slow part was assembly, not analysis — made repeatable, then the summarising handed to a model.

• Built data transformation pipelines feeding executive reporting and analysis.
• Prototyped an AI summarisation proof of concept for categorising client presentations.
• Translated operational requirements from stakeholders into usable data insight.

Recommenders and classifiers deciding what a member sees — one doubled engagement, and the pipeline behind it got cheaper to retrain.

• Built a recommender system on Databricks, Snowflake and PySpark to raise user lifetime value.
• Shipped a feedforward neural network classifier that doubled engagement across Nike platforms.
• Refactored ML pipelines and cut redundant data sources, reducing cloud cost and build times.