LUKE TAAFFE

Deliver full-stack, AI, and data systems for FinTech, DeFi, and enterprise clients, owning features end to end from requirements through CI/CD and production support. Contracted for ZiffDavis on VoucherCodes (~4.9M MAU, 5k+ brands), working on join-heavy legacy voucher data remodelling and planning phased migration off a legacy API. Built a Python and LangChain multi-agent RAG system for a law-firm client using Pinecone with hierarchical indexing and context management, reducing case-file review from hours to minutes. Engineered a Node.js/TypeScript indexer for a DEX with a PostgreSQL event store, block reconciliation for gaps and reorgs, Redis hot caching, and a WebSocket gateway to maintain durable, consistent real-time datasets. Designed and shipped agentic and workflow automation systems using OpenAI API, LangChain, n8n, and Supabase, and deployed containerised services with Kubernetes, Terraform, and CI/CD with strong observability and release practices.

Led the Growth engineering domain at a regulated Netherlands crypto exchange. Built Kafka and RabbitMQ pipelines in Node.js/TypeScript and Go processing millions of real-time events across 150+ assets with idempotency to ensure no duplicates, plus load testing. Led a two-quarter migration from AWS Lambda to Kubernetes, delivering multiple microservices with zero major incidents. Built event-driven integrations with Kafka and PostgreSQL, set up monitoring with Prometheus and ELK, and scaled the domain from zero to 13 engineers by establishing coding standards, quality gates, delivery processes, and mentorship for architecture and production troubleshooting.

Built GraphQL API microservices for behavior-driven recipe categories using TypeScript and NestJS on Kubernetes with Grafana and ELK. Designed and delivered a back-office automation application that eliminated five customer service roles and reduced annual operational cost. Developed an in-house Kafka microservice in Node.js, introducing distributed systems architecture and Kubernetes practices across the engineering department.