William Hoareau

Backend Software Engineer with 4+ years of experience building scalable, production-grade systems across AI/GenAI platforms, blockchain infrastructure, and enterprise consulting. I specialize in designing robust APIs and backend services (FastAPI, NestJS, Node.js) integrated with cloud infrastructure (Google Cloud, AWS) and modern data stores (PostgreSQL, MongoDB, Redis, Pinecone). At IBM, I built end-to-end backend systems for a GenAI knowledge platform used by L'Oréal. Architecting RAG pipelines (ingestion, chunking, vectorization, LLM generation) and multi-agent workflows that improved query accuracy and reduced hallucinations at scale. I later pivoted into blockchain engineering, applying the same backend rigor to smart contract systems, auditing protocols securing up to $500M in assets (Lagoon, Amphor/MEV Capital) and ranking top 25 in international security competitions across 4,000+ competitors. A track record that reflects strong systems thinking, attention to edge cases, and a security-first mindset I bring to all backend work. I'm looking for a backend engineering role where I can own API design, cloud architecture, and data infrastructure for a product-driven team, ideally with room to apply AI/ML integration or blockchain expertise where relevant.