Philippe Reynier

Two profiles in one: 25 years of backend C++, and AI integration shipped to production. There are plenty of C++ developers. There are plenty of AI developers. Very few have delivered both — in production, end to end.

On the C++ side: 25 years of systems where failure is not an option — real-time trading (FIX protocol), telecom middleware (SMPP, Tuxedo), financial transaction monitoring. I take on the parts that have to be fast and exact.

On the AI side: concrete results, not prompt talk. I put an LLM inference service (Mistral-7B) into production that automatically classifies 75% of the IT tickets of the city of Tournai, and I built an MCP (Model Context Protocol) server, published on npm, that connects Claude to an exact computation engine.

The proof: ultimath.ai — designed, built, deployed and operated solo. A mathematical computation engine that evaluates every expression on 5 independent numerical engines (FLINT multiprecision, 50-digit decimal, IEEE-754, MPFI interval arithmetic, NTL) and has them cross-check each other. Async REST API (C++ / Drogon), gRPC, PostgreSQL, flex/bison parser, TypeScript MCP server. Live — you can try it in 30 seconds.

What I can do for you:

High-performance C++ backends: APIs, microservices, real-time, numerical computing

Connecting your systems to LLMs: MCP servers, tool use, inference services

Taking over, hardening and evolving business-critical legacy C++

Based in Belgium, fully remote. CET time zone — works well with EU and US East teams.