Jacques Perrin

Freelance / contract missions only, fully remote, from 550 EUR per day. I am looking for scale-up SaaS, AI, fintech or deeptech teams that need a lead backend, a fractional CTO or an architect for an AI / LLM platform: NestJS microservices, AWS and Terraform, production RAG. Formats: architecture audit, platform sprint, or a multi-month lead backend / DevOps engagement. Freelance backend and AI architect with 10+ years on critical backends, and partner and CTO at Cantem, a collective of senior independent developers from École 42. I design scalable NestJS microservice platforms, production LLM pipelines (LangChain, embeddings, RAG) and the AWS infrastructure behind them (Lambda, CDK, Aurora, SQS, Terraform, Kubernetes). Selected results: Legal LLM platform (Jimini AI): 8 NestJS + AWS Lambda microservices, 10,000+ legal queries per day, 500,000+ OpenSearch documents refreshed in under a minute, 99.99% uptime. AI-native dating app (Wingmate SAS, Amata): two releases shipped end-to-end (Australia beta, New York launch), OpenAI matchmaker, real-time BI cut from 8 hours to 30 seconds. AI video ad platform (Arcads): +18% conversion from A/B tests on 40+ page variants, critical load time cut from 2.6 s to 1.3 s. High-load iGaming platform (The Luck Factory): 50M+ line codebase, PHP modules about 25% faster, integrity kept across 100,000+ daily active sessions. Crypto wallet used by 700,000 users (Panteum): rebuild, microservices split and Kubernetes deployment. I work as lead backend, fractional CTO or AI platform architect: codebase onboarding in the first days, small reviewed PRs, monitoring and up-to-date docs. I work in English and French.