Luis S.

Senior backend engineer, I work on three topics that SaaS teams often set aside due to lack of time or specific internal skills:

→ Modernizing legacy codebases.Migrations from Lumen, old Symfony, or Laravel 5.x to modern Laravel, without freezing the roadmap or breaking production.

→ Integrating AI features into production.RAG, semantic search, LLM agents connected to your existing Laravel applications, with controlled cost and latency.

→ Data infrastructure for SaaS.AWS pipelines (S3, Lambda, Glue, DuckDB-WASM) designed to remain maintainable by your internal team.

• Complete migration of a multi-tenant SaaS to Laravel — platform used by several major European foundations.

• Migration of a REST API from Lumen to Laravel.

• Implementation of static analysis (PHPStan) on backend + API; parallelization of the CI/CD pipeline.

• RAG Chatbot in production: chat.luismgspro.com.

• AWS data pipeline (S3 → Glue → parquet → DuckDB-WASM on the browser side) for multi-tenant SaaS.

Method:I start with a short 3-to-5-day diagnosis to frame the mission based on facts, not assumptions. I then write the action plan, execute it autonomously, and deliver clean code that your team can take over without hidden dependencies. Your internal developers remain focused on the product roadmap while I advance on the topic in parallel.

For whom:SaaS publishers, scale-ups, and established product teams. Missions from a few days to several months, remotely from Toulouse, with clients in France, Belgium, the UK, and more broadly in the EU.

If you have a backlog item that's been pending or a blocked project, write me a few words about what you've tried and what's holding you back — I'll get back to you with an initial analysis.