Freelancer profile translated to English.
Back to original languageAbout Billele
Looking for a backend PHP Symfony developer capable of building reliable, performant, and scalable systems — without needing to explain everything twice? That's exactly what I bring.
With 6 years of experience on high-stakes projects (nuclear supervision at EDF, FoodTech platform with +300,000 users, 3D modeling MedTech application), I work on both scratch projects and critical migrations, performance optimizations, or architecture overhauls.
What sets me apart: I'm not just "backend". I understand the product, I collaborate with POs, business teams, and designers, I mentor junior profiles, and I lead client demonstrations. I also integrate AI tools into my daily development routine — Claude, Claude Code, Cursor — in a reasoned way, to speed up delivery without sacrificing code quality. You'll have an interlocutor who values efficiency as much as craftsmanship.
I handle missions such as: design and development from scratch (Symfony, REST API, DDD), application redesign or migration (Sylius, Symfony), backend and database performance optimization, CI/CD and observability setup (Datadog, Sentry), payment integration (Stripe / Stripe Connect), or technical lead for a multidisciplinary team.
Available remotely or hybrid from Lyon. Feel free to contact me to discuss your needs.
French
Native or bilingual
English
Fluent
Can work on-site
Lyon (up to 20km), Saint-Priest (up to 10km)
Experience
- The Meal Prep / PrepMyMeal.frLead Backend Developer PHP Symfony 7.4 & Vue.js 3 100% remoteHEALTH AND WELLNESSMarch 2024 - Today (2 years and 5 months)As part of a 100% remote freelance mission, I took charge of the migration and evolution of a high-traffic FoodTech platform (+300,000 users), combining e-commerce, meal plans, and a social space.I led the Shopify → Sylius migration (PHP 8.4 / Symfony 7.4), which reduced third-party dependencies, stabilized the subscription process, and decreased functional tickets by approximately 20%.I optimized the REST API and Vue.js components, improving response times from 100 to 150 ms (measured via Datadog). I implemented asynchronous processing with Symfony Messenger + RabbitMQ for orders and notifications, as well as Mercure for real-time message broadcasting. I also integrated Stripe / Stripe Connect, reducing payment errors by 10-15% through better webhook management.I provided application monitoring (Datadog, Sentry), collaborated closely with the CTO and the Product team, and acted as a referent for 3 intermediate developers, reducing code review returns by 25%.
- EDFBackend Developer PHP Symfony 6.4 & Lead Developer Vue.js 3ENERGY AND UTILITIESDecember 2020 - March 2024 (3 years and 3 months)Lyon, FranceLong-term mission in a sensitive industrial context: complete redesign of a nuclear supervision application used by over 30 internal operators, within a multidisciplinary team of 8 people — 2 backend developers, 2 full-stack developers (including myself as JS lead), 1 PO, 1 project manager, 1 QA, and 1 business manager.As the technical lead for JavaScript, I managed the jQuery → Vue.js migration, reducing front-end debt and simplifying components by about 40%.On the backend side, I designed and developed a Symfony 6.4 REST API using DDD architecture, which reduced Oracle anomalies by approximately 25%. I also carried out a major optimization of Oracle SQL queries: processing times decreased from 60+ seconds (or even timeouts) to about 3 seconds for large volumes.I implemented real-time functionality via WebSocket / SSE (saving 200-300 ms on critical screens), industrialized CI/CD (GitLab + Jenkins) with a 30% reduction in deployment-related issues, and implemented enhanced application traceability. I led client demonstrations at the end of each 2-week sprint, ensuring continuous alignment between technical deliveries and EDF team expectations.
- Startup 3D TotemBackend Developer PHP Symfony 5 & Vue.js 2MEDICALSeptember 2019 - November 2020 (1 year and 2 months)Lyon, FranceFirst startup experience in a demanding sector: I contributed from start to finish to the design and development of a MedTech platform automating the workflow between 3D modelers and dental technicians for the manufacturing of custom dental aligners.On the backend side, I designed the architecture in DDD with a Symfony REST API (3.4 → 5.0): managing quotes, orders, business workflows, and automated generation of clinical PDFs — high-stakes data requiring reliability and precision.On the frontend, I developed Vue.js interfaces with Webpack Encore, including interactive tracking screens. A highlight of the mission: I integrated a complete 3D module in Three.js for visualizing and manipulating dental models directly in the browser — a rare and differentiating feature in this ecosystem.Large volumes of data (3D models, clinical metadata) were managed via MongoDB, adapted to storage and performance constraints. I also handled hosting and full deployment on an OVH VPS, in direct collaboration with the UX/UI Designer — a full-stack experience with high responsibility, right from the start of my career.
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Education
- RNCP Level 5 Title (Bac +2)STUDI Digital campus2020Titre RNCP niveau 5 (Bac +2)
- C# .netGLOBALKNOWLEDGE2019C# .net