Freelancer profile translated to English.
Back to original languageAbout Julien
Full-Stack & AI Integrations Developer
I design and build production web applications: Angular front-end, Java/Spring Boot or Node.js/Symfony back-end, AI integrations, and workflow automation.
What I do well:
• Modern Front-end — Angular (SSR, TransferState, i18n), cross-platform mobile via Capacitor
• Java Back-end — Spring Boot, Hibernate/JPA, microservices, batch processing, Gatling tests, GCP/Kubernetes
• Web APIs — Symfony/API Platform, Node.js/Express, MongoDB & PostgreSQL, real-time WebSocket
• AI Integrations — agents with structured instructions and custom skills (Claude, MCP, function calling), LLM pipelines, production-oriented prompt engineering
• Automations — n8n workflows (LinkedIn, Pennylane, Strava, Salesforce), multi-service synchronizations
Recent Projects:
🏃 Trainwise — Solo-developed running coaching app: AI-generated training plans, Strava sync, coach/athlete dashboard with WebSocket chat, push notifications, Stripe subscription. Angular + Node.js + MongoDB + Capacitor.
🏢 Galec/Leclerc (Sopra Steria) — Back-end: Spring Boot 3.x migration, integration batchs. Java/Spring Boot + Hibernate + GCP.
🎫 Spotlag — B2B event platform: Angular SSR, PDF generation, i18n. Symfony + Docker.
📧 Salesforce Templates — 12 responsive email templates from Figma for multi-channel campaigns.
⚙️ n8n Workflows — LinkedIn post automation, Pennylane integration, multi-API orchestration.
Stack: Angular · TypeScript · Java/Spring Boot · Node.js · Symfony · MongoDB · PostgreSQL · Docker · GCP/Kubernetes · n8n · LLM APIs (Claude, OpenAI)
Available for development and AI integration missions. Have a web project in mind? Let's discuss it 👇
French
Native or bilingual
English
Conversational
Remote only
Primarily works remotely
Experience
- Sopra SteriaFULL STACK DEVELOPERDIGITAL AND ITSeptember 2025 - Today (9 months)Bordeaux, FranceCollaborating within the E.Leclerc group, I am working on an internal product replenishment management tool.My role covers:• Ticketing & Maintenance: incident resolution, continuous improvement, and user request tracking• New Feature Development: design and implementation of modules to optimize replenishment processes• Performance & UX Improvement: optimization of the existing tool to meet business needsWhat I bring: a rigorous, solution-oriented approach, and concrete experience in developing business tools with significant operational impact.
- SPOTLAGFULL STACK DEVELOPERSeptember 2024 - August 2025 (11 months)I had the opportunity to collaborate with Spotlag, an event industry company, on several projects aimed at improving and evolving their digital tools:• Development of new features for the website and project management platform• UI/UX Optimization to enhance the experience for internal and external users• Maintenance & Evolution: technical monitoring, bug fixing, and continuous improvement integrationConcrete experience combining development, functional design, and support for a business team in the event sector.
- ALCATEL-LUCENT ENTERPRISEFRONT-END DEVELOPERAugust 2023 - August 2024 (1 year)Internship - Bachelor's Degree (L3)Technical Stack: TypeScript-AngularCreation of a tool for analyzing call logs & ticket management.
Reviews
D
David
Création d'un plugin Minecraft - Tip4Serv
Reviewed on 2/5/2026
Frankly, he was fantastic. I provided him with specifications describing the plugin's objective and the tests to perform, and he delivered a bug-free plugin within the deadline. He thought of everything and put himself in the end-user's shoes. Communication was very clear, and I am delighted. He saved me valuable time.
Cedric
Directeur Artistique - BeFree
Reviewed on 12/8/2025
Recommendations
LS
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Education
- Master of Data Science & AIEPITECH2026Master of Science - Big Data
- Professional Bachelor's Degree (L3)INSPE2024Licence Professionnelle (L3)