Freelancer profile translated to English.
Back to original languageAbout Julien
Hello!
Fullstack developer with 12 years of experience, I now specialize in integrating AI models (LLMs) into business applications.
This specifically includes:
- Precise needs assessment to implement the most suitable solution
- Connection to LLM APIs (Anthropic/Claude, OpenAI, and Gemini models in particular)
- Precise monitoring of costs and performance
- Construction of adapted prompts, following best practices recommended by model providers (prompt engineering)
- Task automation, construction of complex pipelines
- Calling external functions & services (function calling)
- Use of structured outputs (JSON) for compatible models
- Use of image models (nano banana, gpt-image) for image generation or editing
- Control and evaluation of LLM results, to ensure the reliability of responses
- Development of AI agents
I have been working on applications using LLMs for 4 years now, on issues of data classification, anomaly detection, information extraction, and content generation.
I graduated from an engineering school with a specialization in Data Science & Machine Learning (TELECOM Nancy + Aalto University, Finland).
As a web developer, I work daily with the following technologies: Typescript, Python, PostgreSQL (and Supabase), Hono, and Nuxt/Vue.
I can write/speak/understand and work in English.
See you soon!
English
Native or bilingual
French
Native or bilingual
Can work on-site
Paris (up to 50km), Paris (up to 50km), Saint-Brieuc (up to 50km), Brest (up to 50km), Nantes (up to 50km)
Experience
- WisewandAI DeveloperJanuary 2025 - Today (1 year and 7 months)Development of an automated system for content creation via AI, integration of several LLMs and external APIs, data aggregation and valorization, control and evaluation of results.
- PrestaSafe
On Malt
Development of interface blocks for e-commerce siteDecember 2023 - December 2023Template system for UI blocks for e-commerce site, development of multiple UI blocks - LWA SASDevelopment of a musical web applicationCONSULTING AND AUDITSNovember 2023 - November 2023 (1 month)Development of a musical awakening application, interactive, fun and animated web interface, mobile design
Reviews
Christophe
RDV.biz
Reviewed on 3/15/2024
Quick takeover, excellent remote work with complete autonomy.
Access to the repo, 2/3 explanations and a very fast push of the result.
Guillaume
PrestaSafe
Reviewed on 12/14/2023
2nd mission successfully completed! Julien is a rare gem in front-end development. I recommend him 1000%. Thanks again for the work done!
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Education
- Computer Science Engineer Degree, Specialized in Data Mining and Machine LearningTELECOM Nancy2015
- Master Thesis, Data Mining and Machine LearningAalto University, Helsinki, Finland2015