Freelancer profile translated to English.
Back to original languageAbout Guillaume
Senior Product Engineer with over 20 years of experience designing end-user products (SoundCloud, Dance), with an impact-driven product approach.
I use agentic coding (Claude Code, etc.) to accelerate development while applying best practices in software engineering.
My strengths: • Full-stack product engineering • Native Android • Collaboration with product and design teams • AI feature integration – I am currently developing an auto-classification/response assistant.
Ideal profile: Seed/Series A startups and product teams needing rapid senior contribution.
Available for freelance missions, remote work preferred.
Recommendations (from LinkedIn):
- I had the chance to work with Guillaume on a highly technical AI mobile project, and I couldn’t have asked for a better collaborator. What should have taken three weeks, he accomplished in one with precision, clarity, and incredible attention to detail. Guillaume doesn’t just write code he architects thoughtful, scalable solutions with a strong sense of design and user experience. [...]
- Guillaume is one of the very rare true full-stack developers, with extensive Android, Web, and backend experience. He's done it all, and at scale! [...] At Dance, Guillaume worked across our entire stack, shipping important user-facing features and improving the development experience with an elaborate test user infrastructure that he pitched and delivered. [...]
- Guillaume has consistently been lifting the team upwards by bringing great expertize and skills around technology and processes. His team spirit, dedication, passion for the project also provides a constant boost to the entire team.[...]
- Guillaume has a curious mind that allows him to naturally grasp technological evolutions, and shows great pragmatism in his work while being very rigorous. [..]
French
Native or bilingual
English
Fluent
German
Conversational
Can work on-site
Bordeaux (up to 10km), Paris (up to 10km)
Experience
- freelance - cannot discloseSenior Software Engineer (Frontend & Gen-AI)July 2025 - July 2025Build a Proof of Concept for a startup creating an application centered around a chatbot. Personalize the chatbots' with custom prompts and a set of documents. Elevate the LLM responses into custom UI, including call to actions and UI widgets.
- freelance - ra-inSenior Software Engineer (Backend & Frontend)September 2024 - June 2025 (9 months)• Backend: Python, FastAPI, Pydantic, pytest, Google Cloud• Frontend: Next.js. React, TypeScript, Chromatic, Figma, Token Studio , Style Dictionary, Tailwind, Jest, eslint, Vercel
- freelance - dance.coSenior Software Engineer (Android)September 2024 - Today (1 year and 11 months)Build an Android application for user support and to manage some of their e-bike functionality. I am the sole Android engineer in a team of 3 software engineers.
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Education
- EngineerEPITA2005