Freelancer profile translated to English.
Back to original languageAbout Jérémie
With a Master's in Management, an entrepreneurial mindset, and a decade of experience as a Senior Full-Stack Developer, including strategic consulting for global leaders (Ubisoft, Air France, Engie, BNP Paribas), I bridge the gap between business strategy and software engineering.
Today, I design scalable applications and decision-support tools. My technical expertise covers:
- Web & Mobile Development: Expert in JavaScript (React.js, React-Native, Redux).
- Back-End & API: Strong command of Node.js, Python, and FastAPI.
- Data & Cloud: Architecture on GCP and Azure, using SQL (PostgreSQL) and NoSQL (Firestore, MongoDB) databases.
- DevOps: Optimization of CI/CD pipelines and infrastructure.
Deeply involved in the tech community, I am a co-organizer of the React Paris meetup, fostering knowledge sharing. I apply the Software Craftsmanship philosophy in both my technical projects and in specialty coffee roasting at Sayang Coffee.
English
Native or bilingual
French
Native or bilingual
German
Basic
Indonesian
Conversational
Can work on-site
Paris (up to 15km)
Experience
- ENGIESenior Fullstack DeveloperENERGY AND UTILITIESOctober 2025 - Today (8 months)Courbevoie, FranceContributed to cross-functional projects within ENGIE’s France-Renewables Delivery Team, leveraging multiple technology stacks (React/FastAPI, .NET) across Azure and AWS, while collaborating in a multi-disciplinary environment spanning data, DevOps, cloud, and full-stack development.
- Project Scope: I maintained and improved two strategic applications for Engie Green: Référentiel Machine and Référentiel Bridage. These platforms serve as critical decision-support tools, designed to simulate and monitor the theoretical energy performance and acoustic impact of wind farm models to optimize the planning and installation of new sites using Python framework FastAPI, React and Azure DevOps.
- Project Scope: I developed a platform for strategic data valorization called Strat Data, in close collaboration with data engineers and DevOps, to enhance operational process reliability and enable data-driven decision-making using the Python framework FastAPI, React and AWS.
- Project Scope: I contributed to a feedback management platform used widely across the Engie organization called REX Management Tool, in collaboration with business stakeholders, to enhance knowledge capitalization, improve operational process reliability, and support the dissemination of best practices using DotNet/C#, Angular and AWS.
Achieved Results:- Improved release frequency and system reliability through automated CI/CD workflows.- Improve code quality among the team with code reviews, peer-programming, progressive unit and E2E test coverage and strict acceptance criteriasKey Responsibilities:- Full-Stack Development: Built responsive UIs and robust APIs using React, Angular, DotNet/C#, Tailwind, and FastAPI.- Data & DevOps: Managed PostgreSQL databases and automated deployment via GitHub Actions and Azure DevOps (CI/CD) and AWS- Agile Delivery: Collaborated in a Scrum environment to deliver iterative features for performance tracking. - Owly StudioReact Native Mobile DeveloperEDUCATION AND E-LEARNINGApril 2025 - Today (1 year and 2 months)Paris, FranceProject Description: Co-founded an innovative B2C startup developing an AI-powered Generative AI mobile application, offering hyper-personalized storytelling experiences for children.Responsibilities:- Led the entire software development lifecycle (SDLC), from system architecture design to production deployment.- Managed the product roadmap, translating functional requirements into scalable technical solutions while ensuring code quality through systematic reviews and Agile methodologies.Results:- Developed a high-performance iOS and Android application using React Native, TypeScript, Expo, and NativeWind (Tailwind CSS).- Architected a scalable PostgreSQL database hosted on Supabase (BaaS) to manage complex data models.- Successfully implemented Large Language Models (LLMs) for real-time personalized content generation.- Established robust CI/CD pipelines via GitHub Actions and EAS (Expo Application Services) for automated builds and deployments.- Deployed the iOS MVP on TestFlight for user testing and finalized the Android version, with an architecture ready to support high load (scalability).
- GandiSenior Fullstack DeveloperE-COMMERCEOctober 2020 - March 2025 (4 years and 5 months)Paris, FranceAs a Senior Fullstack Developer within the Billing squad at Gandi, my perimeter includes our e-commerce website, payment interface, billing dashboard and invoice generation.Key Responsibilities:- Spearhead the development of new features, graphic redesigns, and bug fixes.- Oversee priorities and followups of frontend tasks when it comes to maintenance and technical debt.- Coordinate new versions releases with DevOps team.- Mentor and keep engaged a junior developer.Achieved Results:- Designed and developed an on-the-fly PDF invoice generation tool.- Technical referent for tracking across the frontend apps at Gandi.- Maintained an in-house tool for updating and keeping track of domain prices.
Reviews
Fabien
MEETINEO
Reviewed on 3/12/2019
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Education
- Master in Management and Engineering of Information and Communication TechnologiesUPEM2015
- Bachelor's Degree in Mathematical and Computer EngineeringUPEM2013
Certifications
- SCRUM MasterInternational Scrum Institute2017
- TOEICETS Global2014