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Tristan GuérinTG

Tristan Guérin

Lead Full-stack Developer

€550/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Tristan

Passionate about web and mobile application development, I enjoy transforming ideas into concrete and high-performing products. AtCitron®**, where I evolved as **Lead Developer**, I contributed to the company's growth by designing and optimizing high-traffic web applications (ingesting and processing several million data points per day), with a focus on **scalabilityandresilienceof backend architectures. I also managed severalteamsandmentoredjuniors, which strengthened my adaptability to technical and organizational challenges.

In recent months, I have turned tomobile developmentwith Flutter and Firebase. My first application, **Whereez**, has just been released and continues to evolve.

✅ Web & Mobile Development (JS, Node.js, Flutter)
✅ Scalable and Optimized Backend Architecture
✅ Cloud Deployment
✅ Developer Support and Training

I am open to short or medium-term assignments, whether for an MVP, a technical redesign, project development, or support on performance and architecture issues.
Let's discuss your project! 🚀
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 10km)

Experience

  • Tigidev
    President
    June 2024 - Today (2 years)
    Development of the mobile application Whereez, a social geo-guessing game, a blend between a social network (like Instagram) and a geographical game (like Geoguessr). The goal is to challenge friends by having them guess where a photo was taken. The closest and fastest wins.
  • Pause professionnelle
    Professional Break
    January 2023 - May 2024 (1 year and 4 months)
    I took a professional break where I traveled with a backpack in South America for several months and then worked seasonally during a winter season as a ski technician (rental/sale of ski equipment).
  • Citron®
    Lead Full-stack Developer
    ENVIRONMENTAL
    April 2018 - January 2023 (4 years and 9 months)
    Île-de-France, France
    Citron® is a startup that supports major companies and local authorities in their energy transition. To achieve this, we offer innovative digital tools and consulting services tailored to our clients' challenges.

    My role at Citron® was to participate in the development of products related to energy monitoring and also in IoT, particularly in building management.
    As a lead developer, I managed a team with diverse profiles ranging from junior to experienced.

    My main challenges were the development of new features, the scalability of products and services (ingesting millions of data points daily), training and supervising my teams, and establishing the technical roadmap in collaboration with the CTO.

Recommendations

MP
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VC
Maxime Perthu and 2 other people have recommended Tristan

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Education

  • ECE PARIS
    2017
  • Exchange Program (Intercambio)
    Universidad Peruana de Ciencias Aplicadas
    2016
    Programme d'échange (Intercambio)

Skill set

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