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Guillaume Roche-BayardGR

Guillaume Roche-Bayard

Founding Software Engineer

€1,000/day
Paris, FR
8-15 years

Average response time: 1 hour

About Guillaume

Passionné par le code depuis l'âge de 12 ans, j'ai transformé cette passion en une expertise solide de près de 10 ans en développement frontend.

Au fil de mes missions, j'ai eu l'opportunité de piloter des équipes frontend, d'accompagner des développeurs juniors et de livrer des interfaces web performantes, intuitives et orientées utilisateur. Je ne me contente pas d'écrire du code propre — je m'assure que chaque projet apporte une vraie valeur ajoutée, aussi bien pour les utilisateurs finaux que pour les organisations qui me font confiance.

Ce qui me distingue ? Une veille technologique constante, une forte capacité d'adaptation et une vision centrée sur l'expérience utilisateur. J'interviens aussi bien sur des projets from scratch que sur des bases de code existantes, avec le même niveau d'exigence.

Vous cherchez un freelance frontend fiable, autonome et force de proposition pour votre scale-up ou votre produit digital ? Parlons-en.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Phacet
    Founding Software Engineer
    March 2025 - Today (1 year and 3 months)
    Paris, France
    Phacet helps operations, finance, and product teams automate high-volume document workflows by deploying AI agents (Phacets) on their real business
    data — powered by LLMs, business rules, and Python, with built-in human oversight.
  • Matera
    Tech Lead Front & Chapter Lead
    September 2022 - March 2025 (2 years and 6 months)
    Paris, France
    • - Led the complete overhaul of a critical segment of the product, transforming the document interface from a static document UI to a drive-like experience. This involved a recode of drag & drop functionality and enabled document/ folder drop from the OS.
    • - Collaborated with the CTO to create a dedicated frontend chapter to address technical needs based on product roadmaps and conduct essential architecture reviews.
    • - Streamlined our tech stack by replacing Yarn, Lerna, and npm workspace with PNPM, Vite, and TurboRepo.
    • - Created a comprehensive design system with a focus on accessibility, developer experience (DevX), and lightweight code. Integrated with Figma and Storybook to facilitate a seamless designer-developer interaction.
    • - Conducted multiple streaming sessions and peer coding sessions, investing approximately 20 hours in knowledge sharing to enhance the team's technical expertise.
    • - Managed the technical frontend roadmap, ensuring alignment with project objectives and actively researching new technologies and conducting proof-of concepts (POCs) to assess their viability.
    • - Authored best practices with Loom examples and documentation to explain each architectural and technical choice.
  • Matera
    Software Engineering Manager
    March 2022 - September 2022 (6 months)
    • - Stepped into the role of Software Engineering Manager to provide critical support to the team during a transitional phase.
    • - Leveraged prior managerial experience to ensure a smooth transition and effective squad changes within the organization.
    • - Assumed a leadership role in managing a team of backend developers, demonstrating adaptability and technical expertise in Ruby to effectively guide and support the team.
    • - Collaborated with both frontend and backend teams to maintain productivity and ensure project goals were met.
    • - Supported and guided individual contributors, fostering a culture of teamwork and accountability.

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Education

  • TOEIC - Anglais 950
    TOEIC - Anglais 950
  • Master en informatique
    EPITECH - European Institute of Technology
    2017
    Master en informatique

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