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Amaury RousseauAR

Amaury Rousseau

Back-end Developer

€600/day
2 projects
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Amaury

Passionate developer since childhood, I have specialized mainly in back-end and system development. I primarily use Java, Scala, Node.js, Go, C/C++ when I choose, but I naturally have the necessary experience to work with other languages if needed.

I also have solid knowledge and experience in Linux system administration, virtualization and containers (Docker, LXC, Proxmox), and networking.

CI/CD tools (GitLab, GitHub, Jenkins) and intensive testing are an essential part of the professional quality projects I deliver.

Feel free to contact me if you have any questions or need further details about my profile and what I can offer. :)
My GitHub profile also contains some interesting projects, including some from a former employer (Blindnet) that I created and maintained.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 30km)

Experience

  • Leadbay (YC F25)
    Lead Software Engineer
    June 2023 - Today (3 years)
    Paris, France
    Early team member at an AI-driven startup building lead recommendation models for SMEs.
    ○ Designed and built the backend architecture from scratch using Kotlin and PostgreSQL
    ○ Implemented subscription and usage-based billing logic, integrating Stripe and building
    internal usage tracking pipelines
    ○ Co-led hiring and helped build a cross-functional tech team (backend & frontend)
    ○ Defined technical stack and ensured backend reliability, scalability, and maintainability
    ○ Took over frontend leadership after the departure of the original frontend developer
    ○ Oversaw deployments on Azure and managed infrastructure and DevOps tasks
    ○ Maintained active development role while taking on team leadership responsibilities
    ○ Contributed to Leadbay’s acceptance into Y Combinator (F25)
    Kotlin PostgreSQL
  • blindnet
    Software Engineer
    January 2022 - February 2023 (1 year and 1 month)
    Contributed to the development of an open-source privacy and data traceability devkit,
    providing public APIs and self-hostable services for GDPR compliance and data encryption.
    ○ Co-designed the technical architecture for the new product version with the core team
    ○ Built backend components in Scala with a pure functional programming approach
    ○ Developed Java SDKs to interact with the backend services
    ○ Co-authored API specifications and design documents
    ○ Led the migration from Google Cloud to Azure, and managed production deployments

Reviews

5.0

Out of 1 rating

G

Green

GreenMinded

Reviewed on 7/14/2025

Our association has been working with Amaury for years to manage our website and server. Amaury is competent, reliable, and responsive (in addition to being nice!) we recommend him without hesitation :)

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Education

  • Master Reliability and Computer Security
    Aix-Marseille University
    2022

Skill set

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