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Jonathan SagetJS

Jonathan Saget

Senior Javascript Developer

€667/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Jonathan

Geek, fell into IT when I was young, I chose this passion for my professional career, by going to EPITA, which allowed me to learn how to learn, to understand the technologies I use, to touch on different technologies, ... Developer for 10 years, I have acquired good technical knowledge. For 4 years, I have been doing personal development which has allowed me to extend my human skills (interpersonal, communication, ...), which has allowed me to bring even more added value to my missions.

Today, I like to bring value to my clients and help them achieve their projects. I don't just content myself with being a developer who takes care of his Jira, I see myself more as a partner who wants the project to succeed. To do this, beyond development skills and other related skills such as DevOps (Jenkins, Gitlab, Linux, AWS, ...), I bring human skills.

Knowing how to communicate, adapting one's speech to one's audience, being proactive, presenting and defending one's ideas, while being open to discussion, helping one's colleagues, by helping them to increase their skills on a technology/framework, by doing pair-programming or simply by asking questions about their code (#duck).
Fostering team cohesion through team breakfasts/lunches/snacks, or expanding it with other teams we work with.
I like to have a global vision of the project, which allows me to be proactive on the tasks to be carried out (encouraging my teammates to review merge requests, weekly delivery for staging, creation of the version in Jira after a delivery to input tickets on the correct version, ...).

PS: I prefer backend development (Node.js) but I also do fullstack (Aurelia, React, Vue).
  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • padoa
    Full Stack Engineer
    February 2025 - February 2026 (1 year)
    Hôtel de Ville, Paris, France
    Details of achievements:
    • - Made modifications and/or small features to gain expertise in the Padoa stack.
    • - Implemented a service to verify company information via the Pappers.fr API (tests, documentation).
    • - Developed a tool to retrieve company information via the data.gouv.fr API, handling call limitations per minute and the maximum number of results per request, by dividing the request into smaller sub-requests.
    • - Developed the interim interoperability micro-service, then integrated it into the Padoa solution, enabling the creation of visit exemptions for temporary workers.
    • - Participated in the reflection and scoping of the technical solution for sharing DMST.
  • France Télévisions
    Backend Tech Lead (Node.js)
    January 2021 - December 2025 (4 years and 11 months)
    Residhome Paris Issy-les-Moulineaux, Issy-les-Moulineaux, France
    Details of achievements:
    • - Gained expertise in undocumented applications with no existing references.
    • - Functional and technical scoping with stakeholders to understand the existing system, then determine real needs and the most suitable solutions.
    • - Designed and implemented services (API, worker, CRON) in TypeScript to abstract third-party services (Spideo, Adobe Campaign) and France Télévisions services.
    • - Created libraries used by various proxies, deployed on the private FranceTV repository (Nexus).
    • - Implemented authentication via JWT.
    • - Developed data catch-up scripts.
    • - Improved catalog update file creation batches via pipelines and transformer streams.
    • - POC to validate the migration of logs to Filebeat, requested by the architecture team.
    • - POC for project structure in clean architecture.
    • - Migrated PHP applications to Node.js.
    • - Implemented monitoring and KPIs via Newrelic.
    • - Set up CI on Gitlab.
    • - Implemented development best practices within the team (coding style, tests, documentation, pair programming).
    • - Wrote and updated application documentation, procedures, best practices, and various information related to or useful for the team.
  • Emeria Technologies
    Fullstack Developer
    May 2020 - June 2021 (1 year and 1 month)
    Paris, France
    The litigation team is responsible for developing the micro-service for managing litigation within the Millenium application (Foncia ERP).

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Education

  • Specialization in SIGL (Information Systems and Software Engineering)
    EPITA
    2010

Skill set

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