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Jonathan SerraJS

Jonathan Serra

Backend Engineer - Golang (Go) Expert | CICD

€600/day
Périgueux, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Jonathan

With over 12 years of experience as a CTO and technical manager, I translate your business vision into a robust and scalable technology strategy. My goal: to build software solutions that have a real impact on your market and empower your ambition.

I work on complex projects, from defining the architecture to putting it into production, including managing teams. My background in demanding sectors (Fintech, Healthtech, Adtech) allows me to quickly understand your challenges and offer you pragmatic solutions.

My key areas of intervention:

  • **Strategy & Technical Leadership**: Roadmap definition, alignment of tech with product objectives and management of development teams.
  • **Software Architecture**: Design of distributed systems, SaaS architectures and highly available and scalable platforms.
  • **Golang & DevOps Expertise**: High-performance backend development in Go and implementation of a DevOps culture (CI/CD, Infrastructure as Code) for smooth and secure deployments.
  • **AI & LLMs Ecosystem**: Integration of language models (LLM), development of applications with Langchain, and optimization of prompts for business use cases.

My conviction is that the success of a project relies on clear and effective communication. I adapt my speech to my interlocutors, always prioritizing clarity and efficiency to achieve our common goals.

Ideally, I am looking for medium-term collaborations (3 to 6 months), with an investment of 2 to 3 days per week to bring you continuous expertise and maximum value.

Ready to discuss your technical challenges? Contact me so we can discuss your project.
  • English

    Fluent

  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Masteria
    CTO
    July 2025 - Today (11 months)
    Masteria is an AI-based coaching platform designed to help coaches grow their business by managing over 100 clients. The tool analyzes client data (calendars, progress, behavioral patterns) to provide personalized and large-scale insights. It automatically captures client progress, session notes, and habits, while AI analyzes these patterns to generate personalized feedback. This allows coaches to increase their revenue by managing more clients with the same effort.
    Consulting
  • Gocoworker
    Chief Technology Officer
    October 2024 - Today (1 year and 8 months)
    Paris, France
    DAO of Talents. Manage digital services through Talent, rather than companies. Sustainable creation of the job of your dreams, safely, with communal work!
  • Stan App
    Chief Technology Officer - Software Engineer @Brightweb
    December 2019 - Today (6 years and 6 months)
    Île-de-France, France
    We are three founders to build the way to understand the Web of tomorrow. Our goal is to make buying on the Web obvious with a simple journey without having to re-enter your delivery and card information. Our topics:
    - Private data;
    - Card payment and card tokenization;
    - Safe and simple checkout;
    Docker

Recommendations

Clint NetworkCN
Thomas P.TP
FU
Clint Network and 2 other people have recommended Jonathan

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Education

  • Engineer, Software Project Management
    Université de Technologie de Troyes
    2016

Skill set

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