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Julie JaumaryJJ

Julie Jaumary

Python / Ruby Back-end Developer

€550/day
Lyon, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Julie

Back-end developer with 5 years of experience (including 3 at Alan), I design and make reliable what powers your applications: APIs, integrations, data processing, automation.

My specialty: before coding, I spent 7 years in accounting, payroll, and treasury. I don't just execute a spec – I understand the business logic and financial flows behind it. This is what allowed me, at Alan, to design a fraud detection stack that uncovered patterns no one had noticed.

Specifically, I work on:
- Back-end development (Python/Flask, Ruby on Rails)
- Integrations & middleware (e.g., Shopify ↔ logistics bridges)
- Data processing and analysis, anomaly detection
- Process automation
- API design and reliability

I work remotely, on a contract or fixed-price basis, for one-off or recurring projects. I am particularly comfortable with topics that combine technology with business or financial challenges – fintech, insurance, management tools.

Rigorous, methodical, and reliable, I strive to deliver clean code and quickly understand your context. Let's talk about your project!
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Make-A-Wish® France
    Volunteer Web Developer
    CIVIC AND SOCIAL ORGANIZATIONS
    January 2025 - May 2026 (1 year and 4 months)
    Paris, France
    For over ten years, Make-A-Wish France has been fulfilling the wishes of children and adolescents with serious illnesses. I decided to help them with their website during my career break.
    - Updating the Wordpress website (PHP, HTML, CSS)
    - Advice on the website's GDPR compliance
    Wordpress PHP GDPR
  • Alan
    Software Engineer
    BANKING AND INSURANCE
    June 2021 - June 2024 (3 years)
    Paris, France
    - Implementation of the fraud detection system
    - Development and maintenance of internal tools and the client administrator dashboard
    - Management of over 80+ engineers' staffing (cross-functional coordination, process improvement, documentation)
    - Contribution to product decisions involving multiple stakeholders
    Python SQL API Amazon Web Services Data Processing
  • Maestrooo
    Ruby Back-end Developer
    E-COMMERCE
    September 2020 - April 2021 (7 months)
    Paris, France
    At Maestrooo, a Shopify application editor, I developed middleware solutions linking merchants' Shopify stores with their logistics services. My role was to design and ensure the reliability of these integration bridges to automate order, payment, and data flows between the two systems.

    Technologies:
    - Ruby (Serverless framework: Ruby on Jets)
    - AWS (Lambda, DynamoDB, CloudWatch, S3, CloudFormation, etc.)
    Ruby on Rails Amazon Web Services Shopify Middleware API

Recommendations

Lucie JosephLJ
FS
VL
Lucie Joseph and 2 other people have recommended Julie

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Education

  • Bachelor's +4 in Web Development, Ruby on Rails
    Le Wagon
    2019
    Bac +3/4 Développement Web, Ruby on Rails
  • University Diploma in Payroll Management
    Aix-Marseille University
    2015
    DU Gestion de la Paye

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