You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Julien RavindrarasaJR

Julien Ravindrarasa

Lead Fullstack Developer

€480/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
Back to original language

About Julien

Do you have a complex technical challenge? I transform your business problems into high-performing, scalable, and ROI-oriented industrial solutions.

My approach combines technical excellence (AI, distributed architectures) and business pragmatism (automation, productivity gains, reliability).
My 3 pillars of intervention:

1. Generative AI & Vision (GenAI)
I design hybrid production pipelines (LLM + Diffusion) for high-fidelity "pixel-perfect" rendering.

Deliverables: AI Architectures (FLUX, FaceFusion, Gemma), inference optimization (ONNX, quantization), multi-GPU orchestration under Celery.

Expertise: Transitioning R&D workflows to scalable APIs.

2. Product Engineering & Fullstack SaaS
I develop your platforms from A to Z with a user-centric and performance-oriented vision.

Example: Creation of a BI SaaS (Next.js/Django) adopted by +15 car dealerships, saving 1 hour of administrative management per day per manager.

DataViz: Complex interaction modules for time series (D3.js).

3. Backend, Big Data & Legacy Modernization
I stabilize and scale your infrastructures when faced with large data volumes or aging systems.

Scalability: Management of 10,000 photos/hour flows (SFR Vision), Elasticsearch migration, and hybrid storage strategies.

Reliability: Migration of critical ERPs (.NET/SQL Server) and automation of "Gatekeeping" for railway systems (RATP).

Why work with me?
- Results-driven culture: My code serves one purpose: reduce your costs, automate your processes, or validate your Product-Market Fit.
- Engineering rigor: Experience with financial calculation engines (Pricing) and critical safety systems.
- Autonomy & Leadership: From UI/UX design on Figma to Docker deployment, I manage the entire technical chain.

Let's discuss your challenges to transform your vision into a high-performing product.
  • French

    Native or bilingual

  • English

    Native or bilingual

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

Experience

  • Hasoka
    Lead Fullstack Developer
    October 2025 - Today (8 months)
    Design and complete development of a decision support SaaS solution, automating car dealership reporting and consolidating heterogeneous data flows.

    Impact: Productivity gain of one hour per day per manager and successful deployment with over 15 dealerships from the MVP launch.
    Batch Processing System Integration Django Python Next.js
  • Architecte GenAI
    AI Engineer
    October 2025 - Today (8 months)
    Design and industrialization of a high-fidelity faceswap solution for professional photography, achieving "pixel-perfect" quality ready for printing.
    Testing and Quality Assurance Django Python Front-end Interface Development API
  • Travel Explorer
    .Net Software Engineer
    June 2024 - September 2025 (1 year and 3 months)
    • - GDS & Travel Tech Integration: Maintenance and evolution of critical gateways with international systems (Amadeus, Sabre) and the Orchestra platform.
    • - Heritage Preservation: Securing the group's software capital through structured skills transfer, eliminating dependency on legacy code.
    • - SQL Server Optimization: Redesign of data processing to reconcile archive integrity and sales flow fluidity.
    External API Integration Database Management System Integration CI/CD Management C#

Recommendations

Be the first to recommend Julien

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • MSc in engineering
    ESIEE PARIS
    MSc in engineering
  • Lycée Paul Valéry

Skill set

Categories