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Leonidas JeremyLJ

Leonidas Jeremy

AI Automation & Custom Business Apps | SMEs

€500/day
3 projects
Bruxelles, BE
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Leonidas

You're piling up SaaS, your teams are copy-pasting between 5 tools, and nobody knows where the right data is?


I build the tool that replaces all of that. Custom business application, AI automation, integration into your existing systems. Fixed price, code delivered, no lock-in.

What my clients have achieved concretely:

Garago (Automotive SaaS): Custom business DMS developed solo. Savings of €2,833/month per client compared to third-party platforms.


Chift (FinTech): Critical API connectors (PayPal, QuickBooks, Teamleader, Axonaut). Unified financial flows for hundreds of companies.

Antipop (Audio): Audio collaboration platform for artists. 12 clients signed from the first demos.

Stack: Next.js, Python, TypeScript, FastAPI, n8n, PostgreSQL. I work with startups, VSEs, and SMEs in Belgium and France.

Have a problem to automate? Describe it in 3 lines, I'll get back to you with an initial analysis.
  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Bruxelles (up to 50km), Braine-l'Alleud (up to 50km), Anvers (up to 50km), Gand (up to 50km), Lille (up to 15km)

Experience

  • iMapper
    Full Stack Developer
    ARCHITECTURE AND URBAN PLANNING
    October 2025 - Today (8 months)
    Orsay, France
    Stack: Python, Flask, React, JavaScript, PostgreSQL, AWS, WebAssembly, Three.js

    Intelligent laser mapping SaaS platform for floor plan creation.
    • Frontend migration: transforming legacy code to React with UI redesign
    • Backend performance optimization on a legacy Python/Flask codebase
    • Development of new features for the point cloud visualization platform
    • Code review and pull request validation to improve quality and maintainability
    • Improvement of the existing platform's architecture and performance
    flask Python React.js Python Programming JavaScript
  • Antipop
    Full-Stack Developer
    SOFTWARE PUBLISHING
    August 2025 - Today (10 months)
    Brussels, Belgium
    Stack: TypeScript, Next.js, NestJS, Node.js, PostgreSQL, Stripe

    Audio collaboration platform for artists and sound engineers

    Secure sharing of stems with timestamped feedback and real-time collaboration

    Professional audio player with A/B testing and version management

    Secure architecture with magic links.

    Rapid market validation: 12 clients signed from the first demos, DJ Tomorrowland interested as an ambassador
    Next.js Next.js Developer NestJs Stripe PostgreSQL
  • PureriseAI
    Python/Odoo Developer
    SOFTWARE PUBLISHING
    July 2025 - September 2025 (2 months)
    Braine-l'Alleud, Belgium
    Stack: Odoo, Python, JavaScript, SCSS, PostgreSQL, Stripe, Instagram API

    Design and development of a creative AI SaaS for viral content generation

    AI Training Module - Free masterclasses to master visual and video creation AI tools with interactive tutorials

    Inspiration Feature - Viral content inspiration search engine with Instagram API integration and filtering by media type

    Resources System - Library of automations, viral and creative hooks to optimize content production on Instagram/TikTok

    AI Assistant Module - AI assistant for generating optimized prompts (Text-to-Image, Image-to-Video, Text-to-Video) with intelligent suggestions

    Learning Platform - Learning system with downloadable resources and structured paths for entrepreneurs

    Freemium subscription system with Stripe integration, premium access management, and analytics dashboard for user performance tracking
    odoo Python Developer JavaScript Stripe Python

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Education

  • Web developer
    BeCode
    2022
    Full Stack Dev Web Junior

Skill set

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