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Kevin StzlKS

Kevin Stzl

🔥 Python Backend Engineer · Automation · APIs

€400/day
Lannion, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Kevin

I build robust backends and automation systems that save time and money, concretely.

I started at Sogitec (a subsidiary of Dassault Aviation) on military flight simulators, where a bug is not an option. At Sogitec, I designed a Python code generation tool that saved 2 to 3 hours per person per week. I bring this reflex of automating what takes time to every mission.

💡 What I do:
REST and async APIs · Django · FastAPI · Redis · Celery
Python Automation · RPA · custom scripts
AI Integration · LLM agents · OpenAI
CI/CD · Docker · Railway · production deployment

📈 Concrete results:
+100 clients and +34 Google reviews in 30 days via complete automation for an artisanal business (Garel Couture)
High-volume Django SaaS with WebSockets, Redis, and Celery (LP Consulting)
Real-time Go backend for multiplayer VR experiences (Garuda Production)
Internal Python tool at Dassault Aviation: 2 to 3 hours saved per person per week

🤔 Why me:
I understand the problem before coding the solution. I adapt quickly, communicate clearly, and deliver concrete results from the first weeks. No disposable code, no surprises at the end of the sprint.
What my clients remember: responsiveness, adaptability, measurable results.

📩 Feel free to contact me, I respond in less than an hour!
  • English

    Fluent

  • French

    Native or bilingual

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

Experience

  • GARUDAPRODUCTION
    Unreal Engine/Electron/React Developer, Sound Designer
    VIDEO GAMES AND ANIMATION
    September 2025 - Today (9 months)
    Applications & Network:
    • Development of Electron / React applications
    • Management of real-time network communication between Electron and Unreal via sockets
    • Optimization of internal processes using Python scripts to automate and accelerate deliveries
    • Technical support for the client in defining and choosing solutions
    • Creation of backend servers in Golang for multiplayer and optimized network replication in VR

    Unreal Engine:
    • Development of VR experiences under Unreal Engine (HTC Headsets)
    • Creation of user interface animations
    • Synchronization between audio, 3D animations, and interfaces
    • Optimization of performance and production pipeline
    • Management of client deliveries and deliverables
    • Creation of internal tools in Python for debugging and improving productivity

    Sound Design:
    • Creation of sound design under Reaper
    • Management of the overall sound ambiance
    • Design and integration of interface sounds
    Unreal Engine Unreal Engine 5 Virtual Reality Sound Design React.js
  • Garel Couture
    Django Developer
    ARTS AND CRAFTS
    August 2025 - Today (10 months)
    Digital transformation and intelligent automation of the Garel Couture business
    From traditional craftsmanship to growth orchestrated by technology.

    Vision & Innovation:

    I introduced an unprecedented approach in a sector where everything is still done by hand… even prospecting.
    The idea: automate an artisanal business without ever distorting its authenticity.
    Result: a hybrid model, combining precision craftsmanship and algorithmic efficiency, capable of growing on its own.

    Web Development & Conversion:

    • Creation of a showcase website with Django with a performance and conversion-oriented landing page
    • Integration of Calendly for smooth, frictionless booking
    • Deployment of an automated Google review system, sending personalized reminders after each service
    → Zero effort for the client, reviews pour in automatically.

    SEO & Digital Presence:

    • Design of an SEO-optimized CMS blog, generating targeted organic traffic
    • Complete redesign and optimization of Google My Business, connected to the review system for a local snowball effect

    Automation & Orchestration:

    This is where innovation truly came to life:
    • Development of a business orchestration system (Monday / TickTick + custom API)
    • Automations for:
    – Research and prospecting of new clients (via scripts and social workflows)
    – Automatic posting in local Facebook groups to maintain visibility
    – Intelligent task delegation to collaborators based on their workload

    Measurable results:

    • +34 Google reviews in 30 days, generated effortlessly
    • +100 new clients in the first month
    • A business that has become semi-autonomous, capable of running even when no one is connected
    • A scalable structure
    Python Django Project Management
  • LP CONSULTING
    Django Developer
    SOFTWARE PUBLISHING
    April 2025 - Today (1 year and 2 months)
    Full development of a multi-platform cross-posting SaaS.

    Backend & Architecture:
    • Development of a full-stack Django application with real-time management via Django Channels
    • Asynchronous architecture with Redis and Celery for distributed task processing
    • Implementation of Redis for cache management and queues
    • Design and optimization of the backend architecture to support a high volume of requests
    • Integration of Stripe for payment and subscription management

    Infrastructure & DevOps:
    • Deployment and configuration on Railway and VPS (complete infrastructure management)
    • Implementation of CI/CD pipelines to automate tests and deployments
    • Integration of Sentry for error monitoring and performance supervision
    • Configuration and monitoring of production workers
    • Management of scalability and system performance

    Frontend & Real-time:
    • Development of responsive user interfaces with TailwindCSS and HTMX
    • Integration of real-time features (WebSockets) for instant feedback
    • Optimization of user experience and front-end performance

    AI & Data Collection:
    • Integration of generative AI for content automation and optimization

    Quality & Delivery:
    • Implementation of unit tests and a complete testing strategy
    • Management of client deliveries and technical support
    • Monitoring of code quality and development best practices
    Python Artificial Intelligence Redis Web Scraping Django

Recommendations

CG
LP
Christophe DumouchCD
Clara Garel and 2 other people have recommended Kevin

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Education

  • Engineer's Degree | RNCP Level 7 (Master's Degree)
    ISEN
    2025
    Certification technique intensive délivrée par Cisco. Maîtrise du C++ moderne : POO avancée, gestion mémoire optimisée, templates, STL et debugging de systèmes complexes. Valide ma capacité à concevoir des applications performantes et maintenables, résoudre des problèmes techniques critiques et livrer du code de qualité professionnelle. Certification reconnue attestant d'une expertise opérationnelle immédiate pour intégrer des équipes de développement, optimiser le code existant et répondre

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