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David S.DS

David S.

AI Integration & Full-Stack Developer

€300/day
Sønderborg, DK
0-2 years

Average response time: 1 hour

About David

Full-stack developer specialising in AI integration. I bring RAG, semantic search, and LLM features into production web apps built on Next.js, TypeScript, and Supabase.
I've delivered real projects end-to-end, from a paying client's live system to a healthcare build with Sønderborg Hospital.
Studying Software Engineering and Physics in parallel means the numerical side of AI is home territory for me.
Fully remote, across European time zones.
  • Spanish

    Native or bilingual

  • English

    Fluent

  • Catalan

    Native or bilingual

  • Danish

    Basic

Remote only
Primarily works remotely

Experience

  • Upwork
    Freelance Full-stack Developer
    DIGITAL AND IT
    January 2024 - June 2025 (1 year and 5 months)
    Designed and delivered production web applications for real clients, managing the full lifecycle from requirements to deployment and maintenance. Notable project: Strikepool, a table reservation system live and in active use by a paying client.
    Next.js Typescript Supabase React.js
  • Danfoss
    Software Developer. Energy Optimization (SDU × Danfoss)
    ENERGY AND UTILITIES
    January 2025 - June 2025 (5 months)
    Sønderborg, Denmark
    Built HPO Analyzer with Danfoss engineers: a C# desktop tool for industrial heat production optimization. Worked with real operational data and delivered multi-scenario optimization across cost, CO₂ and fuel, with interactive data visualization.
    C# .NET Data visualization Data science
  • Sønderborg Hospital
    Full-Stack Developer. Healthcare (SDU × Sønderborg Hospital)
    HEALTH AND WELLNESS
    January 2026 - June 2026 (5 months)
    Sønderborg, Denmark
    Built DialysisX with Sønderborg Hospital: a gamified cycling system for hemodialysis patients. Real-time pedal data streams to a ward-wide race interface, turning treatment sessions into a shared experience. Full-stack across mobile and backend.
    ASP.NET Core C# MongoDB Websocket

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Education

  • BSc
    University of Southern Denmark (SDU)
    2027
    BSc
  • Degree in Physics
    UNED
    2026
    Degree in Physics

Skill set

Categories