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Thijsn04/README.md
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πŸ‘‹ About

I'm a final-year Medical Informatics student at the University of Amsterdam and the founder of Lythos β€” a small software studio where I build AI-driven products for the Dutch healthcare and consumer market.

Most of my work sits where clinical domain knowledge meets software engineering: EHR systems, HL7 FHIR data, LLM pipelines that turn messy medical language into something people can actually use, and the self-hosted infrastructure to run it all in production.

  • πŸ₯ Healthcare tech β€” EHR systems, synthetic FHIR data, clinical text simplification, grounded in real hospital workflows
  • πŸ€– Applied AI β€” LLM pipelines, structured generation, validation-first design (Python Β· Gemini Β· LiteLLM)
  • βš™οΈ Full stack & infra β€” FastAPI Β· PostgreSQL Β· React/Next.js Β· Docker, on self-hosted ARM64 cloud
  • 🀝 Open to β€” freelance work via Lythos, healthcare-tech collaborations, and interesting engineering roles

πŸš€ Featured Projects

πŸ₯ Zantrix

Open-source Electronic Health Record system

An inspectable, modular EHR built to open up a space that's normally locked behind proprietary vendors β€” informed by first-hand experience with hospital information systems.

Java Β· EHR Β· GDPR/AVG-aware Β· Open source

✈️ LifeTravel · Lythos

AI travel-advisory platform (client product)

A production travel-advisory system with itinerary management and automated PDF generation, running on self-hosted infrastructure.

TypeScript Β· FastAPI Β· PostgreSQL Β· Docker

πŸ’¬ MediClear-AI

Clinical text β†’ plain language

Simplifies complex medical text, PDFs and images to B1 reading level with multi-language support and text-to-speech, powered by Gemini 2.5.

Python Β· Gemini 2.5 Β· Multimodal Β· Health literacy

🧬 SynthFHIR

Synthetic FHIR patient-data generator

Generates fully relational, realistic clinical datasets across 15+ FHIR R4/R5 resource types β€” no APIs, no real patient data. Safe test data for healthcare devs.

Python Β· HL7 FHIR Β· FastAPI Β· Synthetic data

More on GitHub: Momentum (self-improvement PWA) Β· AppleHealthDashboard (local health analytics) Β· QuestLog (AI goal tracking)


πŸ› οΈ Tech Stack

Languages

Frameworks & Frontend

Data, Cloud & Tooling


πŸ’» Experience

πŸš€ Founder & Software Engineer β€” Lythos Β· 2026 β€” Present
Run a software studio delivering freelance client work and my own AI-driven products. I own the full lifecycle: architecture, agent-assisted development, deployment, and iteration β€” on self-hosted production infrastructure (Oracle Cloud ARM64, PostgreSQL, Authentik SSO, Traefik, Cloudflare).

πŸ₯ ICM Planner & Polyclinic Assistant β€” Spaarne Gasthuis Β· 2026 β€” Present
Capacity and appointment planning for the Rheumatology and Gastroenterology departments. Analyzed and improved internal staffing-measurement tooling in Excel/VBA, catching data-loss and date-logic defects β€” bridging clinical operations with engineering.


πŸ† Selected Highlights

  • πŸ₯‡ Delivered a validated AI patient-profile generation system for a medical-education setting, with strong validation scores
  • πŸ‘‘ Led a four-person engineering team as Product Owner, from project plan through final product presentation
  • πŸ” Authored a GDPR/AVG-based asset classification and security analysis for a hospital information system
  • πŸ—οΈ Designed and operate a fully self-hosted production platform on ARM64 cloud infrastructure

πŸ“Š GitHub





Building at the intersection of healthcare and code β€” one honest project at a time.

Popular repositories Loading

  1. AppleHealthDashboard AppleHealthDashboard Public

    Privacy-first, 100% local Streamlit dashboard for your full Apple Health export β€” sleep, heart, workouts, rings, body and cross-metric insights. DuckDB-backed.

    Python 1

  2. MediClear-AI MediClear-AI Public

    Open-source FastAPI app that simplifies clinical text, PDFs and images to B1-level plain language, with multi-language support and text-to-speech. Bring your own AI model.

    Python 1

  3. QuestLog QuestLog Public

    Gamified, AI-powered vision board β€” turns life goals into RPG-style quests with XP, levels and AI task breakdown. FastAPI + Gemini.

    Python 1

  4. SynthFHIR SynthFHIR Public

    Free, locally-hosted synthetic FHIR patient-data generator β€” relational R4/R5 datasets across 15+ resource types with US Core support. No APIs, no real patient data.

    Python 1

  5. Momentum Momentum Public

    Hyper-personalized all-in-one self-improvement PWA β€” habits, training, nutrition, tasks and mental state in one place. Next.js 15 + Firebase.

    TypeScript 1

  6. Zantrix Zantrix Public

    Open-source, FHIR-native Electronic Health Record (EHR/EPD) β€” Spring Boot 3 backend, React 19 PWA frontend, Keycloak-secured. Built for standardization, auditability and modular scale.

    Java 1