Jesús Sánchez Rodríguez

I am a Physiotherapist and Computer Engineer (AI track) building intelligent software for health and fitness. My work sits where clinical knowledge meets engineering: understanding human movement in the clinic, then measuring it with sensors and models.

• Co-founder & Full-stack Software Engineer at TwinFIT (since March 2025): I design and build the whole product, from architecture to production:
  • Android: native Kotlin / Jetpack Compose app with a Wear OS companion.
  • Web: marketing site and internal tools (user support, catalogue management).
  • Backend: PostgreSQL, GraphQL API, authentication and server functions.
  • ML / MLOps: IMU sensor pipelines (signal processing, feature engineering), exercise recognition and rep counting, velocity-based training (1RM estimation) and training-load monitoring (ACWR) for injury prevention.
• Physiotherapist (since 2012): independent clinical practice. This hands-on clinical lens shapes software that is technically robust and aligned with real-world practice.

I am an AI-powered developer: I rely on AI agents to move fast without cutting corners.

• Architecture first: data model, module boundaries and business rules that live in the schema, not in the UI.
• Contract-driven agents: agents work from written contracts (architecture, data, security). The path is laid out: they know what they may touch and what they must never touch.
• Verifiable goals: every task has a goal, a scope and a measurable definition of done. The agent executes; I review and sign off.

Health tools born from clinical practice (prescription generator, AI-assisted patient history, shoulder ROM by computer vision) and Android apps and games published on Google Play under jsr90.

• Mobile: Kotlin, Jetpack Compose, Wear OS, Flutter.
• AI / Data: Python, scikit-learn, TensorFlow/PyTorch, computer vision, LLMs, ONNX, signal processing.
• Backend: PostgreSQL, GraphQL, Supabase, Nhost, FastAPI, Flask, MongoDB.
• Practices: software architecture, AI agents, MLOps, CI/CD.

More at jsr90.com.

I prioritize organization and structure in my daily tasks, which is reflected in my coding practices. I am committed to writing clean, maintainable, and well-documented code by following established standards and best practices. I emphasize modular design to enhance scalability and reusability, while ensuring my solutions remain simple, clear, and easy to understand. My goal is to deliver efficient code that balances functionality with readability.