Adaptive training & nutrition platform

ATNP

A self-hosted, closed-loop coaching system: log what you did and how it felt, and the engine recalculates your next loads, weekly volume and calorie targets — explaining every adjustment.

Kotlin
Spring Boot
PostgreSQL
Angular
PWA
Caddy
Docker

The challenge

Training and nutrition plans are usually static spreadsheets; the adjustments that matter happen in a coach’s head and are rarely explained.

What we built

A pure-Kotlin adaptive engine with no framework or database dependencies, wrapped in a Spring Boot API (JWT, Argon2id) and an Angular progressive web app that works offline. Table-driven engine tests, Testcontainers against a real PostgreSQL and Playwright end-to-end runs guard the behaviour.