Ski Jump Draft is an online game for ski jumping fans. This repository contains the server-side code.
The project is currently closed.
It was hosted in October 2025 (beta version) on Fly.io, with the frontend on Vercel. Around 10 players took part in tests.
- Backend: ASP.NET (C#) with elements of F#
- Architecture: strong focus on Dependency Inversion Principle (DIP) + Domain Driven Design (DDD)
- CQRS approach (partially applied)
- Real-time communication using SignalR
Project is split into a few parts:
-
Domain Layer (F#) — contains the core logic, fully independent from infrastructure.
It defines rules like draft order or which jumpers advance to the next round. -
Application Layer (C#) — orchestration layer.
Handles workflows like scheduling phases or moving the draft forward after timeouts. -
Infrastructure Layer (C#) — implementations of contracts from Domain and Application.
Includes persistence, schedulers, messaging, etc. -
Web Layer (C#, ASP.NET)** — API layer with Dependency Injection and entry point (Program.cs).
This is the most framework-dependent part. -
Ski Jumping Simulator Layer — custom jump simulation engine, based on probability and designed specifically for this game.
Planned to be extracted into a separate web service.
Ski Jump Draft is based on:
- SOLID principles (especially Dependency Inversion Principle)
- Uncle Bob's Clean Architecture rules (e.g. use cases)
- Selected Domain Driven Design concepts:
- entities
- value objects
- bounded contexts
-
Game — main core of the system
Handles game phases, draft logic, and ranking rules -
Competition — ski jumping competition logic
Currently coupled with Game -
Matchmaking — gathers players before the game starts
-
Simulation — defines interfaces for jump simulation, judges, and weather
-
GameWorld — global data (jumpers, hills), planned to include records and events
- Copy
.env.example→.env - Fill in environment variables
