.NET Backend Developer · Germany

I build reliable backend systems, APIs, and automation tools with C# and .NET.
My focus is on clean architecture, infrastructure automation, and pragmatic solutions for real-world problems — from Docker management platforms to EU regulatory compliance tooling.

Languages & Frameworks
C# · .NET 8–10 · ASP.NET Core · Blazor Server · Avalonia UI · Entity Framework Core

Cloud & Auth
Azure AD · JWT · Microsoft Graph API · ASP.NET Identity · OAuth · PBKDF2-SHA256

Infrastructure & DevOps
Docker · Multi-Stage Builds · GitHub Actions · GitLab CI/CD · Linux (Arch) · Nginx · WireGuard

Data & Caching
MySQL · MariaDB · SQL Server · SQLite · Redis · HybridCache · Stored Procedures · XML/XSD Serialization

Integration
REST API Design · Swagger/OpenAPI · Scalar UI · Prometheus Metrics · SMTP · FTP · Docker Engine API

High-performance REST API providing structured Tibia game data, synced from TibiaWiki.
Replaces slow wiki page parsing with a fast, typed, cache-backed data layer.

• 42+ endpoint categories (Items, Creatures, Hunting Places, NPCs, Spells, Quests, and more)
• Multi-layer caching with HybridCache (L1 In-Memory + L2 Redis) and tag-based invalidation
• Automated background scraping with change detection, error tracking, and admin controls
• Security hardening: rate limiting (token bucket + concurrency), IP banning, brute force protection, PBKDF2-SHA256, security headers
• Prometheus metrics endpoint and Kubernetes-ready health checks (/health/live, /health/ready)

C# ASP.NET Core .NET 10 EF Core MariaDB Redis Docker Coravel Prometheus

Cross-platform desktop application for tracking and optimizing game sessions in Tibia.
Built with Avalonia UI targeting Windows and Linux from a single codebase.

• Real-time session tracking with profit/loss analysis and loot calculations
• MVVM architecture with reactive UI bindings and 6-language localization
• 32 test files covering unit, integration, and concurrency scenarios
• Consumes data from TibiaData API, TibiaWiki, and TibiaPal

C# Avalonia UI .NET 10 EF Core SQLite MVVM Polly xUnit

Self-hosted web application for managing Docker containers, images, volumes, and networks through a browser UI. Built as an internal tool to replace CLI-based Docker management.

• Blazor Server frontend with Radzen components and real-time container status updates
• Direct Docker Engine API integration via Unix sockets (Linux) and TCP (Windows)
• Full auth system with ASP.NET Identity, role-based access control, and 2FA
• Docker Compose project management with YAML parsing and editing
• Private Docker Registry integration
• Multi-stage Dockerfile with embedded Python runtime for scripting support

C# Blazor Server .NET 9 Docker API EF Core SQLite ASP.NET Identity

Production-ready API template implementing clean architecture patterns.
Designed as a reusable foundation for backend services.

• Layered architecture with clear separation of concerns
• Background service integration for async task processing
• Full CI/CD pipeline with GitLab

C# ASP.NET Core .NET 8 Docker GitLab CI

Discord bot service built with modern .NET patterns.
Runs as a fully containerized service with automated deployments.

• Async command handling with dependency injection
• Backed by a dedicated REST API for data and configuration
• Dockerized with CI/CD-driven image builds and registry push

C# .NET 8 Docker REST API GitLab CI

📧 Email — martin.ranft@tibiafun.eu
💼 LinkedIn — linkedin.com/in/martin-ranft-57270121b