Hi, I'm Jan Trejbal

Based in Toulouse, France. For the full story, see my CV: jan.trejbal.land.

What I do

I'm a senior backend engineer at Aviationexam, where I own:

• External APIs and authentication
• Deployment & maintenance of our microservice cluster (Docker, RabbitMQ, Redis, Jaeger)
• CI architecture

Tech stack

Core: .NET, ASP.NET, Docker, RabbitMQ, MariaDB, Redis, NGINX, Caddy, CI/CD

Secondary / previous experience: PostgreSQL, PHP, Nette, TypeScript, Python, Golang, Azure, Bun, Rust, PCB design, embedded solutions

Featured projects

Source generators

• json-converter-source-generator — Source-generated polymorphic JSON converters for .NET
• git-reader-source-generator — Compile-time Git metadata for .NET

APIs & integrations

• Aviationexam.PayPalSdk — .NET SDK for PayPal Checkout REST APIs
• apple-app-store-connect-api — .NET client for the App Store Connect API
• FreshdeskApiDotnet — Lightweight .NET wrapper around the Freshdesk REST API (maintainer)
• Aviationexam.MoneyErp — MoneyERP integration for .NET
• daktela-http-client — .NET client for the Daktela contact-center API
• reporting-api — Reporting API

Tooling & infrastructure

• Aviationexam.DependencyUpdater — Dependency update automation for our repositories
• docker-compose-builder — Generate Docker Compose files in C# using the builder pattern
• deckschrubber — Cleans up old images from a Docker Registry

Off the keyboard

• Renovating a house in Toulouse
• Hiking, swimming, kiting, yachting, rowing, snowboarding
• Argentine tango — co-organizer of a monthly milonga and an annual tango marathon
• Dog dad to an Akita

Contact

• Website: jan.trejbal.land
• Email: jan@trejbal.land
• Twitter / X: @trejjam