Jan Fietz
Freelance software developer & consultant. Backend, cloud-native architectures, renewable energy.
Services
From prototype to production-ready product — backend, APIs and cloud architecture from a single source.
Senior reinforcement for ongoing projects — embedded, productive, and focused on backend, APIs and infrastructure.
Clear answers on architecture, process and automation questions — before they get expensive.
Backend solutions for direct marketing, asset monitoring and industrial control systems — from wind or solar plant to market interface.
How I work
AI tools are part of the workshop today. Used where they help — eliminate boilerplate, speed up tests, sharpen code reviews. The result: two to three times faster delivery at the same quality, with tests and clean architecture.
Wherever it makes sense, open components are used. PostgreSQL, Prometheus, Kubernetes, GitLab CI. Not a religion — better inspectability, longer lifespan, fewer license traps.
Architectural decisions are made so that migration stays possible. Container-based workloads, standard protocols, clean separation between business logic and cloud adapters. You should not be chained to a vendor because it was easy for me.
Linux is home, not specialist knowledge. From the shell to container runtimes, from systemd to kernel tuning. That makes the difference when systems are under load or when a grown setup needs to be analysed.
Contact
Tell me about your project — I'll get back to you.