# Alt F4

> Alt F4 is a software agency based in Munich, Germany, founded by Oliver Eilhard. We build custom software that outlasts the hype — backends, frontends, and full platforms — with a focus on Go, React, PostgreSQL, and cloud infrastructure.

## About

Alt F4 is a small, senior-level software consultancy. We work directly with companies on custom development, architecture, and long-term technical partnerships. Our clients include DAX-listed enterprises, health insurance providers, and SaaS companies in procurement, edtech, and open source.

Oliver Eilhard is a software engineer with 25+ years of experience. He is the author of the widely-used Go Elasticsearch client "olivere/elastic" (7,500+ GitHub stars). He has deep expertise in Go, distributed systems, search infrastructure, and building production-grade platforms.

## Contact

- Website: https://alt-f4.de
- Email: hello@alt-f4.de

## Technology expertise

Go, React, TypeScript, PostgreSQL, Elasticsearch/OpenSearch, Redis, AWS, Hetzner, Docker, TanStack, Tailwind CSS, C#/.NET (legacy)

## Docs

- [Full context for LLMs](https://alt-f4.de/llms-full.txt): Expanded information about Alt F4, projects, and expertise
- [Projects (EN)](https://alt-f4.de/en/projects): Selected projects and case studies
- [Blog (EN)](https://alt-f4.de/en/blog): Engineering blog and notes
- [Projects (DE)](https://alt-f4.de/de/projects): Projekte und Fallstudien
- [Blog (DE)](https://alt-f4.de/de/blog): Engineering-Blog und Notizen