Alt F4
Software that outlasts the hype.
Open source since 2012 — 7,500+ stars on the Go Elasticsearch client. Procurement platforms in production at DAX-listed companies. One person you actually talk to.
Selected work
- Quellwerk — drinking water risk managementRisk management copilot for small water utilities: lab report import, limit early warning, and hazard analysis per DVGW W 1001.
- IntakeAgentic procurement: rethinking procurement for the AI era.
- Johnson Controls Procurement PlatformAI-supported procurement platform with catalog and punchout shopping, rolled out across Europe on AWS.
- Elastic - Elasticsearch Client for GoThe go-to unofficial Elasticsearch client for Go with 7,500+ GitHub stars, used in production since 2012.
What we stand for
Long-term thinking
We build software meant to run for years, not sprints.
Deep expertise
Decades of experience across procurement, logistics, and enterprise systems.
Honest craft
No shortcuts, no bloat. Clean architecture, maintainable code.
Partnership
We work with you, not for you. Your success is ours.
Modern tooling
We adopt what works. AI-assisted engineering lets us move faster and think deeper — not replacing expertise, but amplifying it.
Blog & Notes
PT Sans
I was actually surprised to hear that PT Sans started as a Russian state project. It was commissioned in 2009 for the 300th anniversary of Peter the Great's script reform, with the goal of giving every language of the Russian Federation a free typeface.Can AI Simulate 8 Billion People?
Simile AI tries to find out.Claude sessions talking to each other …
… and coordinating is a strange experience.AI Watermarking
Claude and others are starting to mark or detect AI content to comply with EU transparency regulation in the AI Act (PDF).
The two approaches are opposites: Anthropic marks at the source, embedding an imperceptible watermark in generated text and attaching signed C2PA provenance metadata to files, while Substack (together with Pangram) works from the receiving end, letting readers run a statistical detector over published posts. Here's a paper describing watermarking for LLMs in detail.
The practice of using Claude to generate content even earned its own term: Claudefishing.
Jacobian Conjectures
Terence Tao, Fields Medal–winning mathematician, discusses the Jacobian conjecture with ChatGPT.Linus on AI
AI is a tool, just like other tools we use. And it's clearly a useful one. It may not have been that "clearly" even just a year ago, but it's no longer in question today. There are other questions around AI (like what the economy of it will actually look like in the end), but "is it useful" is no longer one of those questions. Anybody who doubts that clearly hasn't actually used it.
Linus on the Kernel mailing list.Most People/Companies aren’t Tool Builders
AI makes it easy for anyone to build tools to automate their work... except most people and most companies aren't tool-builders, don't think like that, and can't and won't do that. This is why software companies and consultants exist - AI changes the thresholds but not the problem.
Another PodcastDario in love
There is this user on X who does videos with her and Dario Amodei. Quite disturbing. But technically: Really good.Reinvent the wheel
I've always been skeptical of those people who tell you to not reinvent the wheel. Seems like the people at Raycast are as well.
Let's talk.
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hello@alt-f4.de