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.
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.
Selected work
- Water Utilities
Quellwerk — drinking water risk management
Risk management copilot for small water utilities: lab report import, limit early warning, and hazard analysis per DVGW W 1001.
DVGW W 1001TrinkwVPFASLab report import - Electronics
Vorlauf — obsolescence management for electronics
PCN inbox that knows your BOM: automatic discontinuation matching, audit-ready case files and deadline tracking for long-lived electronics.
PCN/PDNsmartPCNIEC 62402SAP import - Procurement
Intake
Agentic procurement: rethinking procurement for the AI era.
Agentic ProcurementB2BA2A/M2M Shopping - EdTech
tealside
Learning experience platform for leadership training and professional development with cohort-based learning journeys.
LXPCohort-based learningLeadership development
Blog & Notes
Enjoy the moment
Be the person who leaves the phone in their pocket at a concert.AI talk
You won't find me comparing AI models or GPU performance. I just don't care. When I talk AI, I'm talking about the power dynamic between those in power, and the average person. I choose to focus on the drawbacks of AI while highlighting the potential of humanity. Using machines as a tool is cool, trading in your humanity isn't.
Kelsey Hightowercrypto/passkeys
Proposal to addcrypto/passkeysto the Go standard library.ZeroFS
ZeroFS: A log-structured filesystem for S3.Persistent Agent Memory
Elastic labs post on how to build a persistent agent memory layer.Remember…
Remember when programming was still free?Go MCP server
Gopls comes with a MCP server now.Europe 2031
Europe 2031. A perspective.Lost in creation
Generic methods in Go 1.27
Generic methods are coming to Go in 1.27 (fingers crossed). Yes, eye-roll if you must. I never loved Go for the feature list anyway.
Let's talk.
Prefer email?
hello@alt-f4.de