Fifteen years turning hard problems into software: distributed storage, core banking, and applied AI. One of the first engineers at a European neobank; now building something new in fintech.
One idea runs through everything I build: correctness you can prove at every layer, from the byte on disk to the balance on a statement.
Started at eleven in C and assembler. Later, ZFS filesystem drivers on Solaris/Illumos, where every block is checksummed and integrity is not negotiable.
Built a core banking ledger and AML services from zero under BaFin supervision. Double-entry bookkeeping: every cent reconciles, or the system is wrong.
Now applying that same discipline to AI in banking and brokerage: orchestration, retrieval, and agents where the output has to be trusted with real money.
Founding engineering on a new financial product.
Partnering with leaders in wealth, private equity, and financial services to modernise core operations, building frontier AI with deep industry context.
One of the first engineers. Built the in-house ledger and AML from zero under BaFin, then current accounts, interest products, and SEPA & card payment rails.
Recruiter intelligence platform; already matched hundreds of people with a job.
AI writing tool that drafts researched, publish-ready articles from a single idea.
Built and scaled a leading German-language ETF platform, solo, end to end.
LLM-powered book summaries, before it was a category.
Backend for cloud storage in Go and C; maintained ZFS drivers and migrated Telekom Magenta Cloud with minimal downtime.
An opinionated Domain-Driven Design template for Go, with a full guide: a reference architecture other engineers build production systems on.
View repository →A neo-grotesque type family I drew and open-sourced: variable, roman and italic. You're reading it now.
View specimen →I release the patterns I'd want to inherit. Alongside these, a decade of work most people never see the source of: