Software engineer, Berlin
I build software, and the teams that build it.
14 years as an engineer and engineering manager. I write about backend engineering, AI agents and hiring, and help teams hire well.
Latest writing
All posts
Why I Chose TimescaleDB Over ClickHouse for Analytics (Part 1)
Why witnes.io went with TimescaleDB over ClickHouse: row vs. columnar storage, hypertables, compression, continuous aggregates, and the operational sanity of staying on PostgreSQL.
Things I've built
- Billino Invoicing for freelancers and businesses in Europe and the US, with e-invoice PDFs and DATEV exports.
- Witnes Privacy first analytics and frontend performance, so you can see what each visitor experienced without cookies.
- bufferq A sidecar for your API that decides whether each caller is admitted, deferred or rejected.
About
I'm Christos, a software engineer based in Berlin. I've spent 14 years building products and leading engineering teams.