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
Effective Interviewing (Part 2): How to Bring 'Legacy' Questions to 2026
Stop using memorized syntax quizzes to evaluate candidates. Here is how to update classic technical concepts like SQL injection to test modern system hygiene, data flow, and adaptiveness.
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.