Principal engineer and independent consultant in Cluj-Napoca, Romania. Backend systems, cloud infrastructure and production performance since 2011.
Recent work
- A platform built from zero. AWS, Terraform and EKS for a real-money sports product in the US, with CI on GitHub Actions. I led the DevOps team that runs it.
- Latency, traced end to end. Followed slow requests from the phone to the database on a live sports app and lined up the few fixes that matter: query patterns, payload size, caching.
- A hacked publication, recovered. Brought back every deleted article after a CMS exploit, then patched the servers and put them behind Cloudflare.
How I help teams: get more out of AI with agentic coding and review gates · cut latency · harden infrastructure · automate manual work · CI/CD you can trust. Details at sfat.me.
Things I built
- Voyagen: a travel packing app for iOS with real-time sync. React Native, Hono, Postgres.
- Meal Plan: a weekly meal planner with recipes and calories, in English and Romanian.
Before: lead developer on a crypto exchange, open-source developer at Snyk, team lead at iWelcome (identity platform), Java developer at 3Pillar Global.
Writing: sfat.me/blog, on building software, running it in production, and staying private online.