Senior developer and architect. 15+ years hands-on. Based in London.
I run Turczynski Interactive Ltd — fractional CTO, Drupal / PHP, .NET / C#, and AI mobile MVPs and production RAG systems.
Architecture, code, and everything between.
- Fractional CTO / Interim Technical Director — architecture, hiring, roadmaps. Code alongside the team.
- AI mobile MVPs and RAG — embeddings, vector stores, evals, cost controls.
- Drupal 8–11 consultancy — D7 → D10 migrations, performance, security audits.
- .NET / C# — enterprise backends, MSSQL, integrations, DevOps.
- turczynski.com — services and contact.
- Sedno — Your symptoms have a story. AI-powered symptom-journal app.
- drupal.org/u/Turek — Drupal contributions.

