ARCHITECTURE, CODE, AND EVERYTHING BETWEEN

About Tomasz.

I'm a senior developer and architect with 15+ years in Drupal, PHP, and .NET. I've led in-house teams at Cancer Research UK, the Francis Crick Institute, and BBC Studios (including BBC Good Food), and I run Turczynski Interactive Ltd. out of London.

I work best when I'm close to the code and the people shipping it.

Proof of Impact

  • Cancer Research UK
  • Francis Crick Institute
  • BBC Studios

Core Specialisms

  • Enterprise Drupal
  • .NET Architectures
  • AI Integration
SENIOR, HANDS-ON · UK + EU · BASED IN LONDON · POLISH · ENGLISH · GERMAN (BASIC)
01 · PRIMARY SERVICE

CTO-as-a-service.

Fractional tech leadership for teams that need a pair of hands that can lead the work and do the work.

Interim Technical Director, technical advisory, architecture reviews, hiring panels, platform roadmaps. I architect the stack, run the servers, and write the code alongside the team. I show work weekly, not quarterly — and no slide decks without code behind them.

  • Architecture reviews and roadmaps.
  • Interim Technical Director / Head of Engineering cover.
  • Team augmentation: hiring panels, onboarding, code review.
Past in-house leadership: Cancer Research UK · Francis Crick Institute · BBC Studios · Foundry Visionmongers.
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02 · AI — MOBILE AND RAG

AI — mobile and RAG.

Rapid AI-assisted mobile MVPs and production-grade retrieval-augmented generation.

Ingestion, chunking, embeddings, vector stores, and the evaluation harness that tells you when it's actually working — not just vibing. When the thing ships, it needs to stay accurate and cheap to run. I build the pipelines and the guardrails that make that true.

  • Mobile MVPs. AI-assisted builds, idea to store listing in weeks.
  • Production RAG. Ingestion, embeddings, vector stores, retrieval quality, cost controls.
  • Evaluation harnesses. So regressions are caught before users are.
Sedno — Your symptoms have a story.
AI-powered symptom-journal app. Approved by the Apple App Store and Google Play; release imminent.
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03 · DRUPAL / PHP

Drupal / PHP.

Senior Drupal consultancy for teams running Drupal 8, 9, 10, or 11.

Architecture reviews, multi-site rebuilds, Drupal 7 → 10 migrations with zero URL loss, performance work, and long-term support — with a pair of hands that also writes the code. 15+ years in technology; Drupal 8 through 11 and PHP as core craft.

  • Architecture reviews and migration plans (D7 → D10, D9 → D11).
  • Performance work: profiling, caching layers, render pipeline.
  • Long-term support and maintenance retainers.
drupal.org/u/Turek · Enterprise Drupal for Cancer Research UK, Francis Crick Institute, BBC Good Food, and others.
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04 · .NET / C#

.NET / C#.

Pragmatic C# and .NET for enterprise backends, integrations, and MSSQL.

Service layers, API integrations, PowerShell automation, and the boring, reliable DevOps that keeps it running. Jenkins, Ansible, Docker — whatever the estate actually runs, not whatever's fashionable.

  • Enterprise backends and API integrations.
  • MSSQL schema, query performance, and reporting.
  • DevOps: Jenkins / Ansible / Docker, PowerShell automation.
Senior .NET / C# work as part of a 15+ year technology career across in-house teams and consultancy.
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ASIDE · NON-IT SERVICE

Drone filming.

Licensed FPV drone operator. Cinematic aerial and FPV work.

Tourism, events, real estate, and motorsport. Cinematic FPV where it earns its place, conventional aerial where it doesn't. Licensed UAV operator, based in the UK, available across the UK and EU.

Notable client: Urząd Marszałkowski Województwa Zachodniopomorskiego ("Pomorze Zachodnie" — West Pomerania regional government, Poland).
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Want to talk?

The fastest way in is the contact page — one short paragraph about the problem and I'll reply within one working day. No pitch deck, no discovery call gauntlet.

Prefer to size me up first? My code, my network, and 15+ years of Drupal contributions are all in the open.

Go to contact page
Turczynski Interactive Ltd · 124 City Road, London EC1V 2NX · UK + EU.