RedFin AI Blog https://www.redfinai.co.uk/blog.html AI engineering, LLM cost optimisation, mobile development, MVP delivery and AI regulation — written by the RedFin AI engineering team. en-gb Wed, 15 Jul 2026 09:00:00 +0000 RedFin AI RAG Isn't a Product. Evaluation Is. https://www.redfinai.co.uk/blog/rag-evaluation-not-a-product.html https://www.redfinai.co.uk/blog/rag-evaluation-not-a-product.html Wed, 15 Jul 2026 09:00:00 +0000 AI engineering Nine in ten Retrieval-Augmented Generation projects fail at evaluation, not retrieval. A practical framework for measuring RAG quality on your own data. Anatomy of a 4-Week MVP https://www.redfinai.co.uk/blog/anatomy-of-a-4-week-mvp.html https://www.redfinai.co.uk/blog/anatomy-of-a-4-week-mvp.html Wed, 15 Jul 2026 09:00:00 +0000 Delivery Sprint by sprint, hour by hour: how RedFin AI compresses three months of typical agency work into 28 calendar days. How to Cut Your LLM Costs by 70% https://www.redfinai.co.uk/blog/cut-llm-costs-70-percent.html https://www.redfinai.co.uk/blog/cut-llm-costs-70-percent.html Wed, 15 Jul 2026 09:00:00 +0000 Cost engineering Prompt caching, small-model routing, semantic caching, prompt compression and batching — the five production techniques we use to cut LLM bills. Native vs React Native in 2026 https://www.redfinai.co.uk/blog/native-vs-react-native-2026.html https://www.redfinai.co.uk/blog/native-vs-react-native-2026.html Wed, 15 Jul 2026 09:00:00 +0000 Mobile The 2018 answer doesn't apply anymore. Where the honest trade-offs actually are in 2026 for native vs cross-platform mobile development. The EU AI Act, Practically https://www.redfinai.co.uk/blog/eu-ai-act-practical-guide.html https://www.redfinai.co.uk/blog/eu-ai-act-practical-guide.html Wed, 15 Jul 2026 09:00:00 +0000 AI regulation A practical guide to the EU AI Act for engineering and product teams. What applies to you, how to categorise your system, and paperwork that shortens sales cycles. Why "Prompt Engineering" Isn't Engineering — Yet https://www.redfinai.co.uk/blog/prompt-engineering-isnt-engineering.html https://www.redfinai.co.uk/blog/prompt-engineering-isnt-engineering.html Wed, 15 Jul 2026 09:00:00 +0000 AI engineering Most "prompt engineering" today involves no measurement, no versioning and no repeatability. Here's what the upgrade to real LLM engineering actually looks like.