# RJJ Software Ltd

> Multi-stack technology consulting (.NET, Ruby on Rails, AI adoption) led by former Microsoft MVP Jamie Taylor. Fractional CTO services worldwide.

Jamie Taylor — fractional CTO and technology consultant, Leeds. Companies bring me the technology decisions that are too important to guess at, and too infrequent to justify a full-time hire.

## Latest position (2 October 2026)

[Thinking on Purpose: Critical-Thinking Lessons for Technical Leaders](https://rjj-software.co.uk/blog/continual-professional-development/thinking-on-purpose-critical-thinking-lessons-for-technical-leaders/) — Critical thinking is not raw intelligence; it is a decision-making discipline, and the quality of the calls a technical leader makes is downstream of it. This post reads ten quotes from Thinknetic's 'Critical Thinking In A Nutshell' through the lens of leading software teams: why you examine the assumption before you commit, why being wrong often is the skill and not the failure, why anger and speed are the enemies of a good decision, how to judge an argument on its merits rather than on who is making it, and the difference between empathy and a sympathy that quietly biases your judgement.

## What the work produced

- **75 %** — faster feature delivery, measured against DORA metrics across a globally distributed team ([Ligentia, twelve months](https://rjj-software.co.uk/case-studies/higher-quality-shipped-faster-ai-adoption-at-ligentia/))
- **£25,000** — of hardware the business had been told it needed, and turned out not to ([Small business assessment, one review](https://rjj-software.co.uk/case-studies/how-strategic-technology-assessment-saved-a-small-business-25000/))
- **0 deploys** — to ship a new report type; report definitions live in configuration, not code ([Bossie Hurley, platform build](https://rjj-software.co.uk/case-studies/shipping-reports-without-shipping-software-building-a-data-driven-reporting-platform/))
- **3 months** — from a blank page to a launched platform for analysing scientific data at scale ([Sage Publishing, MVP stage](https://rjj-software.co.uk/case-studies/sage-texti-revolutionizing-scientific-data-analysis/))
- **1 month** — from no coding experience to a production React application, with mentoring ([Journalist, self-funded, one engagement](https://rjj-software.co.uk/case-studies/zero-to-production-teaching-ai-assisted-development/))

Each figure links to the write-up it came from, including how it was measured. Numbers without a client and a source are marketing, not evidence.

## What people call me about

- **Fractional CTO** — Every senior technology decision lands on one person, and that person is running out of hours. ([details](https://rjj-software.co.uk/services/#fractional-cto-services))
- **Technology due diligence** — You're weighing an acquisition, and the code is the part nobody in the room can read. ([details](https://rjj-software.co.uk/services/#technology-due-diligence))
- **Architecture and security reviews** — You're scaling faster than the architecture was built for, and you need to know what breaks first. ([details](https://rjj-software.co.uk/services/#architecture-and-security-reviews))
- **Agentic development and AI adoption** — Your engineers are using AI tools, and nobody agreed on what good looks like. ([details](https://rjj-software.co.uk/services/#agentic-development-ai-adoption))
- **Technology strategy workshops** — Your leadership team keeps having the same argument about direction, and it never quite resolves. ([details](https://rjj-software.co.uk/services/#technology-strategy-workshops))
- **Engineering leadership development** — You have good engineers who've stopped growing, and no one senior enough to pull them up. ([details](https://rjj-software.co.uk/services/#engineering-leadership-development))
- **Software development** — The thing needs building, and standing up a permanent team to build it is the wrong shape. ([details](https://rjj-software.co.uk/services/#software-development))

[Full detail on each engagement](https://rjj-software.co.uk/services/)

## Clients

Ligentia, Sage Publishing, Footasylum, ghd, Servita, Bossie Hurley, Odondo, LogTrade, Packt, ABM Kitchens & Bathrooms.

Billion-pound enterprises and two-person startups, usually at the point where a technology decision has become too expensive to get wrong.

## Pages

- [News](https://rjj-software.co.uk/news)
- [Services](https://rjj-software.co.uk/services)
- [Case Studies](https://rjj-software.co.uk/case-studies)
- [Writing](https://rjj-software.co.uk/blog)
- [About](https://rjj-software.co.uk/author/jamie-taylor)