Caswell Software Advisory Ltd

About

I’m a UK-based independent software advisor with over 30 years’ experience across embedded systems, security-focused software, distributed systems, and large cross-platform applications.

Over that time I’ve worked hands-on, led teams, shaped architectures, and helped organisations navigate technically complex projects in environments where reliability, security, and long-term maintainability genuinely matter.

Background

My background includes:

How I Think About Software Engineering

Many difficult software problems are not caused by a lack of effort or intelligence.

They emerge when systems gradually become difficult to reason about:

In many cases the challenge is not writing the code.

It is restoring enough structure and clarity that good decisions become possible again. I’m not an advocate of heavy process and believe in a proportionate approach to software development. Perform what’s necessary and sensible to build a product in a sensible timeframe that’s of benefit both the business and customers.

That is the perspective I now bring to advisory work.

Selected Experience

Security-critical and embedded systems

Designed and delivered systems involving PKI, secure boot, TPM integration, encrypted communications, embedded Linux, STM32 platforms, and hardware-adjacent software in regulated and audited environments.

Architecture and platform evolution

Led the transition of products from monolithic desktop applications towards service-oriented and API-based architectures, improving maintainability, security, and operational flexibility.

Modernisation of engineering practices

Introduced modern C++, CI/CD pipelines, automated quality tooling, static analysis, and cross-platform build systems into long-lived engineering environments.

Technical leadership

Led and mentored engineering teams while remaining hands-on in architecture, implementation, system design, and technical decision-making.

Complex systems integration

Worked extensively on integration-heavy systems involving distributed components, protocol implementations, embedded devices, cloud integration, and mixed hardware/software environments.

Selected experience includes work within organisations such as: Hitachi, Viasat, BAE Systems, Tandberg, Ericcson, and Avon Protection.