Custom Software Development
Software,
delivered at pace.
Engineered to last.
We design and build bespoke software for complex, high-stakes work, with AI woven into the product rather than bolted on the side. No templates, no vibe-coding. Just real engineering.
Real Engineering
Our software isn't vibe-coded.
It's built to hold up.
Anyone can prompt their way to a demo. Far fewer can stand it up in production, keep it secure, and still be improving it three years later. That gap is where most software quietly dies. It is also where we do our best work.
- Looks impressive in a demo, falls over in production
- Security and scale bolted on as an afterthought
- A black box nobody on your team can maintain
- Quietly rewritten from scratch within a year
- Senior engineers who have spent decades shipping production systems at pace
- Architecture designed for scale, security and the long haul, not just a demo
- AI used to accelerate delivery, never to paper over weak foundations
- Code you own, understand, and can keep building on for years
Built properly the first time. So it's still standing when it matters.
Where We Specialise
Niches earned in the hardest rooms.
We don't claim to do everything. We build where the stakes are high, the rules are complicated and getting it wrong isn't an option. Proven on real projects, not pitch decks.
Environmental & nature markets
We built a world-first nature markets platform with Arup and EnTrade: a live marketplace and matching engine running on Nobel Prize-winning economics.
EnTrade case study
Defence & mission-critical
Emergency-response software that helps safeguard the UK nuclear submarine fleet. The kind of high-assurance system where lives depend on getting the build right.
Defence case study
Public sector data platforms
A real-time data pipeline for the Met Police and TfL. It saves £12.5M a year, meets GDPR and NCSC compliance, and worked across agencies from day one.
Met Police case studyAI-integrated products
AI woven into the core of the product, not a chatbot bolted on the side. We are ICP-FAI certified, so we ship AI that is responsible and actually holds up in production.
Talk to us about AIWhat We Build
Full-stack delivery,
end to end.
One team across the whole stack, from the first architecture decision to the system your users open every morning.
Full-stack product builds
We take it end to end, from architecture and UX through to a production system your users depend on every day.
Cloud-native architecture
Built for scale and resilience on AWS, Azure and GCP, with the security and observability that mission-critical work demands.
Legacy modernisation
We untangle the systems holding you back and modernise in safe slices, without betting the business on a big-bang rewrite.
Embedded engineering teams
Drop a senior squad into your team to deliver alongside your own people and level them up as they go.
AI, Built In
AI woven into the software.
Not bolted on the side.
Building with AI isn't like building standard software. The uncertainty is higher and the failure modes are harder to predict, so the way you work has to change. We treat AI as a real part of the product: used where it earns its place, engineered to be reliable, and shipped responsibly.
Our team holds ICAgile's ICP-FAI (Foundations of AI) and ICP-AIR (AI Ready) certifications. They give us a proper framework for delivering AI products teams can actually trust and adopt.
Why Radical IT
Senior engineers,
with decades of hard-won experience.
Radical IT has been building software since 2005. We've delivered for the Ministry of Defence, the Met Police, Arup and EnTrade. Places where "move fast and break things" was never an option.
Our founder wrote the book on it, literally: Think, Do, Show: the agile 2.0 secrets to building software people love to use. That same discipline runs through every team we put on your work. Senior by default, hands-on, and accountable for what they ship.
Radical go an extra mile in solving problems. If you work with this team, expect agility, tailored solutions and a team that truly cares about your success.”
Trusted By
Who It's For
Built for leaders betting
their roadmap on software.
It matters most when the build is genuinely complex, the constraints are real (security, compliance, legacy systems, AI) and failure carries a cost the business can feel. We bring the senior firepower to get it right.
How We Engage
Bespoke, not boxed.
Every build is different, so we don't sell a fixed package. We shape the engagement around your risk, your timeline and your team, then price it openly once the scope is clear.
Discovery & architecture
A short, sharp engagement to pressure-test the idea, shape the architecture and cut the risk before you commit serious budget.
Fixed-scope MVP
A live, useful product in 90-day iterations. The same rhythm that took EnTrade from an idea to a working marketplace.
Embedded delivery team
A senior team that works as an extension of yours for as long as you need the firepower, delivering and upskilling at the same time.
Get Started
Got something hard to build?
Let's build it properly.
From the first conversation to a live product, we bring the senior engineering and AI depth to turn your hardest idea into software you can rely on.
Start a project