Software Development · UK
Software development services, built to scale your business not slow it down.
Custom enterprise applications, mobile apps, legacy modernisation and UX, engineered in London to ISO 27001 standards, shipped in sprints, and owned outright by you from day one.
- 1M+ active users on apps we've shipped to production
- UK-based senior engineers · no offshoring · full IP transfer
- Two-week sprints · working build at the end of every one
- Security baked in · ISO 27001 from architecture to deploy
ISO 27001 · MICROSOFT SOLUTIONS PARTNER · AWS ADVANCED TIER · ESTABLISHED UK MSP
100+ apps
Developed for decades
1M+ users
Active on our applications
50+ migrated
Applications modernised
100+ supported
Legacy apps under AMS
THE REALITY
When your software is the bottleneck.
We've heard these three stories from every CTO who ends up partnering with us. Each one is the moment a mid-market business realises it can't out-grow its own technology, and it's time to build.
Legacy code blocks every release
✕
The platform that got you to £10M is now the reason you can't reach £50M. Every release breaks something. Every integration takes a quarter.
✓
Modernise non-destructively. Costed roadmap before any rewrite.
Off-the-shelf bends workflows
✕
You bent your workflow to a SaaS that wasn't built for you. Now it's a tax on every customer interaction, every sales motion, and your competitor isn't paying it.
✓
Bespoke fit. You own the IP, the roadmap, the data.
Senior dev hires take a quarter
✕
The roadmap is six months out. London senior engineering hires take five. By the time your team is at strength, the window has closed and the competitor has shipped.
✓
Senior squad live in two weeks. Augment or own end-to-end.
What we build
Four Software Development Services. One UK delivery team.
Mobile, web, legacy, UX, engineered in London by senior in-house specialists. Pick one practice or the full stack; either way, you get the same delivery director and the same XLA from day one.
iOS · ANDROID · RN
Mobile App Development
Native iOS & Android, React Native and Flutter, designed in-house, shipped to the App Store and Play Store. Apps we've built run in the pocket of over a million users.
ISTQB CERTIFIED
Software Testing & QA
Manual, automated, performance, security and accessibility testing. ISTQB-certified QA engineers writing the suites your CI pipeline relies on, built once, run forever.
50+ APPS MIGRATED
Application Migration & Modernisation
Lift-and-shift, replatform, refactor or rewrite. 50+ legacy apps moved to Azure and AWS, non-destructively, with zero data loss and a costed roadmap before any code is touched.
ACCESSIBILITY-FIRST
User Experience Design
Research, IA, prototyping and accessible design systems. UX-first development means we earn user adoption, not just build the thing the stakeholders asked for in the kickoff.
How we work
Three phases from idea to scale.
Most agencies measure success by the contract signed. We measure ours by what's in production six months later, and how many of your users actually use it. So we structure delivery around that.
01
Weeks 1 – 3
Discover
Workshops with your users, a technical audit of what's already there, and a costed roadmap before any code is written. You get the SoW, the architecture diagram and the team you'll work with, by name, on day three.
- User research & jobs-to-be-done
- Costed roadmap & SoW
- Named delivery team
02
Sprints of 2 weeks
Build
Two-week sprints, working build at the end of every one. UX-led, test-driven, ISO 27001-secure from architecture to deploy. AI-augmented engineering accelerates routine code, humans own architecture, integration and judgement.
- Working software every 2 weeks
- CI/CD · automated test suite
- Security review every release
03
Day 1 of production onwards
Scale
Post-launch defect support period as standard. Application Managed Services take over from there, same team, agreed monthly fee, continuous releases. We grow the product as your business grows, with monthly outcome reviews tied to your KPIs.
- Post-launch defect support
- Application Managed Services
- Quarterly outcome review
Why Transputec
Why UK CTOs pick us over a generic agency.
Most software houses are five engineers and a Trello board. We've been building production software for the UK mid-market for decades, and security, lifecycle ownership and engineering rigour have always been the table stakes, not the upsell.
01 · Security baked in
ISO 27001 from architecture to deploy.
Every line of code is written, tested and shipped under our certified controls. Threat modelling at sprint zero, SAST/DAST in CI, pen-test sign-off before launch. Your auditor will thank you on day one.
02 · Full lifecycle ownership
Design, build, ship, support, one team.
UX, engineering, QA, DevOps and AMS under one delivery director. No agency handover gap, no "phase 2 is a separate contract". The team that builds it is the team that supports it five years later.
03 · UK-based · IP yours
London team. Full IP transfer. Always.
Senior engineers under our roof, on UK PAYE, working in your time zone. No offshore L1. Source code, infrastructure-as-code, design files and CI pipelines transfer to you on day one, never tied to us.
04 · AI-augmented engineering
Faster delivery without the AI slop.
We use AI to accelerate routine code, generate test fixtures and document as we go, judged and reviewed by senior humans. The output isn't model-generated boilerplate, it's faster real engineering.
Technology stack
The tools we reach for first.
We're not religious about stacks, we pick the right tool for the workload. But these are the technologies our senior engineers reach for first, and the platforms we have decades of certified production experience on.
Frontend
Backend & APIs
Mobile
Cloud & DevOps
Data & AI
Case study · bespoke mobile app development
T&S Enterprises: a bespoke mobile ordering app that cut platform fees and grew direct sales.
From third-party marketplace dependence to a direct-to-customer ordering app, on both stores.
T&S Enterprises, a London-based fish and seafood supplier with 25+ years of trading heritage, was leaking margin to third-party ordering platforms and had no direct channel to their customers. Transputec built them a bespoke mobile ordering app on both iOS and Android, with promotional capability and loyalty engagement built in, integrated to their existing portal and back-office. The app cut platform fees and gave them a direct customer relationship.
"The mobile app development followed seamlessly, addressing our evolving needs. As we move to new premises, both the portal and app will be central to our operations, offering customers an exceptional ordering experience."
Carlos Da Comceicao · General Manager, T&S Enterprises
Native apps shipped to both stores
Customer ordering, no marketplace cut
T&S Enterprises hospitality heritage
Full ownership of code and roadmap
Insights & resources
Insights & Market Intelligence
Frequently asked
Answers to what UK CTOs ask us most.
How much does custom software development cost in the UK?
UK custom software development is typically priced on a time-and-materials or fixed-scope basis. A focused MVP for mid-market organisations lands between £45,000 and £120,000 for 8–14 weeks of build, depending on complexity. A full enterprise application, multi-tenant, integrated, secure-by-design, typically runs £180,000 to £650,000 over 4–9 months. We publish indicative scope and pricing in the Statement of Work before contract signature, with no per-change surprises. For UK-public-sector software delivery context, see the UK Government Service Manual.
How long does it take to build a bespoke application?
A typical bespoke web application takes 12–20 weeks from kickoff to production launch. Mobile apps (iOS + Android) usually run 14–22 weeks. Larger enterprise platforms with complex integrations land between 6 and 9 months. We deliver in two-week sprints with a working build at the end of every sprint, so you see progress continuously, never a “big reveal” at the end. See a real bespoke build in our mobile ordering app case study for T&S Enterprises.
What is the difference between custom and off-the-shelf software?
Off-the-shelf software is built once and sold to many, you adapt your process to its assumptions. Custom (bespoke) software is built to fit your specific workflow, data model and integrations, you own the IP, the roadmap, and the data. Bespoke wins when your process is a competitive advantage, off-the-shelf wins when it isn't. Most mid-market organisations end up using a mix, and we design for that reality.
Can you modernise our legacy applications?
Yes. We've migrated 50+ legacy applications, from Visual Basic, Classic ASP, Delphi, PowerBuilder and on-prem Java estates, to modern stacks on Azure and AWS. We start with a non-destructive readiness assessment: what to rewrite, what to wrap with APIs, what to retire. You get a costed roadmap before any code is touched, and we never force a big-bang rewrite when a phased approach is safer. For the wider DevOps + cloud delivery context, read our blog on how DevOps and cloud work together.
Where is your development team based?
Our software engineering team is based in our London headquarters. Senior architects, full-stack engineers, mobile specialists and UX designers all sit in-house under one accountable delivery director. We don't outsource development, every line of code is written under our ISO 27001 controls, with full IP assignment to you on day one.
Do you provide post-launch support?
Yes. Every Transputec build includes a post-launch defect support period as standard. We also offer Application Managed Services, ongoing development, monitoring, patching and feature releases under a agreed monthly fee. Most clients move straight from project mode to AMS, with the same team continuing to operate and evolve the application.
What is custom software development?
Custom (also called bespoke) software development is the practice of designing and building an application specifically for one organisation’s workflow, data model and integrations, instead of adapting your processes to an off-the-shelf product. You own the source code, the roadmap and the data; the application fits your business rather than the other way around. Custom software wins when your workflow is a competitive differentiator (e.g. a unique pricing engine, a regulated case-management process, or a customer-facing experience that can’t be off-the-shelf). It loses when a configurable SaaS already does 90% of the job. See our worked example in the T&S Enterprises bespoke mobile app case study, or the mobile app development service.
Strategic consultation
Get a strategic consultation.
A focused conversation with a Transputec software architect. We look at your goal, your stack and your timeline, and share an indicative costed roadmap with team-size guidance, even if we don't end up working together.
- Costed roadmap with phased delivery options
- Architecture sketch · build-vs-buy guidance
- Indicative team size and timeline for your scope
- Prompt reply · ISO 27001 secure handling