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UK Software Engineering

Bespoke software,
engineered to outperform.

We design and build websites, web applications and mobile apps for ambitious startups and established businesses — in the UK and around the world.

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50+
Products shipped
10
Years of experience
99.9%
Uptime delivered
£5m business insurance UK company · Registered in England & Wales
★
4.9
App Store rating
Performance
+212%inbound leads
All systems operational
Trusted by
Northwind Vertexa Loop Health Meridian Cobalt Northwind Vertexa Loop Health Meridian Cobalt
What we do

Full-stack engineering, end‑to‑end.

From first line of code to launch and beyond — a single team that owns strategy, design and delivery.

01

Web development

Fast, accessible, SEO-ready marketing sites and platforms that convert and rank.

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02

Web applications

Complex, data-driven products — dashboards, portals and SaaS built to scale.

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03

Mobile apps

Native-quality iOS and Android apps from a single, well-architected codebase.

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04

Product & UX

Research, prototyping and interface design that turns ideas into usable products.

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Why DELLIUX

Senior engineers. No hand‑offs. Real ownership.

You work directly with the people writing your code. We think in outcomes, not tickets — and we stay accountable for what we ship.

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Direct access to senior engineers
No account managers relaying messages. You talk to the people building your product.
Built to scale from day one
Clean architecture and tested code, so growth never means a costly rebuild.
SEO & performance by default
Core Web Vitals, semantic markup and speed baked in — not bolted on later.
Transparent, fixed-scope delivery
Clear milestones and honest timelines. You always know where things stand.
How we work

A clear path from idea to launch.

01

Discover

We dig into your goals, users and constraints to define what success looks like.

02

Design

Prototypes and interface design you can react to before a line of code is written.

03

Build

Iterative delivery in short cycles, with working software you can see every week.

04

Launch & support

We ship, monitor and keep improving — a long-term partner, not a one-off vendor.

Selected work

Products people rely on.

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Loop Health — Web application built by DELLIUX Web application

Loop Health

A patient portal handling 40k monthly appointments.
Vertexa — Mobile app built by DELLIUX Mobile app

Vertexa

A fintech app rated 4.8 across the App Store.
Northwind — Website built by DELLIUX Website

Northwind

A B2B site that tripled qualified inbound leads.
What clients say

Teams keep coming back.

“
DELLIUX delivered our platform ahead of schedule and it hasn’t skipped a beat since. Genuinely the most reliable team we’ve worked with.
PM
Dr. Priya Menon
CTO, Loop Health
“
They treated our budget like their own and shipped something that actually moved our numbers. We’ve doubled our engagement since.
MF
Marcus Feldt
Founder, Vertexa
“
Working directly with senior engineers made all the difference. Clear communication, no surprises, and code we’re proud to own.
EN
Elena Novak
Head of Product, Northwind
Edgar Spencer, Founder of DELLIUX LIMITED
Verified on LinkedIn

See what clients actually say.

Read recommendations from the people we've built for on Edgar's LinkedIn — then contact us for real project examples and a live walkthrough.

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Let's build something worth keeping.

Tell us about your project and we'll map out the fastest path to a product your users love.

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