We value your privacy
We use cookies to analyze traffic and improve your experience. You can accept all, decline non-essential cookies, or customize your preferences. See our privacy policy.
Custom software development in
the United Kingdom
Mejix is a senior software consultancy serving the United Kingdom. Working with British brands across London, Manchester, and the wider UK market. We design, build, and modernise products for ambitious teams — fast, focused, and accountable.
What we build for the UK teams
Custom software, built to ship
Product strategy, engineering, and platform work for ambitious teams — delivered by senior engineers, on your timezone.
Product & MVP development
Take a product from sketch to revenue: discovery, design, and full-stack engineering with a senior team.
Platform & SaaS engineering
Multi-tenant SaaS, billing, RBAC, observability, and SOC-2-ready architecture — built to scale past Series A.
Legacy modernisation
Strangle-fig migrations off legacy stacks (PHP, .NET, monoliths) into modern TypeScript / Node / cloud services.
Cloud, DevOps & data
AWS, GCP, Azure, Vercel, Supabase — production-grade infrastructure, CI/CD, and data pipelines without the platform-team headcount.
Integrations & APIs
ERPs, CRMs, payments, identity, EDI, and AI APIs — wired up, documented, and monitored.
Embedded staff augmentation
Senior engineers embedded into your team for 3+ months when you need velocity without the hiring overhead.
Why local matters
A custom software partner in your timezone
On the ground in your market
Working with British brands across London, Manchester, and the wider UK market.
Regional coverage
Serving teams across London, Manchester, Birmingham, Edinburgh.
Senior engagement lead
Full-day overlap with the UK — standups, demos, and reviews on London business hours.
Certified delivery
Shopify Plus Partner, AWS / GCP / Azure aware, SOC-2-ready engineering.
From London DTC brands to UK B2B retailers, we deliver Shopify Plus, AI integration, and custom software with native-English engagement leads and senior engineers in your timezone.
Certifications & Recognitions
Our Work
Case Studies
Dish by Metro
We support DISH by Metro's Dish Pay platform with dedicated cross-functional teams delivering end-to-end product development — a high-volume digital payment solution serving the US restaurant market.
Dine Market
We built the Dine Market B2B wholesale ordering platform from scratch — digitising a food supply chain that previously ran on phone calls and spreadsheets, connecting restaurants and food suppliers across NY/NJ/CT.
Yehuda
We worked closely with Yehuda to develop a custom AI solution for automated diamond detection — reducing manual grading time and enabling the platform to process significantly higher volumes with consistent accuracy.
Reviews & Certifications
Our clients praise us for
our great results
Mejix has successfully created and launched a functional mobile app, which allows the client to reach and diagnose over 5,000 patients. Despite geographically dispersed clients, the team is accommodating and communicative. They've worked hard to deliver the project on time and within the budget.
Candice Wu
Head of Design, Yehuda
FAQ
Custom software development in the United Kingdom — common questions
Do you work with custom software development clients in the United Kingdom?
Yes — Mejix delivers custom software development engagements for clients across the United Kingdom and the surrounding region. From London DTC brands to UK B2B retailers, we deliver Shopify Plus, AI integration, and custom software with native-English engagement leads and senior engineers in your timezone.
Are your engineers in the same timezone as the UK?
Full-day overlap with the UK — standups, demos, and reviews on London business hours. Our engagement leads run discovery, demos, and reviews on your business hours, with senior engineers covering the rest of the workday.
Can you handle VAT, GDPR, and local compliance for the UK?
UK VAT, post-Brexit EU shipping, and GBP / multi-currency Shopify Plus configurations.
What does a typical custom software development engagement look like?
We start with a fixed-scope discovery (1–2 weeks) to align on outcomes, then deliver in 2-week sprints with weekly demos. Most engagements run 3–9 months, with optional retainers for ongoing work.
Can your team meet on-site in the UK?
Yes — our engagement leads travel to the UK for kickoffs, workshops, and quarterly reviews whenever they move the work forward. Day-to-day delivery is remote across our New York and Cluj teams.
How can we help?
Whether you're scoping, migrating, or scaling — our custom software partner team is ready to help teams in the United Kingdom. Full-day overlap with the UK — standups, demos, and reviews on London business hours.