Custom Web App Developmentfor businesses that have outgrown off-the-shelf
Bespoke web applications built in React, Node, and Supabase — engineered for scale, secured by default, and fully owned by you.
Projects from £8,000 · Fixed pricing · UK based
We design and build bespoke web applications for UK businesses that have hit the limits of SaaS tools and spreadsheets. From internal operations dashboards to multi-tenant SaaS products and marketplace platforms, we ship production-grade software that your team and your customers can rely on.
Our stack is React, TypeScript, Node, and Supabase (Postgres + Auth + Storage + Edge Functions) with Stripe for billing and Resend for transactional email. It's modern, fast, secure, and — crucially — easy for any competent dev team to take over later. You own the codebase from day one.
Every project starts with a discovery sprint: user flows, data model, integrations, and a clickable prototype. From there we build in two-week sprints with weekly demos, so you're never surprised by what's been built and we can pivot quickly as you learn from real usage.
Everything you need to launch
How it works
Discovery Sprint
1–2 weeks of user research, flows, data modelling, and prototype.
Build Sprints
2-week sprints with weekly demos. You see real progress every week.
Beta & Iterate
Closed beta with real users, iterate, harden, and instrument analytics.
Launch & Maintain
Public launch, SLA-backed support, and an ongoing roadmap.
Recent projects
"Katie built our entire platform from concept to launch. The code is clean, the design is beautiful, and our users love it. Genuinely senior work."
James
MYOS — Video Storytelling Platform
"We've worked with three dev shops before. Katie delivered more in 8 weeks than they did in 9 months. Highly recommend."
Priya
EdTech Startup, London
Frequently asked questions
What's the typical budget for a custom web app?+
Most custom web apps are £15,000–£60,000 depending on scope. Internal tools and operations dashboards start around £8,000. Enterprise-grade platforms with complex integrations can be £80,000+.
Do I own the code?+
Always. The codebase is yours from day one in your own GitHub organisation. We never lock clients in.
What tech stack do you use and why?+
React + TypeScript on the frontend, Node and Supabase (Postgres) on the backend, with Stripe for billing. It's modern, fast, secure, and easy for any agency or in-house team to take over.
Can you integrate with our existing tools (HubSpot, Salesforce, Xero, etc.)?+
Yes — API integrations, webhooks, and middleware are core to most projects. We've integrated with CRMs, accounting systems, ESPs, payment providers, and bespoke legacy APIs.
Do you offer ongoing maintenance after launch?+
Yes — SLA-backed support plans starting at £300/month covering monitoring, security updates, bug fixes, and a monthly improvement allowance.
How do you handle security and compliance?+
Row-level security in the database, OWASP top-10 mitigations, encrypted storage, audit logging, and GDPR-ready data handling. We can support Cyber Essentials and SOC 2 readiness for enterprise clients.
Explore Our Other Services
Local web design across the UK
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Got a complex app idea? Let's scope it.
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