Custom portals, dashboards, booking systems, and internal tools — secure, scalable, and built on Flask and FastAPI. From £2,500.
Some businesses need more than a brochure website. Client portals, booking systems, admin dashboards, internal tools, membership areas, and workflow automation all require custom logic, user accounts, and reliable infrastructure. That is what we build.
At ZSM Digital, we develop full-stack web applications for UK companies that have outgrown spreadsheets, manual processes, or off-the-shelf software that almost fits but never quite does.
If your team repeats the same manual steps daily, if customers need to log in and manage their own data, or if you need a system that connects payments, email, and third-party APIs in one place — a custom web application is often the most cost-effective long-term answer.
Typical projects include customer portals, appointment and booking systems, quote configurators, inventory and order management, staff dashboards, API integrations, and internal tools that replace fragmented spreadsheets. Every project is scoped individually with agreed deliverables and a fixed quote before work begins.
We build on Flask and FastAPI with Python — proven, maintainable, and well suited to business applications. That includes user authentication, role-based access, database design (PostgreSQL or MySQL), REST APIs, admin panels, and deployment on secure UK-friendly hosting.
User data, payments, and business-critical workflows demand proper security. We implement authentication, access control, SSL, secure session handling, and sensible data architecture from the start — not bolted on after launch.
Web applications start from £2,500 but every project is different. We run a proper discovery phase, document requirements, agree milestones, and quote a fixed price before development starts. No open-ended hourly billing without visibility.
Purpose-built software for businesses that need more than a standard website.
Fast, credible brochure sites for trades, local services, and growing UK businesses.
Shopify stores and custom online shops built to convert — not generic templates.
Portals, dashboards, booking systems, and custom tools built on modern Python stacks.
Security updates, backups, monitoring, and direct developer access from £49/month.
Technical audits, local visibility, on-page optimisation, and ongoing search growth.
Custom applications start from £2,500, scoped and quoted individually. Timeline and deliverables agreed upfront. See pricing overview or contact us to discuss your project.
Get a Custom Quote →Projects typically start from £2,500 depending on complexity, integrations, and user roles. We scope properly and provide a fixed quote before development begins.
We build with Python using Flask or FastAPI, PostgreSQL or MySQL for data, and modern front-end techniques. The stack is chosen for maintainability and long-term support.
Yes. We regularly integrate payment gateways (Stripe, PayPal), email platforms, CRMs, accounting tools, and third-party APIs — scoped as part of your project.
Timelines depend on scope — smaller tools may take a few weeks; larger platforms take longer. You receive a realistic schedule with milestones before work starts.
Yes. On completion you receive the codebase, documentation, and deployment details. We also offer ongoing support and maintenance if you want us to manage updates.
Yes. User accounts, login, password reset, and role-based access (admin, staff, customer) are standard in most application builds.
Yes. If your current tool is slow, insecure, or impossible to extend, we can plan a migration to a modern platform with minimal disruption.
We deploy on ZSM hosting with SSL and recommend ongoing maintenance. Hosting price and terms are documented in your project contract.
Tell us what you need — we'll recommend the right approach and give you a clear, fixed quote.
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