JavaScript

JavaScript and TypeScript are what we write every day. Whether that is a marketing site that has to score 90+ on mobile, an internal dashboard replacing a spreadsheet, or a customer portal handling logins and invoices, the framework choice matters less than whether the thing is fast, maintainable and typed. We build all three from our Southampton studio.

Everything we ship is written in TypeScript rather than plain JavaScript. It catches a whole class of bugs before your customers do, and it makes the codebase readable for whoever maintains it next, including you.

Our JavaScript and TypeScript Expertise

1. React and Next.js

• 1

  Our default stack

  Server-rendered, SEO-friendly and fast by construction. Full detail on our Next.js development page.

• 2

  Server Components and Server Actions

  Data fetching and form handling on the server, which keeps JavaScript bundles small and pages quick on mid-range phones.

• 3

  Component design systems

  Reusable, accessible components so a site stays consistent as it grows past a handful of pages.

2. Web Applications and Dashboards

• 1

  Client and staff portals

  Authentication, role-based permissions, document handling and billing views, built as part of our Custom Systems work.

• 2

  Admin panels and reporting

  Replacing shared spreadsheets with something auditable that two people can use at once without overwriting each other.

• 3

  Booking and scheduling

  Availability logic, calendar integration and automated notifications that reduce phone-tag.

3. APIs and Integration

• 1

  Typed API layers

  Validated request and response boundaries using Zod, so bad data is rejected at the edge instead of corrupting a database.

• 2

  Third-party services

  Stripe, PayPal, Resend, accounting software and CRMs wired in with proper error handling and retries.

• 3

  Backend pairing

  Where throughput matters more than iteration speed, we pair a TypeScript frontend with a Go backend.

4. Performance and Maintenance

• 1

  Bundle discipline

  Code splitting, lazy loading and dependency auditing, because every megabyte of JavaScript is paid for by somebody on 4G.

• 2

  Automated testing

  Jest and Testing Library coverage on the parts that break, run in CI before anything reaches production.

• 3

  Taking over existing codebases

  Inherited React or Vue projects audited, upgraded off end-of-life dependencies and brought back under control.

Where This Fits

For marketing websites, the JavaScript work is already included in our standard packages: Launch Pad (£395), Business Builder (£795) and Authority Site (from £1,995). Applications, portals and bespoke tooling are scoped through Custom Systems (from £4,995) after a free discovery call.

Related services: Next.js, Go, Docker and cloud services.