React Developers in the UK

About React Developers

Hire senior React and Next.js engineers who have been shipping production front-ends since 2021. Bring on one dedicated developer or a small product team for SaaS dashboards, customer portals, and component-driven web apps, on a monthly rolling contract or a fixed scope. You direct the roadmap and talk to the engineer writing your code, never an account manager.

What the engagement includes

• Senior engineers only, never interns, and one named owner you talk to directly for the whole engagement.
• TypeScript by default, with the component structure, state management, and data-fetching approach chosen deliberately rather than copied from whatever tutorial was open.
• Tests where they earn their keep: component and integration tests with React Testing Library on Vitest or Jest, running through CI on every pull request.
• Accessibility and performance built in, not bolted on: keyboard and screen-reader support, lazy-loaded routes, a controlled bundle size, and Core Web Vitals that hold up on real mid-range phones.
• You own the GitHub repo, the hosting, and the pipeline from day one, so there is a clean handover or exit whenever you want it.
• Flat INR with GST for Indian clients, USD, CAD, GBP, or AED via Wise for overseas teams, a 24-hour response, and full IP transfer on payment.

Location boxes, BPSS and a modules register: React engineers in India on UK public sector work

A UK public body buying React engineers through Digital Outcomes and Specialists 7, the framework run by the Government Commercial Agency, which was the Crown Commercial Service until 1 April 2026, settles where the work may happen in three separate boxes of the development security schedule, Call-Off Schedule 9C. One covers where Government Data is stored, accessed or handled, one covers Support Locations, defined as any place from which people access the code or the data, and one covers Development Activity. Each box offers the United Kingdom only, territories covered by adequacy regulations under section 17A of the Data Protection Act 2018, or anywhere in the world the buyer has not prohibited. India has no UK adequacy regulation, and a box left blank defaults to the UK or an adequate territory, so an order form nobody completed quietly rules out an Indian team. The third option tells the buyer to check the Cabinet Office list of prohibited countries and agree a written list of permitted locations before any work starts, and a Prohibition Notice served later gives the supplier 40 working days to stop. This is where a front-end team has an advantage worth designing for. Because a Support Location includes access to the code, India will be on that list whatever happens; what can be kept off it is citizen data. A React application can be built against the API contract rather than the live service, with Mock Service Worker answering requests from synthetic fixtures and Storybook rendering every component state from the same fixtures, so the boxes can be ticked differently: development abroad, Government Data in the UK only. The Government Security Classifications Policy points the same way, since contractors may release OFFICIAL information marked SENSITIVE to parts of their organisation overseas only through whatever approval process the contracting authority mandates. Which boxes your order form should tick is for your security adviser.

Vetting is the clause that usually trips an offshore bid, because of a single line in it. Schedule 9C bars anyone from development activity, from access to the development environment or from managing the service unless they have passed the checks it lists or the buyer has given prior written permission for a named individual to perform a specific role. The first check is the Baseline Personnel Security Standard, version 7.0 of June 2024, and the schedule says it verifies nationality and immigration status so as to demonstrate a right to work in the United Kingdom. An engineer employed and working in India has no UK right to work to demonstrate, so the honest route is to ask for the alternative the schedule already provides, named written permission or other checks the buyer specifies, rather than to pretend the standard fits. The rest of BPSS travels well. It covers identity, at least three years of employment or academic history with evidence for any gap of six months or more, and unspent convictions. Because the Disclosure and Barring Service cannot see overseas records, it calls for an overseas police record check, and where someone has lived abroad for six months or more in the last three years it asks for proof of that residence and overseas references. So each React engineer proposed arrives with that evidence already assembled, filed under the name the permission will carry. BPSS opens OFFICIAL information and nothing above it, and the standard states that it does not allow an overseas supplier or contractor access to, or knowledge of, assets classified SECRET or above, so a service needing that is not one to staff from abroad. The schedule also requires every member of supplier staff to pass security training each calendar year, covering phishing and the Secure by Design principles, and access to be removed within 24 hours of a buyer's request. Whether a named permission is acceptable is for your security team.

Where the buyer marks the contract higher-risk, and Schedule 9C treats it as higher-risk whenever no assessment is recorded, a React codebase meets a paperwork duty sized to its dependency tree. Any module, library or framework the supplier did not write that forms part of the code, or that the system calls on while running, is a Third-party Software Module, and each needs its source and integrity verified by cryptographic signing or a measure giving the same assurance, proportionate diligence on known vulnerabilities and continued monitoring. The supplier keeps a Modules Register naming each module's developer, the diligence done, known vulnerabilities and how their effect is contained, updates it within 10 working days of learning of a vulnerability and at least every six months, and sends the buyer a copy whenever it changes. For a front end the definition draws a useful line. Packages bundled into the JavaScript a citizen's browser downloads are part of the code. A script tag loading an analytics or chat widget from someone else's server is accessed by the system in operation, so it counts as well. The build chain of Vite, ESLint and the test runner never ships, and sits more naturally under tooling. npm's registry signatures and provenance attestations supply the integrity check, and an inventory generated from the lockfile in CI supplies the register's rows. Tooling has a register of its own. Any software through which the code or the data is accessed, analysed or modified is a Third-party Tool, and the Register of Support Locations and Third-party Tools records each provider's full legal name, country of registration, registration number and registered address. A React team leans on more of these than most: hosted visual regression, cross-browser device clouds, preview deployments and the design tool the components are drawn in. Each is entered before first use, because the schedule forbids using one that is not. Whether your contract is higher-risk is the buyer's decision, recorded on the order form.

How we work with UK clients

UK engagements tend to start with procurement questions rather than technical ones. Who holds the data, which law governs the contract, whether you can produce a record of processing if the ICO asks. We answer those in the proposal instead of leaving them to a legal review three weeks in, because that review is where UK projects usually stall.

Invoicing is the other thing worth settling early. We are outside the UK, so services we supply generally fall under the reverse charge and your finance team accounts for the VAT rather than paying it to us. Our invoices say so explicitly. We quote in pounds, the figure does not move with the exchange rate mid-project, and payment by bank transfer avoids the card fees that make a five-figure invoice unnecessarily expensive.

Questions UK clients ask

React Developers: common questions

Other markets we work in