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Senior Frontend Developer (React) 

Nationwide | Hybrid, 50% office attendance where you live within reasonable commuting distance of an NEC SWS office | Permanent | SC eligibility is essential.

Join us and help shape the future of frontend delivery across large national public service systems. We are looking for a Senior Frontend Developer who can bring strong technical expertise, help drive the team forward, and play a key role in turning complex delivery goals into successful outcomes. 

In this role, you will shape frontend architecture, lead the design of reusable components, and help set coding and engineering standards. You will mentor other engineers, review code, and work closely with stakeholders to turn complex requirements into robust, maintainable solutions. You will also tackle important challenges in usability, accessibility, security, performance, and maintainability in secure, operationally sensitive environments. 

The role offers the opportunity to contribute across major national programmes, spanning justice and probation, national licensing, and beyond. It is well suited to an engineer who wants real technical influence, enjoys helping teams succeed, and wants to play a meaningful part in developing the next generation of large-scale public-sector services. 

What you will do 

• Build and deliver frontend features end-to-end using React, Next.js and TypeScript. 

• Shape frontend architecture, standards and implementation patterns. 

• Design and evolve reusable components and shared UI approaches 

• Improve performance, maintainability and delivery confidence across the frontend. 

• Help ensure accessibility is built in from the start, with WCAG 2.2 AA in mind. 

• Guide testing approaches across unit, integration and end-to-end levels. 

• Work closely with product, design, QA and back-end engineers to shape solutions early. 

• Mentor engineers through peer review, technical guidance and day-to-day collaboration 

• Contribute to Frontend practices and reusable approaches that can support other national systems over time. 

What we are looking for 

• Strong professional experience building modern front ends in production. 

• Deep hands-on experience with React. 

• Strong experience with Next.js. 

• Strong TypeScript skills and experience in building scalable, maintainable codebases. 

• Good understanding of Frontend architecture, state management, performance optimisation and modern engineering practices. 

• Experience improving quality through testing, code review and practical engineering standards. 

• Strong accessibility awareness and experience building inclusive digital services. 

• Ability to make sound technical decisions and balance short-term delivery with long-term maintainability. 

• Experience collaborating effectively with product, design, QA and back-end engineering. 

• A senior mindset, someone who can lead through judgement, ownership and hands-on delivery. 

Desirable experience 

• GOV.UK Design System and Government Service Standard. 

• Storybook or similar UI documentation tooling. 

• Frontend security fundamentals, including XSS and CSRF awareness. 

• Cloud-based delivery on AWS or Azure. 

• Experience working in secure, regulated, or operationally sensitive environments. 

Why this role 

This is a chance to work on a service with clear national importance and real operational impact. You will shape the frontend direction for a major public-sector transformation, build a future-ready platform that improves productivity, strengthens security, and supports better decision-making across complex casework, rather than just implementing tickets. 

Security clearance and eligibility 

This role may require Security Check, SC, clearance. Candidates do not need to hold current SC clearance, but where clearance is required, they must be eligible to obtain it and able to satisfy the necessary residency and vetting requirements.

Employees of NECSWS are entitled to the following Company funded benefits:

25 days paid holiday (includes 3 company nominated days) with the option to buy/sell up to 5 days

4 x basic salary life assurance cover

A Group Pension Plan with fantastic employer contributions

A selection of tax efficient flexible benefits to suit your individual needs

The role offers a competitive salary.

OTHER INFORMATION

Candidates must be able to demonstrate a pre-existing right to work and travel within the EU. Documentary evidence will be required.

All offers are subject to satisfactory vetting and reference checks. Depending on the nature of the role a Disclosure Barring Service (DBS) check may also be required.

NECSWS is an equal opportunities employer, welcoming applications from all communities.