Front End Developer - DV Cleared

CBSbutler Ltd.; Greater London; On-site; GBP 23,985,000 - 25,904,000; Full time

Job summary

CBSbutler Ltd. is seeking an experienced Front End Developer to build secure, role-aware interfaces for a next-generation Defence Intelligence platform in London. You will collaborate with UX/UI, Back End teams and stakeholders to deliver accessible interfaces in a mission-critical environment.

Role requires strong React/TypeScript expertise, experience with REST APIs, and a secure delivery mindset. Current DV clearance and four days onsite at an MOD location are mandatory.

Qualifications

• Demonstrable experience delivering software within MOD, Defence, National Security or similarly secure environments.
• Strong commercial React development experience.
• Strong TypeScript capability.
• Experience consuming REST APIs and collaborating closely with backend engineering teams.
• Experience building responsive, accessible and maintainable user interfaces.
• Good understanding of component-based development and design system principles.
• Experience using Git within agile delivery environments.

Responsibilities

• Develop and maintain frontend applications using React and TypeScript.
• Build reusable UI components aligned with a coherent design system and component library.
• Work closely with UX Designers to translate user journeys, wireframes and prototypes into production-ready interfaces.
• Integrate frontend applications with REST APIs, workflow services and identity/access mechanisms.
• Develop role-aware dashboards, task views, status tracking and operational work queues.
• Apply accessibility, responsive design and usability best practices.
• Participate in agile ceremonies, sprint delivery, demonstrations and user feedback sessions.
• Contribute to frontend testing, quality assurance and continuous improvement.

Skills

React

TypeScript

REST APIs

Accessibility

Agile

Git

Unit testing

Design system

Tools

Material UI

GOV.UK Design System

Job description

Front End Developer

£500-£540 per day | Outside IR35

React | TypeScript | Secure, Analyst-Facing Applications

• Location: London (MOD site)
• Working Pattern: 4 days per week onsite
• Clearance: Current DV Security Clearance required
• Background: MOD / Defence / National Security experience required

The Opportunity

We're looking for an experienced Front End Developer to build intuitive, secure and role-aware interfaces for a next-generation Defence Intelligence platform.

You'll work closely with UX Designers, Back End Developers and wider delivery teams to turn complex operational requirements into accessible, maintainable and high-performing applications that improve visibility, streamline workflows and support users in a mission-critical environment.

This is an excellent opportunity to work on modern digital capabilities within a highly secure Defence environment.

About the Programme

This programme is delivering an AI-enabled Defence Intelligence capability designed to improve visibility of operational information, reduce administrative burden and support faster, more informed decision-making.

As part of an agile, multidisciplinary team, you'll help deliver modern frontend applications that integrate with secure backend services and existing Defence platforms.

Key Responsibilities

• Develop and maintain frontend applications using React and TypeScript.
• Build reusable UI components aligned with a coherent design system and component library.
• Work closely with UX Designers to translate user journeys, wireframes and prototypes into production-ready interfaces.
• Integrate frontend applications with REST APIs, workflow services and identity/access mechanisms.
• Develop role-aware dashboards, task views, status tracking and operational work queues.
• Apply accessibility, responsive design and usability best practices.
• Participate in agile ceremonies, sprint delivery, demonstrations and user feedback sessions.
• Contribute to frontend testing, quality assurance and continuous improvement.

Essential Skills & Experience

• Demonstrable experience delivering software within MOD, Defence, National Security or similarly secure environments.
• Strong commercial React development experience.
• Strong TypeScript capability.
• Experience consuming REST APIs and collaborating closely with backend engineering teams.
• Experience building responsive, accessible and maintainable user interfaces.
• Good understanding of component-based development and design system principles.
• Experience using Git within agile delivery environments.

Desirable Experience

• Experience working with Figma and modern UX/design workflows.
• Experience with Material UI, GOV.UK Design System, MOD design patterns or equivalent component frameworks.
• Experience developing workflow-driven applications.
• Experience implementing secure authentication and role-based access control.
• Experience developing search-led user interfaces.
• Experience supporting applications deployed in classified or highly regulated environments.

Mandatory Requirements

• Current DV Security Clearance.
• Ability to work onsite at an MOD location in London four days per week.
• Previous experience delivering within MOD, Defence, Defence Intelligence, Strategic Command or wider National Security organisations.
• Comfortable working with OFFICIAL-SENSITIVE and classified material where authorised.

Ways of Working

• Agile delivery within a multidisciplinary team.
• Close collaboration with Defence stakeholders, Product, Delivery, UX and Engineering teams.
• Secure-by-design approach with a strong focus on audit, traceability, access control and assurance.
• Practical focus on creating intuitive, reliable applications while maintaining operational accountability.

What We're Looking For

We're interested in Front End Developers who can demonstrate:

• Successful delivery within secure MOD or Defence environments.
• Strong React and TypeScript development experience.
• The ability to turn complex UX requirements into accessible, maintainable and intuitive interfaces.
• Excellent communication skills across technical and non-technical stakeholders.
• A practical understanding of agile delivery and modern frontend engineering.
• Awareness of secure system delivery, accreditation considerations and operational governance.

Rate: £500-£540 per day (Outside IR35)

Location: London (4 days onsite)

Clearance: Current DV Security Clearance required