UX Front End Developer - National Security & Defence

Join the Growth Story at Envitia

Envitia operates at the heart of the UK’s most sensitive and high-profile operations. Our approach is entirely mission-focused, enabling customers to see more, decide faster, and act with confidence across complex domains.

We deliver situational awareness and information advantage across C5

ISR, fusing cyber, geospatial, and kinetic data into an operational picture. This transforms fragmented data into a shared understanding of the battlespace, delivering actionable insight when it matters most.

Our solutions are secure-by-design, built from the ground up to protect sensitive information and ensure resilience in contested environments. We simplify complex heterogeneous data sources into a rich picture of fused intelligence, providing a digital backbone that underpins success.

We operate as small teams delivering fast value, blending deep technical expertise with agile methods to deliver measurable outcomes. Every engagement focuses on capability, clarity, and confidence for those who protect the nation.

A career with Envitia enables you to work with mission driven innovation.

We’re thrilled to announce that Envitia has been named one of the Sunday Times Top 100 Medium-Sized Companies to Work For in 2025— a prestigious recognition that highlights our commitment to creating an outstanding workplace where innovation, collaboration, and personal growth thrive.

As a UX Front-End Developer at Envitia, you will design, prototype, and build intuitive, accessible, and high-performing user interfaces that support secure government applications. Working within our Consulting division, you will contribute directly to enhancing mission-critical digital services used across our Security & Intelligence customer base.

In this role, you’ll bring together strong UX and UI expertise with practical front-end development skills to translate complex user needs into elegant, reliable solutions. You’ll work collaboratively with product owners, user researchers, backend engineers, and security architects to ensure that usability, accessibility, and performance requirements are met throughout the development lifecycle.

This position is well suited to someone who thrives in technically challenging environments, enjoys solving real user problems, and is confident operating within highly secure, multidisciplinary project teams. You’ll have the opportunity to shape the user experience of impactful national-level systems while advancing Envitia’s reputation for delivering high-quality, user-centred digital solutions.

• Conduct user-centred design activities, including wire framing, prototyping, workflow creation and iterative usability testing.
• Translate user research insights into intuitive interface designs aligned with GDS standards, industry UX best practice, or customer-specific guidelines.
• Develop and maintain UI design systems, reusable component libraries and accessibility-compliant layouts.

• Build high-quality front-end components using modern frameworks such as React, Angular or Vue, alongside Type Script/JavaScript.
• Implement responsive, accessible and performant interfaces suitable for secure and restricted environments.
• Integrate front-end applications with backend services, APIs and operational data sources.
• Optimise UI performance for speed, accessibility and use in constrained network conditions.

• Work within cross-functional Agile teams to deliver user-focused digital services from discovery through to deployment.
• Contribute to sprint ceremonies, backlog refinement and peer code/design reviews.
• Collaborate closely with UX researchers, developers, testers and security/solution architects to ensure seamless, end-to-end delivery.
• Produce clear documentation, interface specifications and design artefacts to support delivery and ongoing maintenance.

• Ensure all interfaces meet required accessibility standards (e.g., WCAG 2.1 AA or client-specific mandates).
• Apply secure coding and design principles when working within classified or sensitive environments.
• Adhere to…