Frontend Developer (Contract)

Work on Technology That Protects What Matters At SiXworks , we build secure digital solutions that support Defence and National Security missions . Our teams work on complex problems where reliability, security, and speed of innovation matter. We’re looking for a Frontend Developer who enjoys solving difficult technical challenges and wants their work to have real operational impact.

What You’ll Do As a Frontend Developer , you’ll help design, build, and deliver secure digital solutions in highly secure environments. You’ll work alongside engineers, architects, and delivery specialists to develop technology that enables faster, safer decision-making for critical operations. Your work may include:

• Collaborate with the development team to design, develop, and maintain software solutions.
• Develop responsive and interactive user interfaces (e.g. JavaScript/TypeScript and React).
• Write clean, efficient and well-documented code following Software Engineering principles and industry best practices.
• Participate in code reviews, providing and responding to constructive feedback from team members.
• Stay updated with the latest technologies, tools and best practices in software development.

What We’re Looking For We value people who take ownership, think critically, and enjoy working as part of a collaborative team tackling complex challenges. You don’t need to tick every box, but we’re particularly interested in people with skills/experience in:

• Strong proficiency in GIT for version control and collaborative development.
• Proficiency in JavaScript/TypeScript and React for front-end development.
• Familiarity with backend development languages such as Java, Python, or Go.
• Solid understanding of software development principles, algorithms, and data structures.
• Experience with Docker for containerization and deployment.
• Knowledge of DevOps processes, including CI/CD pipelines and automated testing frameworks.
• Strong communication and collaboration abilities within a team environment.
• Just as important are curiosity, strong problem solving ability, and the motivation to continuously improve how technology is designed and delivered.

About SiXworks SiXworks is a specialist digital innovation partner delivering secure, mission-critical technology to Defence and National Security organisations. We focus on digital experimentation, secure-by-design architecture, cloud technologies, and rapid application development to help our customers move faster and stay ahead of evolving challenges. Our team combines expertise from across technology, business, and operational backgrounds including the armed forces creating a collaborative environment where practical thinking and innovation thrive.

Why Join Us Our culture is guided by six principles: Agility, Security, Innovation, Quality, Collaboration and Inclusivity our North Star for how we work. SiXworks is a leading provider of secure digital solutions, specialising in digital experimentation and focused on fail-safe-fast cutting-edge technology solutions deployed in highly secure environments. As an end-to-end digital innovation and delivery partner, we turn complex challenges into mission-critical digital advantages. This is a thrilling time for us, with ambitious plans for growth. We are looking for brilliant, experienced, driven and self-motivated people to join the team on our journey.

A word on UK Security Clearance Due to the secure nature of the position and working environment, you must have or be eligible to obtain Security Clearance. More details relating to UK Security Clearance can be found here: United Kingdom Security Vetting: clearance levels - GOV.UK

Interested? Please apply: