Senior Software Engineer

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 Senior Software Engineer who enjoys solving difficult technical challenges and wants their work to have real operational impact.

What You’ll Do

As a Senior Software Engineer, 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.
• Utilise Git for version control, ensuring efficient code management and collaboration.Implement cloud services on AWS or Azure, optimising scalability, performance, and reliability.
• Develop responsive and interactive user interfaces using JavaScript/TypeScript (React).
• Design and implement backend solutions using Java, Python, or Go, ensuring robustness and scalability.
• Utilise Docker for containerisation to streamline deployment processes and ensure consistency across environments.
• Implement and maintain CI/CD pipelines to automate software delivery and deployment.
• Write clean, efficient, and well-documented code following industry best practices.
• Participate in code reviews, providing constructive feedback to team members.
• Stay updated with the latest technologies, trends, 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:

• Bachelor's degree in Computer Science, Engineering, or related field.
• Strong proficiency in Git for version control and collaborative development.
• Experience with cloud platforms such as AWS or Azure, including deployment and management of cloud resources.
• 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 containerisation and deployment.
• Knowledge of DevOps processes, including CI/CD pipelines and automated testing frameworks.
• Strong communication and collaboration abilities within a team environment.
• Ability to adapt to a fast-paced, dynamic work environment and learn new technologies quickly.
• Experience with container orchestration tools like Kubernetes.
• Familiarity with Agile development methodologies.
• Understanding of web security principles and best practices.
  
  

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.

We offer competitive salaries and a package that supports your wellbeing and development, including 25 days annual leave + bank holidays, free Private Medical cover and Life Assurance, Generous pension (10% employer, 5% employee contribution), Bonus and Professional development and training support. In addition to secure parking, gym, café & restaurant on site and lots of open break out spaces.

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 (www.gov.uk) 

Interested? 

Please apply!