Security Clearance: Must hold or be eligible for SC clearance Are you ready for your next career challenge? At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams in the UK to address some of the most complex problems in defence, government, safety and security, and transportation. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. We are currently recruiting a Software Engineer to join our Air Traffic Management (ATM) portfolio. This is an exciting opportunity to work on safety critical Air Traffic Control systems, supporting customers who rely on highly reliable, real time software. You will be part of a multidisciplinary engineering team, contributing across the full software lifecycle — from problem analysis and design through to delivery and operational deployment. The role offers variety, exposure to multiple applications, and the chance to work in a highly regulated, safety-focused environment. Typical Duties: You will contribute to the development, maintenance, and support of software used in Air Traffic Control systems. Typical responsibilities include: • Investigating and resolving software and system issues • Developing and maintaining software requirements and designs • Designing, building, and updating software solutions • Supporting change, release, and configuration management activities • Creating and executing software test plans • Ensuring all work follows defined engineering processes and software assurance standards • Working closely with Systems Engineering, Test teams, and project stakeholders • Supporting multiple applications in parallel as required Required Skills: You’ll have a strong software engineering background, ideally within a real-time or safety critical environment, and be comfortable working to defined standards and processes. Essential skills and experience: • Experience developing real-time and/or safety-related software • Knowledge of software development languages such as C, C++ or TAL • Experience with scripting languages such as Python or TACL • Experience across software development, integration, and test • Understanding of configuration management in a software engineering environment • Ability to work across the full project lifecycle, from early phase through to delivery • Strong problem-solving skills with clear technical judgement • Ability to collaborate effectively with engineers, managers, and other stakeholders • Strong written and verbal communication skills What we do for you: At Leidos we are PASSIONATE about customer success, UNITED as a team and INSPIRED to make a difference. We offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance. We provide an employment package that attracts, develops and retains only the best in talent. Our reward scheme includes: • Contributory Pension Scheme • Private Medical Insurance • 33 days Annual Leave (including public and privilege holidays) • Access to Flexible benefits • Flexi Working Who We Are: Leidos UK & EUROPE – we work to make the world safer, healthier, and more efficient through technology, engineering and science. Leidos is a growing company delivering innovative technology and solutions focused on safeguarding critical capabilities and transformation in frontline services, our work in the United Kingdom includes addressing some of the most complex problems in defence, healthcare, government, safety and security, and transportation. Working together as Team Leidos we are helping to transform the UKs defence supply chain by providing an integration of a complex mixture of services, at low risk, using a modern suite of systems that will deliver one version of the truth. For the first time, the MOD will see the whole picture, as it is happening.