Senior software EngineerLocation: This is a Hybrid working role. Whiteley, HampshireClearance Required: This role will require attainment and maintenance of SC clearance.At Leidos, we deliver innovative solutions through the expertise, dedication and diversity of our people. We work alongside customers across Defence, Government, Safety, Security and Transportation. Everything we do is guided by our commitment to doing the right thing for our customers and our colleagues. Our Mission, Vision and Values shape the way we work and the impact we deliver.We are seeking an experienced Software Engineer to join our Air Traffic Management programme. This is an opportunity to play a key role in the development and sustainment of safety-critical, real-time Air Traffic Control systems.As part of a multi-disciplinary engineering team, you will be responsible for delivering complex software solutions across the full software development lifecycle, from requirements analysis and system design through to implementation, integration, testing, deployment and operational support. You will work across multiple applications and technical domains, applying your expertise to solve challenging engineering problems and drive successful project outcomes.You will contribute technical leadership within project teams, influence engineering approaches and design decisions, and collaborate closely with customers, stakeholders and engineering disciplines to ensure the delivery of robust, high-quality software solutions.While knowledge of Air Traffic Management systems would be advantageous, it is not a prerequisite for the role as we recognise that strong software engineering skills are transferable. Successful candidates will receive domain-specific training and support to build their understanding of Air Traffic Management systems and operational practices.Knowledge and ExperienceWe are interested in candidates who can demonstrate significant experience in several of the following areas:Strong software development experience using Ada (83/95), C++, C or similar engineering-focused languagesSoftware design, development and integration within Linux or Unix style environmentsScripting and automation using technologies such as Python, Shell or PerlNetworked and distributed systems, including TCP/IP-based communicationsRequirements analysis, software design, implementation, integration, verification and maintenanceExperience delivering software within safety-critical, mission-critical or high-integrity environmentsConfiguration management, change management and release processesExperience working within structured development lifecycles, including Waterfall and V-Model approachesTypical ResponsibilitiesInvestigation and resolution of complex software and system issuesDefine, develop and maintain software requirements and technical baselinesContribute to software architecture and design decisions across multiple applications and projectsDevelop and implement robust software solutions that meet customer and business requirementsProvide technical leadership and guidance to engineering teamsIdentify, assess and manage technical risks, opportunities and dependenciesSupport project planning, estimation and delivery activitiesWork collaboratively with Systems Engineering, Formal Test, Cyber, DevOps and Programme Management teamsEngage with customers, suppliers and other stakeholders to support delivery objectivesReview engineering deliverables and ensure compliance with applicable standards, processes and best practicesProduce and review technical documentation, design artefacts and engineering reportsSupport operational deployments and customer acceptance activities as requiredQualifications and AttributesStrong problem-solving and analytical skills with the ability to develop innovative solutions to complex technical challengesExcellent written and verbal communication skillsAbility to influence technical direction and support engineering decision-makingExperience working across multiple projects or technical domains simultaneouslyAbility to build effective working relationships with customers, stakeholders and engineering teamsDegree in Computer Science, Software Engineering, Engineering or a related discipline, or equivalent experienceAppointment is subject to the successful candidate holding, or being eligible to obtain, UK Security Check (SC) clearance.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 (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme and much more!)• Flexi-Time WorkingCommitment to Diversity:We welcome applications from every part of the community and are committed to a truly diverse and inclusive culture. We foster a sense of belonging, welcoming all perspectives and contributions, and providing equal access to opportunities and resources for everyone. If you have a disability or need any reasonable adjustments during the application and selection stages please let us know, and we will respond in a way that best fits your needs.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.What Makes Us Different:Purpose: you can use your passion and abilities at Leidos to keep the people you care about safe. We are at the forefront of machine learning, AI, cyber security and solutions. Using your skills in the technology frontline by helping to build a safer world.  You can inspire change.Collaboration: having flexibility to do your job is one of our core benefits, enabling you to become part of our extraordinary team.  We have been empowering our people to work flexibly for years.  Whether you work from home, the office or on customer sites, we will give you the digital tools and the flexibility to work smarter and align your needs and ours.          People: Leidos empowers people from every background to be themselves and gives you the tools to learn new skills by enabling growthwhilst developing. We believe that extraordinary people need opportunities to grow, to be inspired and to inspire others. At Leidos, we invest in technical academies, career rotations and a career development plans that enhance your future.If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.Original Posting:For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.Pay Range:61,500.00-78,800.00The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.SummaryLocation: Fareham, Hampshire, UKType: Full time