Principal Software Engineer (Front End) (Permanent)

Exceptions above the standard range are managed through governance controls to protect internal equity.We are looking for a highly skilled Principal Software Engineer to join our CS&T DevOps team, who are responsible for developing and supporting applications that improve Through Life Engineering Management of aircraft.The team’s mission is to “make it easy to measure, understand and improve the Through Life Engineering Management of aircraft and provide information and insight to the customers to enable efficient and effective maintenance operations and fleet management.”Reporting to the System Development Manager, you will take ownership of complex software tasks, contribute to Agile ceremonies, support existing applications, and help shape the evolution of our technology stack.What you will do as a Principal Software Engineer:Develop and update high‑quality, maintainable code within a version‑controlled environment. Create and maintain unit tests to support CI/CD pipelines. Work flexibly across roles within the DevOps team, sharing knowledge and adapting to business priorities. Promote and facilitate Agile methodologies throughout the development lifecycle. Provide technical expertise in areas such as data analysis, visualisation, technical publication tooling, integrated logistics support, and health & usage monitoring. Provide accurate time estimates to support bids and cost analysis. Collaborate with management to monitor risks, schedules, and performance. Degree in Computer Science, Engineering, or equivalent experience. Proven experience delivering complex software projects to military or commercial customers. Proficiency in web‑delivered applications across frontend and backend technologies (e.g., C++, C#, ASP.NET, Python, JavaScript, Angular, ReactJS). Experience with CI/CD practices and unit testing. Skilled in working with structured data formats (XML, JSON, SGML) and transformation languages (XSL, XSLT). Strong database design and optimisation skills (SQL Server, Oracle, MariaDB, SQLite). Understanding of data warehousing strategies (e.g., Kimball) and multi‑dimensional data cubes. Solid understanding of networks, systems, and security requirements. Methodical, organised, and comfortable working in an Agile environment.The role operates within a global context, supporting a wide range of IT‑based systems in a technically complex environment. Some travel may be required to support programme activities.Security ClearanceWe offer a comprehensive, company-funded benefits package that supports your wellbeing, career development, and work–life balance. Whether you’re looking to grow professionally, care for your health, or plan for the future, we’re here to help you thrive.Secure your Future: Benefit from our award-winning pension scheme with up to 15% employer contribution. Free access to mental health support, financial advice, and employee-led networks championing inclusion and diversity (Enable, Pride, Equalise, Armed Forces, Carers, Wellbeing and Ethnicity). Rewarding Performance: All employees at management level and below are eligible for our bonus scheme. Never Stop Learning: Free access to 4,000+ online courses via Coursera and LinkedIn Learning. Refer a friend: Receive a financial reward through our referral programme. Spend up to £500 annually on flexible benefits including private healthcare, dental, family cover, tech & lifestyle discounts, gym memberships and more. Flexible working: Flexible hours with hybrid working options. For part time opportunities, please talk to us about what might be possible for this role.For a full list of our company benefits please visit our website.Headquartered in Italy, we employ over 53,000 people worldwide including 8,500 across 9 sites in the UK. At Leonardo we are committed to building an inclusive, accessible, and welcoming workplace. Contract Type:PermanentHybrid Working:Hybrid…