Java Software Engineer

As a Java Software Engineer you will play a critical role in both the sustainment of the current environment and the delivery of new user-facing capabilities. The selected individual will develop solutions to complex technical issues and problems that impact multiple areas or disciplines; regularly employ ingenuity and creativity to develop new technical solutions and systems to achieve functional objectives.

As a Software Engineer in Leidos, you will be immersed in one of our key programmes. On behalf of our central government customer, you will have direct impact on the current and future iterations of one of our most important pieces of critical national infrastructure.

What will I be doing?

• Develop, debug, test, document, and deploy software enhancements aligned with the Software Development Strategy.
• Design and implement modern single-page applications using React and TypeScript.
• Consume and integrate with REST APIs, maintaining clean separation from backend and legacy systems.
• Support delivery commitments across projects and releases.
• Contribute to the continuous validation and maintenance of the build and deployment pipeline, identifying issues, supporting fixes, and working with the wider team to ensure reliable build, test, and deployment processes.
• Investigate, identify, and mitigate software and system issues.
• Collaborate closely with backend and test engineers to ensure end-to-end quality.
• Work with senior engineers to design UI solutions based on user needs and system constraints.
• Produce clear technical documentation and maintain readable, well-structured code.
• Participate fully in the Agile software development lifecycle.
• Use tooling such as Bitbucket, Jira, Jenkins, and Confluence to manage code, work items, and builds.
• Write and maintain unit and integration tests as part of normal delivery.
• Contribute to and support UI and API test automation efforts.
• Communicate progress, risks, and technical decisions clearly to stakeholders.
• Apply engineering best practices and standard operating procedures.
• Influence technical decisions through clear, evidence-based recommendations.

• Strong experience building SPAs with React and TypeScript.
• Experience integrating front-end applications with REST APIs.
• Familiarity with Agile software development processes and working within iterative delivery models.
• Familiarity with the Atlassian tool suite (e.g. Jira, Bitbucket, Bamboo), or equivalent tooling, with a solid understanding of CI/CD concepts, workflows, and practices.
• Ability to perform complex engineering tasks with minimal supervision.
• Experience producing technical documentation.
• Proven experience writing unit and integration tests.

Desirable Skills and Experience

• Java experience (Java 17+/21), particularly in service or API development.
• Experience with other SPA frameworks.
• Familiarity with modern integration patterns (e.g. Saga, adapters).
• C/C++ experience.
• Perl, Python, and/or bash scripting experience.

Clearance Requirements: Successful candidates will be required to be willing and able to obtain UK Security Clearances - this requires a minimum of 5 years residency in the UK

Pulled from the full job description

• Annual leave

• Company pension

• Private medical insurance

• Cycle to work scheme

• Work from home, 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)

• Flexi-Time Working, Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

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 growth whilst 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., Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.