Software Developer

Successful candidate must hold a minimum of SC clearance and be willing to undergo DV (Developed Vetting) clearance. More information can be found here - National security vetting: clearance levels - GOV.UK ()

Our client, a leading consultancy in the Defence & Security sector, is currently seeking an experienced Software Developer to join their team on a permanent basis, based in Leatherhead.

Key Responsibilities: • Design, develop, and maintain high-quality software components using Java and C++, with a focus on robustness, performance, and maintainability

• Implement and extend code that interacts with a flexible integration framework for solver coupling and data exchange


• Work closely with clients, domain scientists, and computational engineers-often on-site-to understand requirements and translate them into effective software solutions


• Contribute to defining and evolving software architecture, balancing performance, scalability, and long-term maintainability


• Write clean, well-documented, and testable code in line with scientific software development best practices


• Participate regularly in code reviews, debugging sessions, and performance profiling to improve code quality across the team


• Support and mentor junior developers through technical guidance, constructive review, and knowledge sharing


• Over time, take on increasing responsibility for guiding technical direction and contributing to the planning, delivery and management of project work


• Help develop client relationships and contribute to development of new business, such as through writing effective proposals


• Thrive in a consultancy environment solving real-world, high-consequence challenges

Job Requirements: • Professional experience developing software in Java and C++

• Practical experience applying object-oriented design principles and modular software architectures


• Familiarity with collaborative development practices, including Git and CI/CD pipelines


• Experience working across the full software development lifecycle, including design, implementation, testing, and maintenance


• Knowledge of software testing techniques and a commitment to writing reliable, maintainable code


• Solid analytical and problem-solving skills, with the ability to work effectively both independently and as part of a multidisciplinary team


• The confidence and communication skills to work directly with clients and technical stakeholders


• Sole UK nationality, due to the nature of the work

Desirable Skills: • Experience writing unit tests using JUnit and Google Test Frameworks

• Solid understanding of numerical methods and scientific computing principles


• Background in physics, applied mathematics, or engineering


• Experience in development with Fortran 90


• Experience in SQL database development


• Experience using the Java Spring framework


• Experience working in the defence sector

Benefits: • Competitive salary with yearly reviews

• 25 days holiday + the opportunity to buy 5 days


• A company with its heart in the right place and a welcoming work culture


• Happy to talk flexible working


• Enhanced parental benefits


• Company pension scheme


• Targeted professional development


• Life assurance


• Private healthcare membership


• Bonus scheme linked to company performance


• Paid membership fees to a professional institution


• Support in attaining professional membership


• Cycle to work scheme


• Season rail ticket loan


• Additional optional benefits tailored to your personal requirements

If you are an experienced Software Developer seeking a new challenge and wish to further develop your technical and leadership skills, we would love to hear from you. Apply now to join our client's impactful and dynamic team.

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