Experienced Software Developer in Leatherhead

Salary range: £45,000 to £65,000 per annum (depending on capability and experience).

Location: Leatherhead.

Working pattern: flexible hybrid working, with time split between the office, client sites and working from home. The role requires travel to the client site in Basingstoke up to 5 days per week.

Closing date: 12th June 2026. We encourage early applications, as vacancies may close once we receive sufficient applications.

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.

Required Qualifications:

• 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.
• Must be able to satisfy clearance criteria for UK National Security Vetting.

Desirable Qualifications:

• 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.
• 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.
• Optional benefits that can be tailored to your personal requirements.