Experienced Software Developer in Surrey

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

Location: Leatherhead

Working Pattern: We operate a flexible hybrid working pattern at Frazer‑Nash, with time split between the office, client sites and working from home. This role will require travel to our client site in Basingstoke up to 5 days per week.

CLOSING DATE: 12th June 2026

INTEREST: Are you a software developer who enjoys solving complex problems and wants to grow into a technical leadership role? This position sits within Frazer‑Nash Consultancy’s Software and Digital Architecture capability, where software underpins our ability to deliver high‑impact solutions to critical national challenges. You will be part of a multidisciplinary team working at the intersection of software engineering, numerical modelling, and domain science. Our teams collaborate closely with clients, scientists, and engineers to build robust, scalable software that supports advanced research and operational decision‑making. In the near to medium term, this role involves significant on‑site working with a client in the Basingstoke area, giving you direct exposure to real‑world problems and stakeholders. This is an excellent opportunity for someone who wants to deepen their technical knowledge while developing the skills needed to mentor others, influence technical direction, and lead work packages or projects.

Duties And 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 onsite—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.

Experience Required:

• 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 Experience Includes:

• 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.

Due to the nature of the work that Frazer‑Nash Consultancy undertake, candidates will be required to undergo pre‑employment screening and must be able to satisfy clearance criteria for UK National Security Vetting.

Benefits:

• Competitive salary with yearly reviews
• 25 days holiday + the opportunity to buy 5 days
• A company that has 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 into company performance
• Paid membership fees to a professional institution
• Support in attaining professional membership
• Cycle to work scheme
• Season rail ticket loan
• And further optional benefits you can tailor to your personal requirements