Senior Software Developer

Location: HM Naval Base, Portsmouth (HMNBP)

Service Area: Information Management & Technology Department

Hours of Work: 37 Per week

Contract Type: Permanent

Salary: £50,000 to £57,000

What you will be doing:

You’ll be responsible for designing, building and maintaining the bespoke software and codebases that underpin digital solutions, focuing on advanced C# / .NET development, code quality and the technical mentoring of other developers.

• Designing, developing and maintaining C# / .NET applications, services and integrations across our codebases.

• Ongoing maintenance, refactoring and improvement of our existing codebases to keep them secure and supportable

• Development and maintenance of C# plugins, custom connectors and server-side customisations on the Power Platform

• Creation and maintenance of customisations including plugins, PCFs and JavaScript web resources

• Code reviews, coding standards and technical documentation

What you will bring:

• Experience developing applications in C# and the .NET framework/.NET.

• An appreciation for clean code, testing and software design best practice.

You’ll get:

• 25 days holiday plus bank holidays

• Holiday purchase scheme, following successful completion of probation period

• Early finish on a Friday

• Discretionary company bonus scheme

• Enhanced pension scheme – employee contribution 4% and company contribution 6%, or you can increase your contribution to 6% and company contribution will increase to 10%

• Life assurance x 4 (subject to scheme T&C’s)

• Access to our internal benefits and discounts programme for all colleagues

• Cycle to work scheme

• Group income protection

• Flexible parental benefits (if applicable)

• Free parking onsite

• Access to our Internal employee assistance network, giving you the opportunity to reach the heights of success within your new position.

• Continued professional career development

• Kudos reward opportunities (internal achievements scheme)

• Occupational Health & Wellbeing Services

• Discount off entry into the Historic Dockyard

Application process:

Applications are urged to apply prior to the advertising closing date Friday 17th July 2026

Background checks & security

Please note that due to the nature of the site we are based on and the work carried out, once offered we carry out a number of pre-employment checks which include UKSV clearance applications – you will need to be eligible for this and willing to go through the process. For more information, please speak with the Talent & Recruitment team.

About us:

At KBS Maritime, we’re not just another company – we’re an exciting and dynamic joint venture between industry leaders BAE Systems and KBR. Our team is dedicated to providing Asset Management, Infrastructure Management, Energy Solutions and Alongside Services at His Majesty’s Naval Base Portsmouth (HMNBP), the beating heart of the Royal Navy.

With almost two-thirds of the Royal Navy’s surface ships stationed at HMNBP, working with KBS Maritime means being at the forefront of innovation and progress. We operate in a unique and fascinating environment, with a mix of historic dockyards and cutting-edge infrastructure that’s unlike any other.

By delivering state of the art solutions to the Royal Navy, KBS Maritime offers the chance to work on projects that make a real difference to the safety, security, and sustainability of the UK’s National Defence and Security. But it’s not just about the work – at KBS Maritime, we believe in the value of our people. We have the ethos of a small business, which means we value and empower our team members to succeed.

KBS Maritime is committed to building a diverse workforce and fostering an inclusive workplace. We welcome applications from individuals of every social or cultural background, age, gender, ability, sexual orientation, and belief.

We will make reasonable adjustments to the recruitment process to accommodate any disability. In the first instance, if you require this job advert in an alternative format, or require any assistance, please contact recruitment@kbsmaritime.com