Senior Software Developer
Salisbury, Wiltshire SP4 0JQ • Permanent • Competitive

Senior Software Developer

New Easy Apply
Salisbury, Wiltshire SP4 0JQ On-site Permanent 22 Applications
Competitive
Full-time
Posted 04 Nov 2026
Expires 04 Dec 2026

Job description

  • Job grade: Senior Executive Officer
  • Contract type: Permanent
  • Business area: Digital Advantage - Cyber
  • Type of role: Digital, Information Technology, Science
  • Working pattern: Flexible working, Full-time, Job share, Part-time, Compressed hours
  • Number of jobs available: 2

Location

Dstl Porton Down, Salisbury, Wiltshire SP4 0JQ

At Dstl, our vision is to have a modern way of working efficiently, accommodating and enabling our people to create, collaborate and deliver. To do this successfully in this job will require attendance at a Dstl location, Government Departments including wider MoD or Delivery and Mission Partner premises for at least 80% of your working time.

About the job

Job summary

Are you an experienced software developer who enjoys solving complex technical challenges and delivering innovative solutions with real-world impact?

We are looking for a Senior Software Developer to join our multidisciplinary team, developing software capabilities that support critical national security and defence outcomes. Working alongside scientists, engineers and operational stakeholders, you will design, build and deliver secure, scalable and maintainable software solutions that address challenging technical problems.

This is an exciting opportunity to work across the full software development lifecycle, from concept and prototyping through to implementation, integration and support. You'll have the opportunity to influence technical approaches, contribute to architectural decisions and help shape the future direction of software capabilities used within complex operational environments.

As a senior member of the team, you'll share your knowledge, support the development of colleagues and champion modern software engineering practices that drive quality, innovation and continuous improvement.

We're looking for someone with strong software development expertise, a collaborative mindset and a passion for delivering high-quality technical solutions that make a meaningful difference.

This role is eligible for an additional specialist allowance of £2758 annually subject to meeting extended onboarding requirements. The role may be eligible for additional skills allowances depending on the skills and experience of the applicant.

Dstl recognises the importance of diversity and inclusion as people from diverse backgrounds bring fresh ideas. We are committed to building an inclusive working environment in which each employee fulfils their potential and maximises their contribution.

Job description

What you'll do;

  • Design, develop and maintain high-quality software applications, prototypes and technical capabilities.
  • Translate user needs and technical requirements into practical software solutions.
  • Contribute to software architecture, technical design decisions and technology selection.
  • Develop secure, resilient, scalable and maintainable systems using modern engineering practices.
  • Build, test, debug and support software throughout the development lifecycle.
  • Use version control, automated testing and continuous improvement practices to enhance software quality and delivery.
  • Work collaboratively with engineers, scientists, programme teams and operational stakeholders.
  • Identify opportunities to improve tools, processes and development methodologies.
  • Mentor and support colleagues, sharing technical knowledge and best practice.
  • Keep up to date with emerging technologies and apply innovative approaches where they add value.
  • Ensure all work is conducted in accordance with security, safety and governance requirements.

For more information on the job responsibilities, please see the job profile attached below.

Person specification

What we're looking for

Qualifications

  • Degree in a STEM-related subject such as Computer Science, Software Engineering, Electronic Engineering, Physics, Mathematics or equivalent relevant experience.

Technical Knowledge and Skills

  • Experience developing software using one or more languages such as Python, C, C++, Java, Go or Rust.
  • Experience designing, developing, testing and debugging software within a professional environment.
  • Strong understanding of software engineering best practices, including code quality, testing and maintainability.
  • Experience using Git and collaborative development platforms such as GitHub or GitLab.
  • Experience working within Linux environments, including scripting and automation.
  • Experience working in Agile or iterative development environments.
  • Ability to analyse complex technical challenges and develop effective software solutions.

Experience

  • Experience delivering software solutions within engineering, science, technology or operational environments.
  • Experience translating customer or stakeholder requirements into practical technical solutions.
  • Experience working collaboratively within multidisciplinary teams.
  • Experience balancing quality, risk, delivery timescales and customer requirements to achieve successful outcomes.
  • Experience making sound technical decisions when evaluating multiple solution options.

Please review the attached job description for more detailed information.

Important Information:

Our work in defence, security and intelligence requires our employees to be UK Nationals who are able to gain a high level of security clearance to undertake the projects we are involved in to protect us from security threats.

For this reason, only UK Nationals will be able to apply for this role. If you are an international or dual-national candidate, and you think you have the skills we need, please consider applying to any of our government, security or defence partners.

This role will require Develop Vetting and you should have resided in the UK for the past 10 years.

Behaviours

We'll assess you against these behaviours during the selection process:

  • Delivering at Pace
  • Communicating and Influencing
  • Working Together
  • Changing and Improving

Benefits

Alongside your salary of £41,431, Defence Science and Technology Laboratory contributes £12,002 towards you being a member of the Civil Service Defined Benefit Pension scheme. Find out what benefits a Civil Service Pension provides (opens in a new window).

Benefits

Dstl’s full range of great benefits can be found in the information pack which includes:

  • Financial: An excellent pension scheme starting from 26% employer contribution (find out more here). In Year Rewarding Achievement bonuses and thank you vouchers. Rental deposit scheme and cycle to work scheme.
  • Allowances: This role is eligible for an additional specialist allowance of £2758 annually subject to meeting extended onboarding requirements. The role may be eligible for additional skills allowances depending on the skills and experience of the applicant.
  • Flexible working: Options include alternative working patterns such as; compressed hours (e.g. working a 4 day week/ 9 day fortnight), job shares and annualised hours (agreed number of hours per annum paid monthly i.e. working term-time only).
  • Working hours: Flexibility around your working day (e.g. start time, finish time). Ability to bank hours in a 12 month reference period including the ability to accrue and use 3 days per calendar month.
  • Where you work: Depending on your role, blended working may be available including remote working to suit you and your team. This can be discussed at interview.
  • Annual leave: 25 days pro rata (rising to 30 after 5 years) plus 8 public holidays with the ability to buy/sell 5 additional days per annum.
  • Family: Maternity, adoption or shared parental leave of up to 26 weeks with full pay, an additional 13 weeks statutory pay and a further 13 weeks unpaid
  • Learning and Development: Dstl encourages and supports charterships, accreditations and provides employees access to fully funded apprenticeships up to level 7 (Masters Degree). Dstl will pay for 2 memberships with relevant bodies/institutions. Employees also have access to Civil Service Learning.
  • Facilities: Onsite parking, EV Charging points, restaurants, cafés and gyms.

Things you need to know

Artificial intelligence

Artificial intelligence can be a useful tool to support your application, however, all examples and statements provided must be truthful, factually accurate and taken directly from your own experience. Where plagiarism has been identified (presenting the ideas and experiences of others, or generated by artificial intelligence, as your own) applications may be withdrawn and internal candidates may be subject to disciplinary action. Please see our candidate guidance (opens in a new window) for more information on appropriate and inappropriate use.

Selection process details

This vacancy is using Success Profiles (opens in a new window), and will assess your Behaviours and Experience.

We want you to have your best chance of success in our recruitment process, so If at any stage of the application process you would like help or assistance please contact the Dstl Recruitment Team dstlrecruitment@dstl.gov.uk and we will do all we can to support you.

Sifting will take place week commencing the 23rd of November with interviews taking place from the 30th of November.

Your interview will consist of behavioural and technical competency-based questions. You will also be required to deliver a 10-minute presentation. Further details for the presentation will be provided to candidates invited to interview.




Feedback will only be provided if you attend an interview or assessment.

Security

Successful candidates must meet the security requirements before they can be appointed. The level of security needed is developed vetting (opens in a new window).

See our vetting charter (opens in a new window).
People working with government assets must complete baseline personnel security standard (opens in new window) checks.

Nationality requirements

Open to UK nationals only.

This job is not open to candidates who hold a dual nationality.

Working for the Civil Service

The Civil Service Code (opens in a new window) sets out the standards of behaviour expected of civil servants.

We recruit by merit on the basis of fair and open competition, as outlined in the Civil Service Commission's recruitment principles (opens in a new window).
The Civil Service embraces diversity and promotes equal opportunities. As such, we run a Disability Confident Scheme (DCS) for candidates with disabilities who meet the minimum selection criteria.
The Civil Service also offers a Redeployment Interview Scheme to civil servants who are at risk of redundancy, and who meet the minimum requirements for the advertised vacancy.

Diversity and Inclusion

The Civil Service is committed to attract, retain and invest in talent wherever it is found. To learn more please see the Civil Service People Plan (opens in a new window) and the Civil Service Diversity and Inclusion Strategy (opens in a new window).

Apply and further information

This vacancy is part of the Great Place to Work for Veterans (opens in a new window) initiative.
Once this job has closed, the job advert will no longer be available. You may want to save a copy for your records.

Contact point for applicants

Job contact :

  • Name : Cyber Recruitment Team
  • Email : cyberrecruitment@dstl.gov.uk

Recruitment team

  • Email : dstlrecruitment@dstl.gov.uk

Further information

Should you wish to raise a formal complaint about the Dstl recruitment process you should email dstlrecruitment@dstl.gov.uk stating the nature of the issue. We will respond within 5 working days.

Attachments

Senior Software Developer L5 Opens in new window (pdf, 208kB)
Candidate Information Pack Opens in new window (pdf, 4978kB)

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