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Senior Software Engineer

Cheltenham, Gloucestershire
Closing date
27 Jun 2024

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As part of Aerospace, Defence, Security and Technology (ADS&T) business, you’ll keep people connected, critical businesses running and advanced communication networks safe.

Join our Technology Solutions team and you’ll work with the finest minds on some of the most challenging engineering projects of our time. Our award-winning team push the boundaries to deliver amazing solutions which meet the constantly evolving needs of our clients across a wide range of markets on a global scale.

If you’re an experienced and talented software engineer who pushes the boundaries and enjoys an exciting and fast paced agile environment, we can offer you the chance to continue to grow your experience and a competitive package to match. If you want to enjoy a rewarding future as part of our team, where we support creativity through cutting edge technology innovation projects - join us.

Working within a TickITplus certified quality environment, you will get involved across the entire Software Development Lifecycle, developing, delivering and supporting a number of cutting edge and bespoke solutions for our clients across varied domains and verticals. The role will require some on-site working at client sites.

The right candidates will need to demonstrate a desire to be challenged and to contribute towards the success and growth of the business. In return we can offer a challenging and rewarding role, career development, training, an empowered and supportive working environment and competitive reward package.

Skills and experience:

The successful candidate will have:

  • Previous experience of full lifecycle web or application development in:
    • Senior level experience with Java.
    • Experience with range of Java frameworks and messaging services.
    • HTML, CSS, JavaScript.
    • Database development (SQL Server or PostgreSQL preferred).
    • Development of web applications with modern web frameworks e.g., React, Angular, Vue etc.
    • Designing, implementing or using Rest APIs, e.g., OpenAPI specification (Swagger) or RESTful API.
  • Experience of the following would be beneficial:
    • C#.
    • .Net (standard or Core).
  • Previous experience of taking a senior role within a development team, for example:
    • You take responsibility for outcomes/delivery as a technical lead.
    • You are a technical expert, the go-to person to solve the most difficult technical challenges.
    • You lead the design and architecture of solutions.
    • You coach your team, sometimes filling a SCRUM Master role and you support and mentor junior team members.

The Individual:

The successful candidate will have:

  • Excellent communication in the English language, both written and verbal, and with colleagues and clients.
  • Experience in documenting agreed solutions according to project standards.
  • Experience in supporting the deployment of the solution, including preparation and delivery of analysis, demonstrations, workshops, training and documentation.
  • The ability to work effectively individually and as part of a team.
  • A strong work ethic and level of professionalism.
  • Solid problem solving, analytical and creative thinking ability.
  • Ability and willingness to quickly understand and document technical solutions.

Read more about how you can thrive with us.

Why work for AtkinsRéalis?

People join us because they share a desire to be at the forefront of the ADS&T Business Unit and deliver outstanding projects. We empower our people to be the professional individuals they want to be, working on projects they feel proud of, making a difference to the world they live in and the legacy they leave behind.

We value diversity and believe that everyone deserves to thrive, without exception. We have signed the MoD's "Women in Defence" and "Women in Aviation and Aerospace" charters. These pledges include providing opportunities for women to succeed at all levels. We're also committed to being a Military friendly employer and have been recognised with the Ministry of Defence's (MoD) Gold Employer Recognition Award.

We develop individuals through a portfolio of training and development courses designed to help you make the best of your abilities and talents. We encourage participation in all forms of training and have an active programme of in-house as well as external training for all our staff.

Meeting your needs:

When you start with us, you'll enjoy "Total Reward", a package that can be tailored to your lifestyle, career and personal needs. From flexible holidays to life assurance, health & wellbeing benefits, and career planning for the senior stage of your career.

Making sure you're supported is important to us. So, if you identify as having a disability, tell us ahead of your interview. And let's talk about any adjustments you might need.

New name, new era. We are AtkinsRéalis.  It will take some time for all our information to update – you can still refer to our fantastic benefits via the link below:

YourReward at SNC-Lavalin​ (

More about us:

AtkinsRéalis, is a top global consultancy with over 100 years of design and engineering expertise. With us, you'll be surrounded by the skills, knowledge and support to help you succeed. Together, we can deliver projects which have a positive, sustainable impact on the world.

AtkinsRéalis, is where UK professionals want to work and stay once they join. We're also a Silver Rating holder in the Aerospace & Defence sector, as per the Financial Times rating of the UK’s leading management consultants.

Check out some of our recent, most exciting projects.

Additional Information:

This role may require security clearance and offers of employment will be dependent on obtaining the relevant level of clearance.  If this is necessary, it will be discussed with you at interview. The vetting process is delivered by United Kingdom Security Vetting (UKSV) and may require candidates to provide proof of residency in the UK of 5 years or longer. If applying to this role please do not make reference to (in conversation) or include in your application or CV, details of any current or previously held security clearance.

We are committed to promoting a diverse and inclusive community - a place where we can all be ourselves, thrive and develop. To help embed inclusion for all, from day one, we offer a range of family friendly, inclusive employment policies, flexible working arrangements and employee networks to support staff from different backgrounds. As an Equal Opportunities Employer, we value applications from all backgrounds, cultures and ability.


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At AtkinsRéalis, we seek to hire individuals with diverse characteristics, backgrounds and perspectives. We strongly believe that world-class talent makes no distinctions based on gender, ethnic or national origin, sexual identity and orientation, age, religion or disability, but enriches itself through these differences.  

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