Senior Software Systems Engineer

Company Details

In-Space Missions are world class experts who design, build and operate physical and digital space missions for global customers from our UK site.


Who are you?

As a Software Systems Engineer, you will have experience in specifying, developing, integrating and verifying software as part of complex systems. You will have strong technical knowledge and although Space sector experience is desirable, you do not need have prior knowledge of Spacecraft Systems. However, you will need to be comfortable working with other technical specialists to deliver the required software. You will either have a systems engineering background with an exposure to software, or be a software engineer who has interacted with systems engineers to deliver complex systems.

You will be an enthusiastic, self-starting individual who is happy to take responsibility for a range of activities from design and development to testing of software. You will be willing to work as part of a team, flex your priorities to support others where necessary and be comfortable in a fast-paced environment.


What will you be doing here?

As In-Space takes on increasingly complex projects, we are looking for engineers who can bridge the gap between software engineering and systems engineering. As software is an integral part of spacecraft and ground segment functionality, the specification and validation of functionality is critical to successful operations. As a successful candidate, you will be involved in having a detailed understanding of the software capabilities of our spacecraft and will be responsible for writing high-level systems requirements that can be allocated to software functions, breaking these down into low-level requirements, then be responsible for validating requirements over the development lifecycle of the mission.

The role requires experience in understanding software architecture and its relation to requirements or specifications, knowing the limits of requirements and how to evaluate gaps. An understanding of software design and an ability to write and test code will be essential in succeeding in this role.

Responsibilities will include:

  • Understanding spacecraft and ground segment software and system architectures
  • Creating work packages that will cover the software effort needed to deliver the mission
  • Creating system-level and low-level software requirements based on inputs from customers, industry regulations and engineers
  • Reviewing requirements from completeness and correctness perspectives
  • Writing tests that trace to requirements and documenting the resources needed
  • Evaluating test reports to validate mission and software requirements
  • Improving the quality of ISM software through contributions to requirement, testing and verification guidelines and procedures

You should have demonstrable experience in the following areas:

  • Working with systems requirements to improve the quality of requirements, and to derive software requirements or technical specifications
  • Writing code in at least one commonly used programming language (e.g., C, Java or Python) to meet existing requirements
  • Low-level software unit and functional testing to verify software specifications
  • High-level system testing to validate system functionality
  • Usage of requirements and testing trace matrices to understand gaps in system specifications

You will also have:

  • Excellent written and interpersonal communication skills
  • An enthusiastic and creative approach
  • An analytical and flexible approach to problem solving

Additionally, any of the following skills will be beneficial in the role:

  • An understanding of testing frameworks such as Robot
  • Knowledge and use of Requirements tools such as DOORS or Jama Connect
  • Previous experience with Test-Driven Development or Behaviour-Driven Design


About In-Space Missions

In-Space Missions (ISM) are world class experts who design, build and operate space missions for global customers from our UK site. We also offer ‘Space as a Service’ by flying customer payloads on our spacecraft and by providing customers the ability to upload digital applications to operate on our hardware. ISM was founded in 2015 and has grown to comprise approximately 70 staff. The company was acquired by BAE Systems in 2021 but continues to operate as a separate business with our offices and satellite cleanrooms located in Alton, Hampshire in the UK.


We have a close-knit and supportive team, with diversity and inclusion being a key to our success. Although we are looking to rapidly expand our team, we are passionate about maintaining our small company ethos, something which is at the heart of our culture. We welcome varying backgrounds, skills, perspectives and life experiences. Here at In-Space Missions we are embracing Hybrid Working. Wherever possible, we offer flexible working arrangements to allow us to balance our work and personal life more effectively.

What can we offer you?

  • 30 days holiday a year plus bank holidays
  • Flexible Working
  • 10% Non-Contributary Pension
  • Private medical insurance and life insurance (provided by AXA)
  • Death in Service
  • Income Protection Scheme
  • Option to join BAE Share Incentive Plan
  • A fun work environment, full of opportunities for career growth
  • Team meetups, including team-building days and office parties!
  • Access to Rewards Plus- Benefits portal offering discounts to a host of retailers


Recruitment Process

If you’ve been shortlisted for the role, our Recruitment team will reach out to schedule an initial conversation and talk you through our interview process in detail.

Additionally, if you don’t meet all of the criteria please still apply. We really enjoy meeting diverse people who might bring a fresh perspective on a problem we need to solve!

Unfortunately, we do not offer sponsorship. Only those with the permanent and unrestricted right to live and work in the UK will be considered for a position within In-Space Missions. Successful candidates for this role may be required to go through Government SC clearance.

Tagged as: engineering, aerospace, software development, systems engineering

Visit Us On LinkedinVisit Us On FacebookVisit Us On TwitterVisit Us On Youtube