Senior Software Testing Engineer

Company: Callen-Lenz

Location: Bristol

Posted: April 20th, 2026

Senior Software Testing Engineer

Vacancy Reference: CLA- 416

Position: Full-time

Location: Bristol, UK

Salary: £50,000 - £60,000

At Callen-Lenz, we are expanding the limits of what is possible. We specialise in crewed and uncrewed aircraft operations and technology and having recently received investment into the business we are going through a period of rapid growth and development and are looking for key roles to assist with these changes. Callen-Lenz offers innovative and customer-focused UAS solutions through our 4 key business strands: technical services, products, platforms and operational services. We are looking for individuals to help drive forward our expansion, placing you at forefront of UAS development in the UK.

Our Values

Why Work for Us

Based in the heart of rural Wiltshire, close to the Historic city of Salisbury you will join our rapidly growing, friendly and multi-disciplined team, working on a range of diverse and interesting projects, leading the way in this exciting field and witnessing the full lifecycle of our products. The Callen-Lenz team are passionate about what we do, and we are searching for individuals to grow with us as we expand into the aerospace industry.

Benefits

About the role

As a Senior Software Testing Engineer, you will contribute to the definition of the Software Verification Plan, test environment including test rigs, test cases and verification procedures as required to verify embedded software for avionics systems, e.g. Auto Pilot, Flight Control and Mission Systems, in compliance with DO-178C and DO-331.

Additionally, you will contribute to the set-up of the Hardware-in-the-loop test environment.

Responsibilities

Health and Safety

Skills and Experience

Qualifications

Degree in an applicable field (aerospace, automation, medical, automotive, robotics, computer science, physics, etc.).

Essential

Desirable

Personal Attributes

Callen-Lenz is an equal opportunities employer, committed to building an inclusive working environment. We welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation, or age. It is essential that the successful candidate must, by the start of their employment have permission to work in the UK. Proof of identity and eligibility to work in the UK will be required prior to commencement of employment.

Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks.

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