Software Engineer - ADA

Expleo is a trusted partner for end-to-end, integrated engineering, quality services and management consulting for digital transformation. We help businesses harness unrelenting technological change to successfully deliver innovations that will help them gain a competitive advantage and improve the everyday lives of people around the globe.

We are seeking an experienced ADA Software Engineer to play a key role in the development and sustainment of mission-critical software within the Defence sector. This position offers an exciting opportunity to contribute directly to the reliability, safety, and performance of embedded software solutions that support vital defence programmes.

The successful candidate will be involved across the full software development lifecycle — from requirements analysis and design to implementation, integration, testing, and support — ensuring compliance with defined processes, industry standards, and customer expectations.

• Understand and contribute to the definition and refinement of software requirements.

• Update and maintain software design documentation in line with evolving requirements.

• Develop, modify, and maintain embedded software written in ADA.

• Test software using in-house test equipment and laboratory facilities.

• Produce and maintain test documentation to support verification and validation activities.

• Support the release of software into controlled build and deployment environments.

• Collaborate with firmware, systems, and other engineering teams to resolve system-level issues.

• Participate in system integration activities and performance analysis.

• Provide technical support and mentoring to less experienced engineers within a small team.

• Operate effectively in an Agile/SCRUM development environment, ensuring high standards of quality and accuracy.

• Degree (or equivalent experience) in Software Engineering, Computer Science, Electronics Engineering, or a related technical discipline.

• Formal training or demonstrable experience in embedded or real-time software development.

• Significant experience developing embedded software using ADA.

• Strong understanding of communication protocols, including SPI, UART, Ethernet, and PCI Express.

• Knowledge of mobile and satellite communications systems and associated protocols.

• Familiarity with model-based development using UML or tools such as IBM Rhapsody.

• Strong problem-solving skills at both system and software component level.

• Ability to work proactively within a small team and across wider multidisciplinary teams.

• Exposure to missile systems or other safety-critical defence platforms.

• Familiarity with formal verification, validation, or safety assurance practices.

• Proven background delivering full lifecycle embedded software solutions using ADA.

• Experience operating within Agile/SCRUM development frameworks.

• Hands-on experience diagnosing and resolving software and hardware integration issues.

• Experience working closely with firmware and systems engineering teams.

• Demonstrated ability to support and develop junior engineers within small, high-performing teams.

• Experience working with Real-Time Operating Systems (RTOS).
• Experience with network architectures and data communication principles
• Experience working in laboratory environments using test equipment such as oscilloscopes.
• Experience with modulation techniques used in communications systems.
• Experience performing system integration and performance analysis activities.
• Experience supporting software releases in controlled or regulated environments.

• UK National
• SC (Security Clearance) will be required for this role.

• Collaborative working environment – we stand shoulder to shoulder with our clients and our peers through good times and challenges 
• We empower all passionate technology loving professionals by allowing them to expand their skills and take part in inspiring projects 
• Expleo Academy - enables you to acquire and develop the right skills by delivering a suite of accredited training courses 
• Competitive company benefits
• Always working as one team, our people are not afraid to think big and challenge the status quo

• As a Disability Confident Committed Employer we have committed to:
• Ensure our recruitment process is inclusive and accessible
• Communicating and promoting vacancies
• Offering an interview to disabled people who meet the minimum criteria for the job
• Anticipating and providing reasonable adjustments as required
• Supporting any existing employee who acquires a disability or long term health condition, enabling them to stay in work at least one activity that will make a difference for disabled people

“We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age”. 

We treat everyone fairly and equitably across the organisation, including providing any additional support and adjustments needed for everyone to thrive