Automation Test Software Engineer

SII UK is seeking a SOFTWARE AUTOMATION TEST ENGINEER to join our growing engineering team developing advanced validation frameworks for connected devices and intelligent digital products.

Working within a Python-based environment, you will design and build robust end-to-end automation frameworks that interact directly with physical hardware, enabling large-scale validation and quality assurance across device fleets. The role combines software engineering, test automation, infrastructure development, and systems integration, providing an opportunity to work on complex real-world products in a highly collaborative engineering environment.

The successful candidate will have strong Python development expertise and experience building automation solutions for hardware, embedded, or IoT-based systems.

• Design, develop, and maintain end-to-end test automation frameworks using Python.

• Create automation solutions that interact with and validate physical devices and hardware platforms.

• Build reusable device abstraction layers, automation libraries, and testing utilities.

• Develop scalable testbed infrastructure supporting automated execution across large device fleets.

• Design and implement frameworks that support reliable and repeatable validation in laboratory and production environments.

• Build and maintain APIs, web services, microservices, SDKs, and supporting backend services.

• Develop monitoring, reporting, logging, and diagnostic capabilities within automation platforms.

• Apply software engineering best practices including code quality standards, design patterns, modular architecture, and automated testing.

• Collaborate closely with global engineering, software development, and quality teams.

• Troubleshoot hardware, software, and automation issues across multiple environments.

• Support continuous improvement initiatives for automation efficiency, scalability, and reliability.

• Contribute to technical design reviews, architecture discussions, and process improvements.

• Share knowledge and mentor team members to support engineering excellence.

• Produce clear technical documentation and communicate effectively with stakeholders.

• Strong Python software development skills.

• Experience designing and developing automated test frameworks.

• Knowledge of hardware integration and device communication protocols.

• Experience testing physical products, embedded systems, or IoT devices.

• Strong understanding of software architecture, object-oriented design, and design patterns.

• Experience with RESTful APIs, web services, and backend system integration.

• Knowledge of automation infrastructure, test orchestration, and execution platforms.

• Experience using source control systems such as Git.

• Understanding of continuous integration and continuous delivery (CI/CD) practices.

• Experience debugging complex hardware and software interactions.

• Knowledge of Linux-based development and testing environments.

• Experience with IoT device ecosystems and connected products.

• Knowledge of networking concepts including TCP/IP, Wi-Fi, Bluetooth, and device provisioning.

• Experience with embedded software validation and hardware-in-the-loop testing.

• Familiarity with cloud platforms and distributed systems.

• Experience developing automation for camera, sensor, consumer electronics, or smart device platforms.

• Exposure to AI-assisted testing, machine learning validation, or Generative AI technologies.

• Experience with containerisation technologies such as Docker and Kubernetes.

• Bachelor's degree in Computer Science, Software Engineering, Electronics Engineering, or a related technical discipline, or equivalent industry experience.

• Commercial experience in software development using Python.

• Proven experience building and maintaining automated testing frameworks.

• Experience developing automation against physical hardware, embedded systems, or IoT devices.

• Experience delivering production-quality software solutions following software engineering best practices.

• Experience working with hardware test environments, laboratories, or device validation systems.

• Experience integrating automation solutions into CI/CD pipelines.

• Familiarity with Agile software development methodologies.

• Experience collaborating within cross-functional engineering teams.

With five strategic offices in Belfast, Chester, Farnborough, London and Oxford, we work in partnership with our customers UK-wide to deliver high-impact engineering solutions.

SII UK is a trusted Aerospace and Defence…