Java Developer jobs in United Kingdom

We’re building the next UK-headquartered engineering powerhouse. At Rowden, we design and integrate advanced systems and products that sense, connect, and protect data in challenging environments where quick decisions are vital. Our solutions use intelligent automation to enhance speed and efficiency and are built to be reliable and straightforward for critical operations in remote or high-pressure settings. Headquartered in Bristol (UK), we combine modern engineering methods with cutting-edge commercial technology to create adaptable, mission-critical systems. We focus on solving the tough challenges that others overlook, ensuring our customers can operate effectively in an ever-changing world.

Department: Engineering

Location: Bristol, UK

Compensation: £35,000 - £45,000 / year

• Building and refining diverse product features with a focus on user-centric design, ease of use, and operational clarity in high-pressure environments.
• Debugging complex issues such as concurrency problems, memory leaks, and system crashes to maintain system stability and robustness.
• Writing clean, maintainable code across a range of programming languages and environments, depending on the needs of each product or project.
• Developing and executing comprehensive test plans, including unit, integration, automated tests and performance tests, to validate system behaviour and resilience.
• Designing and implementing core components across multiple operating systems, including kernel modules, device drivers, memory management, and process scheduling.
• Developing system libraries and APIs that enable seamless communication between components and applications, ensuring performance and reliability.
• Using version control systems, particularly Git, to manage and track changes across collaborative codebases.
• Working within Agile frameworks, contributing to sprints, stand-ups, and iterative development cycles.

We are looking for someone who is passionate about technology and who actively invests in their technical skills and abilities. You will be constantly learning and developing in this role, but some key skills and experience you should already have include:

• Proficient in Python and Rust, with experience architecting and developing robust, maintainable software systems.
• Comfortable working across a range of platforms including Windows, Linux-based embedded systems, and cloud-hosted environments.
• Capable of writing clean, efficient, and maintainable code, applying sound software engineering principles to solve complex problems.
• Familiar with infrastructure concepts such as containerisation, orchestration, and deployment pipelines; experience with cloud platforms (e.g. AWS, Azure) is a plus.
• Skilled in using development tools, version control systems (particularly Git), and building systems to support collaborative, high-quality engineering workflows.
• Demonstrates strong analytical and problem-solving skills, with the ability to quickly grasp new technologies and adapt to evolving project requirements.
• Experience working on diverse projects, contributing to both greenfield development and enhancement of existing systems.

• Collaborative mindset, with experience working in cross-functional teams in Agile frameworks.
• Exhibits a high level of professionalism, reliability, and effective communication skills. Able to work independently with minimal supervision while also collaborating effectively, contributing to project goals, and delivering quality results within agreed timelines.

• Understands the importance of secure software design and implementation, with a proactive approach to identifying and mitigating potential risks across platforms.

• Experience in regulated sectors delivering complex networked systems, such as defense, national security, telecommunications, financial services, or automotive industries.
• Familiarity with system architecture and design patterns for scalable, resilient software systems.
• Knowledge of additional programming languages such as Go, C, C++, C#, or Kotlin.
• Experience with custom Linux distributions or embedded systems development.
• Exposure to Android development (OS or application level) with understanding of the Android SDK, application lifecycle, Android development tools and UI/UX design principles; helpful but not essential.

• Teamworking and collaboration – you’ll work closely with other engineers and developers as part of a cross-functional team. The ability to communicate well, share knowledge and challenge constructively is essential.
• Ability and desire to learn – the industry changes rapidly; you should be comfortable regularly learning new technologies, programming languages and platforms. Lack of experience in any technology should not bar involvement in projects using it.
• Adaptability, resilience, and the ability to work in a fast-paced environment.

We are committed to building a flexible, inclusive, and enabling company. We typically operate a flexible, hybrid-working model, with an average 3 days in the office each week (dependent on the role). We welcome discussing flexibility, part-time requirements and/or workplace adjustments. Rowden is a Disability Confident Committed company, and we actively encourage people with disabilities and health conditions to apply. Please let us know your requirements early on so we can help make the recruitment process easier. If you feel you don’t meet all criteria, we’d still love to hear from you.

• Mid-Senior level

• Full-time

• Engineering and Information Technology
• Industries: Technology, Information and Internet

Note: This description reflects the core responsibilities and requirements for the Software Engineer role at Rowden and may be followed by additional postings. If you are reading this, you are viewing a consolidated job description for the position.