Senior Software Test Engineer jobs in Chelmsford

QA Engineer (First SDET Hire) | Social Impact Tech – Remote UK | £45K–£80K Are you scrolling through roles that all feel the same? Would you like to use your engineering skills to genuinely improve the lives of some of the most vulnerable people in the UK? We’re working with a mission-led technology company that uses data and technology to help households access the financial support they’re...

You will lead complex test projects, support and mentor junior engineers and technicians, and contribute to the development of automated test systems.

Are you passionate about cutting-edge IoT technology and hands-on systems testing? SPX Radiodetection is seeking a Senior Systems Test Engineer to join our Bristol-based multidisciplinary engineering team. This is a fantastic opportunity to play a pivotal role in testing and validating our Locator and CAT IoT platform products while shaping a world-class testing function. Why this role...

A Senior Electronics Test Engineer is sought to join an innovative engineering team in Essex, contributing to the testing, validation, and optimisation of advanced electronic modules for the global test and measurement industry. The Senior Electronics Test Engineer, Essex, will take ownership of complex testing projects, applying strong analogue and digital expertise xwwtmva to resolve technical...

Senior Software Engineer (Robotics) 🤖 London (On-site, 5 days/week) Permanent role with excellent on-site benefits We’re looking for a Senior Software Engineer to help turn our advanced robotics stack into a dependable, real-world product. This is a hands-on role where you’ll write production code, integrate subsystems, and work directly with robots in both simulation and hardware environments...

You will technically lead ATE projects from concept to deployment, mentoring junior engineers and collaborating with cross-functional teams in hardware, firmware, and manufacturing to enhance product test coverage, throughput, and diagnostic accuracy. Key Responsibilities:

About the Job This position is for a Senior Software Engineer with a minimum of 5 years of experience in backend development and a passion for building robust, scalable systems. We are looking for an engineer with a strong background in the C# .NET ecosystem, and a preference for candidates with significant experience on AWS. Are you ready for a challenge? We’re looking for a dynamic software...

You will join a cross-functional product engineering team working on the evolution and modernisation of a core SaaS platform. The focus is on building scalable, cloud-native services while improving reliability, performance, and long-term maintainability.

You will be working closely with the Machine Learning team; however, you are not required or expected to have background in Machine Learning. This is an applied role, and we are looking to hire a software engineer with experience in cloud computing and distributed systems. In this role, you will:

You should be comfortable with most of our core technologies:

You will be a key part in a community of world-class software engineers who will continuously improve, collaborate and innovate with other engineers to create market-leading products within the defence industry. What we are looking for: Understanding and knowledge of one or more of the following:

You will design and deploy robust frontend client, backend services, infrastructure automation, and cloud-native solutions by utilising your software development knowledge and your DevOps proficiency across AWS and GCP.

You will work across the stack, building robust back-end systems in TypeScript, Node. js, and PHP, and delivering high-quality front-end experiences using modern JavaScript frameworks. The role requires expertise in database design, DevOps, cryptographic data handling, and AWS cloud technologies.

Principal Software Engineer Basildon 3-Month Contract Paying up to £70p/h (Inside IR35) Please note - due to the nature of the work, you will need to hold or be eligible to obtain a high level of UK Security clearance – please only apply if suitable Key Responsibilities: - C++ software development - Development of new applications to meet user expectations and within formal constraints -...

Senior Full Stack Engineer Remote (UK) | Full time London office available for optional in person collaboration We’re looking for an experienced Senior Full Stack Engineer to join a small, highly skilled team building a next generation Financial Services Regulatory Compliance platform. This is a hands on role where you’ll work across the stack, leading frontend development with React and...

A fantastic opportunity has arisen for an Integration & Test Engineer (Lab-Based) to join a specialist engineering department supporting complex system integration and proving activities within a secure, laboratory-based environment. This role performs hands-on integration, test and proving duties and reports into a senior engineer within the wider Integration and Systems Validation...

Socode are supporting a company that designs and builds specialist electronic sensing and surveillance systems, used in defence, security, and critical infrastructure environments. Their work sits at the intersection of hardware, software, and real-world deployment, with systems designed to operate reliably in demanding conditions. They’re looking to hire a Graduate Test Engineer to support the...

🌟 We’re Hiring | Inspection & Test Technician | Capula (Part of the Dalkia Group) With a strong focus on operational technology and digital transformation, Capula has been a leader in advanced system integration for decades — optimising efficiency and delivering performance across some of the UK’s most highly regulated and challenging industrial environments. From energy and nuclear to water,...

🚀 About Webigence and Spark Travel Webigence has 25 years of experience crafting UX‑first, often highly complex software. Our engineers pair forward‑thinking agile practices with an obsession for intuitive design, shipping products that feel effortless even when the logic underneath is anything but. Alongside a handful of long‑standing third‑party clients, we’re scaling our own SaaS...

Senior Backend Engineer | Fully Remote UK | £70,000-£75,000 | Python | Django | AWS Location: Fully Remote - Candidates MUST be UK based Salary: £70,000-£75,000 + benefits Tech Stack: - Backend: Python (Django) - Frontend: React - Cloud Systems: AWS, Docker Are you a Senior Backend Engineer who enjoys taking ownership of real production systems and shaping how a platform evolves as it...