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Senior Software Engineer United Kingdom Jobs (On-site work)

14 Job Offers

Senior Embedded Software Engineer
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Senior Embedded Software Engineer sought to develop advanced wireless communication systems in Whiteley, UK. This hands-on role combines embedded C development with FPGA design (VHDL/Xilinx) across the full product lifecycle. Ideal for engineers skilled in Linux, electronics, and test equipment, ...
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United Kingdom , Whiteley
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Not provided
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Codan Limited
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Senior Software Engineer
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Senior Software Engineer sought by a London health-tech scale-up to scale a platform used by 100k+ customers. You’ll own problems end-to-end, working across Python backend, React/TypeScript frontend, and AWS infrastructure. Ideal candidates have 5+ years experience, actively use AI in their workf...
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United Kingdom , London
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100000.00 GBP / Year
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Orbis Consultants
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Senior Software Engineer
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Join a greenfield AI startup in London redefining innovation discovery and protection. As a Senior Software Engineer, you’ll build production systems from scratch using Java, TypeScript, or Python, integrate with LLMs, and collaborate directly with founders. No legacy code or bureaucracy—just fas...
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United Kingdom , London
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120000.00 - 150000.00 GBP / Year
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Linux Recruit
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Senior Embedded Software Engineer
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Senior Embedded Software Engineer sought to architect next-gen motion control systems for robotics and industrial automation. This role demands strong C/C++, ARM, and RTOS/bare metal expertise to optimize real-time algorithms. Based in Gloucestershire, you'll join a global R&D team solving comple...
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United Kingdom , Gloucestershire
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Not provided
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T2M Resourcing
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Senior Software Engineer
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Senior Software Engineer sought in Belfast to build high-quality, scalable applications impacting global users. You will drive technical decisions, mentor junior developers, and apply best practices in security and performance. Ideal for experienced engineers proficient in full-stack development,...
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United Kingdom , Belfast
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Not provided
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Kainos
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Senior Software Engineer
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Shape the future of technology as a Senior Software Engineer in Central London. You will explore emerging tech, lead rapid prototyping, and develop secure, cloud-native solutions for unique engineering challenges. This role requires DV security clearance and offers a strong pension, dedicated dev...
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United Kingdom , Central London
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Salary
79969.00 GBP / Year
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Social Value Portal Ltd
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Senior Full-Stack Software Engineer, (Forward Deployed), GPS
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Join Scale's Global Public Sector team in London as a Senior Full-Stack Engineer. Build impactful AI applications using React, TypeScript, Python, and cloud platforms. Partner directly with clients to deploy and architect scalable, production-grade solutions.
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United Kingdom , London
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Not provided
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Scale
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Senior Backend Software Engineer
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Join a leading crypto company in London as a Senior Backend Engineer. Design and scale high-performance, event-driven systems for real-time blockchain transactions. Leverage your expertise in distributed systems and Python/C++/Java, with a move to Rust. Build impactful infrastructure in a fast-pa...
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United Kingdom , London
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Salary
150000.00 GBP / Year
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Oho Group Ltd
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Senior Software Engineer
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Join our London team as a Senior Software Engineer. Design and scale a high-performance, event-driven backend platform using modern technologies. Leverage your expertise in distributed systems and Python/C++/Java, with an opportunity to transition to Rust. Enjoy a strong engineering culture, lead...
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United Kingdom , London
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150000.00 GBP / Year
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Oho Group Ltd
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Senior Software Engineer
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United Kingdom , London
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150000.00 GBP / Year
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Orbis Consultants
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Senior Software Engineer
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Join Equinox in London as a Senior Software Engineer. Lead complex projects, design system architectures, and mentor junior developers using Java and Kafka. Enjoy a hybrid model, bonus, private healthcare, and 27 days leave.
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United Kingdom , London
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Not provided
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Citi
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Senior Software Engineer
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Join Perk as a Senior Software Engineer in Edinburgh. Develop our next-gen travel & spend platform using Python/Django and/or React. We seek an expert full-stack developer with a product mindset, passion for quality, and Agile experience. Enjoy competitive pay, equity, private healthcare, and amp...
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United Kingdom , Edinburgh
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Not provided
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Yokoy
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Senior Software Engineer
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Join a world-class cybersecurity startup in London as a Senior Software Engineer. Shape architecture and drive technical decisions for a critical, high-impact product. Requires 5+ years' experience with Python, Java, C#, Rust, or Go, and a passion for building secure, scalable systems. Enjoy comp...
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United Kingdom , London
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Salary
60000.00 - 120000.00 GBP / Year
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Oho Group Ltd
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Senior Software Engineer
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Join a world-class cybersecurity startup in London as a Senior Software Engineer. Shape architecture and drive technical decisions for a critical, high-impact product. Requires 5+ years' experience with Python, Java, C#, Rust, or Go, building scalable systems. Enjoy real ownership, competitive pa...
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United Kingdom , London
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Salary
60000.00 - 120000.00 GBP / Year
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Oho Group Ltd
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Until further notice

About the Senior Software Engineer role

Senior Software Engineer jobs represent a pivotal career stage where technical expertise converges with leadership and strategic influence. These professionals are the cornerstone of software development teams, responsible for designing, building, and maintaining complex, scalable systems that power modern businesses. Moving beyond foundational coding tasks, senior engineers architect solutions, make critical technology decisions, and mentor others, ensuring both product excellence and team growth.

Typically, individuals in these roles undertake a broad spectrum of responsibilities. They are deeply involved in the full software development lifecycle, from requirement analysis and system design to implementation, testing, deployment, and ongoing optimization. A core duty is architectural design, where they choose appropriate technologies, design patterns, and frameworks to create robust, secure, and scalable applications. This often involves building backend services, APIs (RESTful or GraphQL), and dynamic frontend interfaces. They ensure code quality through rigorous practices like code reviews, writing comprehensive tests (unit, integration), and establishing CI/CD pipelines. Furthermore, senior software engineers frequently collaborate with cross-functional partners, including product managers, designers, and DevOps specialists, to translate business needs into technical specifications and seamless user experiences.

The skill set for these jobs is both deep and wide. Proficiency in one or more core programming languages (such as Python, Java, JavaScript/TypeScript, C#, or Go) is essential, alongside expertise in relevant frameworks and libraries for both frontend (e.g., React, Angular) and backend development. A strong grasp of data structures, algorithms, and system design principles is mandatory. Experience with cloud platforms (AWS, Azure, GCP) and their services for computing, storage, and networking is increasingly standard. Knowledge of database technologies, encompassing both SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, DynamoDB) systems, is crucial. Beyond technical acumen, senior roles demand excellent problem-solving abilities to debug complex issues and optimize performance. Soft skills are equally important; effective communication to articulate technical concepts to non-technical stakeholders, project leadership, and the ability to mentor junior developers are key differentiators.

Common requirements for Senior Software Engineer jobs usually include a bachelor’s degree in computer science or a related field, although substantial equivalent experience is often acceptable. Most positions seek candidates with 5+ years of professional software development experience, demonstrating a proven track record of shipping and maintaining production systems. Employers look for individuals who exhibit end-to-end ownership of projects, a passion for continuous learning in a rapidly evolving field, and a strategic mindset focused on long-term maintainability and business impact. For those seeking to lead through technology and drive meaningful innovation, senior software engineer jobs offer a challenging and rewarding career path at the heart of the digital world.