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Senior software developer United Kingdom Jobs

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Senior Software Developer
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Senior Software Developer needed for a 12-month contract in Warton (hybrid, 1–2 days on site). You’ll develop .NET (C#) desktop applications (WPF/WinForms) integrated with Oracle databases for the RAF’s critical ESS platform. Requires strong C#/.NET, VB6, and WPF/WinForms skills. Earn £34.77 PAYE...
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United Kingdom , Warton
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34.77 - 44.31 GBP / Hour
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Outsource UK
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Senior Software Development Engineer
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AMD seeks a Senior Software Development Engineer in Cambridge, UK to design Linux network device drivers for 800G+ SmartNIC adapters. You will write high-quality C code, lead complex driver development, and submit changes to the upstream Linux kernel. Requires 5+ years of experience, proven Linux...
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United Kingdom , Cambridge
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AMD
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Senior Python Backend Software Developer
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Join Xelix, a fast-growing AI scale-up, as a Senior Python Backend Developer. You will build robust, scalable solutions using Python, Django/Flask, and AWS in our London office (hybrid). We offer private medical cover, enhanced leave, and a dynamic environment focused on impact and growth.
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United Kingdom , London
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70000.00 - 95000.00 GBP / Year
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Xelix
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Senior Software Development Engineer
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Join AMD's ROCm team as a Senior Software Engineer to shape the core HIP runtime. You'll design and optimize this key GPU programming environment in modern C++, targeting AI and HPC workloads. This UK-based role requires deep expertise in GPU computing models and low-level systems programming.
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United Kingdom
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AMD
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Senior Software Development Engineer
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Join our Core team as a Senior Java Software Development Engineer. You will build the distributed, low-latency engine at the heart of the Hazelcast Platform. We require strong Java proficiency, experience with complex backend systems, and deep concurrency knowledge. This UK-based role offers exce...
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United Kingdom
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Hazelcast
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Senior .Net Software Developer
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Join a leading FinTech in Birmingham as a Senior .Net Developer. Work on greenfield or brownfield projects using C#, .NET, and Azure cloud services. You will build secure APIs, apply SOLID principles, and collaborate in an Agile environment. Enjoy benefits like 25 days leave, life assurance, and ...
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United Kingdom , Birmingham
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50000.00 - 65000.00 GBP / Year
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Hunter Selection | B Corp™
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Senior Python Backend Software Developer
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Join Xelix, a fast-growing AI scale-up, as a Senior Python Backend Developer in London. You will build robust, scalable solutions using Python, Django/Flask, and AWS. Enjoy a hybrid role with great benefits, including private medical cover and a dog-friendly office. Help shape the future of finan...
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United Kingdom , London
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70000.00 - 95000.00 GBP / Year
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Xelix
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Senior Software Engineer - Developer Experience
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United Kingdom , London
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Multiverse
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Senior Software Developer in Test
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United Kingdom , London
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Ten10
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Senior Front End Software Engineer - Application Development
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United Kingdom , London
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Palantir Technologies
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Senior Software Developer
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Join Clue in Bristol as a Senior Software Developer. Leverage your expertise in C#, .NET, Azure, and modern frontend frameworks like React or Angular. You'll build scalable solutions in an agile team, actively using AI tools like GitHub Copilot to innovate. Enjoy benefits including share options,...
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United Kingdom , Bristol
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Clue Software
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Senior Software Developer
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Join our dynamic London team as a Senior Software Developer. You will design and deploy robust Java applications within a Linux/AWS environment, utilizing TDD/BDD and microservices. We seek an expert in scalable cloud solutions who thrives in collaborative innovation. Enjoy benefits like private ...
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United Kingdom , London
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58000.00 GBP / Year
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Spyrosoft
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Senior Backend Software Developer - Python/Django
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Join Xelix, a fast-growing AI scale-up, as a Senior Backend Developer. You will build robust, scalable Python/Django solutions and REST APIs in a hybrid London role. Leverage your expertise in AWS, PostgreSQL, and CI/CD to shape the future of financial automation. Enjoy great benefits, including ...
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United Kingdom , London
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70000.00 - 95000.00 GBP / Year
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Xelix
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Senior Software Developer
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Join a leading UK tech firm as a Senior Software Developer, enhancing a large-scale SIP/VoIP platform. Leverage your 5+ years of Python and SIP protocol expertise to build secure, real-time communications systems. Enjoy a hybrid role with benefits like private medical insurance and a generous hol...
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United Kingdom
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65000.00 GBP / Year
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Dynamic Search Solutions
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Senior Software Developer
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Join a leading UK tech firm as a Senior Software Developer, enhancing a large-scale SIP/VoIP platform. Leverage your 5+ years of Python and SIP protocol expertise to build secure, real-time communications systems. Enjoy a hybrid role with private medical insurance, pension, and 24 days' leave.
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United Kingdom
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65000.00 GBP / Year
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Dynamic Search Solutions
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Senior Backend Software Developer - Python/Django
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Join Xelix, a fast-growing AI fintech scale-up, as a Senior Backend Developer. You will build robust, scalable Python/Django solutions and REST APIs in a hybrid London role. We seek 4+ years of Python/Django experience with AWS and CI/CD tools. Enjoy great benefits, a dog-friendly office, and a h...
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United Kingdom , London
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70000.00 - 80000.00 GBP / Year
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Xelix
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Senior Software Developer
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Join our team as a Senior Software Developer specializing in AI/ML. You will design and deploy production-ready machine learning systems using Python, PyTorch/TensorFlow, and LLMs. This role involves building end-to-end ML pipelines, RAG applications, and computer vision/NLP solutions. We offer 3...
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United Kingdom
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Activate Group Limited
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About the Senior software developer role

Explore senior software developer jobs and discover a pivotal career at the intersection of deep technical expertise and strategic leadership. A senior software developer is far more than just an experienced coder; they are a cornerstone of the engineering team, responsible for designing robust systems, guiding technical direction, and mentoring less experienced colleagues. This role typically involves taking ownership of significant components or entire applications, ensuring they are scalable, maintainable, and aligned with business objectives.

Professionals in these roles generally shoulder a comprehensive set of responsibilities. They architect and implement complex software solutions, making critical decisions on technologies, frameworks, and design patterns. A key duty is writing high-quality, efficient, and secure code while establishing and enforcing coding standards and best practices across the team. They lead the full software development lifecycle, from requirement analysis and system design through to deployment, monitoring, and iterative enhancement. Collaboration is central, as they frequently liaise with product managers, business stakeholders, and other engineering teams to translate business needs into technical specifications. Furthermore, senior developers are expected to troubleshoot and debug intricate system issues, optimize application performance, and proactively advocate for process and technological improvements. Mentoring junior and mid-level developers, conducting code reviews, and contributing to a culture of continuous learning are also hallmarks of the position.

The typical skill set for senior software developer jobs is both broad and deep. Mastery of one or more core programming languages (such as Java, C#, Python, JavaScript, or Go) and their associated ecosystems is fundamental. Equally important is a strong grasp of software architecture principles, including microservices, domain-driven design, and API design (REST, GraphQL). Experience with modern development practices like Agile/Scrum, DevOps, CI/CD pipelines, and cloud platforms (AWS, Azure, GCP) is commonly required. Proficiency with database technologies, both relational and non-relational, and knowledge of containerization tools like Docker and Kubernetes are standard expectations. Beyond technical prowess, successful senior developers possess exceptional problem-solving abilities, effective communication skills for explaining complex concepts to diverse audiences, and strong project management capabilities to drive initiatives to completion. While requirements vary, most positions seek candidates with a bachelor’s degree in computer science or a related field (or equivalent experience) and a minimum of 5-8 years of progressive hands-on development experience, including demonstrable leadership in technical projects.

Ultimately, senior software developer jobs represent an opportunity to have an outsized impact on a company's technology and product trajectory. It is a career path for those who are passionate about building excellent software, leading by example, and driving innovation from within the engineering organization.

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