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Senior Software Engineer - Application Engineer United Kingdom Jobs

156 Job Offers

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Senior Software Engineer
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United Kingdom , London
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Collinson
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Senior Software Engineer, Subscriptions
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Senior Software Engineer, Subscriptions – Manchester, UK. Join Roku, the #1 TV streaming platform, to develop core features for the Roku OS using C++, Embedded Linux, and ReactJS. You will design and ship high-quality software, write tests, and collaborate cross-functionally. Enjoy global wellnes...
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United Kingdom , Manchester
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Roku
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Senior Software Engineer
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United Kingdom , London
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80000.00 - 95000.00 GBP / Year
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Orbis Consultants
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Senior Software Engineer
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United Kingdom , London
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150000.00 - 160000.00 GBP / Year
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Orbis Consultants
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Senior Software Engineer
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United Kingdom , London
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Optimizely
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Senior Software Engineer, Ad Auctions
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United Kingdom , Cambridge
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Roku
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Senior Software Engineer
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Senior Software Engineer sought for a fully remote UK role with a cloud-native leader in child safety technology. You will design and build high-performance backend services using Golang and GCP, alongside frontend work with TypeScript and React. Key requirements include microservices, SQL, CI/CD...
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United Kingdom
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75000.00 - 85000.00 GBP / Year
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Premier Group
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Senior Software Engineer
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Senior Software Engineer (C++ / Algorithms) sought to build a high-performance visualization engine in the UK. This role demands strong C++ skills, deep computer science fundamentals, and a passion for solving complex algorithmic and graphical problems. Join a culture of technical excellence, foc...
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United Kingdom
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200000.00 GBP / Year
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Oho Group Ltd
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Senior Software Engineer
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Join Microsoft’s MORSE team as a Senior Software Engineer in the UK, securing Windows, Azure, and virtualization technologies for over a billion users. You’ll perform security design reviews, code reviews, and vulnerability research, building mitigations and scalable bug detection systems. Requir...
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United Kingdom , Multiple Locations
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Microsoft Corporation
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Full-Stack Senior Software Engineer, GenAI Data Products and Platform (VP)
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Join Citi as a VP Full-Stack Senior Software Engineer to build 'Citi Assist', a GenAI assistant for global employees. You’ll own end-to-end features using Python, TypeScript, and React, working with data pipelines and cloud infrastructure (OpenShift/Kubernetes). Based in London, this role offers ...
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United Kingdom , London
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Citi
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Senior Software Engineer (Kotlin)
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Senior Software Engineer (Kotlin) sought by hyperexponential, a high-growth AI startup backed by a16z. Build scalable, cloud-native data systems on AWS using Terraform and Kotlin. You will design distributed analytics infrastructure and deliver customer-facing features for a $7 trillion insurance...
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United Kingdom , London
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hyperexponential
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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 Software Engineer - Margin Technology - Assistant Vice President
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Senior Software Engineer (AVP) sought for Citi’s Margin Technology team in London. You will build high-impact financial systems using Java, React, and Python, with expertise in RESTful APIs, Spring, and TDD. Ideal candidates have investment banking experience and knowledge of AWS, Kafka, or Kuber...
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United Kingdom , London
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Citi
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Senior Software Engineer - Margin Technology
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Senior Software Engineer - Margin Technology at Citi in Belfast. Build high-impact financial systems using Java, React, and Python, with RESTful APIs and TDD. Join a global team solving complex problems at massive scale. Enjoy 27 days leave, bonus, private medical, and hybrid work.
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United Kingdom , Belfast
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Citi
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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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T2M Resourcing
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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 Software Engineer
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Senior Software Engineer sought to design and deliver scalable micro frontend architectures using React, TypeScript, and NestJS. This UK-based role focuses on building high-performing, secure applications with a DevSecOps mindset. You will mentor engineers, drive CI/CD improvements, and shape tec...
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United Kingdom
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Admiral Group Plc
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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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Kainos
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Senior Software Engineer - Cloud Infrastructure & Observability
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Senior Software Engineer sought to architect Roku’s next-gen observability platform in Cambridge, UK. You will lead multi-cloud infrastructure, scaling metrics, logs, and traces across thousands of services. Requires deep Golang, Kubernetes, and Prometheus expertise, plus experience with Istio an...
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United Kingdom , Cambridge
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Roku
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About the Senior Software Engineer - Application Engineer role

Senior Software Engineer - Application Engineer Jobs represent a pivotal and high-impact career path within the technology industry. Professionals in these roles are the architects and builders of the software applications that power modern business and consumer experiences. Unlike roles focused purely on infrastructure or systems programming, Application Engineers specialize in designing, developing, and maintaining the end-user-facing software products, whether they are web applications, mobile apps, or desktop solutions. These jobs demand a blend of deep technical expertise, strategic problem-solving, and a user-centric mindset to translate complex requirements into reliable, scalable, and performant software.

Typically, a Senior Software Engineer in application development shoulders significant responsibility across the entire software development lifecycle. Common duties include architecting robust technical solutions, writing clean and efficient code, conducting thorough code reviews, and collaborating closely with product managers, designers, and other engineers to define and refine features. They are expected to own major components or services, ensuring their long-term health through comprehensive testing, debugging, and iterative improvement. A key aspect of senior-level jobs is technical leadership: mentoring junior engineers, establishing best practices, driving architectural decisions, and fostering a culture of quality and innovation within their teams.

The skill set for these positions is both broad and deep. Proficiency in modern programming languages and frameworks is fundamental—common examples include JavaScript/TypeScript with React or Angular, Python, Java, Kotlin, Swift, or C++, depending on the application domain. Expertise in associated ecosystems, such as state management, build tools, and testing frameworks (e.g., Jest, Cypress), is standard. Senior roles require a strong grasp of software design principles, API design (REST, GraphQL), performance optimization, and security considerations. Experience with version control (Git), CI/CD pipelines, and cloud platforms (AWS, Azure, GCP) is also highly typical. Beyond technical acumen, successful candidates demonstrate excellent problem-solving abilities, proactive communication, and the capacity to navigate ambiguous requirements to deliver tangible value.

Ultimately, Senior Software Engineer - Application Engineer jobs are for seasoned professionals who thrive on turning ideas into reality. They are the driving force behind the digital products we use daily, balancing immediate feature delivery with the strategic foresight to build sustainable, adaptable systems. For those passionate about crafting exceptional user experiences and leading technical excellence, this profession offers a challenging and rewarding career at the heart of technological innovation.

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