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

15 Job Offers

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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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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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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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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 Full-Stack Software Engineer
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Join our London team as a Senior Full-Stack Engineer. Drive innovation using Go, Python, and React within a product-focused, agile environment. Enjoy a hybrid model, 27 days leave, bonus, and comprehensive benefits while revolutionizing controls management.
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United Kingdom , London
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Citi
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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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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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Yokoy
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Senior Automation Software Engineer
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Lead complex automation solutions for naval combat systems as a Senior Engineer in New Malden. Utilize your C#/PowerShell and VMware expertise to design and maintain critical deployment frameworks. This role offers technical leadership, mentorship, and the chance to shape automation strategy with...
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United Kingdom , New Malden
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37.25 GBP / Hour
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Outsource UK
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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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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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60000.00 - 120000.00 GBP / Year
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Oho Group Ltd
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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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