Software Senior Engineer United Kingdom Jobs

Senior Software Engineer sought by Barclays in Glasgow to design and build scalable digital services. You will leverage front-end expertise (React, Angular, TypeScript) and back-end skills (Java, Spring Boot, REST APIs) to drive innovation. Experience with microservices, event-driven architecture...

Senior Software Engineer sought to build core systems and infrastructure for a fast-scaling tech platform. This remote UK role offers end-to-end ownership, architectural influence, and work on products for a growing customer base. Requires 4+ years’ experience, strong Python/TypeScript, scalable ...

Senior Software Engineer (DevOps) sought for a customer-facing role in London, UK. You will design, build, and operate secure, cloud-native, AI-enabled solutions with a strong automation-first mindset. Key requirements include expertise in CI/CD, Infrastructure as Code (Terraform, Ansible), and C...

Senior Software Engineer sought by Optimizely, a MarTech leader powering digital experiences for H&M, PayPal, and Zoom. You will design scalable, cloud-based solutions using C#, .NET, and React, owning end-to-end delivery and operational excellence. Based in London, this role demands 8+ years of ...

Rapid7 seeks a Senior Software Engineer for its Belfast Labs team to build world-class security data platforms. You will develop critical capabilities like vulnerability intelligence and Project Sonar using Python, Go, or Java. The role requires expertise in Kubernetes, Terraform, and AWS service...

Senior Software Engineer sought to join a high-performing Betting division team in London, UK. You will architect and build highly distributed, real-time systems for industry-leading Sportsbook and Risk Management products. Requires expert-level OOP skills (C#, Java, Python), strong software arch...

Senior Software Engineer (AVP) sought for Margin Technology in London. Join a global team building high-quality solutions using Java, React, and Python. You will develop RESTful APIs with Spring, apply TDD, and work on complex business problems in a fast-paced environment. Benefits include 27 day...

Senior Software Engineer sought by a fast-scaling London fintech transforming FX and treasury operations. You will build high-impact, cloud-native trading systems using C#/.NET, SQL, and microservices. Ideal for engineers with 5+ years’ experience in financial technology. Join a collaborative tea...

Senior Software Engineer sought by Optimizely to build scalable CMS features and cloud-based systems in London. Requires 8+ years’ experience with C#, .NET, and React, plus strong software design fundamentals. Join a leader in MarTech, working cross-functionally on AI-powered solutions for global...

Senior Software Engineer, Embedded UI – C++ at Roku in Cambridge, UK. Join the #1 TV streaming platform to develop and optimize high-performance rendering engines and UI frameworks. Requires 5+ years in C++, embedded systems, and Linux, with experience in JavaScript/TypeScript frameworks. Enjoy f...

Senior Software Engineer, Infrastructure / Efficiency / Productivity sought by Roku in Cambridge, UK. This architect-level role drives org-wide productivity by owning AI-first automation, CI/CD pipelines, and enterprise tooling. Requires deep expertise in Git, Jenkins, Docker, and build systems (...

Senior Software Engineer, Infrastructure and Efficiency role in Manchester, UK. Drive org-wide productivity by architecting AI-first automation, CI/CD pipelines, and developer tooling at scale. Requires Staff/Principal-level experience with Git, Jenkins, Docker, and build systems. Join Roku to sh...

Senior Software Engineer sought to design secure, scalable SDKs and backend services for payment devices. Requires 5+ years’ experience, advanced C# or Java, and deep knowledge of SDLC, design patterns, and security (OWASP, PCI). Based in the UK with a remote-first culture, flexi-time, 25 days ho...

Senior Software Engineer (Digital Showroom) sought to own full-stack development in a large-scale serverless cloud environment using Node, React, Next, and GCP. You will architect microservices, champion test-driven quality, and mentor engineers while bridging communication with stakeholders. Enj...

Senior Virtual Software Modeling Engineer needed in Cambridge, UK to bring AMD’s cutting-edge SoCs to life. Develop high-performance C++ functional models, simulate next-gen hardware, and enable pre-silicon software development. Requires expertise in C/C++, x86/ARM/GPU architecture, and system mo...

Senior Software Engineer sought by Collinson, the global leader behind Priority Pass and loyalty solutions. You will design scalable, cloud-native applications using TypeScript (Node.js & React) in London. Requires 5+ years of full-stack experience, expertise in AWS, event-driven architectures, a...

Senior Python Software Engineer sought to support R&D tooling, data infrastructure, and CI/CD pipelines in Bristol, UK. Requires 7+ years Python experience, GitLab CI/CD, and Agile workflows. Key benefits include technical mentorship, code reviews, and ensuring software reliability, security, and...

Senior Software Engineer – Identity & Authentication sought for Vanguard’s London team. This hands-on full-stack role involves building cloud-based MFA and authentication platforms using NestJS and React. You will design secure APIs and infrastructure in a regulated environment. Benefits include ...

Rapid7 seeks a Senior Software Engineer for its Belfast Labs team to build world-class security data platforms. You will develop critical capabilities like vulnerability intelligence and Project Sonar using Python, Go, or Java. The role demands expertise in Kubernetes, Terraform, AWS (S3, EC2, RD...

Senior Frontend Software Engineer sought by an elite London trading firm with an unlimited tech budget. You will build high-scale, low-latency solutions using C++ 20/23, optimizing ML pipelines processing millions of data points per second. Ideal candidates have 2-15 years of C++ experience, stro...