201 to 225 of 407 Senior Software Engineer Jobs in the UK

Known is hiring a Senior Software Engineer to design and build full-stack Python applications, including FastAPI APIs, and to deploy containerized services on Kubernetes. You will work with PostgreSQL and Snowflake, develop ETL pipelines with Argo Workflows, and collaborate with data scientists and product managers across ...

company is hiring a Senior Software Engineer for the Product Reliability Engineering team. You will design, build, and test agentic solutions at global scale, ensuring reliability and maintaining high availability across billions of transactions. You will work in a multi-functional full stack team, collaborating with Product … Test, DevOps, and Agile squads to deliver scalable fintech software at the company’s global scale. #J-18808-Ljbffr ...

Java/Microservices/API design/LLMs/AI/Claude Code/Copilot Role: Senior Software Engineer Company: Financial Services Location: London - Hybrid 3 days per week Salary: up to £120,000 + Benefits Join a newly formed Service Modernisation & AI team driving AI-first … software development in financial services. This is a hands-on role modernising high-impact legacy services while building AI-powered engineering workflows. What You’ll Do Modernise critical legacy Java services using AI-driven analysis and refactoring Apply migration patterns (e.g. strangler fig) to deliver clean, modern APIs Ship ...

Wise is hiring a Senior Software Engineer II for its Wise for Banks team in London. You will design and lead scalable Java/Spring Boot services within a large microservices ecosystem, focusing on the architecture, scalability, and reliability of the global payments network. You will mentor ...

Contract: £500/day Inside IR35 Location: Manchester (1-2 days per week onsite) Duration: 6 month initial contract We're looking for a Senior Software Engineer to join a team delivering a major modernisation programme across a large-scale operational platform. The focus of the role … .NET Framework monolith into a cloud-native AWS architecture, building modern microservices, event-driven services and scalable APIs while improving engineering practices across the software delivery lifecycle. You'll work across both legacy and modern platforms, contributing to architecture, development, deployment and operational excellence as the platform evolves. What ...

center of everything we do. About the Team As part of our team, you’ll leverage your diverse skills to support both Software Engineers and QA Engineers, tackling the daily challenges of their roles. Your specialist knowledge will be invaluable in suggesting improvements to enhance quality and streamline workflows … ensuring we continue to exceed our customers’ expectations. As a Senior Software Engineer (SDET), you’ll be the transformational force that revolutionizes our testing approach. You’ll leverage AI and advanced analytics to identify quality gaps, architect intelligent testing solutions, and establish new standards for test effectiveness ...

seeking a Senior Software Engineer for the Core team, focusing on baskets, orders, checkout, promotions, and capacity management. You’ll shape systems, guide technical decisions, and mentor engineers in a fully remote role. You will lead cross‐team design, deliver large features, and enhance reliability, CI/ ...

Bloomberg L.P. is seeking a Senior Software Engineer with DataLayer Experience in London to drive developer experience for Bloomberg Terminal integrations. This role focuses on building ergonomic TypeScript APIs, end-to-end ownership of critical tooling, and collaboration with multiple engineering teams. You will shape the development ...

this role: Strong Salesforce Platform Expertise Solution Design & Architecture Technical Leadership & Collaboration What this role is all about: We're looking for a Senior Software Engineer (Salesforce) to play a key role in shaping and delivering exceptional digital experiences across our business. Working with modern Salesforce technologies … Services Cloud, Service Cloud and Agentforce, you'll design and develop robust solutions that support seamless customer journeys while driving technical excellence. As a senior member of the engineering team, you'll collaborate with stakeholders across the organisation, influence architectural decisions, mentor fellow engineers and help champion the adoption ...

Financial Times as one of Europe's fastest-growing companies for two consecutive years—and a UK Best Employer for 2026. As a Senior Software Engineer I at Thought Machine, you will own and deliver highly complex, end-to-end engineering work items. You will look beyond … your team, solving ambiguous problems, guiding less experienced engineers, and actively shaping our technical and product roadmaps. This is a role for an engineer who values clean, maintainable systems, embraces an egoless approach to collaboration, and is driven to deliver robust solutions to production. What You’ll Do Technical ...

Funding Circle in London is seeking a Senior Software Engineer to join our Accounts & Card team. You will lead technical delivery for high‐frequency, credit-card related products and collaborate closely with peers to solve complex problems in a fast‐paced fintech environment. You’ll work ...

About Graphcore At Graphcore, we’re building the future of AI compute. We’re a team of semiconductor, software and AI experts, with deep experience in creating the complete AI compute stack - from silicon and software to infrastructure at datacenter scale. As part of the SoftBank Group, backed … products and the future of artificial intelligence. Job Summary Applicants for this role should have strong experience designing, developing, and maintaining high-quality software systems. The role focuses on testing and validating a complex machine learning software stack, with particular emphasis on software architecture, automation, and engineering ...

Great opportunity for a Senior Software Engineer to join a private equity backed tech company in Manchester as they go through a scale-up. You'd join a product-based team within a larger engineering department and would be given the opportunity to be involved ...

supporting and growing Roku's advertising business. The mission of the Ad Engineering Team is to build this platform. We are hiring a Senior Software Engineer for the Advertising Platform to play a vital role in this mission. If you bring extensive experience building complex systems, love … evangelist for best practices across all functions – developers, QA, and infrastructure/ops Be an evangelist for platform innovation and reuse Deliver top‐quality software in a timely fashion We're Excited If You Have 10+ years of experience building large‐scale and low‐latency distributed systems Command ...

Great opportunity for a Senior Software Engineer to work for a retail company near Manchester going through a digital transformation. This role is onsite 3-4 days per week so we're looking for people who enjoy in person collaboration in a fast-paced and challenging work ...

Everfox in London is seeking a Senior Software Engineer to deliver cross-platform desktop and mobile apps. You will split time between hands-on development in C++ and delivering end-to-end software across the Hardsec product line. The role requires design/architecture strength, delivery ...

Cisco is seeking a Senior Software Engineer to join the Webex Real-time Media Engineering Group in Central London. You will contribute to core video and audio workflows, shaping Webex Meetings, Webex Calling, and Webex Contact Center in a hybrid environment. You will own features from design ...

seeking a Senior Software Engineer to advance the Realtime Context Engine and Confluent Kafka components. You will develop query execution, ensure high availability, and scale multi-tenant infrastructure powering Lightning tables and the context engine. You will collaborate with product, design and other engineering teams to integrate ...

setting, we are a distributed workforce with a number of Knowners working remotely. BUT ENOUGH ABOUT US, LET'S TALK ABOUT YOU As a Senior Software Engineer at Known, you can expect to work across various projects. You’ll join small, highly focused teams where ...

United States Digital Space LLC in London is seeking a Senior Software Engineer to help lead a technology transition and build skills at an internationally recognized tech company. You will work on the web application that powers Insights for admins and MSPs. The role emphasizes breaking down … problems, delivering end-to-end features, and collaborating with stakeholders across teams. We're looking for 5+ years of enterprise software experience and strong communication in a fast-paced environment. #J-18808-Ljbffr ...

accept applications from those based in the UK or who have sponsorship to live and work in the UK. #LI-Hybrid Role Summary Senior Software Engineer on our team will help lead a technological transition while building skills at an internationally recognized tech company. The role involves … legal standards. Support and promote an inclusive workplace welcoming diverse talents. Required Skills and Experience Minimum of 5 years of experience developing enterprise‐grade software with an understanding of testing and quality assurance processes. Minimum of 5 years of demonstrated experience in the current programming language and tools required ...

Jamf in London is seeking a Senior Software Engineer to contribute to the Jamf Insights web application, with a hybrid work model in London, United Kingdom. You will lead the technology transition, develop features for admins and MSPs, and help create a streamlined Jamf Pro experience ...

Citi in London is seeking a Senior Software Engineer for Margin Technology in an Assistant Vice President role. You will design and implement scalable services, collaborate with product teams and users, and contribute to a high-performance engineering culture in a hybrid work model. The role requires ...

Financial Times as one of Europe's fastest-growing companies for two consecutive years—and a UK Best Employer for 2026. As a Senior Software Engineer II, you operate with a wide sphere of influence. You will own complex, highly ambiguous technical challenges end-to-end, handling … actively drive our engineering and company principles by aligning with our broader codebase, architecture, objectives, and goals, while acting as a crucial link between senior leadership, external stakeholders, and engineering teams. What You’ll Do Technical Leadership Design & Build : Create solutions to highly complex problems, utilising a deep understanding ...

Identity’s OneLogin team seeks a Senior Software Engineer who owns design, build, test, deploy and operate responsibilities with a bias for action. You will shape testing strategy and automation, and contribute to AI-augmented development to maximize confidence and release safety at scale. You will work ...