151 to 175 of 491 Senior Software Engineer Jobs in London

looking for a Senior Software Engineer to join our team building and operating the core data platform that powers our business. This platform sits at the heart of everything we do, delivering high‐quality, real‐time market data to systems and teams across the organisation. ...

Fortinet is seeking a Senior Software Engineer to join our Cyber R&D team in the United Kingdom. You will work on the FortiDLP endpoint client software, focusing on feature development, code quality, and collaboration with cross-functional teams. We value engineers with strong programming skills ...

Senior Software Engineer - Kubernetes Control Plane/Platform as a Service (BPaaS) Location London Business Area Engineering and CTO Ref # 10052246 Description & Requirements Our team builds the platform that Bloomberg engineering teams use to deploy and run production services. BPaaS (Bloomberg Platform as a Service … operations across nearly a hundred clusters. Managing that many clusters by hand doesn't work. The solution isn't scripts and runbooks, it's software that handles it reliably. You'll design Custom Resource Definitions, implement controllers that reconcile desired state across the fleet, and write ...

invites a Senior Software Engineer to join our digital assets team. You will design, build, and secure full-stack solutions—from APIs to user interfaces—supporting treasury automation, wallet inventory, and custody integrations. You’ll own the lifecycle from development through production, collaborating with trading desks ...

leading deep-tech company is seeking a Senior Software Engineer to join their Core Services team in London. The ideal candidate will be responsible for building foundational systems for an AI-driven simulation software platform. Responsibilities include designing authentication systems, implementing access control models, and maintaining … telemetry infrastructure to ensure high observability. Candidates should have strong foundations in software engineering, expertise in Golang and Python, and a passion for engineering excellence. #J-18808-Ljbffr ...

leading investment management firm based in Greater London is seeking a Senior Software Engineer to design and build resilient systems. The ideal candidate will have 5+ years of experience in software development, particularly with cloud-distributed and event-driven architectures using C#/.NET. A background ...

Page Express Admin) and customer-facing services that render and distribute content across the Workspace ecosystem.We are looking for a highly skilled and motivated Senior Software Engineer to join Page Express team, as part of Workspace Engineering in Bucharest. Our team accelerates business innovation by crafting reusable … back-end development. We are solution engineers with simplicity, consistency and reusability in mind first, and coding second. You’ll collaborate with software & quality engineers within our squad and across the business to build impactful capabilities across the customer digital journey.What You’ll BringMust have:5+ years of professional ...

looking for a Senior Software Engineer to join our team building and operating the core data platform that powers our business. This platform sits at the heart of everything we do, delivering high-quality, real-time market data to systems and teams across the organisation. ...

Weekday's clients Min Experience: 6 years Location: London JobType: full-time We are seeking a highly skilled and experienced Senior Software Engineer with deep expertise in Python to join our growing engineering team. In this role, you will be responsible for designing, developing, and maintaining scalable … mentoring junior engineers. Key Responsibilities Design, develop, and maintain robust, scalable backend systems and APIs using Python. Lead end-to-end development of complex software solutions, from concept to deployment. Write clean, efficient, and reusable code following best practices and coding standards. Collaborate with cross-functional teams including product ...

Citibank (Switzerland) AG is seeking a Senior Software Engineer in London to join their Margin Technology team. This role involves solving engineering challenges while collaborating closely with product teams to deliver high-quality software solutions. The ideal candidate will have a Bachelor's degree in computer ...

World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more. The Role Substrate … clusters — from on-prem to the major cloud hyperscalers, whether they are internet-connected or air-gapped, small hardware footprint or large. As a Senior Software Engineer on Substrate, you will design and build Palantir’s managed Kubernetes product offerings across all these environments. You and your ...

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 ...

Holdings, LLC. is seeking a Senior Software Engineer for their Unified Platform in London. The role involves building robust systems with an emphasis on testing and scalability, designing and programming in languages such as Java, Python, and Clojure. The ideal candidate has experience with micro-service architectures ...

Wise is hiring a Senior Software Engineer in London to own large-scale backend projects for Global KYC and Onboarding. You will design robust microservices, deliver clean APIs, and build reliable systems that scale across borders, enabling faster, compliant financial services for customers worldwide. Join cross-functional ...

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 ...

Harrington Starr is seeking a Senior Software Engineer to join its team in London with hybrid working arrangements. You'll design and build critical payment infrastructure and support high-volume transactions across global markets, mentoring engineers and ensuring best practices. The ideal candidate should possess strong backend ...

it. DRW is a place of high expectations, integrity, innovation and a willingness to challenge consensus. DRW has an opening for a Senior Software Engineer focused on digital assets. The team builds and operates systems that move and safeguard cryptoassets across the firm — including treasury automation, wallet … digital asset operations and related business partners. Partnering with those teams to turn ambiguous business problems into clear technical plans and shipped software. Owning software end-to-end after it ships — we run what we build (deploy, operate, on-call); we don’t hand systems off to a separate ...

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 ...

leading cybersecurity firm is seeking a Senior Software Engineer for their Agent Endpoint DLP team in London. The role involves using your strong programming skills to implement new features and improve existing functionalities. Collaborate with cross-functional teams and contribute to code quality and secure coding practices. … Ideal candidates will have at least 3 years of software engineering experience and familiarity with various programming languages such as Go, C++, and Java. The role offers a supportive work environment focused on diversity and inclusivity. #J-18808-Ljbffr ...

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 ...

JPMorgan Chase & Co. is seeking a Senior Software Engineer for the Strategic Index Technology team. You will lead key projects within a global program, collaborating with Quantitative Research, Structuring, Trading, and Sales to deliver high-quality software for the Strategic Index desk. You will design, develop ...

Runa, based in London, is seeking a Senior Software Engineer to architect, implement and deploy services from end to end. You will write clean, scalable code to build products used by thousands of customers. You will work with Python, TypeScript and JavaScript on a modern AWS serverless ...

global information and analytics leader in Greater London is seeking a Senior Software Engineer II to focus on generative AI and platform architecture. In this role, you will lead architectural designs, develop AI services using Python, and collaborate across cross-functional teams. The ideal candidate has over … years of software engineering experience, proven leadership in platform architecture, and a strong background in Python and Kubernetes. The position promotes flexible working hours and offers a variety of benefits. #J-18808-Ljbffr ...

Ctrl Alt is searching for a Senior Software Engineer to build the future of tokenization. You will design and maintain scalable solutions while collaborating with product teams. With over 5 years of experience expected, proficiency in TypeScript or JavaScript is essential. This position offers a dynamic ...