46 senior software engineer jobs found in London

End Date Sunday 02 August 2026 Salary Range We support flexible working – click here for more information on flexible working options Flexible Working Options Hybrid Working, Job Share Job Description Summary . Job Description Job Title: Senior Software Engineer – Golang Location: London Salary: £76,760 - £95,950 Hours:  Full time Working Pattern : Our work style is hybrid, which involves spending at least two days per week, or 40% of our time, at one of our office sites. Colleagues with disabilities can be supported with workplace adjustments including hybrid working expectations in line with our Flexibility Works policy.  What you’ll be doing… As a Backend Software Engineer, you’ll support the build of elegant, performant, maintainable, operable, and secure Golang microservices. You’ll help design and architect our systems, contribute to continuous improvement, and play a key role in making the engineering team the best it can...

End Date Sunday 02 August 2026 Salary Range £76,760 - £115,140 We support flexible working – click here for more information on flexible working options Flexible Working Options Hybrid Working, Job Share Job Description Summary . Job Description Job Title: Senior Software Engineer – Mobile (iOS) Location: London Salary: £76,760 - £95,950 Hours:  Full time Working Pattern : Our work style is hybrid, which involves spending at least two days per week, or 40% of our time, at one of our office sites. Colleagues with disabilities can be supported with workplace adjustments including hybrid working expectations in line with our Flexibility Works policy.  What you’ll be doing… In this role, you’ll partner with a cross-functional team to design, build and ship small, high-quality features, using strong iOS engineering skills to deliver innovative, customer-facing experiences. Along the way, you’ll sweat the details, spot opportunities to add...

As part of our global technology team, you will be working with a group of passionate engineers who build technical solutions to complex business problems. We are going through a very exciting phase of transformation in margin and collateral domains in Markets Technology, and you will be required to participate in the whole spectrum of building a software solution, closely working with product teams and users. We expect you to contribute to our vision of building a strong engineering culture within our global teams. This role is for someone who enjoys solving engineering challenges, has experience in building robust and high-quality solutions, has excellent communication skills and can manage multiple priorities simultaneously. Qualifications: Bachelor’s degree in computer science or engineering field involving software programming or systems engineering Hands-on professional software development experience Proficiency in programming in mainly Java, React...

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We...

Help shape the next generation of AI-powered products in Markets! Technology.  Join a small, high-impact engineering team in Citi Markets Technology building greenfield Generative AI products that cut across asset classes and push beyond proof-of-concept into real production value. We are looking for AI-first engineers who are excited not just by using the latest LLMs, agents, and emerging design patterns, but by applying them with strong engineering discipline, sound judgement, and a relentless focus on quality. If you want to work on ambitious problems, shape solutions from the ground up, and help define how AI is engineered in one of the most interesting environments in finance, this is the role for you. The Team: We are a fast-moving team specialising in Generative AI within Markets Technology. Our focus is on building greenfield products that span multiple markets asset classes, solving real problems with modern AI engineering approaches. We work at the...

Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact. Job Overview Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech....

Senior Software Development Engineer in Test (SDET) Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent Advance your testing career while shaping digital finance with automation The Role Capco is growing our Engineering team and we’re looking for experienced SDETs with a passion for delivering innovative solutions in financial services. If you enjoy solving complex problems, working with cloud-native technologies, and collaborating in agile teams, we’d love to hear from you. As a Senior Software Development Engineer in Test (SDET) at Capco, you’ll contribute to high-impact, client-facing projects that shape the future of financial services. You’ll work alongside talented engineers, have access to industry-leading training, and get the opportunity to grow your skills across multiple platforms. You will also get the chance to work across different domains within FS & Energy. What You’ll Do Create, drive, and build...

The Senior Software Engineer is a hands-on individual contributor responsible for designing, building, and operating mission‑critical FX market infrastructure and matching platforms using C++ and Java. The role focuses on low‑latency, high‑throughput distributed systems with strict availability, resiliency, and data integrity requirements. This role owns technical outcomes for complex components and services, influences architecture and platform evolution, and provides deep expertise across development, testing, and production support. While not a line‑management role, it carries strong expectations for technical leadership, mentoring, and collaboration across engineering, architecture, and product teams. Key Responsibilities Design, develop, and maintain C++ and Java services supporting FX matching and trading workflows. Own technical delivery for key platform components, ensuring alignment with LSEG architectural principles, performance standards, and operational...

Role Purpose We are looking for a Senior Software Engineer who will lead a product-focused engineering team, collaborating with a Product Owner, business stakeholders, and third-party partners. The position is crucial in IT Development, involving team leadership, solution delivery, and technical guidance, particularly in finance and operations systems. The ideal candidate is a technically skilled leader, passionate about mentoring engineers, driving delivery, and working hands-on with a Microsoft-based technology stack. Requirements Key Responsibilities   Lead a team of software engineers aligned to the Finance Automation team (Automation and Insights) product squad. Take ownership of technical delivery across both internal development and third-party suppliers, ensuring quality, timeliness, and alignment with business goals. Collaborate closely with business stakeholders across Finance, IT, and Operations. Ensure high standards of software design, development,...

FTSE Russell | LSEG Technology FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. Job Summary: FTSE Russell is seeking a senior software engineer to be part a dynamic team of software engineers building all distribution capabilities of our index products to the financial community worldwide. The distribution platform encompasses the set of systems delivering our indexes to the...

End Date Thursday 20 August 2026 Salary Range £76,760 - £115,140 We support flexible working – click here for more information on flexible working options Flexible Working Options Hybrid Working Job Description Summary . Job Description JOB TITLE: Backend Software Engineer SALARY: £76,760 - £95,950 LOCATION: Hybrid (London) HOURS: Full Time (35 Hours) WORKING PATTERN: Our work style is hybrid, which involves spending at least two days per week, or 40% of our time, at one of our office sites. Colleagues with disabilities can be supported with workplace adjustments including hybrid working expectations in line with our Flexibility Works policy. What you’ll be doing… As a Backend Software Engineer, you’ll build elegant, performant, maintainable, operable and secure Golang microservices that power innovative financial products and services. You’ll collaborate closely with product, engineering and business stakeholders to deliver...

Our Vision We are building a next-generation system that reimagines banking workflows for our Corporate, Commercial, and Investment Bankers. Our vision is to empower them with a revolutionary Agentic AI Platform, featuring intelligent, autonomous agents that streamline processes, uncover new opportunities, and deepen client relationships—ultimately leading to significant productivity gains and increased wallet share. We are looking for a visionary, hands-on engineering leader to build and scale the platform that will make this a reality.   The Role As the Director of Agentic Platform Engineering, you will be a player-coach responsible for the technical vision, architecture, and execution of this greenfield platform. You will join a world-class engineering team being built from the ground up, while remaining deeply technical and contributing to the core development of the platform. This is a unique opportunity to blend strategic leadership with hands-on...

The Production Engineer is a pivotal role within Citi's Technology organisation, responsible for designing, building, and operating the intelligent systems that underpin our global production environment. This is an engineering-first position at the intersection of software craftsmanship, AI-native development, and large-scale distributed systems. As part of a multi-year transformation journey, the successful candidate will help define what production engineering looks like in an era of autonomous agentsa, generative AI, and self-ahealing infrastructure. You will be expected to write production-grade code daily, design agentic workflows, and contribute meaningfully to the evolution of our AI engineering practices across Citi's India technology hub. The role requires a comprehensive understanding of multiple areas within a function and how they interact to achieve the objectives of the function. Applies in-depth understanding of the business impact of technical contributions....

At Citi, we are pioneering the future of enterprise operations through innovative technology. Our COO-Technology Engineering and Architecture capability is at the forefront, responsible for architecting best-in-class solutions, driving end-to-end transformation, and integrating cutting-edge Generative AI solutions to unlock unparalleled efficiency, automation, and risk reduction across our global operations. The Team: Innovating at Scale Our team is a dynamic hub of engineers and innovators dedicated to solving complex business challenges with intelligent solutions. We believe in building robust, scalable products that deliver tangible impact. We foster an environment of continuous learning, rapid iteration, and strong engineering practices. Here, you'll work alongside passionate experts, leverage the latest in AI, and contribute to a culture that values clean code, thoughtful design, and direct, hands-on problem-solving. We're not just adopting AI; we're building the...

Senior AI Engineer (Principal Consultant) Location: London (Hybrid) | Practice Area : Technology & Engineering | Type: Permanent Empower the next frontier of AI with Capco. Shape, build, and deliver future-ready generative systems. The Role We’re looking for a Senior AI Engineer (Senior/Principal Consultant) to join our Technology Delivery team. In this role, you’ll combine deep expertise in AI/ML engineering and software development to design, build, and deploy advanced generative AI and agentic systems for leading financial services clients. You’ll work hands-on across the full AI engineering lifecycle, from architecting intelligent multi-agent systems to deploying scalable production-grade AI applications within enterprise environments. As a senior consultant, you’ll also collaborate closely with multidisciplinary teams and client stakeholders to drive innovation, accelerate adoption, and deliver measurable business impact. What You’ll Do Architect and...

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. Citi is looking for a highly skilled and innovative Full Stack Engineer with a strong background in modern enterprise architecture and a passion for Artificial Intelligence. This role will be instrumental in designing, developing, and implementing robust, scalable, and AI-enabled solutions across our...

Job Title: Lead AI Engineer   Division: Data, Technology and Innovation   Department: AI Product Delivery   Salary:  National (Edinburgh and Leeds) ranging from £72,100 to £108,000 and London from £79,300 to £120,000 per annum (salary offered will be based on skills and experience)  This role is graded as:  Technical Specialist – Regulatory   Your external recruitment contact is  Benjamin via [email protected].   Your internal recruitment contact  is Lauren via [email protected]  Applications must be submitted through our online portal. Applications sent via social media or email will not be accepted.     About the FCA and team       We regulate financial services firms in the UK, to keep financial markets fair, thriving and effective. By joining us, you’ll play a key part in protecting consumers, driving economic growth, and shaping the future of UK finance services.   The Data, Technology and Innovation (DTI) division enables the...

Job title:    Infrastructure & Network Systems Engineer Division:    Enforcement & Market Oversight Department:    Enforcement Intelligence & Specialist Services (EISS) Team : Digital Forensics Unit Salary:   Ranging from £59,200 to £76,800 (salary offered will be based on skills and experience) - Please note that this role is 100% laboratory based in our London office This role is graded as:    Senior Associate - Regulatory Your recruitment contact is  Riley Fox at [email protected] - Applications must be submitted through our online portal. Applications sent via social media or email will not be accepted.     About the FCA and team   We regulate financial services firms in the UK, to keep financial markets fair, thriving and effective. By joining us, you’ll play a key part in protecting consumers, driving economic growth, and shaping the future of UK finance services.    Enforcement & Market Oversight (EMO) is responsible for...

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 65 countries across EMEA, North America, Latin America and Asia Pacific. We employ...

Role Purpose We are seeking a highly experienced Principal Software Engineer to provide technical leadership across our technology function, driving the design, delivery, and continuous improvement of enterprise applications and digital services. This is a senior hands-on role for an individual who combines deep technical expertise with strong stakeholder management skills and a passion for engineering excellence. You will be responsible for defining architecture, establishing engineering standards, overseeing delivery, and ensuring solutions are scalable, secure, maintainable, and aligned to business objectives. Working closely with architects, engineering teams, business stakeholders, and senior leadership, you will help shape our technology strategy while mentoring engineers and promoting a culture of quality, accountability, and continuous improvement. Requirements Key Responsibilities Lead Solution Architecture & Design – Own the design and architecture of...