senior software engineer- java jobs in London

Starling Bank in London is seeking a Full Stack Engineer (ML Ops) to join our data-focused engineering team. You will work across backend Java services and modern front-end interfaces using React/Redux, building tools that power ML-driven decisions in production.This role offers hybrid working with offices in London, and a chance to influence fintech...

The London Metal Exchange Limited is seeking a Senior Engineer to advance LMEsmart—our Inter-Office Trading platform. You will engineer resilient integrations and workflows, automate test tooling, and drive real-time performance insights across trading operations.You will work with Java (JVM), cloud environments, Kafka, and containerized deployments to...

Grid Dynamics is partnering with JUXT on a Tier 1 investment bank project to build a next-generation FX Risk Platform. You will join a team delivering FX Options end-of-day Official Valuation capabilities using Java, Kotlin and Apache Flink.You will own the development lifecycle from requirements to production, collaborating with the bank's engineers,...

United States Digital Space LLC is seeking a mid-level to senior IC to join our core engineering team. You will be responsible for implementing and maintaining our Java client library, and working alongside our core engineering team on the most performance-sensitive parts of our codebase.You will design, develop, and maintain high-performance server...

About The RoleWe are looking for an experienced Java/Kotlin Engineer to join the core engineering team delivering a major, multi-year strategic risk system replatforming programme.You will work at the heart of the programme, building key components within a highly scalable, risk-tolerant architecture designed to handle very large volumes of data in a...

Sanderson is seeking a Senior Java Engineer to work on government projects. This role requires mentoring junior engineers and collaborating with cross-functional teams to develop complex software solutions. The ideal candidate will have significant experience with Java, Spring Boot, and cloud platforms including AWS and Azure.The position offers an...

Hunter Bond seeks a Kafka Engineer/Java Developer for a FinTech client in London. The role is hybrid, focusing on building distributed, low-latency systems within a high-calibre team.You will mentor juniors and help evolve infrastructure while delivering robust, scalable software. Salary up to £130,000 plus bonus, with a supportive, innovative culture and...

Addition Solutions is seeking an experienced Backend Developer (Java/Spring Boot) for a fully remote contract. The role focuses on building scalable backend services, REST APIs and microservices in a high-volume environment. You will work with Java and Spring Boot, delivering reliable and efficient backend systems.Prior experience in iGaming, FinTech or...

TEKsystems is seeking a Senior Data Engineer with substantial Java development experience to join a fully remote team in the UK. The role involves developing data pipelines and services, working in an Azure cloud environment, and ensuring data reliability and scalability. Candidates should possess expertise in data engineering, SQL, and modern engineering...

JPMorgan Chase in London is seeking a Senior Lead Software Engineer to join an agile team and design and deliver trusted market-leading technology products in a secure, scalable way.You will build robust software across front-end and back-end stacks, mentor junior developers, conduct code reviews, and ensure high-quality production code using Java 17+ and...

IG Group in City of London is seeking a Senior Software Engineer for the Java Order Management System, owning services end-to-end and delivering low-latency order routing across the platform.You will work closely with product and business teams, design scalable Java services, and ensure correctness through rigorous testing, with production support during...

RE Partners is seeking a Senior Java Engineer to join a Deployment Security & Software Reliability team supporting a major financial institution. You will work hands-on with development teams to accelerate secure releases, modernize dependencies, and enhance software supply-chain security.The role emphasizes Java, CI/CD, containerization, and tooling to...

Wise is looking for an experienced AML Engineer to shape how we detect money laundering and terrorist financing risk. You will own large projects and their roadmaps, collaborating with engineers, data scientists, and AML experts to deliver scalable detection controls.You will mentor engineers, drive reliability and security, and align product decisions with...

JPMorgan Chase & Co. in London seeks a Senior Lead Software Engineer to design, build, and enhance data engineering solutions within the Data Platform & Strategy team of Corporate Risk Technology.You will lead high-impact engineering efforts, develop secure, scalable production code in Java, Python, or other modern languages, and collaborate with agile teams...

Grid Dynamics in London is seeking a Senior Java/Kotlin Engineer to re-engineer Prime Finance trading and post-trade systems within a live production environment. You will design, develop and deploy resilient services in Java and Kotlin, collaborating with stakeholders to modernise legacy components and deliver complex financial workflows.The role requires...

Arrows is hiring experienced Java Engineers for a major technology programme with one of the UK's leading broadcast and media organisations. You’ll join a high-performing engineering team building and scaling event-driven, cloud-native services, working with modern technologies including Java, Kafka, Kubernetes and Docker.You’ll be hands-on across the...

Smart Communications is a leading customer engagement technology provider for regulated industries. We are seeking an experienced full stack developer to extend our long‑lived enterprise product, from the Java back end to the browser, with a focus on clean, well-tested code.You will join an Agile team, own features end-to-end, and contribute to automated...

Scrumconnect Consulting in London is seeking an experienced Backend Developer to design, build, and maintain scalable, secure server-side services and APIs, while advancing Agentic AI capabilities within our engineering platform. The role sits at SFIA Level 4, working under general direction with some autonomy and mentoring of junior engineers.Our projects...

Citi London is seeking a Senior Blockchain Engineer to join the Digital Assets Platform. You will contribute to the Citi Integrated Digital Assets Platform (CIDAP), building enterprise-grade web applications with a strong Java backend and Web3 integration.The role requires hands-on development, collaboration across teams, and a proactive, startup-minded...

JPMorganChase's Accelerator team is seeking a Senior Lead Software Engineer to drive high-impact fintech products and empower teams to ship quickly.You will design scalable JVM-based systems, emphasize testability, resilience, and secure code, and collaborate across squads to turn ideas into customer-facing solutions.The role values curiosity, collaboration,...