senior java developer jobs in London

Position: Senior Salesforce Developer Employment Type: Permanent Start: ASAP (September/October 2026) Location: London, UK (Hybrid, 2 days per week office) Language(s): English Focus on SAP is a specialist SAP and ERP Recruitment organisation offering both permanent and contract staffing solutions on a global scale. Client – Partnered with a global leader...

KX software powers the time-aware data-driven decisions that enable fast-moving companies to outpace competitors, realizing the full potential of their AI investments. The KX platform delivers transformational value by addressing data challenges related to completeness, timeliness and efficiency, ensuring companies understand change over time and can achieve...

Stanford Black Limited in London is seeking a Senior Software Engineer to join a high-performing backend team building cloud-native platforms for consumer-finance products. You’ll own significant components and influence architecture, delivering secure, resilient systems at scale.You’ll mentor engineers, collaborate across squads, and drive best...

Mastercard Inc. is seeking a Senior Software Engineer to lead the design, development, and delivery of secure, enterprise-grade software solutions. You will define requirements, guide implementation to Mastercard standards, and mentor team members across the SDLC.The role emphasizes technical leadership, solution design, and collaboration with stakeholders...

Salt Search is seeking a Senior Java Developer to design, develop and maintain cloud-native Java microservices on AWS, with a focus on security and observability. You will work closely with platform engineers, QA and product teams in a hybrid setup.This contract role in the travel sector spans 3–6 months, offering £550-£700 daily rate inside IR35, with...

Zensar in London is seeking an Experienced Java Technical Lead to steer design, development and delivery of enterprise-grade applications. The role demands strong hands-on expertise in Java technologies, solution design, and team leadership.You will work across microservices, REST APIs, and cloud platforms (Azure or AWS), while guiding architecture decisions...

Fiser Group in London is seeking a Senior Java Software Engineer to join its financial services technology team. You will design, develop and maintain high-quality Java applications within a fast-paced, business-critical environment.You will work with a skilled engineering team on scalable, reliable software, contributing to design decisions and performance...

A leading B2B SaaS technology company in London is seeking a Senior Java Engineer with expertise in Spring Boot and cloud-based systems. You'll design and scale products, mentor colleagues, and contribute to technical initiatives. The role offers a salary of up to £110,000 plus bonuses and excellent pension benefits. Join a collaborative environment where...

Crisil is seeking a Senior Software Engineer to join the Risk Services team within GlobalMarkets. The role focuses on designing scalable, distributed systems that support risk data processing, analytics and reporting workflows.The ideal candidate will have strong experience across Java and Python backends, with a solid understanding of risk data flows and...

Zühlke Engineering Vietnam LLC. is seeking a Senior Fullstack Developer to join a high-performing engineering squad in London or Manchester.You will work on backend-led services using Kotlin or Java 17+, building APIs and event-driven flows, and contribute to modern web interfaces with React and TypeScript. The role emphasizes AI-augmented engineering and...

Cisco ThousandEyes is hiring a backend engineer to design, build, and operate scalable backend services that process large data sets for network visibility. You will work on distributed, event-driven architectures using Java or Kotlin with Spring Boot, Docker, Kubernetes, and AWS.The role includes on-call rotations and a strong emphasis on reliability. Join...

ARQ is building the next generation fintech platform with a focus on fast, scalable backend systems. We are seeking a Lead Software Engineer (Java) to own the backend stack, design robust APIs, and accelerate delivery with a pragmatic approach to TDD and CI/CD.Join a world-class team in London with a hybrid work model and stock options that let you share in...

Luxoft in City of London is seeking a highly technical, hands-on Java developer to maintain and evolve backend and web applications within a trading platform. You will work with product owners and QA to deliver robust software across markets and time zones.Requirements include 8+ years of software engineering, strong Java 21, Spring Boot, REST APIs, React...

Entelect is seeking a Java Technical Lead to drive delivery across web and mobile platforms for esteemed organisations. You will combine software engineering excellence with strategic leadership to influence architecture, design decisions, and mentoring across cross-functional teams.You will engage in full SDLC, lead technical decision-making, and promote...

JPMorgan Chase & Co. is seeking a Senior Lead Software Engineer to drive the design, development, and delivery of trusted technology products in a secure and scalable manner.You will lead code construction, review peers, and guide architectural decisions across multiple tech stacks. You will influence product design, operations, and engineering culture while...

HCL Technologies Limited is seeking a senior engineer to own end-to-end, complex distributed systems—from UI through databases and data pipelines. You will design, build, and operate cloud-native microservices in Java 17/21 with Spring Boot, exposing well-versioned APIs and consuming front-ends in TypeScript.This hands-on role requires daily coding, PR...

Pulse Group partners with a major UK retailer to build a brand-new engineering capability within their Customer Fulfilment technology programme.They’re investing in an in-house platform that can integrate with multiple automation vendors, robotics systems and warehouse technologies. You’ll be a senior hands-on Java engineer owning architectural decisions...

The London Metal Exchange invites applications for a senior software engineer to advance LMEsmart, the Inter-Office Trading platform. You will engineer resilient integrations, optimize price-band governance, and surface real-time matching performance to reduce manual effort and strengthen market oversight.You will also lead automation of test tooling, deploy...

Senior Software Engineer II - Contacts Team - Java Full-time Compensation: GBP 105,000 - GBP 130,000 - yearly Wise is a global technology company, building the best way to move and manage the world’s money.Min fees. Max ease. Full speed. Whether people and businesses are sending money to another country, spending abroad, or making and receiving...

Citi's Equities Derivatives Technology department is seeking a hands-on Senior Developer to build applications supporting the Derivatives Flow, Delta One, and Exotics desks. You will lead an Agile/AI powered team, drive production‑grade solutions, and collaborate with traders and quants to modernize our technology stack.You will mentor developers, champion...