251 to 275 of 346 Java Jobs in London

Your responsibilities: Design and develop web applications using Java (latest versions), Spring Boot, and AWS technologies. Architect and implement RESTful APIs for distributed enterprise-grade systems. Develop robust, scalable, and high-performance microservices leveraging Spring Boot and modern design patterns click apply for full job details ...

capable team delivering a cloud-native, API-driven platform that transforms global healthcare. This role is hands-on (approximately 5% of your time in Java), while also shaping engineering strategy, architecture, best practices, and technical direction across the growing technology function. Fully remote with flexible arrangements within the UK. Compensation … collaboration, and continuous improvement. Stay hands-on by architecting and delivering core systems and integrations in an agile environment, with hands-on work spanning Java, Azure, and React. Define and evolve the technical roadmap, ensuring scalability, security, and performance across the platform. Collaborate with product leadership to design and implement ...

perfect their processes and implement methodologies that help their teams to thrive locally and globally. Microservices, event driven architecture etc. Tech stack here is Java, Node, React, Azure, Microservices, Ci/CD, Scrum etc That's where you come in! As Head of Software Engineering and reporting directly into … working with all levels of business. ** A background of leading teams of Engineers writing business critical/complex solution in polyglot/opensource languages (java, Golang, Python etc) ** Manage teams capacity, estimation to ensure the team is able to provide an appropriate view of work and suggest potential completion dates. ...

with DevOps and Agile methodologies and associated toolsets and practices, including CI/CD and Jenkins. Desirable Skills/Knowledge/Experience Option 1: Java-Based Skills Java skill set. Strong foundation in Java, including OOP and functional programming (Java 8+). Familiarity with Spring Boot annotations, configuration ...

near-zero downtime. Design and implement high-throughput, low-latency systems processing millions of real-time payment events Build event-driven architectures using modern Java and reactive frameworks Work extensively with non-blocking I/O, asynchronous flows, back-pressure, and concurrency Contribute to system and API design, focusing … with architects, engineers, and client teams across Europe Operate in Agile environments (Scrum/Kanban) with a strong engineering culture Tech Stack (current & evolving): Java 17+, Spring WebFlux, Akka, Kafka, reactive streams, distributed messaging, cloud-native tooling What You Bring We’re looking for engineers who enjoy thinking in events ...

Java Developer/Software Engineer (Spring Boot AWS) London/WFH to £90k Are you a backend focussed Java technologist who enjoys building systems from scratch? You could be progressing your career at a global, prime broker that is replacing the legacy infrastructure used across capital markets with ...

Role: Lead Java Engineer - Risk & Compliance Platform Location: London (hybrid) Salary: £125,000 - £150,000 + Bonus Are you an exceptional Java engineer ready to step into a true leadership role within one of the most critical platforms in global banking? We're working with a top-tier financial institution … comfortable leading complex engineering initiatives, influencing design decisions, and mentoring other engineers within the team. You'll bring strong experience in: Core Java , with a deep understanding of multithreading and concurrency Grid Computing Cloud-native development , ideally on GCP Kubernetes and containerised environments Designing and delivering systems that operate ...

Mercator Digital is seeking a skilled Java Developer to join its growing consultancy team, supporting digital transformation projects across the public and private sectors. Youll work in collaborative agile teams, delivering high-quality, sustainable software solutions. Key Responsibilities & Requirements Strong Java development experience with a proven track record of delivering ...

Developer to join our team on a short-term contract. This role involves both front-end and back-end development, requiring strong skills in Java, Python, and API development. You will be instrumental in building and maintaining scalable, high-quality applications that deliver exceptional user experiences. … front-end and back-end components of applications. Collaborate with project teams to design and implement functional, robust applications. Write clean, scalable code using Java, Python, and other relevant technologies. Integrate user-facing elements with server-side logic and functionality. Ensure the performance, quality, and responsiveness of applications. Troubleshoot, debug ...

native future. You will be responsible for the strategic migration from on-premise data centres to AWS , shifting from Oracle to PostgreSQL , and evolving Java EE/EJB environments into modern Spring microservices. Technical Technical Requirements To succeed in this role, you will need a deep background in enterprise-scale … migrations: Java Modernisation: Extensive experience migrating legacy Java (EE/EJB) to modern versions (Spring/Java 11). Data & Cloud Transition: Proven track record of moving workloads from Oracle (PL/SQL) to PostgreSQL and migrating from physical Data Centres to AWS. Legacy OS Knowledge: Comfortable navigating environments across ...

deliver reliable APIs and data-driven solutions. Key Responsibilities Design, build, and maintain high-quality backend services and APIs Develop scalable, resilient microservices using Java and Spring Work with event-driven architectures using Kafka Build and consume RESTful APIs Write clean, testable code and support automated testing (including API mocking … with cross-functional teams to deliver secure, performant solutions Support troubleshooting, bug fixing, and performance optimisation Must-Have Skills & Experience Strong commercial experience with Java Spring Framework , including Spring Boot and Spring Data Experience with Kafka and event-driven systems PostgreSQL database experience OpenSearch/Elasticsearch Node.js Building and consuming ...

monitoring, and lifecycle controls. Develop integrations with model registries, feature stores, lineage tools, and governance systems. Write clean, well-tested, scalable code in Python, Java, SQL, and modern data/stream processing frameworks. Build high-throughput pipelines to capture metrics such as: Model performance, drift, and degradation Operational and service … Model Monitoring (IMM) teams. Contribute to integration efforts with AWS SageMaker, model pipelines, and enterprise data platforms. Use technologies such as AWS, SageMaker, Python, Java, Kafka, Open Telemetry, and cloud-native monitoring stacks. Support governance and reporting workflows with automated checks, standardised metrics, and platform tooling. Help identify gaps ...

security controls. Deep understanding of secure and resilient system design, including authentication patterns, threat modelling, performance considerations, and observability. Familiarity with Ruby, Python, or Java, and modern development practices such as CI/CD, TDD, and containerization. Experience guiding technology decisions, evaluating options, and influencing senior stakeholders. Strong understanding … modern cloud-native services and legacy enterprise platforms. Exposure to some of the following areas would be beneficial: Modern languages and frameworks including Ruby, Java, and Python AWS cloud services, Infrastructure as Code, platform as a service tooling Engineering practices such as DDD, TDD, CI/CD, automated testing ...

Lead Enterprise Architect (HealthTech, Java/Kafka Stack)UK Remote£100 - £140k + 20% Bonus, 12% Pension, PMI. Your new company I am engaged on a project to recruit a Lead Enterprise Architect to join a prominent HealthTech brand that have expanded internationally. It's a greenfield position with genuine … vision and influencing key stakeholders. Beyond this you'll understand the nuance and sensitivities of working across multiple timezones/geographies.The tech stack is Java, Kafka, modern integration patterns/event driven architecture and Cloud (Aws/Azure/GCP are fine). We need strong experience building enterprise microservice ...

client is a London Based Software house. We have exciting opportunities in Java and web application development working on Swift message routing and payments applications. You should have demonstrable experience in all or most of the following: Extensive experience in Java. Modern web application development using Java and ideally, with ...

currently working with a London-based Commodities client who are actively seeking a Senior Java Developer to work on the development of a business-critical pre-trade platform. What you'll need to succeed : Extensive Java development experience within investment banking or commodities - must have. Extensive Kafka experience. Working knowledge ...

currently working with a London-based Commodities client who are actively seeking a Senior Java Developer to work on the development of a business-critical pre-trade platform. What you'll need to succeed : Extensive Java development experience within investment banking - Must have. Extensive Kafka experience. Strong experience with data ...

management decisions, creating a global business by abstracting away from our entity structure and managing requirements across the group level. The technical stack includes Java, Spring, Apache Flink, Apache Kafka, Apache Ignite, Angular.* The candidate will report into the global inventory management development lead and will work closely with … full development lifecycle of a project, from design to deployment in production and post-release support.* The candidate is an expert in server-side java, highly concurrent programming.* The candidate should possess very strong technical skills, and be an advocate of test-driven development and delivery automation* The candidate should ...

test documentation and planning Support CI/CD pipelines and release quality What we're looking for: 4+ years' experience in QA Automation Strong Java or Kotlin skills and OOP fundamentals API testing experience (Postman, RestAssured, Swagger) UI automation with Selenium/Playwright SQL and data validation skills Familiarity with ...

Position: Senior Java Microservices AWS developer Location: London, UK (2 days a week from office) 6 months contract position The Role As Senior Java Microservices AWS developer with a strong hands-on experience, you will design and develop scalable, cloud-native web applications using Java and AWS Serverless architecture Model ...

Graduate/Junior Developer, Python, Linux, C#, Java - London (Teck stack: Graduate/Junior Developer, Python, Linux, C#, Java, .NET 10.0, C#, J2EE, Agile, TDD, BDD, Graduate/Junior Developer) Since 2006 our client's revolutionary marketing software platform has been helping businesses all over the world to attract, engage … experiences that are relevant, helpful, and personalized. Having recently launched in the UK, they looking to hire Graduate/Junior Developer (Python, Linux, C#, Java)) to become a part of their ever-growing family. They believe that individual developers are in the best position to make decisions about what should ...

Race to Zero: Senior Java Low-Latency Engineer (Fixed Income) 6 Months Contract London Hybrid Role Competitive daily rate. Our client "A premier global electronic trading powerhouse" is looking for a Java Specialist to lead a mission-critical shift in their E-Fixed Income (eFI) architecture. They aren't just … systems artist who understands that in this world, latency is the only metric that matters . The Tech Stack The Core: Low-latency Java (Mechanical Sympathy, Memory Tuning, GC Avoidance). The Connectivity: TransFICC specialization, TCP/UDP, Kernel-level optimization. The Infrastructure: AWS, Ansible, Linux Performance Tuning. The Philosophy ...

Senior Java Developer - AI first - sought by trading company based in London - Contract (OUTSIDE IR35 - Remote option available for outstanding candidates) What We're Looking For Backend Engineering Expertise 8+ years of software engineering experience with strong Java backend skills. Proven track record in modernising production systems and designing APIs ...

Senior Java Engineer (Azure) - Finance - London Daily rate: €500 - €700 (inside IR35) Duration: 12 months Hybrid: 8 days per month Start: ASAP A banking client of mine is looking for a Senior Java Engineer with Azure and Kafka experience to join the team on a freelance basis click apply ...

Senior Java Developer - AI first - sought by trading company based in London - Contract (OUTSIDE IR35 - Remote option available for outstanding candidates) What We're Looking For Backend Engineering Expertise 8+ years of software engineering experience with strong Java backend skills. Proven track record in modernising production systems and designing APIs ...