1 to 25 of 82 Contract Java Jobs in London

Java Developer Contract: 12 months Rate: £600 per day (Inside IR35) Location: UK (Remote some days in London, Manchester or Leeds (adhoc) This role sits within a large-scale NHS digital transformation programme delivered via a leading consultancy partner. The programme focuses on modernising critical healthcare systems, improving access … secure, and interoperable digital services that support high-volume user interactions and integrate with multiple systems across the healthcare ecosystem. The Role As a Java Developer, you will be responsible for designing, building, and maintaining high-quality backend services within a complex, distributed system. You will work closely with product ...

Senior Java Backend Developer (Contract) Location: London (Hybrid) Rate: £850 - £900 per day (likely inside IR35) A leading global financial institution is seeking a Senior Java Backend Developer to join a high-performing engineering team, delivering scalable, data-intensive backend systems that support critical business functions. This is a hands … will be responsible for designing, developing, and enhancing backend services that underpin data processing and analytical workflows. Key responsibilities include: Developing high-performance Java-based backend services Designing and implementing scalable data processing architectures Working with large and complex datasets, ensuring performance and efficiency Contributing to system design, including microservices ...

Experienced with CI/CD pipelines and modern DevOps practices (e.g., Jenkins or similar tooling). Familiarity with Swagger/OpenAPI, Gradle, Liquibase, Kafka, Java (Spring Boot). Comfortable working in Agile environments and collaborating across multidisciplinary teams. Excellent communication skills. Nice to have: Active NPPV3 Clearance. Immediate availability. Hays ...

Senior Java Developer - Multithreading/caching - sought by leading investment bank based in London - Contract *inside IR35 - umbrella* Key Responsibilities Develop and maintain high-performance backend services for complex data processing workloads. Design scalable architectures for large-volume calculations and data pipelines. Work closely with cross-functional teams to define … joins, and large/complex datasets. Leverage AI tooling to enhance productivity in coding and system design. Required Skills & Experience 8+ years ' experience in Java backend development (Java 17+). Degree in Computer Science, Software Engineering, or related field. Strong expertise in Java + Spring Boot/Spring Data/ ...

Cosmos DB Change Data Feed (CDF) and integration and debugging of Spark with Cosmos CDF. High technical proficiency with Cosmos DB SDKs (e.g., .NET, Java, Python, Node.js) Thorough understanding of Spark distributed computing concepts. High technical proficiency in PySpark and Spark Concepts. Experience with concurrency patterns, CLR, and scalable application ...

Your responsibilities: Software Design & Maintenance: Design, develop, and maintain Complex Java and Python based applications and services using industry-standard methodologies and tools. Architect new systems or reuse existing systems that drive complex applications. Strategic Teamwork: Collaborate with Product Managers, UX team, and Software Engineers around the globe to deliver … into scalable solutions. Good command of coding standards and Strong understanding of both high level and low level software design Expertise in: o Core Java, Python o Building highly distributed, data intensive systems o Microservices, REST APIs o RDBMS (Oracle/SQL Server/Postgres) o CI/CD tools ...

experience working as a Release Manager within the Public Sector. Active SC Clearance. Own and coordinate end-to-end release cycles for AWS-hosted Java/Spring Boot services, ensuring readiness, dependency management, quality checks and stakeholder communication. Oversee deployments through CI/CD pipelines (Jenkins or similar), managing environments ...

Java Developer - multiple roles £510/day Inside IR-35 6 month contract Active SC required Remote with occasional travel to London for client meetings only - expensable We are looking for experienced fullstack Java Software Engineers to support projects across UK Government and Law Enforcement. You'll work in multidisciplinary … hands-on and focused on building high quality software using modern engineering practices. What you'll do You'll design, build and maintain Java based microservices, applying test driven development and following established engineering standards. You'll work with technologies including Java, Spring Boot, Postgres, Kafka, Docker, React and AWS. ...

multi-region environments Strong experience with Kubernetes and container orchestration at scale Proficiency in at least one programming language such as Go, Python, or Java Proven experience managing high-severity incidents and leading remediation efforts Preferred Qualifications Ideally, candidates will also have: Experience with multi-region or multi-cloud architectures ...

operated large-scale systems end-to-end, not those with superficial exposure or purely design-focused experience. Candidates must have strong experience of Java Full Stack, React, Kubernetes & Docker. Experience in building responsive, component based user interfaces using modern front end frameworks. Hands on expertise in API design and development ...

experience operating production workloads in AWS, GCP, or Azure (multi-region)* Strong Kubernetes experience in large-scale production environments* Proficiency in Go, Python, or Java for tooling and automation* Proven experience leading high-severity incidents and driving cross-team remediation* Experience designing and operating CI/CD systems with deployment ...

Deutsche Bank is a global banking business with strong roots in Germany and operations in over 70 countries. Their large but focused footprint gives an established position in Europe plus a significant presence in the ...

quality products Contribute to architecture decisions and best practices Work within cloud-based environments and modern development frameworks Required Skills & Experience Strong experience with Java and Spring Boot Working knowledge of Kotlin and/or Node.js Hands-on experience with AWS Familiarity with Amazon EKS and associated tooling Experience with ...

Required Skills & Experience Technical Expertise (Exceptional Level) 2025+ years in QE engineering, transformation, and automation leadership. Mastery of: o Playwright, Appium, Selenium, Cypress, Java o API Automation (REST Assured, Karate, Postman) o Performance (JMeter, LoadRunner) o Cloud native testing (Azure, AWS, GCP) o Test orchestration, CI/CD pipelines ...

Frameworks: Mastery of React and Redux, with extensive experience shaping robust UI architectures used in demanding trading workflows. Back-End: Strong working knowledge of Java, capable of contributing effectively to full-stack solutions when required. Industry Insight: A comprehensive understanding of the full trading lifecycle within investment banking, particularly across ...

Frameworks: Mastery of React and Redux, with extensive experience shaping robust UI architectures used in demanding trading workflows. Back-End: Strong working knowledge of Java, capable of contributing effectively to full-stack solutions when required. Industry Insight: A comprehensive understanding of the full trading lifecycle within investment banking, particularly across ...

The ability to work with data throughout its lifecycle, from collection and storage to processing and analysis. Data developers are responsible for designing, implementing and maintaining the systems and infrastructure needed to handle large volumes ...

involving suppliers, manufacturing, and distributors. Location: London, UK (Hybrid) Contract role for 6 months. Required Skills & Experience Good experience in python development on AWS ; Java skillset is also required. 10+ years of experience in AWS backend development (Node.js, Lambda, ECS, Step Functions). Strong understanding of supply chain processes ...

prototypes using technologies such as AI, immersive tech AR/VR, sensors, and cloud platforms. Key skills: GCP Cloud/Kubernetes JavaScript, Python or Java AI/ML/Generative AI UX/UI understanding Unity or 3D engines desirable 2? Agentic SDLC Platform Engineer 2 Roles Leeds Hybrid Senior ...

development and education in this area Nice-to-Haves: Experience in pair programming Proficiency in idiomatic Kotlin for application development Experience: Extensive knowledge of Java programming language (5 years+) 5+ years practical experience in test driven development AI Integration: We have an AI special interest group and are adopting ...

with other data platforms or applications. Knowledge of software development best practices, including version control, testing, and deployment. Proficiency in relevant programming languages (e.g., Java, Python, or JavaScript). Excellent problem-solving skills and attention to detail. Strong communication skills and ability to work collaboratively in a team Desirable skills ...

Conditions. Creating a cost optimised multi model journey management tool Key Skills: Knowledge of GCP Cloud architecture, development and deployment (K8s) Coding (JavaScript, Python, Java, etc.) UX/UI design AI/ML, generative design, 3D engines (e.g. Unity ...

documentation (Confluence/SharePoint) Active SC clearance (ideally used within last 6 months) DESIRABLE Event-driven architecture experience Knowledge of Kotlin and migration to Java/Python Experience with Power BI/GenAI (nice to have) AWS and/or Azure certifications TO BE CONSIDERED Please either apply via this ...

enabled workflows, we value engineers who stay aware of emerging security considerations within these modern environments. Core Technical Skills Skills Strong backend engineering with Java and/or Kotlin Experience with Micronaut or Spring Boot Proven capability building and supporting distributed systems Familiarity with React/Next.js for UI-level ...

token designs. Support internal and external audits by providing technical evidence and documentation. Develop or support custom PingFederate adapters, selectors, and token translators (Java-based) where required. Integrate PingFederate with PingAccess, API gateways, CIAM platforms, and cloud identity services. Work with DevOps teams to support automation, environment consistency, and controlled ...