1 to 25 of 78 Contract Java Jobs in London

We're Hiring: Java Engineer - Centre of Excellence (Java/Microservices/APIs) Location: London, United Kingdom (Hybrid - Minimum 2 days onsite/week)?? Start Date: Immediate? Engagement Type: Contract - Outside IR35 , 12-month initial term (with potential for extension or permanent employment) Industry: Financial Services/Technology Consulting About the Role We are seeking a highly capable Java Engineer … focused on delivering secure, scalable, and production-grade digital solutions for the financial services sector. This is a hands-on engineering role ideal for someone with strong experience in Java , Spring Boot , microservices , and API development , who thrives in collaborative, high-accountability environments. The successful candidate will contribute to backend service design, secure API delivery, and the development of reusable … engineering assets across client engagements. Key Responsibilities Design, develop, and maintain backend services using Java and Spring Boot Build and integrate secure APIs aligned with industry standards (e.g., OAuth2, OpenID Connect) Contribute to the development of microservices architectures and distributed systems Collaborate with frontend, DevOps, and QA teams to deliver cohesive, end-to-end solutions Participate in technical design sessions More ❯

Principal FullStack Engineer - NPPV3, SC, Java, 4GL, Java Script Up to £635 per day (InsideIR35) London/Remote 12 Months My client is an instantly recognisable consultancy who require a Principle/Lead FullStack Engineer with Java, C#, Java Script and Active Security Clearance (SC), as well as Active NPPV3, to lead a team of Engineers in a critical project … for an end client.Key requirements: Principal FullStack engineer with experience leading teams of engineers on complex projects Active Security Clearance (SC) and Active NPPV3 Full stack experience in C#, Java (Spring Boot, JPA/Hibernate), Rest APIs Experience in building microservices and knowledge of SOLID principles Understanding of 4GL (fourth generation programming language) Experience in backlog refinement, preparation of user … stories and object oriented analysis and design Excellent stakeholder management skills Nice to have: Experience in Front End (Java Script or View JS) Awareness of AWS DevOps principles and orchestration tools (Docker, Terraform, Kubernetes) Knowledge of GDS standards, to provide support on technical decisions If you're interested in this role, click 'apply now' to forward an up-to-date More ❯

We're Hiring: Backend Specialist - Java/Microservices/Secure APIs Location: London, United Kingdom (Hybrid - Minimum 2 days onsite/week)?? Start Date: Immediate? Engagement Type: Contract - Outside IR35 , 12-month initial term (with potential for extension or permanent employment) Industry: Financial Services/Technology Consulting About the Role We are seeking a highly skilled Backend Engineer to join … focused on delivering secure, scalable, and production-grade digital solutions for the financial services sector. This is a hands-on engineering role ideal for someone with deep expertise in Java, Spring Boot, and secure API design , and who thrives in fast-paced, client-facing environments. The successful candidate will play a key role in shaping backend architecture, driving secure service … delivery, and contributing to engineering standards across engagements. Key Responsibilities Design and develop backend services using Java and Spring Boot Architect and implement secure APIs using OAuth2, FAPI, OpenID Connect Ensure backend services are performant, scalable, and resilient Collaborate with frontend, DevOps, and QA teams to deliver integrated solutions Participate in architecture reviews, technical design sessions, and stakeholder workshops Champion More ❯

knowledge of financial markets and trading workflows. Required - Working in a technology team with other developers. - Proficiency in one or more well-structured programming languages (eg, Python, C++, C#, Java, Rust). - Familiarity with Linux. - Strong understanding of software development best practices, including: - Writing clean, testable code. - Version control (eg, Git). - Exposure to CI/CD pipelines. - Interest in More ❯

Perl, Python or Go. Familiar with Agile ways of working. Strong communication skills Nice to have: Working knowledge of Kafka/Docker/Jenkins/Postgres/Liquibase/Java NPPV3 Clearance If interested, with relevant experience, please apply with your latest CV ASAP. # More ❯

a DevOps Engineer with proficiency in building and maintaining CI/CD pipelines Understanding of automation and orchestration scripting (Python, Bash, Ruby) Demonstrable experience with React Proficiency in Backend - Java v17+/Spring/Spring Boot Proven experience designing and implementing cloud-based architectures (AWS, Azure or GCP) Ability to implement monitoring solutions (e.g. Prometheus, Grafana) Experience implementing security best More ❯

and execution of unimpactful deployments. Maintain and support Live systems. Optimise delivery patterns. Maintain COTS (Commercial off the shelf) products integrated within Live systems. Technical skills required: C#/java, .NET Core Containerisation (Docker, Kubernetes, OpenShift) xUnit Agile working practices CI/CD tooling Scripting experience (Python, Perl, Bash, etc.) ELK (Elastic stack) JavaScript Cypress Linux experience Search engine technology More ❯

and execution of unimpactful deployments. Maintain and support Live systems. Optimise delivery patterns. Maintain COTS (Commercial off the shelf) products integrated within Live systems. Technical skills required: C#/java, .NET Core Containerisation (Docker, Kubernetes, OpenShift) xUnit Agile working practices CI/CD tooling Scripting experience (Python, Perl, Bash, etc.) ELK (Elastic stack) JavaScript Cypress Linux experience Search engine technology More ❯

Dynamics 365 Developer | London OR Birmingham OR Hook | Hybrid | 6 Months Initial Contract | Up to £650/day Inside IR35 | Omnichannel | JAVA | Our client is seeking a talented Dynamics 365 Developer to join their team and apply their knowledge and technical expertise to the delivery of Dynamics 365 and Power Platform solutions within a product-based organisation with an agile More ❯

Dynamics 365 Developer | London OR Birmingham OR Hook | Hybrid | 6 Months Initial Contract | Up to £650/day Inside IR35 | Omnichannel | JAVA | Our client is seeking a talented Dynamics 365 Developer to join their team and apply their knowledge and technical expertise to the delivery of Dynamics 365 and Power Platform solutions within a product-based organisation with an agile More ❯

solutions. Operational Excellence: Ensure performance, scalability, and cost-efficiency across GCP environments. Required Experience Proven hands-on experience with GCP development and architecture. Strong programming skills in Python (preferred), Java, or Go. Expertise in Docker, Kubernetes, and GCP services like BigQuery, Cloud Run, Vertex AI, and Pub/Sub. Solid understanding of CI/CD, Terraform, and Git-based workflows. More ❯

enthusiasm, and problem-solving ability than ticking every box. However, experience in any of the following areas would be advantageous: Software development in web technologies or OOP (e.g., Python, Java, etc.) Database tech: Oracle SQL, PostgreSQL, MongoDB Proficient with Linux/Windows command line (Bash, PowerShell) Monitoring: Grafana, Prometheus, ELK, Splunk Agile working and tooling (e.g., Jira, Confluence) Diagnosing and More ❯

SSO (Single Sign On), Elastic and Kibana. Strong communication skills Agile environment experience Nice to have: Working knowledge of Kafka/Docker/Jenkins/Postgres/Liquibase/Java NPPV3 Clearance Immediate availability If interested, with relevant experience, please apply with your latest CV ASAP. Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment More ❯

to Big Data tools such as Elasticsearch. Background in the travel industry. Knowledge of GitHub and version control best practices. Tech Stack & Tools Cloud: AWS, GCP (BigQuery) Languages: Python, Java, C# Data: SQL, JSON, XML, ElasticSearch Other: HTTP, Regular Expressions, GitHub Please send me copies of your CV if you meet the requirements More ❯

English · French is a plus but not mandatory Desired Skills: · Experience of market and/or counterparty risk · Exposure to the practical issues of data loading, validation and management · Java 8 or above development experience Carbon60, Lorien & SRG - The Impellam Group STEM Portfolio are acting as an Employment Business in relation to this vacancy. More ❯

working in Agile/DevOps environments Understanding of large-scale distributed systems and how to support them in production Exposure to programming languages such as C++ and/or Java About Us Why join us Career coaching, mentoring and access to upskilling throughout your entire FDM career Assignments with global companies and opportunities to work abroad Opportunity to re-skill More ❯

Java Developer Clearance required: Must hold SC and NPPV3 or be eligible for both Location: Croydon - onsite 2/3 days a week Job Description: What you'll bring:* Experience of Java.* Experience of Spring framework or equivalent.* Knowledge of software design patterns and when to apply them.* Excellent knowledge of development processes.* Experience of containerization using Docker or Kubernetes. More ❯

GCP welcome)? Lead containerisation efforts (OpenShift, Kubernetes)? Promote secure models like RBAC, ABAC, and ReBAC? Use SQL and data insights to shape smart technical choices What You Bring Strong Java expertise with experience in high-scale environments Deep understanding of AWS and hybrid cloud setups Hands-on container orchestration and deployment know-how Experience with policy-as-code and authentication More ❯

developers & stakeholders to understand business requirements & translate them into integration solutions. Required Skills: Good experience of: integration concepts & technologies. MuleSoft Anypoint Platform & components (Mule ESB, API Manager, CloudHub, etc.) Java programming & experience with other programming languages such as XML, JSON, SQL Agile software development methodologies. Cloud-based integration platforms such as Amazon Web Services (AWS) or Microsoft Azure. API design More ❯

there is flexibility to work from home up to 2 days a week. What we require Solid experience in Test Automation. Demonstrable recent experience using Test Complete. Experience with Java Good Microsoft Azure DevOps experience or similar will be a distinct advantage Demonstrable experience of IT project and programme support services preferably acquired within Financial Services. Experience of testing on More ❯

there is flexibility to work from home up to 2 days a week. What we require Solid experience in Test Automation. Demonstrable recent experience using Test Complete. Experience with Java Good Microsoft Azure DevOps experience or similar will be a distinct advantage Demonstrable experience of IT project and programme support services preferably acquired within Financial Services. Experience of testing on More ❯

there is flexibility to work from home up to 2 days a week. What we require Solid experience in Test Automation. Demonstrable recent experience using Test Complete. Experience with Java Good Microsoft Azure DevOps experience or similar will be a distinct advantage Demonstrable experience of IT project and programme support services preferably acquired within Financial Services. Experience of testing on More ❯

Senior Java Developer - Glasgow - Investment Banking - Data/Spring/Linux/SQL/SDLC/Equity Primary responsibilities: The developer will work within an agile squad developing within a system comprising of numerous Java services that interact via messaging to produce the product outputs in Real Time. Technologies and techniques such as highly multi-threaded Java, Sharded Mongo DB … and caching are used in the stack to provide the scale and performance that the product requires. Skills: - Core Server Side Java including Data Structures and Concurrency - Spring, Junit - Linux - Relational Databases (Sybase and/or DB2 is preferable) with ability to write SQL queries - Understanding of message-based architectures - Good Problem solving and analytical skills - Full SDLC experience and … by the applications - Knowledge and desire to use agile software development practices Skills Desired: - JMS, MQ, Kafka - MongoDB - Knowledge of a range of common Open Source libraries used in Java development - Database performance tuning (relational and document) - Python/Shell Scripting - Financial domain knowledge (eg Equities) Glasgow based - hybrid - Inside IR35 By applying to this job you are sending us More ❯

Java Developer - Full Stack (Java 21/React.js) Location: London (Hybrid - 3 days onsite) Contract: 6-Month Contract with high potential for extension (Inside IR35 via Umbrella) Day Rate: Competitive Client: Our client is a leading global financial institution with a strong presence in capital markets. They offer a stable, collaborative environment with a focus on trading, risk management, and … derivatives. The firm combines global reach with innovative technology to support its front-office operations You'll play a key role in building full-stack solutions using Java 21 and React.js, collaborating closely with traders, risk managers, and quant teams in a dynamic and fast-paced environment. What You'll Do: Build robust front-to-back trading and risk systems … using Java 21 and React.js Work across teams (Trading, Risk, Quants, DevOps) to deliver scalable solutions Focus on performance, maintainability, and reliability from day one Enhance CI/CD pipelines and development processes Support production environments (Level 3 support) What You Bring: Strong Java (streams, lambdas, concurrency) and front-end skills with React.js Deep knowledge of multithreaded, distributed systems and More ❯

Java Developer Location: London (Hybrid - 3 days in office) Contract: 6 Months with huge potential for extension (Inside IR35 via Umbrella) Day Rate: Competitive Client: Our client is a leading global financial institution with a strong presence in capital markets. They offer a stable, collaborative environment with a focus on trading, risk management, and derivatives. The firm combines global reach … with innovative technology to support its front-office operations. A global financial institution is seeking an experienced Java Developer to join its Front Office Technology team. This role focuses on developing and supporting trading, risk, and analytics platforms, using Java 21 in a fast-paced, collaborative environment. Key Responsibilities: Develop and maintain front-to-back pricing and risk solutions using … Java 21 Collaborate with Front Office, Quants, Risk, and DevOps teams Prioritise non-functional requirements such as performance, reliability, and maintainability Improve development tooling, deployment pipelines, and overall engineering processes Provide level 3 support and contribute to operational excellence Essential Skills: Strong core Java development (streams, lambdas, concurrency APIs) Deep understanding of distributed systems and multithreaded architectures Proficiency in TDD More ❯