26 to 50 of 91 Part-Time Java Developer Jobs

Role: Application Developer Tech stack: Java, TypeScript, Endur Industry: Energy trading Day Rate: £500-600/d inside IR35 Location: London (hybrid) Contract: 6 months (strong extension potential) X4 Technology are partnered with a global energy trading company looking for a skilled Application Developer to join their … environment, contributing to the development and integration of solutions that support renewable energy trading, financial analytics, and risk management. Responsibilities of the Contract Application Developer (Java, Typescript, Endur) Develop, enhance and maintain applications using Java and TypeScript . Customise and support Endur (Openlink), including JVS and AVS … Participate in code reviews, design sessions, and continuous improvement initiatives. Ensure software quality through unit testing, automation, and documentation. Requirements of the Contract Application Developer (Java, Typescript, Endur): Proven experience in Java development (Spring Boot, REST APIs). Solid front-end experience with TypeScript and modern frameworks More ❯

Java Developer with Very Strong SQL Glasgow, UK Hybrid (2-3 days a week) Fill Time The Role • Our team is looking for an experienced Java developer for their multi-year Disclosure of Interest (DOI) program. This is a hands-on technical role based out of … effective communication skills to handle discussions with different systems that DOI is working together with. What You'll Need to Succeed • Proficient experience in Java and related technologies • Experience in using common Java frameworks and technologies, particularly Spring, Framework, Angular, Spark • Experience on web services, particularly REST • Familiar More ❯

Senior Java Developer Global Tech Giant Up to £115k 2-3x a week in Shoreditch Are you a Senior Java Developer eager to lead the charge in innovation for one of Silicon Valley’s largest tech giants? This is a rare opportunity to join a … Senior Developers to lead new squads focused on greenfield projects. They have a strong engineering culture in the London office, and as their Senior Developer, you’ll work with Java (17+), SpringBoot, Kotlin and NoSQL databases . They’ve got their own internal cloud and toolings using Prometheus … and Grafana. As their Senior Developer, you’ll be: A key advocate for best coding practice, standards, and innovation. TDD approach is key for this as you’ll be owning the end to end development of the platform Experienced in mentoring and also hands on support of your team. More ❯

Senior Java Developer Global Tech Giant Up to £115k 2-3x a week in Shoreditch Are you a Senior Java Developer eager to lead the charge in innovation for one of Silicon Valley’s largest tech giants? This is a rare opportunity to join a … Senior Developers to lead new squads focused on greenfield projects. They have a strong engineering culture in the London office, and as their Senior Developer, you’ll work with Java (17+), SpringBoot, Kotlin and NoSQL databases . They’ve got their own internal cloud and toolings using Prometheus … and Grafana. As their Senior Developer, you’ll be: A key advocate for best coding practice, standards, and innovation. TDD approach is key for this as you’ll be owning the end to end development of the platform Experienced in mentoring and also hands on support of your team. More ❯

Location: London EC2 (Office-based, 5 days pw - Monday to Friday) Salary: £70,000 – £80,000 + bonus Type: Full-time, Permanent Backend Java Developer Overview A leading FCA-regulated financial technology firm is seeking an experienced Backend Java Developer to join its growing team. This … leadership role as the team expands. Key Responsibilities Design, develop, and maintain scalable and secure trading applications Write clean, testable, and maintainable code using Java and Spring Boot Build and integrate RESTful APIs and third-party services Participate in code reviews and Agile development processes Troubleshoot production issues and … processes where applicable Key Requirements Bachelor's degree in Computer Science, Information Systems, or a related field 5–8 years of professional experience in Java development Strong expertise with Spring and Spring Boot frameworks Proficiency in SQL (PostgreSQL preferred) and ORM technologies (e.g., Hibernate) Experience with REST API development More ❯

Location: London EC2 (Office-based, 5 days pw - Monday to Friday) Salary: £70,000 – £80,000 + bonus Type: Full-time, Permanent Backend Java Developer Overview A leading FCA-regulated financial technology firm is seeking an experienced Backend Java Developer to join its growing team. This … leadership role as the team expands. Key Responsibilities Design, develop, and maintain scalable and secure trading applications Write clean, testable, and maintainable code using Java and Spring Boot Build and integrate RESTful APIs and third-party services Participate in code reviews and Agile development processes Troubleshoot production issues and … processes where applicable Key Requirements Bachelor's degree in Computer Science, Information Systems, or a related field 5–8 years of professional experience in Java development Strong expertise with Spring and Spring Boot frameworks Proficiency in SQL (PostgreSQL preferred) and ORM technologies (e.g., Hibernate) Experience with REST API development More ❯

Job Title: Core Java Developer – Ultra Low Latency Trading Systems Location: London Type: Permanent Overview: We are hiring a Core Java developer to join a high-performance trading team focused on eFX OR Crypto markets. This role requires deep technical expertise in ultra-low latency systems … Contribute to architecture and design decisions for latency-sensitive services Ensure code quality through rigorous testing, benchmarking, and profiling Required Skills & Experience: Strong Core Java expertise (JVM internals, multithreading, low-level concurrency) Demonstrable experience building systems with microsecond SLAs Prior experience in eFX or crypto trading platforms , particularly pricing More ❯

Job Title: Core Java Developer – Ultra Low Latency Trading Systems Location: London Type: Permanent Overview: We are hiring a Core Java developer to join a high-performance trading team focused on eFX OR Crypto markets. This role requires deep technical expertise in ultra-low latency systems … Contribute to architecture and design decisions for latency-sensitive services Ensure code quality through rigorous testing, benchmarking, and profiling Required Skills & Experience: Strong Core Java expertise (JVM internals, multithreading, low-level concurrency) Demonstrable experience building systems with microsecond SLAs Prior experience in eFX or crypto trading platforms , particularly pricing More ❯

Java Developer 12 Month Rolling Contract Glasgow - 3 Days on Site. Contract We are partnered with a global Tier one bank for a Java/Scala Developer to join their team in Glasgow on a 12 month rolling contract. The ideal candidate will need to have … a strong Software Development background, particularly within Java, and be familiar with building high-quality software in an Agile fashion. Responsibilities: Contribute as part of a development squad within a global fleet to deliver the foundational build of a new system and operational data store Model and migrate Securities … our technology environment, replacing multiple disparate legacy systems Experience: Knowledge of Securities Finance/Securities Lending would be a plus but not expected Strong Java programming experience SQL/relational databases (basic knowledge) Agile/DevOps: including automated testing, tooling, and DevOps tools/concepts Please apply with an More ❯

Java Developer Location: Newcastle Please note: due to the nature of the clients we partner with on this project, this role requires SC clearance, i.e. UK nationality (or citizenship or ILR/settlement status or dependent visa) and residence in the UK for a minimum of 5 years. … an unparalleled opportunity to grow and advance. • How best to develop your skills and hone your talents within an innovative technology environment. As a Java Developer, you will: • Work as part of a team to deliver features across the technical solution with your focus being on developing Java … sprint backlog refinement, sprint planning, stand-ups, sprint review and sprint retrospective. The following skills and experience are essential for this role: • Have significant Java programming experience, ideally utilizing Spring Boot to develop microservices. • Capable of working in an agile development environment, both collaboratively and individually. • Have experience applying More ❯

Role: Java Developer Job Type: Contract Location: Bournemouth, UK (5 Days to Office) JD: 10+ years exp only Exposure to Cloud technologies Proficient in coding in Java, Python and Spark Hands-on experience working with AWS stack/services Hands-on experience with Java and Spring … but not limited to - refinement of requirements, estimation & planning, platform design & implementation, test & deployment automation, and platform resiliency & support. Primary Skills Kafka, IBM MQ Java Spring Boot Big File handling Exposure to modern microservice architecture Good to have skills Microservices CI/CD AWS- S3, EKS, SQS More ❯

Role: Backend Java Spring Boot Developer Contract Duration: 12 months Work Arrangement: Hybrid - Croydon (Biweekly on-site presence) IR35 Determination: Inside Sector: Government/Public Services Interview Format: Single-stage via Microsoft Teams Security Clearance: SC/NPPV3 REQUIRED We are seeking a skilled Java Developer … as required. -Update API documentation to reflect new or modified functionality. -Present completed work for stakeholder review and approval during sprint reviews. Essential Skills -Java/Spring Boot Microservices -AWS Kubernetes -Hibernate -Debezium -Messaging systems (eg, SNS/SQS) -AWS RDS/Aurora PostgreSQL -AWS OpenSearch -Jenkins/Git More ❯

Role: Backend Java Spring Boot Developer Contract Duration: 12 months Work Arrangement: Hybrid - Croydon (Biweekly on-site presence) IR35 Determination: Inside Sector: Government/Public Services Interview Format: Single-stage via Microsoft Teams Security Clearance: SC/NPPV3 REQUIRED We are seeking a skilled Java Developer … as required. -Update API documentation to reflect new or modified functionality. -Present completed work for stakeholder review and approval during sprint reviews. Essential Skills -Java/Spring Boot Microservices -AWS Kubernetes -Hibernate -Debezium -Messaging systems (eg, SNS/SQS) -AWS RDS/Aurora PostgreSQL -AWS OpenSearch -Jenkins/Git More ❯

Senior Java Developer Are you self-motivated with an innovative mind, a passion for technology, and a good understanding of object orientated development? Apexon is a digital-first technology services firm specializing in accelerating business transformation and delivering human-centric digital experiences. We have been meeting customers wherever … Apexon now has a global presence. The ideal candidate is a self-motivated, multi-tasker, and demonstrated team-player. You will be a senior developer responsible for the development of new software products and enhancements to existing products. You should excel in working with large-scale applications and frameworks … Partnering effectively with client project teams A natural ability to mentor junior developers You’ll have: 6+ years of commercial software engineering experience in Java, Springboot, Microservices, AWS, Docker, Kubernative, Kafka. Service oriented architecture development TDD/BDD Experience working in an Agile environment Natural self-motivation with a More ❯

Java Developer – All Levels Considered (Remote/Hybrid) Remote-first, with occasional travel to Leamington Spa Are you a back-end developer who thrives on solving real problems, building scalable systems, and working with purpose? We’re recruiting on behalf of a fast-growing tech company that … s building impactful digital products in the FinTech space — and they’re looking to grow their Java engineering team. We’re open to speaking with junior through to experienced developers , provided you bring the right mindset: proactive, curious, methodical, and passionate about building clean, maintainable code. Tech Stack Java More ❯

Title: Lead Java Developer Client: Fintech Salary: Up to £135,000 + Bonus + Benefits Location: London My client is an innovative and award-winning Fintech based in London at the forefront of the eTrading space. They are after someone with a genuine passion for Java, agile … engineer at the beginning of their growth journey! The successful applicant will have the following skills and experience: Essential Skills Hands on development using Java Detail orientated developer with a passion for testing and high code quality Degree in Computer Science, Software Engineering or STEM subject A good More ❯

Java Developer Role Type: Permanent Position Office Location: Central London Hybrid Model: 3 days per week in office, 2 days remote The Role Join a dynamic cross-functional team where you'll be involved building cutting-edge software systems that power real-time financial markets. As a talented … Java Engineer, you'll help shape the technology stack that drives millions of dollars in trading volume. Key Responsibilities Design & Build : Create robust, high-performance software systems and applications for financial operations Technical Leadership : Drive architecture decisions, set coding standards, and choose platforms and tools Collaborate : Work closely with … paced financial markets Innovate : Stay ahead of the curve with modern development practices and emerging technologies Essential Skills Technical Expertise: 2 to 3 years Java development - enterprise-level experience required C++ knowledge or strong motivation to master high-performance languages Kafka/Confluent - real-time data streaming experience Agile More ❯

Senior Java Analyst Developer/Technical Consultant £600 p/d Outside IR35 Quant Capital is urgently looking for a Java Analyst Developer/Technical Consultant to join our high profile client. Our client is a global trading platform software business. Its products are used globally … functionality, and undertaking development to deliver functionalities (when required). Technical Consultants/Analyst Developers must have: 8+ years’ full-stack experience as Senior Developer around digital applications, software engineering, microservices and cloud. This could include Core Java, Spring Boot, Hibernate/JPA and UI using React, Ember More ❯

Senior Java Developer - New - (REFBJ25) Hybrid Working - £70k - Benefits - Bonus A leading provider of SaaS solutions requires a Senior Java Developer. The ideal candidate will have a strong background in software development coupled with the following: Strong (and current) experience in both Java and Springboot, ideally More ❯

Java Developer Role Type: Permanent Position Office Location: Central London Hybrid Model: 3 days per week in office, 2 days remote The Role Join a dynamic cross-functional team where you'll be involved building cutting-edge software systems that power real-time financial markets. As a talented … Java Engineer, you'll help shape the technology stack that drives millions of dollars in trading volume. Key Responsibilities Design & Build : Create robust, high-performance software systems and applications for financial operations Technical Leadership : Drive architecture decisions, set coding standards, and choose platforms and tools Collaborate : Work closely with … paced financial markets Innovate : Stay ahead of the curve with modern development practices and emerging technologies Essential Skills Technical Expertise: 2 to 3 years Java development - enterprise-level experience required C++ knowledge or strong motivation to master high-performance languages Kafka/Confluent - real-time data streaming experience Agile More ❯

on innovation, collaboration, and integrity—values we expect every team member to uphold. Role Overview We are looking for a passionate and motivated Junior Java Engineer to join our engineering team in Sheffield. You will be part of a collaborative, cross-functional team delivering high-quality payment solutions for … experienced professionals in one of the world's leading financial institutions. Key Responsibilities Software Development: Assist in the design, development, testing, and deployment of Java-based backend services and APIs that support payment platforms. Agile Delivery: Contribute to Agile ceremonies such as sprint planning, stand-ups, and retrospectives; work … Essential Skills and Qualifications Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience). Knowledge of core Java (Java 8 or later), including object-oriented design and multithreading concepts. Familiarity with frameworks such as Spring Boot , JUnit , and RESTful APIs . More ❯

About the Role: We are seeking an experienced and visionary Technical Lead with deep expertise in Java Springboot, microservices architecture, and solution design to lead the backend engineering efforts of our enterprise platforms. You’ll work closely with engineering managers, architects, mobile teams, and product stakeholders to deliver scalable … secure, and maintainable solutions. Job Description: Java Lead engineer will play a critical role in the design, development, and implementation of mission - critical applications and systems. They leverage their extensive technical expertise and leadership skills to lead complex projects, mentor junior team members and drive innovation across the organization. … someone who has clear basic fundamentals. CI/CD - Docker or Kubernetes concepts. Reactive Programming experience. Common Logging experience. Top Skills/Must Have: Java Development (Java 21/Java 17/Java 8). Micro-services Architecture - Spring/Springboot. Cloud - Azure is good to More ❯

About the Role: We are seeking an experienced and visionary Technical Lead with deep expertise in Java Springboot, microservices architecture, and solution design to lead the backend engineering efforts of our enterprise platforms. You’ll work closely with engineering managers, architects, mobile teams, and product stakeholders to deliver scalable … secure, and maintainable solutions. Job Description: Java Lead engineer will play a critical role in the design, development, and implementation of mission - critical applications and systems. They leverage their extensive technical expertise and leadership skills to lead complex projects, mentor junior team members and drive innovation across the organization. … someone who has clear basic fundamentals. CI/CD - Docker or Kubernetes concepts. Reactive Programming experience. Common Logging experience. Top Skills/Must Have: Java Development (Java 21/Java 17/Java 8). Micro-services Architecture - Spring/Springboot. Cloud - Azure is good to More ❯

Exclusive Ocho partnership- Golang/Java developers Hybrid roles (***New Cloud Security company that recently set up in NI with 16 staff hired earlier in the year ! ) We are currently seeking to appoint a number of Senior Golang AND Java Developers to the team. In this role you … with major cloud platforms (AWS, GCP, Azure) and leverages advanced technologies including Go, Kubernetes, Docker, eBPF, and more. The Role: As a Golang/Java Developer with our client, you'll play a pivotal role in developing and securing their ground breaking products. We're seeking individuals who … understanding of operating system internals, Linux networking, and file systems. 3+ years of experience in software engineering using high-level programming languages (e.g., Golang, Java, C, Python). Proficiency with cloud platforms (AWS, GCP, Azure). Experience building data-intensive systems such as databases, event systems, or messaging systems. More ❯

Sapiens UK is seeking an experienced Java Developer to join our Cardiff team. We are a global leader in intelligent insurance software solutions, and we are expanding our Cardiff team to meet new business demands. If you’re ready to take your skills to the next level with More ❯