Senior Java Developer - Java, Kotlin, Concurrency, Kafka, RDBMS, Unix, Linux, Front Office, Multi-threading Role Overview: I am seeking a Senior Java Developer to join a leading Investment Bank as part of their global front-office technology team. This is a hands-on position focused on working with a real-time, event-driven system that underpins our industry-leading platform. … components, ensuring the platform can scale to meet the growing demands of business event processing and data management. Key Responsibilities: Develop, implement, and maintain highly performant, secure, and scalable Java applications. Java Server Side Concurrent Programming with Spring Boot (Core Spring) Leverage Kafka or other message queue systems to handle asynchronous processing. Design, optimize, and maintain MongoDB (NoSQL) database schemas. … JUnit and other relevant frameworks. Take full ownership of feature development from design through to production deployment. Collaborate effectively with cross-functional teams, balancing independence and teamwork. Key Skills: Java Kotlin Concurrency Message-driven architectures - Kafka, MQ SQL Queries Unix/Linux scripting Multithreading This is a full time role offering a salary of up to £130k. You will be More ❯
slough, south east england, united kingdom Hybrid / WFH Options
Stott and May
Job Title: Java Developer Location: London (Hybrid – 3 days in office per week) Salary: Up to £80,000 per annum About the Company: Join a leading travel company renowned for delivering exceptional customer experiences and innovative digital solutions. As part of a forward-thinking technology team, you’ll contribute to shaping the future of travel by building scalable, high-performance … applications used by millions of customers worldwide. The Role: We are looking for a skilled Java Developer to join our London-based technology team. You will work on designing, developing, and maintaining enterprise-level applications that support our digital platforms and customer-facing services. Key Responsibilities: Design, develop, and maintain high-quality Java applications and microservices. Collaborate with cross-functional … Ensure code quality through unit testing, code reviews, and adherence to best practices. Troubleshoot, debug, and optimize applications for performance and scalability. Stay up-to-date with the latest Java technologies and industry trends. Required Skills & Experience: Strong experience in Java (Java 8+) development. Solid understanding of object-oriented programming and design patterns. Experience with Spring Framework (Spring Boot, Spring More ❯
Senior Java Developer - Java, Springboot & AWS – paying up to £600/day (Inside IR35) – Hybrid (2x a week - London) – 6 month contract Our client is seeking a Senior Java Developer who is passionate about clean code, cloud-native systems, and building technology that makes a real impact. This is a unique opportunity to work in an agile, high-ownership engineering … culture. What You'll Be Doing: Build and scale backend services using Java and Spring Boot Shape a modern microservices architecture for a high-availability platform Deploy and manage services in AWS with Kubernetes (EKS) Design, implement, and own features end-to-end from discovery to production support Advocate for clean code, automated testing, and CI/CD best practices … with cross-functional teams including product, design, and infrastructure Troubleshoot complex issues and help ensure system reliability and performance What You’ll Bring: Strong backend engineering experience, especially in Java and Spring Deep understanding of distributed systems and microservices Hands-on experience with AWS , Kubernetes , Docker , and Terraform Familiarity with CI/CD pipelines and testing best practices Solid SQL More ❯
Java Software Engineer - Java, Python, AWS, MySQL, NoSql, REST APIs, Microservices, Machine Learning, Artificial intelligence (Hybrid - 3 days a week in the office - Notting Hill) Description for the Java Software Engineer role:- You will be joining a fast-growing, research-driven company building an artificial intelligence using novel machine learning techniques. My client is revolutionising their industry with a track … record of building things that others have ruled out as impossible. The Java Software engineer will join a very bright, talented team of engineers with the guidance of technologists who have help build up some of the best known technology companies today. You will have a great opportunity to work with a variety of languages, frameworks and tools. Applicants will … need a background in Java and/or Python with a focus on Server side technologies. Core skills for the Java Software Engineer: 5yrs in a commercial Development role Solid experience of Java Good knowledge of Cloud Technologies (AWS) and Microservices Strong database knowledge (SQL and NoSQL) Degree in Computer Science, Engineering, or a related field, or equivalent hands-on More ❯
driving change, code efficiency and enhancing functionality - confidently challenging and driving projects towards the customers' mission. The technology experience you bring will likely cover a couple of the following: Java Microservices - Spring boot Javascript/React/Node/Typescript Python C++/Rust Kubernetes/Openshift/Docker AWS IaC - Terraform Agile What's in it for you?: 💰 Salary More ❯
technical expertise, collaborative mindset, and an ability to deliver innovative solutions that align with business objectives. Experience Requirements Software Development & Principles Programming Languages: Proficiency in one or more of: Java, Spring Boot, Python, JavaScript, TypeScript, ReactJS SOLID Principles: Familiarity with object-oriented and clean coding practices Testing & BDD Unit Testing Frameworks: Experience with Cypress, Cucumber, Behave, Selenium, or similar tools More ❯
approaches to observability, SRE, and DevSecOps in production systems Act as a trusted point of contact for both internal and client-facing technical discussions Key Skills & Experience Proficiency in Java, Python, Go, JavaScript/TypeScript Strong experience with frameworks and tools including Spring Boot, React, Node.js, Docker, Kubernetes, and Terraform Deep understanding of modern architecture patterns such as microservices, RESTful More ❯
slough, south east england, united kingdom Hybrid / WFH Options
Kite Consulting Group
dispersed engineering teams (20-30+ heads) in global banks. Experience with Microsoft-based legacy systems (.NET, C#, SQL, Azure, on-prem/cloud) and emerging technologies including Linux, Java, microservices, and containerisation (Docker, Kubernetes, Helm, Camunda). Proficiency in CI/CD pipelines (Jenkins), version control (GitHub/GitLab/BitBucket), backend/frontend frameworks (Spring Boot, Angular, React More ❯
layer. Ensure compliance with security policies and participate in audits and vulnerability remediation. Maintain accurate documentation, including topology diagrams, runbooks, and configuration baselines. Support proprietary messaging APIs using C++, Java, Python, and C# programming languages. Provide support for proprietary cache and gateways that integrate applications with the messaging service. Required Skills & Qualifications: 3+ years of experience administering Solace PubSub+ messaging More ❯
slough, south east england, united kingdom Hybrid / WFH Options
TreasurySpring
What we’re looking for... Essential skills and experience: 5+ years experience of developing complex applications using an OO language (ideally Python, but experience in C++/C#/Java/etc would also be considered) Experience working on mission-critical applications, following a robust SDLC Excellent communication and problem-solving skills; and a strong aptitude for learning Experience and More ❯
to cutting-edge technology. Collaboration: You will be part of a highly skilled, cross-functional team that value knowledge sharing, mentorship, and teamwork The Role We are seeking skilled Java developers with strong expertise in Spring Boot to design, develop, and maintain enterprise grade applications. The role involves working in an agile environment to build scalable and high performing backend … security Collaborate with key stakeholders to deliver features on time Ensure smooth integration with databases, third-poart APIs and cloud services Essential skills/knowledge/experience: Proficiency in Java (Java 8/11 or higher) Hand on experience with Spring boot, Spring MVC Experience in developing RESTful PIs and microservices Familiarity with cloud platforms and containerization tools (Docker, Kubernetes More ❯
to cutting-edge technology. Collaboration: You will be part of a highly skilled, cross-functional team that value knowledge sharing, mentorship, and teamwork The Role We are seeking skilled Java developers with strong expertise in Spring Boot to design, develop, and maintain enterprise grade applications. The role involves working in an agile environment to build scalable and high performing backend … security Collaborate with key stakeholders to deliver features on time Ensure smooth integration with databases, third-poart APIs and cloud services Essential skills/knowledge/experience: Proficiency in Java (Java 8/11 or higher) Hand on experience with Spring boot, Spring MVC Experience in developing RESTful PIs and microservices Familiarity with cloud platforms and containerization tools (Docker, Kubernetes More ❯
We're looking for a versatile engineer who enjoys learning, problem-solving, and working across multiple technologies. Experience in one or more of the following is highly desirable: Languages: Java, Python, C++, JavaScript, TypeScript Frameworks: Angular, React, Vue Cloud & DevOps: AWS, Azure, Docker, Kubernetes Other Technologies: MERN stack, Elasticsearch, Neo4J This is a great opportunity to grow your skills and More ❯
slough, south east england, united kingdom Hybrid / WFH Options
Lorien
and resolve production issues, ensuring minimal disruption to trading activities. Contribute to continuous improvement initiatives and technical innovation within the team. Key Skills & Experience: Required: Strong programming skills in Java , C# , or Python . Experience with FX trading systems , ideally in investment banking or financial services. Solid understanding of trade lifecycle , pricing , and risk management . Familiarity with FIX protocol More ❯
engineers, architects, and DevOps teams to deliver robust streaming solutions. Required: • Hands-on experience with Apache Kafka (any distribution: open-source, Confluent, Cloudera, AWS MSK, etc.) • Strong proficiency in Java, Python, or Scala • Solid understanding of event-driven architecture and data streaming patterns • Experience deploying Kafka on cloud platforms such as AWS, GCP, or Azure • Familiarity with Docker, Kubernetes, and More ❯
slough, south east england, united kingdom Hybrid / WFH Options
mkodo
for critical work, but your greatest impact will come from technical leadership, enabling teams to deliver robust, scalable, and secure services. With a strong foundation in backend technologies, including Java and Spring Boot, and event-driven systems such as Kafka, you’ll influence systems well beyond your own code, ensuring architectural integrity and high engineering standards across multiple teams. You … details, including day-to-day duties and responsibilities on our website: mkodo careers 🤩We’d love to hear from you if... You have strong backend engineering experience, ideally including Java (Java 11+) and Spring Boot. You have proven ability to design and lead backend architectures for complex systems. You are familiar with cloud environments (AWS is mandatory) and container orchestration More ❯
ARE NOT DOING SPONSORSHIP FOR THIS ROLE. A unique development opportunity to work on a Public Sector Based Large Scale programme with an innovative market leader as a Backend Java Developer. We require a Java developer with strong back end Java experience to develop new features for our portfolio of Government Clients. You will join a team that prides itself … on collaboration and engineering the best possible Java code. Must Have Skills: Experience with Java 8, Java 11, Spring Framework, Spring Boot Experience of using JEE standards such as CDI, JPA and JMS Experience of building web applications Practical Microservices development experience on cloud platforms (AWS/Azure) and understanding of microservices design patterns Experience of Domain Driven Design Practical More ❯
Reading, England, United Kingdom Hybrid / WFH Options
Mastek
ARE NOT DOING SPONSORSHIP FOR THIS ROLE. A unique development opportunity to work on a Public Sector Based Large Scale programme with an innovative market leader as a Backend Java Developer. We require a Java developer with strong back end Java experience to develop new features for our portfolio of Government Clients. You will join a team that prides itself … on collaboration and engineering the best possible Java code. Must Have Skills: Experience with Java 8, Java 11, Spring Framework, Spring Boot Experience of using JEE standards such as CDI, JPA and JMS Experience of building web applications Practical Microservices development experience on cloud platforms (AWS/Azure) and understanding of microservices design patterns Experience of Domain Driven Design Practical More ❯
ARE NOT DOING SPONSORSHIP FOR THIS ROLE. A unique development opportunity to work on a Public Sector Based Large Scale programme with an innovative market leader as a Backend Java Developer. We require a Java developer with strong back end Java experience to develop new features for our portfolio of Government Clients. You will join a team that prides itself … on collaboration and engineering the best possible Java code. Must Have Skills: Experience with Java 8, Java 11, Spring Framework, Spring Boot Experience of using JEE standards such as CDI, JPA and JMS Experience of building web applications Practical Microservices development experience on cloud platforms (AWS/Azure) and understanding of microservices design patterns Experience of Domain Driven Design Practical More ❯
slough, south east england, united kingdom Hybrid / WFH Options
Mastek
ARE NOT DOING SPONSORSHIP FOR THIS ROLE. A unique development opportunity to work on a Public Sector Based Large Scale programme with an innovative market leader as a Backend Java Developer. We require a Java developer with strong back end Java experience to develop new features for our portfolio of Government Clients. You will join a team that prides itself … on collaboration and engineering the best possible Java code. Must Have Skills: Experience with Java 8, Java 11, Spring Framework, Spring Boot Experience of using JEE standards such as CDI, JPA and JMS Experience of building web applications Practical Microservices development experience on cloud platforms (AWS/Azure) and understanding of microservices design patterns Experience of Domain Driven Design Practical More ❯
slough, south east england, united kingdom Hybrid / WFH Options
G.Digital
tackle complex technical challenges and build secure, scalable systems that really make an impact. 💻 What you’ll be doing: ✅ Designing and building mission-critical software solutions ✅ Coding in Python, Java, C++, Rust, or Go ✅ Using tools like pytest, OpenAPI, and Docker ✅ Working in Agile teams - delivering real value, fast ✅ Building on cloud platforms like AWS, Azure, or GCP ✅ Applying modern More ❯
slough, south east england, united kingdom Hybrid / WFH Options
Coforge
Senior Automation Test Engineer (Selenium Java & Python) London, UK (Hybrid work model) We are seeking a highly skilled and proactive Senior Quality Analyst with strong expertise in web and mobile application testing, automation frameworks, and API testing. The ideal candidate will have hands-on experience with Selenium (Python), Postman, SQL, and a solid understanding of quality assurance best practices. Exposure More ❯
slough, south east england, united kingdom Hybrid / WFH Options
CipherTek Recruitment
a genuine technologist’s role — building critical software that combines engineering precision, scalability, and innovation. What We’re Looking For Very strong expertise in one of C#, Python or Java , ideally with working knowledge of another. Rust very desirable Proven experience designing and developing complex, distributed, real-time systems . Deep understanding of software architecture, concurrency, performance optimisation , and system More ❯
Tools - Nx Dev/Yarn/npm · Platform - Docker/Nginx Desirable Technical Skills · Serverless · AWS/GCP – API Gateway/Lambda · Orchestration Stack – Kubernetes/Nomad · Experience with Java and Python Education & Experience Bachelor’s degree in computing, science, or engineering. At least 3 years of software development experience in a commercial environment. Track record of delivery and support More ❯