1 to 25 of 34 Permanent Java Software Engineer Jobs in the South East

Job Title: Java Software Engineer (Junior - Mid Level - Senior/Lead) Client: Elite Fintech Salary: £50,000 - £170,000 Base (+ Bonus) Location: London/Hybrid/Remote Options The role: My client is looking for an experienced Java Software Engineer to join their … platform that you will be crucial in developing. Our client prides itself on maintaining cutting-edge technology and a progressive work environment. As a Java Software Engineer you will be tasked with designing and developing high-performance applications from scratch, harnessing our clients dedication to upholding the … balance and reimbursement programs. Rapid career progression and exposure to diverse technologies. Responsibilities: Build and maintain robust, scalable, and low-latency backend systems using Java, ensuring the platform can handle high transaction volumes Design and implement efficient algorithms and data structures to handle large-scale data processing, ensuring low More ❯

Java Software Engineer/Developer London to £110k Are you a bright, ambitious Software Engineer with a strong knowledge of core Java and an eagerness to learn and progress your career working on complex financial trading systems? You could be joining the Investment Management … arm of a global bank. As a Java Software Engineer you will research strategies for tailoring prices and controlling the behaviour of auto-hedging, you'll write production quality Java code used for pricing and hedging FX instruments and oversee the algorithms' performance intraday, ensuring that … discipline You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patters, Algorithms You have a deep knowledge of Java including garbage collection You have a strong appreciation of low latency systems and code optimisation to ensure speed You have experience within a financial More ❯

Java Software Engineer – Asset Management Technology 💸 Up to £100,000 + bonus + benefits 📍 Hybrid – 2 days/week in Central London Join a cutting-edge, cloud-native SaaS company backed by one of the UK’s leading global asset managers as a Java Software Engineer . They’re redefining portfolio management through an open architecture platform that puts control in the hands of the user – whether for multi-asset, single-asset, or transformational investment businesses. As a Java Software Engineer , you’ll be part of a high-performing team … building distributed, low-latency systems designed for speed, scale, and resilience. 🧠 What They’re Looking For: 2+ years’ commercial experience with Java Solid grasp of multithreading, concurrency , and high-throughput system design A passion for TDD, pair programming , and continuous delivery practices Computer Science degree from a Russell Group More ❯

Software Engineer/Developer (Java 17 Kotlin AWS) London/WFH to £85k Are you a technologist Software Engineer with strong Java skills looking to progress your career, working with a modern cloud based infrastructure and a range of technology? You could be joining … a hugely successful and growing commodities trading firm that specialise in trading whiskey. As a Software Engineer you'll collaborate with the Lead Engineer on the whiskey trading platform as the company looks to scale the platform and introduce new features. There's an emphasis on code … quality; designing and developing highly complex web based trading platforms working across the full development lifecycle. The technology stack includes Java 17, Kotlin, Spring Boot and AWS amongst others; you'll be encouraged to expand your skillset using the latest technologies and choosing the best tool for the job More ❯

Java Software Engineer – Real Time Systems | £70k - £95k + 20% Bonus Location: London (hybrid 1-2 days a week) Are you a Software Engineer passionate about building cutting-edge, high-performance systems? Do you thrive in an agile, fast-paced environment where innovation and collaboration … flagship product which delivers a seamless, cost-effective solution that integrates with banking applications to power the future of payments. The Role As a Software Engineer, you will play a key role in developing asynchronous, event-driven systems that ensure speed, scalability, and resilience. You’ll work with … Java 17+, Spring WebFlux, AKKA, Kafka and more to build solutions that process millions of transactions in real time. Develop high-quality code using TDD & BDD methodologies. Contribute to architecture and design decisions for an advanced payments platform. Optimise applications for high availability and scalability. Work in a highly More ❯

Java Software Engineer BurgessHill/Hybrid 65,000 GBP - 75,000 GBP A leading global IT consultancy is seeking a Java Software Engineer to join their team. In this role, you'll focus on developing and improving features within the Setup experience domain. You … across the platform to align on best practices, share knowledge, and drive consistent development standards. Essential Skills: Strong experience with backend programming, preferably in Java or similar type-safe languages. Skilled in building microservice architectures using REST and messaging tools like Kafka or RabbitMQ. Proficient in Agile/Scrum … CI/CD pipelines. Holds a degree in Computer Science or a related field, or has equivalent hands-on experience. Solid background in professional software development practices. This is an urgent vacancy where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your More ❯

Java Software Engineer BurgessHill/Hybrid 65,000 GBP - 75,000 GBP A leading global IT consultancy is seeking a Java Software Engineer to join their team. In this role, you'll focus on developing and improving features within the Setup experience domain. You … across the platform to align on best practices, share knowledge, and drive consistent development standards. Essential Skills: Strong experience with backend programming, preferably in Java or similar type-safe languages. Skilled in building microservice architectures using REST and messaging tools like Kafka or RabbitMQ. Proficient in Agile/Scrum … CI/CD pipelines. Holds a degree in Computer Science or a related field, or has equivalent hands-on experience. Solid background in professional software development practices. This is an urgent vacancy where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your More ❯

Job Title: Senior Java Engineer - Trading Location: London Salary Up to £170,000 base + discretionary Bonus Company: Our client is a prestigious trading firm located in the heart of London. With a strong focus on multi-strategy, multi-asset trading, they have consistently excelled in the dynamic … and fast-paced world of financial markets. They are currently seeking a Senior Java Engineer to join their elite team and drive the development of mission-critical software solutions. Position Overview: As a Senior Engineer at our client's firm, you will play a pivotal role … in developing and maintaining the software that powers their high-frequency trading operations. The ideal candidate will have a proven track record of building mission-critical software systems, and preferably come from a financial or trading background. Responsibilities: Designing, development, and maintenance of high-performance, low-latency trading More ❯

Java Software Developer – Front Office | London A leading investment bank is looking for a Java Software Developer to join its cross-asset pricing and risk team in London. This is a permanent Front Office role offering deep technical challenges, regular contact with the desk, and a … on performance, scalability, and clean architecture Contribute to the re-architecture of pricing for speed and efficiency (e.g., pre-calculated sensitivities) Tech Environment Core Java (Java 17+), multithreaded – essential Python – highly desirable React – small part of the stack, nice to have Messaging tech: Solace (Ideal), Aeron, or Kafka … etc. Candidate Profile 8+ years of experience in Java development Strong Front Office exposure – must have Pricing or risk platform experience is a plus Confident communicator with the ability (and experience) to work closely with the desk and quants Why Apply? Hybrid working: 2–3 days from home Emphasis More ❯

Java Software Engineer Provider of FX Trading Solutions seek Java Engineers to work on low latency, high performance, real time applications. You will have the opportunity to build high-speed, data-intensive applications that scale elastically meet tough performance requirements. You will work within a pod … trading services, order routing, FIX connectivity, real-time price services, database designs, cloud-based micro-services, big data solutions and more. Good general Core Java, algorithms etc is required and the role will be 3 days a week onsite in London. Skills needed: Core Java and happy to More ❯

Job title - Java Software Engineer Location - London, UK We are seeking a Senior Java Backend Engineer with a strong background in Java, Spring Framework , and modern NoSQL/distributed caching technologies . Key Responsibilities Design, develop, and maintain robust backend systems using Java … Apache Ignite Work closely with DevOps to containerize applications using Docker Must-Have Qualifications 5+ years of hands-on experience in backend development with Java and Spring Boot Strong understanding of RESTful APIs and microservice architecture Production experience with NoSQL databases (MongoDB preferred; DynamoDB, Redis, or similar are a More ❯

Senior Software Engineer - Full Stack Engineer- Java, React, Spring Boot An exciting opportunity to join an innovative SaaS provider in the online gaming space. Work with top-tier clients in the UK and USA, contributing to the development of new software solutions within a rapidly … expanding company. Work within their software engineering squads to develop new and modernize legacy applications using microservices. You'll primarily focus on Java backend, with a practical understanding of frontend development. As such you will need: Expertise in core Java development Spring Boot Commercial JavaScript experience Strong More ❯

A leading provider of health data analytics solutions is looking for an enthusiastic and innovative Java Software Engineer to join a small team to help maintain and extend the capabilities of the platform. A Data Analytics platform has been developed with: Java Client Java Servlets … and third line support for product issues and queries Essential Degree in Computing, Maths, Engineering, Science or equivalent Strong back-end and front-end Java development background Some experience of JavaScript Ability to think independently, creatively and flexibly Strong Object-Oriented Design skills Extensive Structured Query Language (SQL) experience … the Google Web Toolkit (GWT) Understanding of Model-View-Controller (MVC) architectures The role offers the opportunity to make a significant contribution to the software that consultants and customers use to make real differences to people's lives. The company offers a highly competitive basic salary and a comprehensive More ❯

Senior Software Engineer II – Cloud-Native & AI Solutions | Global Fintech Innovator We’re partnering with a cutting-edge global fintech company at the forefront of AI-powered decisioning and analytics to find a talented Senior Software Engineer II . This company has recently been recognized with … how financial institutions leverage data, AI, and cloud technologies to accelerate smarter decision-making. This is a high-impact role ideal for an experienced engineer who thrives on innovation and is passionate about cloud-native applications, AI/ML product development, and technical leadership within high-performing teams What … build, and operationalize large-scale AI and ML-driven applications and APIs. Lead the development of scalable, low-latency cloud-native applications, primarily using Java and AWS services. Work collaboratively with architects, cloud engineers, and product leads to shape AI/ML product requirements and roadmaps. Contribute to and More ❯

Referment has partnered with a leading cryptocurrency firm focused on blockchain innovation who are seeking a Lead Java Software Developer to join their team and help build secure, scalable software solutions within the digital finance space. Role Overview: The Lead Java Software Developer will lead … the design and development of Java-based applications, contributing to the creation of decentralized finance (DeFi) solutions and blockchain-based systems. Key Responsibilities: Develop secure, scalable Java applications. Collaborate with cross-functional teams to deliver innovative solutions. Implement blockchain protocols for DeFi systems. Conduct code reviews and mentor … junior developers. Stay updated on blockchain trends and Java best practices. Qualifications & Skills: SET degree from a top UK university. 5+ years of Java development experience, especially in backend and microservices. Experience with cryptocurrency and blockchain is a plus. Proficiency with Java frameworks (e.g., Spring, Hibernate) and More ❯

Mid-Level Java Engineer My client is a leading financial services firm dedicated to providing innovative solutions and cutting-edge technology in the finance sector. With a commitment to excellence, they are seeking a talented and experienced Mid-Level Java Engineer to join our dynamic team. … passionate about finance, technology, and thrive in a collaborative environment, we invite you to apply. Responsibilities: Design, develop, and maintain high-performance and scalable Java applications. Collaborate with cross-functional teams to understand project requirements and translate them into technical specifications. Implement best practices for software development, ensuring … contribute to a culture of continuous improvement. Qualifications: Bachelor's degree in Computer Science, Engineering, or related field. 3+ years of professional experience in Java development. Solid understanding of Kotlin and experience in using it for building robust applications. Proficiency in the Spring framework, including Spring Boot. Hands-on More ❯

Join the Growth Story at Envitia Join Envitia, a leader in the UK's digital and software services landscape, where your work in cutting-edge technology empowers our customers to manage, share, and exploit data more effectively: Influence significant digital and data transformation projects within the UK public sector. … make a real impact, grow with a supportive team, and help shape the future of data solutions in trusted sectors. The Role The Principal Java Engineer has a critical role within the Engineering function, tasked with setting technical standards and influencing the architectural decisions that shape the company … s software solutions. This position is suited for a seasoned expert who not only technically leads projects within their domain of expertise but also supports business development efforts through pre-sales engagements. The Principal Engineer will guide the technology strategy, collaborate with cross-functional teams and ensure the More ❯

A leading company in the Renewable Energy space are on the hunt for a Full-Stack Software Engineer to join their highly skilled engineering team! They are a company who are HUGE on innovation and quality engineering and require an experienced set of hands to join their diverse … grow & excel. They heavily promote a collaborative, open & team orientated culture that promotes innovation and forward thinking! They are looking for a Full-Stack Software Engineer who comes with a engineering background using TypeScript, Vue OR React on the Frontend & Kotlin OR Java on the backend. Experience More ❯

Senior Java Developer - Java SDK, J2SE, - Hybrid 2 days a week, London This will be working for a leading travel technology company that provide the search engine function for booking services within airlines, hotels, and rail companies around the world. As the Senior Java developer, you will … you will be responsible for the development and maintenance of the applications. Your experience and knowledge must be in depth on core and technical Java programming, web architectures and databases. The depth in Java and your experience must reflect/include data structures, software design principles and … algorithms Requirements: Excellent knowledge of core Java Understanding of algorithms and data structures Strong problem-solving skills Solid knowledge of Java SDK/J2SE Degree in computer science or very similar Clean coding practices and ability to write clear technical documentation JavaScript and Node would be beneficial If More ❯

create efficiencies in transport execution that have a positive impact on the economy, boost individual business results and benefit the environment. As a Senior Software Engineer you will support us in developing and maintaining essential platform services for the transportation domain. These services are seamlessly integrated as core … Experience: Interest in contract of employment. 3+ years of experience developing frontend/backend services Strong experience in building comprehensive user interfaces as a Java full stack developer or front end engineer with significant backend experience Experience in developing services in Java, Spring, Spring boot using maven … eager to learn and contribute using next gen technologies Professional skills in communicating in English working with International teams Tech Stack: Backend development in Java with Spring, Spring Boot, REST API Frontend development experience with HTML, CSS, TypeScript, Angular CI/CD: Docker, Kubernetes, GitLab or GitHub Database: PostgreSQL More ❯

Fimador is partnering with an entrepreneurial fintech platform to identify a Java Developer . Based in the city of London, you will join a small, highly talented team working across the full development lifecycle and will have superb opportunities to progress your career as the organisation grows. They seek … a software engineer who is excited to architect, design, and implement low latency Java systems that are robust, resilient, accurate, stable, and blindingly fast. By building and maintaining this high-performance infrastructure, you will work closely with the trading team to gather requirements and develop solutions in … problems. About you: A degree in computer science or a related field A strong background in data structures, algorithms, and object-oriented programming in Java Strong understanding of low-latency and real-time system design and implementation You’ll have experience within financial services - FX or payments industry experience More ❯

Senior Java Developer 🌍 £100k–£150k 💸 - Remote Working 🏡 – 6+ years experience (PhD Required) Our client, a GreenTech specialising in optimum renewable energy software, is revolutionising the energy industry by making sustainable living accessible and effortless for both suppliers and consumers. They’re looking for a Senior Java Developer … passionate about new, advanced technologies, being able to create impactful solutions in a fast-paced, collaborative environment. Role Highlights 🌟 Design and implement high-performance software systems using Core Java, without relying on frameworks. Tackle multi-threaded, low-latency challenges, manage extensive data streams, and optimise asynchronous programming for … sustainable energy solutions, contributing to a greener future. Key Requirements ✅ Compulsory: A PhD in Computer Science and the ability to demonstrate extensive knowledge in Software Development. 6+ years with extensive hands-on experience in Core Java, developing systems from the ground up without frameworks. Advanced proficiency in multi More ❯

Senior Java Developer 🌍 Up to £150k 💸 - Remote Working 🏡 – 6+ years experience Our client, a GreenTech specialising in optimum renewable energy software, is revolutionising the energy industry by making sustainable living accessible and effortless for both suppliers and consumers. They’re looking for a Senior Java Developer who … is able to leverage advanced technologies to create impactful solutions in a fast-paced, collaborative environment. Role Highlights 🌟 Design and implement high-performance software systems using Core Java , without relying on frameworks. Tackle multi-threaded, low-latency challenges, manage extensive data streams, and optimise asynchronous programming for real … scalability. Drive projects that advance sustainable energy solutions, contributing to a greener future. Key Requirements ✅ 6+ years with extensive hands-on experience in Core Java, developing systems from the ground up without frameworks. Advanced proficiency in multi-threading, low-latency solutions, and data stream management. Strong understanding and practical More ❯

The Team: S&P Global corporates value stream technology team consists of geographically diversified software engineers responsible to develop scalable solutions by working directly with product development team. Our team culture is oriented towards equality in the realm of software engineering irrespective of hierarchy promoting innovation. One should … intelligence and workflow capabilities. Develop design and architecture exposure and ability to ensure quality across various technology components that are developed by geographically diversified software engineer Superior knowledge of system architecture, object-oriented design, and design patterns. Proficient with software development lifecycle (SDLC) methodologies like Agile, Test … in designing, developing, testing, and successfully deploying critical and complex projects Strong Knowledge of User Interface design & development using React, HTML5, XML & CSS Strong Java skills with experience in development of concurrent and distributed systems Advanced experience with Spring-based technologies (Spring Boot etc.) Experience in designing and implementing More ❯

Low Latency Engineer | Fully Remote | Crypto Trading Systems We’re working with one of the leading names in Crypto, and they’re looking for a Low Latency Engineer to join their team and build out a high-performance trading system - all while working fully remotely. Role Overview: As … a key engineer, you’ll be responsible for developing ultra-low latency, high-throughput Java applications powering next-generation crypto trading. You’ll work closely with a world-class team in a fast-paced and innovative environment. What You'll Need: ✅ 8+ years of professional experience developing high … performance Java applications ✅ Proven background in designing and building low latency trading systems ✅ Bachelor’s degree in Computer Science or a STEM-related field ✅ Experience working in financial services (hedge funds, trading firms, investment banks, or exchanges) Why Join? 🌍 Fully Remote - Work from anywhere 🌟 Work at the cutting edge More ❯