1 to 25 of 35 Permanent Java Software Engineer Jobs in the South East

Java Software Engineer - Banking London – 1 day a week onsite 🚀 Join a FinTech Powering the Future of Payments Are you a Java Software Engineer who thrives in a fast-paced, agile environment? Passionate about high-throughput, real-time systems? This is your opportunity to help shape the core technology that powers instant payments for … to enable real-time, secure transactions across the globe. 🔍 What You’ll Be Doing You’ll join a high-performing engineering team building asynchronous, event-driven systems using modern Java technologies. Design and build scalable, high-availability systems processing millions of real-time transactions Work with Java 17+, Spring WebFlux, AKKA, Kafka, and more Write clean, testable code … Kanban/Scrum) 🧠 What You Bring We’re looking for engineers who are pragmatic, performance-focused, and thrive on solving complex distributed systems problems. Strong hands-on experience with Java 11+ (ideally Java 17) Solid knowledge of Reactive Programming (e.g., Spring WebFlux, AKKA) Experience with event-driven architecture, real-time messaging systems (Kafka, JMS) Familiarity with asynchronous request More ❯

Java Software Engineer - Banking London – 1 day a week onsite 🚀 Join a FinTech Powering the Future of Payments Are you a Java Software Engineer who thrives in a fast-paced, agile environment? Passionate about high-throughput, real-time systems? This is your opportunity to help shape the core technology that powers instant payments for … to enable real-time, secure transactions across the globe. 🔍 What You’ll Be Doing You’ll join a high-performing engineering team building asynchronous, event-driven systems using modern Java technologies. Design and build scalable, high-availability systems processing millions of real-time transactions Work with Java 17+, Spring WebFlux, AKKA, Kafka, and more Write clean, testable code … Kanban/Scrum) 🧠 What You Bring We’re looking for engineers who are pragmatic, performance-focused, and thrive on solving complex distributed systems problems. Strong hands-on experience with Java 11+ (ideally Java 17) Solid knowledge of Reactive Programming (e.g., Spring WebFlux, AKKA) Experience with event-driven architecture, real-time messaging systems (Kafka, JMS) Familiarity with asynchronous request More ❯

Java Software Engineer - Banking London – 1 day a week onsite 🚀 Join a FinTech Powering the Future of Payments Are you a Java Software Engineer who thrives in a fast-paced, agile environment? Passionate about high-throughput, real-time systems? This is your opportunity to help shape the core technology that powers instant payments for … to enable real-time, secure transactions across the globe. 🔍 What You’ll Be Doing You’ll join a high-performing engineering team building asynchronous, event-driven systems using modern Java technologies. Design and build scalable, high-availability systems processing millions of real-time transactions Work with Java 17+, Spring WebFlux, AKKA, Kafka, and more Write clean, testable code … Kanban/Scrum) 🧠 What You Bring We’re looking for engineers who are pragmatic, performance-focused, and thrive on solving complex distributed systems problems. Strong hands-on experience with Java 11+ (ideally Java 17) Solid knowledge of Reactive Programming (e.g., Spring WebFlux, AKKA) Experience with event-driven architecture, real-time messaging systems (Kafka, JMS) Familiarity with asynchronous request More ❯

Software Engineer/Developer (Java AWS React) London/WFH to £110k Are you a technologist looking for an opportunity to be part of something big from the start? You could be progressing your career in an impactful role at a newly established Fintech start-up, set up by a small team of finance and technology entrepreneurs … with a hugely successful track record. As a Software Engineer you will join a small team to build systems from the ground up, working across the full technology stack with a focus on designing, developing and deploying cloud-native microservices that form the core of the platform. You'll collaborate closely with the Lead Engineer, Architect and … time, meeting up with colleagues in London; as the company grows there will likely be some in office requirements but with lots of flexibility. About you: You have strong Java, AWS and Kubernetes skills and also have a good appreciation of user interface/front end development using React or Tailwind CSS You have a strong knowledge of modern More ❯

Job Description Senior Software Engineer Location: Farnborough, with flexibility to work from home dependent on business demands The Role: We are in search of a Senior Software Engineer t o support a Government Critical National Infrastructure project. As a Senior Software Engineer you will l ead multiple software development team(s) to deliver … his position is a full time, permanent role and applicants must have SC clearance or be willing to undergo the clearance process. What will I be doing? Lead multiple software development team(s) to deliver solutions with architectures that provide capability improvements, reduced costs and flexibility to adapt quickly to customer needs. Understand high-level features and desired outcomes … of those outcomes and maintaining a roadmap of capability improvements (in conjunction with the Senior Leadership Team) related to the softwares architecture and the end-to-end design. Formulate software designs that create solutions meeting various desired outcomes (both now and future) while balancing the goals and constraints on the solutions (i.e. customer environment, cybersecurity, continuous integration/continuous More ❯

Java Software Engineer – Consultancy (multiple locations available in the UK) - competitive salary** Please note – due to the nature of work, all candidates must have DV clearance (UKIC Preferable) that is active and transferrable We are looking for a Java Software Engineer to join our consulting client. We have multiple locations available Responsibilities Participate in … agile software development practices, including daily stand-ups, sprint planning, and retrospectively Contribute to the continuous improvement of our team's processes and help us become more efficient Identify opportunities for improvement and propose innovative solutions to keep our client ahead of the curve Meet project deadlines and achieve company objectives, helping us bring our mission to life Key … skills and experience Coding experience in object-oriented languages such as Java, TypeScript or C# Familiarity with front-end web technologies such as HTML, CSS, and JavaScript frameworks like React Strong problem-solving skills and the ability to think critically Excellent communication and interpersonal skills A positive attitude and the ability to work well with others Self-motivated and More ❯

Java Software Engineer – Consultancy (multiple locations available in the UK) - competitive salary** Please note – due to the nature of work, all candidates must have DV clearance (UKIC Preferable) that is active and transferrable We are looking for a Java Software Engineer to join our consulting client. We have multiple locations available Responsibilities Participate in … agile software development practices, including daily stand-ups, sprint planning, and retrospectively Contribute to the continuous improvement of our team's processes and help us become more efficient Identify opportunities for improvement and propose innovative solutions to keep our client ahead of the curve Meet project deadlines and achieve company objectives, helping us bring our mission to life Key … skills and experience Coding experience in object-oriented languages such as Java, TypeScript or C# Familiarity with front-end web technologies such as HTML, CSS, and JavaScript frameworks like React Strong problem-solving skills and the ability to think critically Excellent communication and interpersonal skills A positive attitude and the ability to work well with others Self-motivated and More ❯

Java Software Engineer – Consultancy (multiple locations available in the UK) - competitive salary** Please note – due to the nature of work, all candidates must have DV clearance (UKIC Preferable) that is active and transferrable We are looking for a Java Software Engineer to join our consulting client. We have multiple locations available Responsibilities Participate in … agile software development practices, including daily stand-ups, sprint planning, and retrospectively Contribute to the continuous improvement of our team's processes and help us become more efficient Identify opportunities for improvement and propose innovative solutions to keep our client ahead of the curve Meet project deadlines and achieve company objectives, helping us bring our mission to life Key … skills and experience Coding experience in object-oriented languages such as Java, TypeScript or C# Familiarity with front-end web technologies such as HTML, CSS, and JavaScript frameworks like React Strong problem-solving skills and the ability to think critically Excellent communication and interpersonal skills A positive attitude and the ability to work well with others Self-motivated and More ❯

Staff Software Engineer/Developer (Java Kotlin AWS API) Hybrid WFH to £110k Would you like to progress your career in an impactful hands-on Software Engineer role working on Tech for Good? You could be joining a HealthTech Start-up, founded by two highly successful, Cambridge University educated management consultants, that is aiming to … and social care for all by using complex technology to improve access to patient records, enabling collaboration between healthcare providers and improving nursing and medical care. As a Staff Software Engineer you will collaborate with the CTO on the overall design and architecture of the products' tech stack, working on Greenfield applications. The tech stack is based on … there once every three weeks, and also occasionally visit clients in the South West to gather requirements and liaise on bespoke product development. About you: You have expertise with software engineering best practices, experience across the full development lifecycle and tech stack You have experience with Kotlin, Java, SpringBoot and AWS You have a good understanding of APIs More ❯

Senior Java Engineer – Exchange Connectivity! 💹💰 Salary: Up to £150,000 + bonus (previously 20-30%) + benefits 📍 Location: 3 days onsite, City of London Do you enjoy writing high-performance, low-latency Java code day-to-day? Do you have commercial experience in exchange trading/exchange connectivity? This highly respected, global financial institution is expanding its … London office and is on the lookout for a Senior Java Engineer to work on their high-performance exchange connectivity solutions for global trading. This includes traditional financial and digital assets (including crypto). As the Senior Java Engineer, you will: Be specialising in low-latency, high-performance trading systems using Core Java. Work in a … very fast-moving environment Contribute to the architecture of the end-to-end trading system Tackle complex challenges regarding scalability and high-frequency trading (HFT) readiness 💻 Tech Stack: Core Java, multithreading, low-latency systems, Kafka, AWS/GCP, Docker, Kubernetes, TDD, Agile, CI/CD. You'll be a great fit if you have: A degree in Computer Science More ❯

Senior Java Engineer – Exchange Connectivity! 💹💰 Salary: Up to £150,000 + bonus (previously 20-30%) + benefits 📍 Location: 3 days onsite, City of London Do you enjoy writing high-performance, low-latency Java code day-to-day? Do you have commercial experience in exchange trading/exchange connectivity? This highly respected, global financial institution is expanding its … London office and is on the lookout for a Senior Java Engineer to work on their high-performance exchange connectivity solutions for global trading. This includes traditional financial and digital assets (including crypto). As the Senior Java Engineer, you will: Be specialising in low-latency, high-performance trading systems using Core Java. Work in a … very fast-moving environment Contribute to the architecture of the end-to-end trading system Tackle complex challenges regarding scalability and high-frequency trading (HFT) readiness 💻 Tech Stack: Core Java, multithreading, low-latency systems, Kafka, AWS/GCP, Docker, Kubernetes, TDD, Agile, CI/CD. You'll be a great fit if you have: A degree in Computer Science More ❯

Role: Senior Java Engineer Location: London (Hybrid) We’re looking for an experienced Senior Java Engineer to join our cloud engineering consultancy. In this role you will be playing a key role in delivering high-performance backend services in a fast-moving, cloud-native environment — where releasing multiple times per day is the norm. This is … a hands-on engineering role with the opportunity to work on cutting-edge systems from day one. Tech Stack: Java (with experience with another language such as Golang, Kotlin, Python etc) Spring Boot Kubernetes , AWS Grafana , GitHub Event-driven architecture, microservices CI/CD & rapid delivery tooling What You’ll Be Doing: Build scalable and secure microservices using Java … in a high-frequency release environment — deploying multiple times per day Use Grafana (or similar) for observability and maintain production-grade reliability We’re Looking For: 5+ years of Java engineering experience (Java 11+; ideally Java 21) Strong background with Spring Boot , microservices, and cloud-native design Hands-on with Docker, Kubernetes , AWS , and containerised deployments CI More ❯

Role: Senior Java Engineer Location: London (Hybrid) We’re looking for an experienced Senior Java Engineer to join our cloud engineering consultancy. In this role you will be playing a key role in delivering high-performance backend services in a fast-moving, cloud-native environment — where releasing multiple times per day is the norm. This is … a hands-on engineering role with the opportunity to work on cutting-edge systems from day one. Tech Stack: Java (with experience with another language such as Golang, Kotlin, Python etc) Spring Boot Kubernetes , AWS Grafana , GitHub Event-driven architecture, microservices CI/CD & rapid delivery tooling What You’ll Be Doing: Build scalable and secure microservices using Java … in a high-frequency release environment — deploying multiple times per day Use Grafana (or similar) for observability and maintain production-grade reliability We’re Looking For: 5+ years of Java engineering experience (Java 11+; ideally Java 21) Strong background with Spring Boot , microservices, and cloud-native design Hands-on with Docker, Kubernetes , AWS , and containerised deployments CI More ❯

Role: Senior Java Engineer Location: London (Hybrid) We’re looking for an experienced Senior Java Engineer to join our cloud engineering consultancy. In this role you will be playing a key role in delivering high-performance backend services in a fast-moving, cloud-native environment — where releasing multiple times per day is the norm. This is … a hands-on engineering role with the opportunity to work on cutting-edge systems from day one. Tech Stack: Java (with experience with another language such as Golang, Kotlin, Python etc) Spring Boot Kubernetes , AWS Grafana , GitHub Event-driven architecture, microservices CI/CD & rapid delivery tooling What You’ll Be Doing: Build scalable and secure microservices using Java … in a high-frequency release environment — deploying multiple times per day Use Grafana (or similar) for observability and maintain production-grade reliability We’re Looking For: 5+ years of Java engineering experience (Java 11+; ideally Java 21) Strong background with Spring Boot , microservices, and cloud-native design Hands-on with Docker, Kubernetes , AWS , and containerised deployments CI More ❯

Senior Software Engineer – Backend (Java) 📅 6-Month Contract | 🏢 Hybrid (2 Days in Office) | 💷 £600 p/d inside ir35 We’re looking for a skilled Backend Java Engineer to join an innovative team on a 6-month contract. If you love solving complex problems, mentoring others, and working on cutting-edge data platforms at scale … this one’s for you! 🙌 🌟 What you’ll do: 💻 Develop and maintain scalable, data-driven applications in Java 🛠️ Lead on requirements, design workshops, and solutioning 🤝 Mentor junior engineers and share best practices ☁️ Implement & optimise microservices and distributed systems on GCP (GKE, PubSub, BigQuery, Dataflow) using Docker & Kubernetes 🔄 Build and manage efficient data pipelines with streaming tech + relational/… integration, and non-functional testing ⚡ Contribute to CI/CD practices with Jenkins and Git 🕵️ Troubleshoot, propose improvements, and stay ahead of emerging technologies 💡 What you’ll bring: 🔑 Strong Java & OOP experience 📊 Background in data platforms, frameworks & streaming technologies 🧩 Familiarity with microservices & distributed systems ☁️ Exposure to GCP (GKE, PubSub, BigQuery) 🗄️ Experience with relational/NoSQL databases 🐳 Proficiency with Docker More ❯

Senior Software Engineer – Backend (Java) 📅 6-Month Contract | 🏢 Hybrid (2 Days in Office) | 💷 £600 p/d inside ir35 We’re looking for a skilled Backend Java Engineer to join an innovative team on a 6-month contract. If you love solving complex problems, mentoring others, and working on cutting-edge data platforms at scale … this one’s for you! 🙌 🌟 What you’ll do: 💻 Develop and maintain scalable, data-driven applications in Java 🛠️ Lead on requirements, design workshops, and solutioning 🤝 Mentor junior engineers and share best practices ☁️ Implement & optimise microservices and distributed systems on GCP (GKE, PubSub, BigQuery, Dataflow) using Docker & Kubernetes 🔄 Build and manage efficient data pipelines with streaming tech + relational/… integration, and non-functional testing ⚡ Contribute to CI/CD practices with Jenkins and Git 🕵️ Troubleshoot, propose improvements, and stay ahead of emerging technologies 💡 What you’ll bring: 🔑 Strong Java & OOP experience 📊 Background in data platforms, frameworks & streaming technologies 🧩 Familiarity with microservices & distributed systems ☁️ Exposure to GCP (GKE, PubSub, BigQuery) 🗄️ Experience with relational/NoSQL databases 🐳 Proficiency with Docker More ❯

Senior Software Engineer – Backend (Java) 📅 6-Month Contract | 🏢 Hybrid (2 Days in Office) | 💷 £600 p/d inside ir35 We’re looking for a skilled Backend Java Engineer to join an innovative team on a 6-month contract. If you love solving complex problems, mentoring others, and working on cutting-edge data platforms at scale … this one’s for you! 🙌 🌟 What you’ll do: 💻 Develop and maintain scalable, data-driven applications in Java 🛠️ Lead on requirements, design workshops, and solutioning 🤝 Mentor junior engineers and share best practices ☁️ Implement & optimise microservices and distributed systems on GCP (GKE, PubSub, BigQuery, Dataflow) using Docker & Kubernetes 🔄 Build and manage efficient data pipelines with streaming tech + relational/… integration, and non-functional testing ⚡ Contribute to CI/CD practices with Jenkins and Git 🕵️ Troubleshoot, propose improvements, and stay ahead of emerging technologies 💡 What you’ll bring: 🔑 Strong Java & OOP experience 📊 Background in data platforms, frameworks & streaming technologies 🧩 Familiarity with microservices & distributed systems ☁️ Exposure to GCP (GKE, PubSub, BigQuery) 🗄️ Experience with relational/NoSQL databases 🐳 Proficiency with Docker More ❯

Java Software Engineer £55,000-£70,000/annum Once every two weeks on client site - likely London SC position - UK Eyes Only Sanderson Government and Defence are working alongside a growing, exciting consultancy business who have recently won several exciting new projects in the UK public sector. They are a highly flexible business, with the only … across a number of different projects, we are relatively open minded, however there are a few essentials. You must have 4+ years experience, and be capable with the following: Java Spring ecosystem AWS Cloud Microservices React (optional) Towards the upper end of the salary banding, we would also expect experience in mentoring, willingness and experience engaging with clients, and More ❯

Java Software Engineer £50,000-£75,000/annum Fully Remote SC position - Clearable Sanderson Government and Defence are working alongside a growing, exciting consultancy business who have recently won several exciting new projects in the UK public sector. They are a highly flexible business, with fully remote working available. Technically, as you could end up working … across a number of different projects, we are relatively open minded, however there are a few essentials. You must have 4+ years experience, and be capable with the following: Java Spring ecosystem AWS Cloud Microservices Towards the upper end of the salary banding, we would also expect experience in mentoring, willingness and experience engaging with clients, up to team More ❯

Java Software Engineer with around 3-5 years professional, post-graduate experience sought by one of the original Quantitative Hedge Funds, with a 20+ year track-record. The firm are renowned for a healthy, supportive, and collegiate working environment and culture, with no siloes, boasting an industry-leading staff tenure. This hire will be part of a … core Software Engineering team, responsible for the vast majority of all applications in the business from front-to-back office.This includes Order Management & Trading Execution, Risk & Finance, Straight-Through-Processing and Corporate Functions. The team deal directly with business users right across the firm, taking ownership of analysis, design, architecture, and implementation, working primarily with Java, but also … SQL and MATLAB. They currently have an opening for a mid-level hire in the team, with around 3-5 years’ experience.The successful applicant should have exposure to modern software engineering techniques such as CI/CD as well as excellent Computer Science Fundamentals, OOP, Concurrency, and Java Generics. Excellent communication skills are also extremely important for the More ❯

Java Software Engineer with around 3-5 years professional, post-graduate experience sought by one of the original Quantitative Hedge Funds, with a 20+ year track-record. The firm are renowned for a healthy, supportive, and collegiate working environment and culture, with no siloes, boasting an industry-leading staff tenure. This hire will be part of a … core Software Engineering team, responsible for the vast majority of all applications in the business from front-to-back office.This includes Order Management & Trading Execution, Risk & Finance, Straight-Through-Processing and Corporate Functions. The team deal directly with business users right across the firm, taking ownership of analysis, design, architecture, and implementation, working primarily with Java, but also … SQL and MATLAB. They currently have an opening for a mid-level hire in the team, with around 3-5 years’ experience.The successful applicant should have exposure to modern software engineering techniques such as CI/CD as well as excellent Computer Science Fundamentals, OOP, Concurrency, and Java Generics. Excellent communication skills are also extremely important for the More ❯

Java Software Engineer with around 3-5 years professional, post-graduate experience sought by one of the original Quantitative Hedge Funds, with a 20+ year track-record. The firm are renowned for a healthy, supportive, and collegiate working environment and culture, with no siloes, boasting an industry-leading staff tenure. This hire will be part of a … core Software Engineering team, responsible for the vast majority of all applications in the business from front-to-back office.This includes Order Management & Trading Execution, Risk & Finance, Straight-Through-Processing and Corporate Functions. The team deal directly with business users right across the firm, taking ownership of analysis, design, architecture, and implementation, working primarily with Java, but also … SQL and MATLAB. They currently have an opening for a mid-level hire in the team, with around 3-5 years’ experience.The successful applicant should have exposure to modern software engineering techniques such as CI/CD as well as excellent Computer Science Fundamentals, OOP, Concurrency, and Java Generics. Excellent communication skills are also extremely important for the More ❯

SENIOR JAVA DEVELOPER Salary: £70-80k/year In this role, you will be responsible for the delivery of exciting projects and products across our Civil Aviation, Defence and Public Sector industry verticals . Required Skills You will be a full stack Software Engineer with experience of enterprise grade software development and an agile development … environment. Experience and Expertise: Years of Experience: 5 years in software engineering. Programming Languages : Robust experience in JAVA. Proficiency in C# is also valuable. Familiar with frameworks like Spring or .NET. Services and REST APIs : Solid background in developing services and RESTful APIs, demonstrating an understanding of web services architecture and implementation. Frontend Framework : Competent in Angular and able … in SQL and data modelling. SOLID Principles: Proficient in applying SOLID principles for object-oriented programming, ensuring clean, maintainable, and scalable code. Additional Skills (Good to Have): Programming Language: JAVA Containerization and Orchestration: Experience with technologies like Docker and Kubernetes. These are essential for scalable, efficient deployment and management of applications. Agile Methodology : Ideally experienced in Agile practices, capable More ❯

SENIOR JAVA DEVELOPER Salary: £70-80k/year In this role, you will be responsible for the delivery of exciting projects and products across our Civil Aviation, Defence and Public Sector industry verticals . Required Skills You will be a full stack Software Engineer with experience of enterprise grade software development and an agile development … environment. Experience and Expertise: Years of Experience: 5 years in software engineering. Programming Languages : Robust experience in JAVA. Proficiency in C# is also valuable. Familiar with frameworks like Spring or .NET. Services and REST APIs : Solid background in developing services and RESTful APIs, demonstrating an understanding of web services architecture and implementation. Frontend Framework : Competent in Angular and able … in SQL and data modelling. SOLID Principles: Proficient in applying SOLID principles for object-oriented programming, ensuring clean, maintainable, and scalable code. Additional Skills (Good to Have): Programming Language: JAVA Containerization and Orchestration: Experience with technologies like Docker and Kubernetes. These are essential for scalable, efficient deployment and management of applications. Agile Methodology : Ideally experienced in Agile practices, capable More ❯

Senior Software Developer – Low-Latency Exchange Trading Location: London (Hybrid) About the Role: We are working on behalf of a leading player in the digital asset and trading infrastructure space, currently hiring a Senior Java Software Developer to join their high-performance trading systems team. This position focuses on exchange connectivity and ultra-low latency trading infrastructure … hybrid infrastructure stack. Ensure compliance with rigorous uptime, latency, and security standards. Drive automation to streamline trading workflows and reduce operational risk. Key Skills & Experience: 10+ years of commercial Java development experience in performance-critical environments. Strong understanding of exchange-facing protocols (e.g., FIX, binary, custom APIs). Advanced skills in JVM tuning, garbage collection optimisation, and memory management. More ❯