18 of 18 Permanent Senior Java Engineer Jobs in the South East

suite leadership teams across FTSE companies, private businesses and major government departments in order to transform their organisations. We are currently looking for a Senior Java Software Engineer to work with a broad range of blue-chip companies and public sector organisations. As a Senior Java Engineer , you will be working on projects that employ cutting edge technologies and deliver high profile solutions that make a genuine difference to everyday life. A Successful Senior Java Software Engineer Will Have: Strong object-oriented programming principles in Java. Extensive experience in leveraging Java … implementing RESTful services using JAX-RS. Experience in hosting and orchestration using Docker, Kubernetes and AWS Autoscaling Groups. Experience in a position of leadership. Senior Java Software Engineer Key Details: Up to £75k Salary. 10-20% discretionary bonus. Hybrid Working. Travel allowance. Requires eligibility for SC Clearance. More ❯

Senior Engineer - Java, React.js, Node.js, SQL, AWS London, UK - Hybrid (2 days a week in office) Permanent £75,000 - £90,000 Got a passion for tackling tough challenges and making a real difference? My client, a forward-thinking and impactful organisation at the forefront of developing cutting … edge solutions to combat online fraud, is on the lookout for a sharp Senior Java Engineer to join their collaborative team. You'll be right in the thick of it, building and improving systems that genuinely help protect people. Plus, you'll get to connect with smart … to-day: Keeping their current systems running smoothly and making them even better. Getting creative and building new features and products from scratch. Using Java to create software that's not just good, but rock-solid, scalable, and lightning-fast. Making different systems talk to each other through APIs. More ❯

Senior Java Engineer Department: Engineering Employment Type: Full Time Location: Oxford Description About Diffblue Diffblue is changing the way software is developed. We build products that have the potential to improve the experience of every software developer in the world. By using Artificial Intelligence to write unit … marketing teams. We're backed by the University, our customers and leading venture capital funds. Our product Diffblue Cover automatically writes unit tests for Java applications using AI, mimicking human-written tests but working 250 times faster than a human - and it never gets bored or makes a mistake. … a modern business, and that when different opinions, backgrounds and life views meet, better results are obtained. Job purpose We are looking for skilled Java developers to work as part of a team with experts in AI, static and dynamic program analysis, and software verification. This is a great 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 … 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-time 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 expertise in asynchronous More ❯

Senior Java Developer 🌍 Up to £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 … 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 real-time scalability. Drive projects … 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-threading, low-latency solutions, and data stream management. Strong knowledge of Advanced 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 … 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-time 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 expertise in asynchronous More ❯

Senior Java Developer 🌍 Up to £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 … 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 real-time scalability. Drive projects … 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-threading, low-latency solutions, and data stream management. Strong knowledge of Advanced 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 ❯

Senior Core Java Developer 🤖 - Up to £120k DOE 💰 - Hybrid (London) 🏡 Our client is a highly trusted player in asset management and FX trading, looking to recruit a proficient Senior/Core Java Developer to join their apps team. This opportunity will allow you to join a … offerings and the team’s workflows.⚙️ Work primarily within GCP, ensuring that the architecture is optimized for multi-cloud compatibility.🔒 Key Requirements: An experienced engineer with 7-8 years of experience.🤖 Strong knowledge and hands-on experience with Core Java. You understand which networking tools are relevant to cloud … A generous annual bonus , historically reaching up to 30%. 💰 Hybrid working pattern, with two days remote a week.🏡 If you’re a Core Java Developer looking to take your career to the next level, apply today to be considered for this excellent opportunity More ❯

or be prepared to undergo National Security Vetting (NSV) to Security Check (SC) level as a minimum. Your future duties and responsibilities As a Senior Software Engineer, you'll join a flagship UK Government programme working on a project that helps protect UK citizens' lives. Working as part … of a well-functioning team, you'll immediately add Java expertise at an important stage of the project cycle. You will be responsible for developing, maintaining, and enhancing high-quality software solutions while ensuring best practices and industry standards are met. You'll also discover: • A unique level of … meet-ups, discussions, and shared best practices. Required qualifications to be successful in this role We are looking for experienced software engineers with strong Java expertise and a passion for solving complex problems. You should have a background in designing and implementing software solutions in an enterprise environment, with More ❯

or be prepared to undergo National Security Vetting (NSV) to Security Check (SC) level as a minimum. Your future duties and responsibilities As a Senior Software Engineer you'll join a flagship UK Government programme working on a project that helps protect UK citizens' lives. Working as part … of a well-functioning team, you'll immediately add Java expertise at an important stage of the project cycle. You'll also discover: • A unique level of variety across different clients and industry sector • Further interesting and challenging projects to stretch your skills • Training and support specifically tailored to … discussions, and shared best practice Required qualifications to be successful in this role Essential skills to be successful in this role: • Broad knowledge of JAVA/JAVA EE - current and legacy versions, including best practices and patterns for code migrations • Knowledge of best practices regarding continuous Integration/ More ❯

to a demanding standard that pushes us to the best we can be. Job Summary We are looking for a highly skilled and adaptable Senior Java/Flink Engineer to lead software development across our data pipeline products. You’ll be a critical member of the team … other engineers as we execute on our mission. Our platform is multi-disciplinary, and our tech stack reflects this. We utilize Python, Go and Java on the backend, and Typescript/Next.js on the front. We heavily leverage Postgres, Timescale and Redis for storage, and utilize both AWS, Azure … Ferry platform for which we augment Apache Flink and cloud IoT platforms to support this. Who you are Minimum 7+ years as a Backend Engineer Thorough understanding & experience in Java Deep & thorough understanding of Apache Flink Experience with Kafka Comprehensive knowledge and experience building, testing and deploying APIs More ❯

Job Title : Senior Java Developer Location : London/Knutsford/Northampton Type of role : Permanent Get The Future You Want! Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired … your strong experience of TDD and automation to further increase confidence in and quality of the systems you work on. Skills Required: Experience in Java (version 8 essential, version 12 a bonus), Spring, SQL and messaging (Soap/Xml/RESTful services). Experience in test driven development and More ❯

Java Developer – Digital Assets/Crypto Trading Desk We are currently seeking an experienced Java Developer to join a newly established Digital Assets & Crypto Trading and Market Making desk at a leading systematic trading firm. This is a unique opportunity to work closely with traders and quantitative researchers … system components such as the OMS and market data handlers Required Skills & Experience Proven experience building low-latency trading systems Strong proficiency in Core Java, including multi-threading, concurrency, and design patterns Familiarity with cloud technologies, particularly AWS Demonstrated experience working in close partnership with traders and quantitative teams More ❯

Job Title: Java Developer (Electronic Trading Platform - FIC) Contract Type: Outside IR35 Location: London Day Rate: Up to £850 per day Flexible Hybrid working: 1-2 days a week in London City offices Client: Prestigious Investment Bank Industry: Investment Banking Duration: 12 months + Overview: We are seeking an … experienced Java Developer to join a high-profile investment banking client in London on a contract basis. The successful candidate will work on an Electronic Trading Platform for the FIC business . This is an exciting opportunity to contribute to the development and integration of advanced trading technologies in … making capabilities. Integrate with Instrumentation Platforms : Integrate the platform with Prometheus and Geneos for continuous monitoring, diagnostics, and system health checks. Desired technical Skills: Java Expertise: Extensive experience with Core Java , focusing on low-level performance tuning, multithreading , and garbage collection optimization . FIC or similar business knowledge 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 ❯

be doing: Taking your place as a core member of an agile team driving the latest development practices Writing code and unit tests in Java, working with API specs and automation Identifying opportunities for adopting new technologies Working with a team of engineers that delivers knowledge management solutions to 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 databases (e.g., MySQL More ❯