1 to 25 of 45 Permanent Java Engineer Jobs in the South East

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 … 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 8 features. Domain/Sector/… 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. If this More ❯

Job Title: Senior Java Engineer – Low Latency Systems Location: London - 2 days onsite - six-month contract - Outside IR35 - Up to £500 day rate About the Role: We’re looking for a Senior Java Engineer with a passion for low-level, high-performance systems. If you enjoy … this could be your next immediate move. What You’ll Be Doing Designing and optimising event-driven, non-blocking I/O systems using Java NIO Working with ByteBuffers and direct memory access techniques for optimal performance Developing and maintaining custom binary protocols, ideally with experience in SBE (Simple … closely with architecture teams to ensure garbage-free, latency-critical design What We’re Looking For Core Low-Latency Engineering Experience Strong command of Java NIO, selectors, channels, and event loops Deep understanding of ByteBuffer usage, memory alignment, and off-heap data structures Experience with binary protocols (fixed-width 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 … 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 university 💻 Tech Stack: Java | AWS | Multithreading | Kafka | ActiveMQ | MongoDB | DevOps Tooling More ❯

Role: Java Software Engineer/Java Developer 🌍 Location: Central London - hybrid 2 days a week onsite 💰 Salary: £60,000-£80,000 🛠 Key Skills: Core Java/SE, XML, JSON, Junit, APIs, complex/high-traffic systems A leading global B2B SaaS technology company is seeking Java … volume XML integrations, time-sensitive bug fixes, and contributing to innovative new features and products. Key Responsibilities: Develop and maintain robust backend systems in Java (Java 17). Work on complex system integrations with third-party suppliers and distributors. Handle XML feeds, web scraping, and high-frequency search … Collaborate on product design and contribute to new functionality. Work both independently and in agile teams with shifting priorities. Required Skills and Experience: Strong Java SDK/J2SE programming knowledge. Solid grasp of algorithms, data structures, and object-oriented design patterns. Proactive attitude and ability to take ownership of More ❯

Job Description Senior Java Engineer If your coding skills are backed up with a talent for solving problems, we will give you the opportunity to have real-world impact and purpose, working in one of our Central Government business units. Our Software Engineers are trusted to work closely … 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 give you the More ❯

Senior Software Engineer - Full Stack Engineer- Java, React, SpringBoot 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 React Any NoSQL DB 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 code … 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 ❯

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 in a friendly 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 tests … 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 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 React Any NoSQL 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 of … 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 ❯

Type: Inside IR35 Start Date: May 2025 Duration: 6 months to 12 months (possibility of extension) Job Overview: We are seeking a highly skilled Java Engineer with strong DevOps expertise for a hybrid role that blends deep backend engineering with modern infrastructure practices. You’ll be part of … This role is ideal for someone who thrives in complex, high-scale environments and has a passion for building robust, reactive systems using modern Java frameworks. Roles and Responsibilities: Design and implement highly scalable and reactive backend systems in Java. Utilize reactive programming frameworks like Kafka Streams , Akka , Eclipse … Vert.x , or Apache Flink . Leverage Java concurrency features including multithreading and Executor Services to ensure optimal performance. Apply functional programming paradigms in Java to write clean, efficient, and maintainable code. Champion sound engineering practices including SOLID principles , unit testing , and clean code methodologies. Deploy and manage containerized More ❯

Contract - 12 months (Inside IR35) - Java Developer (Front Office) Synechron's global consulting firm combines creativity and innovative technology to deliver industry-leading digital solutions. Synechron’s progressive technologies and optimization strategies span end-to-end Artificial Intelligence, Consulting, Digital, Cloud & DevOps, Data, and Software Engineering, servicing an array … website or LinkedIn community. Are you passionate about bringing systems to life? Do you have the drive to innovate? We are looking for a Java Developer who has worked in Front Office, Capital Markets environment. Required Skills/Experience: 7 + years hands on Java development experience in … a front-office environment Capital markets experience Java – Java 8+, Spring Boot, Microservices, Kafka, DB Strong Java script knowledge in React or Angular is useful Python – flask You'll be required to work in our or our clients office 3 days per week (both City based More ❯

Core Java Software Engineer Do you thrive in fast-paced environments and enjoy tackling complex technical challenges? Join a growing team of experts in algorithmic trading! This company is a small team of expert traders and software engineers building the future of algorithmic trading. They seek bright, kind … s newly built applications. This role requires critical thinking about user and market interactions. What you bring: 3-5 years of experience with Core Java is required. Experience with aeron clusters. Experience with databases (e.g. SQL Server, Postgres) is a plus. The company seeks experience with cloud server providers … Someone who is comfortable working in a smaller sized/start-up style company. If you are a highly motivated and results-oriented software engineer, this company wants to hear from you! This role is ideally suited for someone who understands a start-up environment, you will wear many More ❯

Regulatory Reporting Engineer - Java Salary: Up to £130,000 + Bonus + Benefits Role Type: Permanent Position Office Location: Central London Hybrid Model: 3 days per week in office, 2 days remote About the Role: We’re looking for a Lead Reporting Engineer with a strong Java … up a small, agile team focused on end-to-end reporting solutions—spanning regulatory and strategic platforms. This role combines hands-on development with Java , Spring Boot , SQL , and data frameworks, alongside leadership in project delivery and resource planning. You’ll serve as a subject matter expert (SME) across … and security teams to deliver robust, enterprise-grade solutions. Key Responsibilities Lead the design and development of reporting applications with a strong focus on Java (C#/.NET experience also valuable). Act as the technical lead for multiple Agile Scrum pods (approx. 5 people per team), providing functional More ❯

Lead Java Developer with AWS A unique development opportunity to work on a Public Sector Based Large Scale program with an innovative market leader as Lead Java Developer. Requires a Lead Java developer with strong Java experience to create and implement solutions for our portfolio of … as well as supporting live systems and diagnosing incidents. You will join a team that prides itself on collaboration and engineering the best possible Java code. Essential: Java 17+, Spring Boot, Spring DataJPA, Spring Integration, Spring Batch, Microservices, Quartz, SQL Database (PostgreSQL), JPA (Hibernate), REST and SOAP Web … Jaspersoft, Spring extension projects (Data, Cloud, Batch, Security), Angular. • Public sector experience • 8-10 years of hands-on experience with large scale Spring based java projects. • Must have experience of supporting live systems and diagnosing incidents. • Experience in large scale integration projects involving microservices, messaging, web-services and distributed More ❯

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 … 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 delivery of scalable, efficient and innovative software products. This position is … designed for an influential engineer with an extensive technical background and a strategic mindset. As a Principal Engineer, you will lead by example, champion best practices and influence the strategic direction of the overall Engineering team. Technically you will need strong Java and Angular programming experience, be More ❯

team is comprised of talented individuals who are committed to pushing boundaries and delivering excellence. As they continue to expand, they are seeking a Java Software Engineer to join our dynamic team. Role Overview: As a Java Software Engineer, you will have the opportunity to work … on exciting projects and collaborate with experienced developers. You will play a key role in designing, developing, and maintaining scalable software solutions using Java, Scala, AWS, and the Spring framework. Key Responsibilities: Develop high-quality software applications using Java, Scala, and Spring framework. Collaborate with cross-functional teams … and industry trends to continuously improve skills and solutions. Requirements: Bachelor's degree in Computer Science, Software Engineering, or a related field. Proficiency in Java programming language and experience with JVM-based frameworks such as Spring. Familiarity with Scala programming language and its ecosystem. Basic understanding of cloud computing 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 Relational … 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 More ❯

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 variety across different … 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 ❯

Job Description: Role Highlights: Location: Hybrid - Reading, Croydon Type: full-time Budget: 65K GBP SC clear is mandatory Job Title: Java Full stack Software Engineer Job Description: Opportunity for talented Full Stack Software Engineer to join collaborative engineering team. This role will focus on design, architecture, and … implementation of software components as well as the overall solution, utilizing concepts, and best engineering practices of microservices architecture. As Full Stack Software Engineer you play an essential role in delivering new products and improvements to provide our customers and partners future proof, flexible and scalable solutions, while maintaining … and principles, utilizing concepts of clean architecture and clean code. Primary Responsibilities: Develop and maintain server-side and client-side applications using React, TypeScript, Java, Spring Boot, ensuring code quality, efficiency, and adherence to best practices. Design and implement scalable and efficient data structures and algorithms to optimize application More ❯

Mid Core Java Developer – London - 70k 💰 - Hybrid (London) 🏡 Our client is a highly trusted player in asset management and FX trading, looking to recruit a proficient Mid-Level Java Developer to join their apps team. This opportunity will allow you to join a company that is committed to … key role in the trading team.🔒 Work primarily within GCP, ensuring that the architecture is optimized for multi-cloud compatibility.⚙️ Key Requirements: An experienced engineer with 3-5 years of experience⭐ Strong knowledge of Core Java. 🌐 Previous experience working in TDD and CI/CD environment and pair-programming. … 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 ❯

Trading System Engineer/Architect – Shape the Future of Trading Leading European Private Bank The Front Office development team are responsible for the development of cross-asset automated pricing and risk systems, primarily focused on FICC derivatives. You will work directly with global sales/trading/quant teams … be instrumental in designing and implementing new systems. As a key member of the team, you will need: 8+ years’ experience as a software engineer delivering FO pricing/trading/risk solutions Ability to work with sales/trading/quant teams on implementing pricing/risk model … requirements Ability to work with eTrading/infrastructure teams on distribution of pricing/risk model outputs 8+ years' of strong Core Java knowledge, JDK 11+ 4+ years' of strong Python knowledge and enterprise level development experience Ability to develop high performance event-driven messaging systems Experience with 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 ❯

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 multiple industry … 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 ❯