Java jobs in United Kingdom

Posted today

Location: London (Hybrid)

Salary: Up to £160,000 + Bonus + Comprehensive Benefits

The Role

A top-tier FinTech innovator is seeking a skilled Java Engineer to help drive the evolution of their next-generation, low-latency trading platform. This is your opportunity to work at the forefront of real-time financial technology, building performance-critical systems in a collaborative, agile environment.

You'll work alongside exceptional engineers and industry veterans, tackling complex challenges with Core Java in a business where every millisecond matters.

What You’ll Bring

Greater London, London Understanding Recruitment

Posted 7 days ago

Java Software Engineer – Asset Management Software

Approximately 2 days a week in Central London office.

A central London-based company, who are building trading software for the asset management and hedge fund industry, are looking for a Java Software Engineer to join them on their mission. This scale-up is a spin-out from one of the largest UK born global asset managers.

They are looking for a Java Software Engineer with the following:

• Multithreading, concurrency and high-throughput experience
• AWS/Public Cloud experience with DevOps tools
• An advocate for modern methodologies including TDD, pair-programming and CD

Tech: Core Java, Multithreading, Concurrency, AWS, DevOps, ActiveMQ/MongoDB, Kafka

The role will suit a Java Software Engineer with a strong enthusiasm to work in a fast-paced, financial environment and who has a natural interest in the trading industry. Day-to-day, you will be building distributed, low-latency systems and will be working in a team where there is a strong ethos of pair-programming. Relevant training is offered to the Java Software Engineer if they come from a non-financial background.

Apply now for more information on this opportunity

Posted today

Java software Engineer - London Reference Code: 270079-en_GBContract Type:PermanentProfessional Communities: Software Engineering

About the job your considering

You’ll be joining a passionate, professional and highly skilled team of developers who specialise in agile custom software development and integration at an enterprise scale. Innovation in delivery is always at the forefront of our minds, which is why we utilise a variety of Open Source and proprietary technologies to achieve the best possible outcome for the client.
We have a world class software engineering community; we invest in doing things right and have plenty to say on the subject. We’re active on social media and for those that want to find out more, take a look at our blogs – written by engineers, for engineers:

Hybrid working: The places that you work from day to day will vary according to your role, your needs, and those of the business; it will be a blend of Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time.

If you are successfully offered this position, you will go through a series of pre-employmentchecks, including:
identity, nationality (single or dual) or immigration status, employment history going back 3 continuous years, and unspent criminal record check (known as Disclosure and Barring Service)

Your role

• You will be a hands-on technical expert helping us deliver projects in a true DevOps manner. You will apply a software engineering mindset to problems, whether that’s provisioning services, writing code or writing automation tools and scripts.
• You will have a lean mindset, striving to build reliable and performant services that are operationally sound. You will strive to do things better and faster, eliminating waste and applying this across the entire software delivery lifecycle for both internal customers and end users.

You can bring your whole self to work. At Capgemini equity, diversity and inclusion is part of everyday life, and will be part of your working reality. We have built an inclusive and welcoming environment, for everyone.

Your skills and experience

What you’ll bring:
• Experience of Java
• Experience of Spring framework or equivalent.
• Knowledge of software design patterns and when to apply them
• Excellent knowledge of development processes.
• Experience of containerisation using Docker or Kubernetes
• Experience of Continuous Integration (CI) and Continuous Delivery (CD)
• A passion for delivering quality code, by use of TDD and setting high software quality standard

We’re also using the following technologies and patterns, it would be great if you had some of the skills, if not we can help develop them:
• Designing microservice-based architectures using domain driven design (DDD). CQRS and Event Sourcing patterns
• Kubernetes
• Knowledge/Certification in Spring framework.
• Experience in cloud technologies AWS/Azure/GCP
You will be required to pass through Security Clearance if you are successful in this recruitment process, which is a condition of undertaking the role.
Please ensure you are aware of the requirements before submitting your application

Your Security Clearance

To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance.
To obtain SC clearance, the successful applicant must have resided continuously within the United Kingdom for the last 5 years, along with other criteria and requirements.
Throughout the recruitment process, you will be asked questions about your security clearance eligibility such as, but not limited to, country of residence and nationality.
Some posts are restricted to sole UK Nationals for security reasons; therefore, you may be asked about your citizenship in the application process.

What does \'Get The Future You Want\' mean to you?

You will reimagine what’s possible: creating value for the world’s leading organisations through technology to build a sustainable, more inclusive future. You will work with a range of clients all with a unique set of business, technological and societal ambitions, which will make a real impact across the UK.
You will be empowered to explore, innovate, and progress. You will benefit from Capgemini’s ‘learning for life’ mindset, meaning you will have countless training and development opportunities from thinktanks to hackathons, and access to 250,000 courses with numerous external certifications from AWS, Microsoft, Harvard ManageMentor, Cybersecurity qualifications and much more.
You’ll be bringing your unique skills and perspectives to the team, inspiring and taking inspiration from your teammates as you unlock value in everything you do. You’ll be joining a professional community of experts, who have got your back and will support you, every step of the way.

Why you should consider Capgemini

Growing clients’ businesses while building a more sustainable, more inclusive future is a tough ask. When you join Capgemini, you’ll join a thriving company and become part of a diverse collective of free-thinkers, entrepreneurs and industry experts. We find new ways technology can help us reimagine what’s possible. It’s why, together, we seek out opportunities that will transform the world’s leading businesses, and it’s how you’ll gain the experiences and connections you need to shape your future. By learning from each other every day, sharing knowledge, and always pushing yourself to do better, you’ll build the skills you want. You’ll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.

About Capgemini

Capgemini is a global business and technology transformation partner, helping organizations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fuelled by its market leading capabilities in AI, cloud and data, combined with its deep industry expertise and partner ecosystem. The Group reported 2023 global revenues of €22.5 billion.

Greater London, London Quant Capital

Posted today

Quant Capital is urgently looking for a Core Java Developer to join a well known trading firm. No experience of finance is needed, finance isn’t what this firm does, tech is.

Our client is an innovative tech driven trading (Equities and ETF’s) company with a pioneering new concept for the financial markets with their big data technology platform. They have assembled a top team from across the financial markets and are looking to expand to meet high demand from clients. Their trading capital is in the order of multi millions not 3 guys in a shed.

The role:

This role and would suit a candidate with 3-5 years of Java Development experience. The successful candidate will be a top tier Java developer (or aspiring, half of the team don’t have a comp sic degree) with a passion for solving engineering problems and delivering business functionality. The role will involve design and implementation with real input into business offerings. The work that you will do will have a visible impact and will help define the future of the product. This opportunity is unique and will allow you to be involved in shaping the future of financial technology.

The environment will be agile, fast paced and test driven. You will be encouraged to evangelise and prototype new technologies and approaches to help shape the evolving architecture.

The successful candidate must be:

• Experienced in Core Java
• Highly motivated
• Delivery focused and accountable.
• Ideally experienced in server side multi-threaded Java – if you haven’t been siloed in a big firm then don’t worry.

Additional exposure to the following is desired : - Tech Stack you will learn

• Hadoop and Flink
• Involvement in the Java community

My client is based London. Home work is encouraged but you will need to be able to come to the City if needed.

Posted 46 days ago

Permanent

About Us:

Solirius Reply, part of the Reply Group, delivers technical consultancy and application delivery to our clients in order to solve real world problems and allow our clients to respond to an ever-changing technical landscape. We partner closely with our clients, embedding our consultants into their businesses in order to provide a bespoke service, allowing us to truly understand our clients’ needs.

It is this close collaboration with our clients that has enabled us to grow rapidly in recent years and will drive our ambitious future growth plans. We currently have over 300 consultants working with a variety of key clients from both the public and private sectors such as the Ministry of Justice, Department for Education, FCDOS, UEFA, International Olympic Committee and Mercedes Benz; with plans to increase our client base further in the near future.

We operate as a flat organisation and believe in trusting and supporting our team to operate independently. We pride ourselves on being specialists at what we do, making the most of our consultants’ expertise in their fields in order to provide a best-in-class service to our clients. All our consultants have the opportunity to work on a range of different projects, providing a broad range of knowledge on which to develop their careers and progress in the direction they choose.

About You:

You are a motivated and adaptable professional with a strong analytical mindset and a passion for using technology to solve real-world problems. You enjoy working in collaborative, agile teams and take pride in delivering high-quality solutions that make a tangible impact. With strong communication skills and a consultative approach, you’re comfortable engaging with clients, understanding their needs, and translating them into effective outcomes. You understand and align with Solirius Reply Values.

The Role:

This is an exciting opportunity to join our Software Engineering Practice as a Full Stack Engineer, to work alongside our team and help build out the capability.

Requirements

Key Responsibilities:

• Working across the full lifecycle from requirement gathering and design, through to coding and into testing, deployment and maintenance.
• Liaising with management and stakeholders on client requirements and understanding team objectives.
• As a consultant with Solirius you will have exposure to a variety of projects and challenges
• Championing and contributing towards engineering best practises across our team and projects.

Key Skills/Experience:

You need to be technically sound but also be able to convey your knowledge and expertise to clients internally and externally. In terms of specific languages you should have commercial experience in some or all of the following;

• Substantial experience as a hands- on Full Stack Engineer
• Java 7/8 to current
• Applied knowledge of front end frameworks (Angular, React, other similar)
• Spring framework or Jax-RS, Jax-WS, JPA
• Rest, Hibernate, Docker, Terraform, GitHub, Jenkins, development and deployment in a cloud environment
• SQL
• TDD/BDD
• Experience of working with cloud infrastructure (Azure or AWS, GCP is beneficial)
• Experience in unit testing frameworks (Karma, Jasmine or others)

Package and Benefits:

• Bonus Scheme
• 25 Days Annual Leave + Bank Holidays
• Up to 10 days allocated for development training per year
• Enhanced Parental Leave
• Paid Fertility Leave (5 Days)
• Statutory & Contributory Pension
• EAP with
• Flexible Working
• Annual Away Days/Company Socials

Equality & Diversity:

Solirius Consulting is an equal opportunities employer. We are committed to creating a work environment that supports, celebrates, encourages, and respects all individuals and in which all processes are based on merit, competence and business needs. We do not discriminate on the basis of race, religion, gender, sexuality, age, disability, ethnicity, marital status or any other protected characteristics.

Should you require further assistance or require any reasonable adjustments be put in place to better support your application process, please do not hesitate to raise this with us.

Posted 2 days ago

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 silver and gold.

As a Software Engineer you'll collaborate with the Lead Engineer on the core 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 Agile team environment.

WFH Policy:

You'll join the team in the West London office with flexibility to work from home twice a week.

About you:

• You are degree educated, having achieved a 2.1 or above gained in Computer Science (or similar STEM discipline) from a top tier university (e.g. Russel Group) backed by A's at A-level
• You have strong Java and Kotlin development experience
• You have experience with Agile processes and TDD
• You have a thorough understanding of Computer Science fundamentals such as OOP, Design Patterns, Data Structures, Algorithms
• Other tech in the stack includes Scala, React, Spring, Oracle, Redis, Kubernetes, Docker and Linux so previous exposure to any of these would be beneficial
• You're collaborative with good communication skills

What's in it for you:

As a Software Engineer / Developer you will earn:

• Salary to £85k
• Bonus
• Hybrid working (x3 days in London per week)
• Learning and career development opportunities

Apply now to find out more about this Software Engineer / Developer (Java 17 Kotlin AWS) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Posted 7 days ago

Backend Software Engineer / Developer London onsite to £160k

Are you a Java technologist with strong knowledge of software engineering best practices and backend development experience looking for an opportunity to progress your career in a senior, hands-on role with complex and challenging work?

You could be joining a scaling Cyber Security technology company that has just received £00 million investment.

As a Backend Software Engineer you'll join a small, Agile team using core Java within a TDD environment deploying to AWS. You'll design and develop new features and enhancements across two security product areas, working across the full development lifecycle; you'll be able to input ideas and have your voice heard in a collaborative team environment that encourages knowledge sharing.

Location:

You'll join colleagues in amazing offices in London five days a week with a wide range of facilities and an array of perks including free, chef cooked meals.

About you:

• You have strong backend core Java development skills
• You have a strong knowledge of software engineering best practices and have experience with TDD
• You have a good knowledge of SQL and Networking (TCP/IP)
• You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Algorithms, Design Patterns
• You're collaborative, with Pair Programming experience
• You enjoy problem solving and are keen to pick up new skills

What's in it for you:

As a Backend Software Engineer / Developer you will earn a highly competitive package including:

• Salary to 60k
• Life Assurance and Income Protection
• Enhanced paternity packages
• Private Medical care for you and your family including same day GP appointments and prescriptions
• Charitable donations matching scheme and much more

Apply now to find out more about this Backend Software Engineer / Developer (Java TDD) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

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Location

Posted today

QA Engineer (Hybrid, 2 days working from the London office)

We are looking for a highly skilled and experienced QA Engineer with a strong focus on both automation and manual testing to join our in-house development team.

We build cutting-edge and innovative web applications for the gambling industry; we have a fully Responsive Web product developed with Angular JS. This role offers an excellent opportunity for an experienced QA Engineer eager to drive automation testing for our DotCMS-based project while supporting manual testing efforts. We’re looking for a passionate and proactive individual who can ensure our online betting/casino web application and its CMS meets high standards of quality and functionality. This is a hybrid role between automation and manual testing, ensuring both efficiency through automation and comprehensive coverage through manual testing.

Experience/Technical Skills:

• At least 5+ years of experience with UI automation using Java + Selenium and as Manual QA
• Experience with Cucumber or a similar BDD framework
• Experience with CI/CD, preferably with Jenkins
• Strong analytical, diagnostic, and problem-solving skills with the ability to work independently
• Excellent knowledge of QA methodologies and processes with demonstrated QA experience (automated and manual testing)
• Experience working as a Manual QA Engineer, testing web and mobile web applications
• Experience testing web applications using debugging tools such as Chrome DevTools
• Familiarity with DotCMS or other CMS platforms is required
• Excellent communication and collaboration skills

Preferred:

• Experience testing of online gambling products ie Sportsbook and Casino games
• Experience working with content management systems (CMS)
• Experience with performance testing and load testing tools such as JMeter

What you’ll be doing:

• Develop and maintain UI automated tests for the DotCMS project
• Improve/refactor the testing automation framework
• Write clean code that adheres to software engineering best practices, with a focus on scalable and maintainable test execution infrastructure
• Analyse automated test run results and report issues and defects to the development team
• Test newly developed features as well as regression testing of our casino and betting website to ensure a high quality of software for release
• Maintain and update testing documentation as necessary
• Work closely with the development team to ensure that issues are resolved promptly
• Ensure software product quality through both manual and automation testing
• Identify automation opportunities to enhance efficiency and reduce manual testing efforts

This role offers an exciting opportunity for a QA professional to focus on automation for a CMS-based project while still handling manual testing responsibilities. If you are passionate about delivering high-quality software and thrive in a fast-paced, dynamic environment, we’d love to hear from you.

Posted 7 days ago

Lead Backend Software Engineer / Developer (Java Kafka SpringBoot) London / WFH to £120k

Are you a skilled Backend Software Engineer with strong Java and real-time messaging experience combined with SC Clearance?

You could be progressing your career in a senior, hands-on Lead Backend Software Engineer position at a scale-up technology company with a successful workforce management solution used within the government, defence and other public sector clients.

As a Lead Backend Software Engineer you will take a lead role in designing and developing secure, event driven, distributed backend systems for real-time operations, resilience and extensibility. You'll collaborate with engineers across the full stack to integrate backend services with Identity and Access control frameworks such as Keycloak, apply observability best practices and contribute to system architecture and codebase quality through reviews and mentoring.

Location / WFH:

You can work from home most of the time, meeting up with colleagues in the London office once a week.

About you:

• You have significant experience as a backend focussed Java software engineering with leadership responsibilities
• You have strong Spring Boot, Kafka and event driven microservices experience with high throughput
• You have leadership, mentoring and coaching skills
• You have a strong understanding of system-level concerns: observability, availability, resilience
• You have experience working within security-conscious, regulated, or mission-critical domains
• You are proficient working with CI/CD pipelines, Infrastructure-as-Code principles and containerised environments
• Please note : You must have SC Clearance (or ability to achieve it - i.e. you must be a British citizen with the past 5 years continually based in the UK) and be DBS checked due to the nature of the project / client

What's in it for you:

As a Lead Backend Software Engineer you will receive a competitive package:

• Salary to £120k
• Hybrid working with only one day a week in London office
• Impactful role with excellent career progression

Apply now to find out more about this Lead Backend Software Engineer / Developer (Java Kafka SpringBoot) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

East London, London SR2 | Socially Responsible Recruitment | Certified B Corporation

Posted 2 days ago

Java / Python Systems Engineer | Kafka | Java | Python | Outside IR35 | Remote
Federated Data Sharing | Secure Messaging | Government | ASAP Start

SR2 is supporting a central government programme that’s delivering a federated data-sharing solution across multiple departments. We’re looking for two experienced Distributed Systems Engineers to assess, enhance, and implement secure data exchange capabilities within a complex cross-organisational environment.

This is a high-impact, Outside IR35 role for engineers confident working with large-scale messaging systems and secure information sharing.

Key Responsibilities:

• Evaluate the current data federation architecture and propose areas for technical improvement
• Design and implement a scalable, secure federated data-sharing solution across government teams
• Collaborate closely with stakeholders to test and deploy distributed data solutions
• Contribute to system architecture, performance tuning, and delivery planning

Tech Stack & Skills Required:

• Apache Kafka – implementation, optimisation, distributed messaging
• Java – enterprise-grade service development
• Python – scripting, integration, and automation workflows
• Understanding of secure data flows and distributed information systems

The Details:

• 2x positions available
• £600-625/day (Outside IR35)
• Start date: ASAP
• Contract duration: 6 months+
• Remote

If you're a hands-on engineer with strong Kafka, Java, and Python skills — and want to help shape the way government shares data securely — apply now for immediate consideration.