Principal Java Architect

ABOUT US:
LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It's how we've contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.

LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG's ticker symbol is LSEG.

OUR PEOPLE:
People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and rewarding experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential.

We know that real personal growth cannot be achieved by simply climbing a career ladder – which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organisation spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers.

ROLE SUMMARY:
Reporting to the Director of Architecture within the Risk Intelligence team. Risk Intelligence is responsible for developing critical services that support anti-money laundering efforts in the financial markets.

We're looking for a Principal Java Architect to lead the design, evolution, and governance of our Java-based platforms. This is a hands-on, high-impact role where you'll shape the future of our backend architecture, coach senior engineers, and ensure our engineering practices and tooling are world-class. You'll be a key influencer in our technology strategy, driving innovation while ensuring robustness, scalability, and maintainability.

WHAT YOU'LL BE DOING:

• Architectural Leadership: Define and evolve the architecture of our Java platforms, ensuring alignment with business goals, scalability, and long-term maintainability.
• Code Quality & Reviews: Perform technical reviews, enforce clean code principles (e.g. SOLID), and ensure adherence to architectural standards.
• Mentorship & Coaching: Guide senior engineers and technical leads, fostering a culture of engineering excellence, autonomy, and continuous learning.
• Event-Driven & Domain-Driven Design: Champion modern architectural paradigms such as event-driven systems, DDD, and microservices.
• Tooling & Developer Experience: Own and enhance the Java development ecosystem—including build tools (Maven/Gradle), CI/CD pipelines, static analysis, and testing frameworks.
• Framework & Codebase Contribution: Contribute to and evolve shared libraries, frameworks, and platform components that power our services.
• Innovation & Research: Stay ahead of the curve on Java ecosystem developments (e.g. Project Loom, GraalVM, Kotlin, Quarkus) and lead strategic adoption.
• Cross-Functional Collaboration: Work closely with product, architecture, and platform teams to deliver cohesive, performant, and secure solutions.

WHAT YOU'LL BRING:

• Deep Java Expertise: Spring/Spring Boot, and the broader JVM ecosystem.
• Architectural Mastery: Strong grasp of software architecture patterns (e.g. hexagonal, layered, microservices), DDD, and event-driven systems (Kafka, Pulsar, etc.).
• Engineering Excellence: Mastery of SOLID principles, design patterns, dependency injection, and ORMs (e.g. Hibernate, JPA).
• Tooling Fluency: Experience with Gradle/Maven, CI/CD (e.g. Jenkins, GitLab), static analysis tools (e.g. SonarQube), and test automation.
• Optimisation Mindset: Good knowledge of algorithms, being able to quickly understand runtime complexity and offer alternative implementation. Good knowledge of data structures, understanding query patterns and being able to offer SQL and NoSQL solutions with appropriate scalable indexes.
• Cloud-Native Thinking: Experience writing software for cloud platforms (AWS, GCP, or Azure), including containerization (Docker, Kubernetes) and observability.
• Security & Resilience: Understanding of secure coding practices, fault tolerance, and system resilience in distributed environments.
• Leadership & Influence: Ability to lead by example, influencing without direct authority, and communicate complex ideas clearly to technical and non-technical audiences.

PREFERRED SKILLS/EXPERIENCE:

• Experience with reactive programming (e.g. Project Reactor, RxJava).
• Exposure to GraphQL, gRPC, or API gateway patterns.
• Experience with building agents or using Agentic frameworks such as LangChain4j, Embabel or equivalent.
• Contributions to open-source projects or technical blogs.

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of
Integrity, Partnership
,
Excellence
and
Change
underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone's race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it's used for, and how it's obtained, your rights and how to contact us as a data subject.

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.