Java Developer - Blockchain

The successful candidate for the Engineer, Post Trade role, will be working with the Director Technical Delivery Solution and Delivery, will form part of a team building a complex, ground-up cloud-based critical market infrastructure service in a bold new venture for LSEG.  This opening requires a candidate who takes great pride in delivering excellence with excellent logical and technical skills and a can-do attitude combined with a helpful mentality, and a wish to play a critical role in forming and growing a new business.

A strong focus on engineering excellence and coding, adopting an open and hands-on approach to problem-solving and delivery. Engage deeply in technical design and implementation to ensure solutions are robust, scalable, and aligned with industry standards. Actively contribute to all stages of the product engineering life cycle—solutioning, design, coding, and testing—while promoting collaboration and transparency within the team to drive high-quality outcomes.

Demonstrate ownership and pride in work, proactively taking on new responsibilities aligned with product engineering needs. Embrace and apply LSEG engineering principles, diving deep technically to build with purpose and foster excellence within the team through open collaboration. Create an environment of engagement, challenge, and constructive questioning, ensuring trust and respect are maintained and a strong one-team mentality is upheld

Event driven microservices architecture

• Strong understanding of microservices design, including pitfalls and best practices.
• Knowledge of Domain-Driven Design (DDD) and event-driven architecture principles.
• Experience with containerization and orchestration using Docker and Kubernetes.
• Skilled in event-driven patterns for efficient and robust communication.
• Expertise in building and maintaining DevOps pipelines, ideally with GitLab.
• Proficient in shift-left testing using tools like JUnit, Cucumber, Gherkin, PACT, and Test Containers.
• Working knowledge of event/message brokers such as Kafka and MQ.

Advanced Java

• Strong experience in Object-Oriented Programming (OOP).
• Advanced knowledge of Java 17+ features and practical experience with Spring Boot.
• Skilled in developing RESTful services, including REST design principles, Swagger/OpenAPI, and Spring REST MVC.
•  Proficient in building and delivering enterprise-grade Java applications.
• Hands-on experience with data structures, algorithms, concurrency, and multi-threading.

Database Management

• Strong SQL knowledge with experience in relational databases such as Postgres.
• Working knowledge of object storage solutions, e.g., AWS S3.
• Familiarity with database version control tools like Flyway and Liquibase.

Cloud Architecture

• Experience working with major public cloud platforms, preferably AWS.
• Hands-on use of cloud-based services such as AWS Aurora, MSK, S3, and IAM.
• Basic understanding of cloud networking concepts.

Blockchain Integration and Interoperability

• Understanding of blockchain fundamentals, including consensus mechanisms and smart contracts.
• Knowledge of interoperability protocols
• Experience integrating blockchain solutions with existing enterprise systems.
• Familiarity with cross-chain communication and bridging technologies.
• Awareness of security considerations in blockchain integration (e.g., cryptographic standards, key management).
• Knowledge of token standard and transaction lifecycle.

Agile Ways of Working

• Strong understanding and commitment to the ethos of agile working.
• Experience working within Scrum and Kanban frameworks.
• Active participation in sprint ceremonies, including Product Backlog Refinement.
• Proven collaboration with cross-functional teams in scaled agile environments.

• Delivery-focused: Committed to meeting deadlines and managing stakeholder expectations.
• Accountable: Takes ownership and responsibility for outcomes.
• Collaborative: Works effectively within cross-functional teams and fosters teamwork.
• Communicative: Champions clear, respectful, and constructive communication.
• Quality-driven: Maintains high standards in code quality, testing, and CI/CD practices.
• Adaptable & Innovative: Eager to learn, improve, and embrace new technologies.
• Critical yet Respectful: Challenges ideas constructively while maintaining professionalism.
• Engineering Mindset: Passionate about solving problems and minimizing complexity.

Career Stage:

London Stock Exchange Group (LSEG) Information:

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.