Java Developer (Blockchain)

London Stock Exchange Group; Greater London; On-site; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Healthcare

Retirement planning

Paid volunteering days

Wellbeing initiatives

Job summary

A leading financial markets infrastructure provider in Greater London is seeking a Senior Associate Engineer for Post Trade. The role involves building a cloud-based market infrastructure, focusing on engineering excellence, event-driven microservices, and advanced Java development. Candidates should possess strong skills in database management, cloud architecture, and agile methodologies. This position offers an opportunity to contribute significantly to innovative solutions while being part of a dynamic team committed to pioneering excellence in the financial sector.

Qualifications

• Strong understanding of microservices design and best practices.
• Experience with containerization and orchestration.
• Strong SQL knowledge and experience in relational databases.
• Hands-on use of AWS cloud-based services.
• Understanding of blockchain fundamentals and interoperability.

Responsibilities

• Engage deeply in technical design and implementation.
• Contribute to all stages of the product engineering life cycle.
• Promote collaboration and transparency within the team.
• Demonstrate ownership and pride in work.

Skills

Event driven microservices architecture

Advanced Java

Database Management

Cloud Architecture

Blockchain Integration

Agile Ways of Working

Tools

Docker

Kubernetes

GitLab

JUnit

Kafka

Job description

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.# Key ResponsibilitiesA 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# Key Skills and ExperienceEvent 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.# Key Behaviours* 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:**Senior Associate**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 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, .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.# Role ProfileLSEG (London Stock Exchange Group) 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 culture of connecting, creating opportunity and delivering excellence shapes how we think, how we do things and how we help our people fulfil their potential.