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Java Developer; Blockchain

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: London Stock Exchange Group
Full Time position
Listed on 2026-07-25
Job specializations:
  • Software Development
    Backend Developer, Java Developer
Salary/Wage Range or Industry Benchmark: 80000 - 120000 GBP Yearly GBP 80000.00 120000.00 YEAR
Job Description & How to Apply Below
Position: Java Developer (Blockchain)
Location: Greater London

Role Profile

The successful candidate for the Engineer, Post Trade role will work with the Director Technical Delivery Solution and Delivery. You will be 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 strong logical and technical skills, a can‑do attitude, and a willingness to play a critical role in forming and growing a new business.

Key Responsibilities
  • 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—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 Experience
  • Event‑driven microservice architecture
    : strong understanding of microservices design, pitfalls, best practices, Domain‑Driven Design (DDD), event‑driven principles, Docker, Kubernetes, and event‑driven patterns.
  • Dev Ops and testing
    : building and maintaining pipelines (Git Lab preferred), shift‑left testing using JUnit, Cucumber, Gherkin, PACT, Test Containers, and knowledge of Kafka, MQ.
  • Java expertise
    : advanced experience with Java 17+, OOP, Spring Boot, RESTful services, Swagger/OpenAPI, Spring MVC, enterprise‑grade Java applications, data structures, algorithms, concurrency, and multi‑threading.
  • Database management
    : strong SQL skills with Postgres, familiarity with object storage (AWS S3), database version control (Flyway, Liquibase).
  • Cloud architecture
    : experience with AWS (Aurora, MSK, S3, IAM) and basic cloud networking concepts.
  • Blockchain integration
    : understanding of blockchain fundamentals, consensus mechanisms, smart contracts, interoperability protocols, cross‑chain communication, and security considerations.
  • Agile working
    : commitment to agile principles, experience with Scrum and Kanban, sprint ceremonies, product backlog refinement, and collaboration 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, fostering 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

Benefits
  • Healthcare
  • Retirement planning
  • Paid volunteering days
  • Wellbeing initiatives
Equal Opportunity

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.

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