Senior Java Developer

London Stock Exchange$100K — $130K *
Finance & Insurance
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • Degree or equivalent in Computer Science or Electrical Engineering
  • 10+ years in Core Backend Software Development
  • Strong skills in Algorithms and Problem-Solving
  • Expertise in CI/CD tools and automation
  • Experience with Performance Optimizations and JVM Profiling
  • Proficiency in Core Java and Python
  • Hands-on experience with Relational Databases (e.g. Oracle, SQL Server)

Responsibilities

  • Design, develop, and maintain complex Java and Python applications
  • Collaborate with global teams to deliver high-quality products
  • Engage in the software development lifecycle from requirements to deployment
  • Establish automated testing for application reliability
  • Lead project priorities and commitments
  • Conduct code reviews to ensure quality standards
  • Provide Level 3 production support and resolve issues

Benefits

  • Healthcare coverage
  • Retirement planning assistance
  • Paid volunteering days
  • Wellbeing initiatives
Full Job Description
Role Summary:

We are seeking a highly skilled and hands-on Senior Java Engineer with AI proficiency to help build the next generation FTSE Russell Index Platform. This platform underpins the calculation and distribution of FTSE Russell's global family of indexes and requires advanced engineering, high precision data processing, and deep collaboration across global teams.

This is a deeply technical role focused on designing, building, integrating, and operationalizing modern software and AI driven capabilities across internal platforms and client facing products. You will work with innovative technologies, contribute to complex algorithmic design, and drive engineering excellence in a high performance, data intensive environment.

What We're Looking For

A proactive, creative engineering leader who enjoys solving complex problems, working hands-on with modern technologies, and driving AI enabled innovation. If you're passionate about building resilient, intelligent, data intensive systems that power global financial markets, we'd love to hear from you.

What You Will be Doing:
  • Design, develop, and maintain complex Java and Python applications using modern engineering practices. Build / embed AI powered features into critical systems.
  • Architect and enhance services that support large-scale, performance critical index computations.
  • Collaborate with Product Managers, UX, and engineering teams globally to deliver high quality products.
  • Lead projects end-to-end through requirements, design, development, testing, deployment, and operations.
  • Build and maintain automated test suites to ensure performance, scalability, and security.
  • Diagnose production issues, identify root causes, and deliver Level 3 support and fixes.
  • Conduct peer reviews, provide technical leadership, and mentor junior engineers.
What You Will Bring:
  • 10+ years of hands-on backend software engineering experience.
  • Support the organisation's AI adoption journey.
  • Develop and enhance intelligent solutions using LLMs, LangChain/LangGraph, and agent AI frameworks.
  • Establish engineering guidelines for safe, scalable, traceable and production ready AI deployments across internal platforms and external product suites.
  • Strong algorithms, data structures, problem solving skills, and ability to translate business problems into scalable solutions.
  • Good command of coding standards and Strong understanding of both high level and low level software design
  • Expertise in:
  • Core Java, Python.
  • Building highly distributed, data intensive systems.
  • Microservices, REST APIs.
  • RDBMS (Oracle/SQL Server/Postgres).
  • CI/CD tools (Jenkins/GitLab), DevOps automation.
  • Docker, Kubernetes.
  • JVM profiling & performance optimisation.
  • Prior exposure to Level 3 production support.


Preferred Skills & Experience:
  • Excellent Algorithm and Problem-Solving skills.
  • Ability to convert business use cases and problems into technical solutions.
  • Ability to learn quickly, creative, results driven, self-motivated, and solutions oriented.
  • Ability to work against tight objectives.
  • Demonstrates a can-do demeanour, leads change, thinks strategically.
  • Experience in CI/CD tools & automation e.g., Jenkins/GitLab/similar DevOps tooling.
  • Experience working on Performance Optimizations, JVM Profiling.
  • Mentor team of junior developers
  • Extensive hands-on experience in:
  • Core Java, good understanding of Data Structures and Algorithms
  • Python core concepts and proficiency with its libraries and framework
  • Relational DB for e.g. (Oracle /SQL server /Postgres SQL)
  • DevOps (CI/CD)
  • Docker, Kubernetes
  • Microservices and REST APIs.
  • Good Understanding of Multi-threading & Concurrency.
Nice to have:
  • Experience leading or mentoring a team of engineers.
  • Experience within financial services or with financial market data.
  • Familiarity with in-memory caching, Spring Boot, Redis, Kafka.
  • Experience with BDD frameworks such as Cucumber, JBehave, or Karate.
  • Background as a Scrum Master or experience running Agile teams.

About London Stock Exchange

London Stock Exchange Careers

There has never been a better time to join the global team at London Stock Exchange, a leading financial marketplace renowned for its robust growth, innovation, and leadership in the financial sector.

Work You’ll Do

Join London Stock Exchange's market-leading team to help drive the future of financial markets. At the intersection of finance and technology, the company offers a unique position in the marketplace, fostering digital innovation and industry expertise. Professionals at London Stock Exchange work with a dynamic team of business and technology advisors, helping clients and the market navigate through complex financial landscapes with cutting-edge solutions. Collaborate with some of the most talented financial experts in the industry—professionals dedicated to advancing the state of financial markets and services.

Introducing the London Stock Exchange Professional Growth and Development Initiative

The initiative is building a market-leading team to propel London Stock Exchange to new heights, focusing on digital transformation and financial innovation.

Do Innovative Work

Engage in groundbreaking work with London Stock Exchange, where job opportunities abound for pushing the boundaries of financial technology and services.

Drive Innovation and Leadership

Deliver targeted financial solutions through a depth and breadth of consulting experience and innovation that’s second to none. London Stock Exchange is a place where leadership and diversity training meet to create a powerhouse in financial services.

Be Part of a Great Team

Join a team that values diversity and is committed to creating an inclusive culture. London Stockage Exchange offers a wide range of benefits and a culture that fosters professional growth and networking opportunities.

Future-proof Your Career

With London Stock Exchange, career advancement is limitless. The company supports professional growth with unmatched training, development, and certification support.

Explore Job Opportunities and Internships

From internships to leadership positions, London Stockage Exchange offers a variety of roles for individuals at every stage of their career. The company is continuously hiring, seeking passionate, curious, and innovative team players.

The London Stock Exchange Commitment to Professional Development

With a commitment to professional development and employment diversity, London Stock Exchange ensures that all team members have the resources and opportunities to thrive in their careers.

Stay Connected

Join the Team

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