Lead Software Engineer (Java/C++/Rust)

Join Our Global Development Team and Build Technology That Powers the World’s Leading Banks!

About the Project:

Are you passionate about crafting high-performance systems that connect global markets? Our FX Trading Aggregator enables flawless access to liquidity for top banks and traders worldwide. This is your opportunity to work on a critical platform trusted across the globe. It offers flexible execution management and venue choice, delivering market prices in milliseconds. Our Java-based software runs on hundreds of ser vers across data centers in the U.S., Europe, and Asia— providing real-time, low-latency access to global liquidity. Your Impact You’ll be part of a team that provides end-to-end support for the Aggregator application—from build and development to maintenance and production solving. While we follow Agile practices, we stay ready to respond quickly to urgent production issues when needed.

Requirements – What We're Looking For

• Strong software engineering experience with two languages out of three -Java/C++ and/or Rust.
• AI-first mindset — ability and willingness to effectively leverage AI-assisted development tools to improve productivity, software quality, troubleshooting, documentation, testing, and operational excellence.
• Solid understanding of software design, object-oriented programming, and distributed systems concepts.
• Strong SQL skills and experience working with relational databases.
• Good Linux knowledge, including troubleshooting, scripting, and system operations.
• Ability to design, build, and support highly available, scalable, and performant applications.
• Experience troubleshooting production issues and willingness to participate in production support and incident resolution.
• Ownership mentality with a pragmatic and problem-solving approach.
• Strong communication and teamwork skills.
• Team leadership and mentoring abilities, with the capability to lead technical discussions, coordinate work, and help develop team members.
• Ability to learn and adapt quickly to new technologies, programming languages, and architectural patterns. While Java is the primary language today, future work may involve technologies such as Rust or others as business needs evolve.
• Familiarity with Agile development methodologies.

Desirable Skills

• Experience with event-driven systems, and distributed architecture.
• Familiarity with cloud platforms and containerized environments.
• Exposure to CI/CD, DevOps practices, and infrastructure automation.
• Understanding of UDP multicast to build low latency systems.
• Experience with messaging technologies such as Kafka, Solace, Tibco, or RabbitMQ.
• Understanding of low-latency and high-performance systems.
• Experience with automated testing frameworks and quality engineering practices.
• Financial services, trading, or market connectivity experience.

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.

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