Senior C++ Software Engineer

London Stock Exchange Group; Creve Coeur (MO); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Healthcare

Retirement planning

Paid volunteering days

Wellbeing initiatives

Job summary

London Stock Exchange Group (LSEG) is seeking a Senior Software Engineer in the U.S. to work on technically complex projects using Refinitiv technology and advanced C++ engineering.

The role emphasizes ownership, performance, and continuous learning in a global financial markets context. The candidate will join a team that values problem solving, collaboration, and delivery excellence while contributing to high-throughput, low-latency systems used across markets.

Qualifications

• 5+ years of full life-cycle software development experience.
• 3+ years of object oriented development in C++.
• Excellent communication skills (written and oral).
• Ability to collaborate in a team-focused environment.
• Strong analytical and problem-solving skills.
• Experience with test-driven development and automated testing.
• Willingness to explore new technologies and adapt quickly.
• Ability to interface with Technical Architects and Product Owners.

Responsibilities

• Implement performance and tuning modules for high throughput and reliability.
• Identify bottlenecks and bugs in code and devise solutions.
• Maintain code quality, design, and refactor to gain top performance.
• Ensure code quality with peer reviews and constructive feedback.
• Develop automated tests.
• Coordinate with QA and Operations for change controls and performance issues.
• Analyze KPIs and collaborate with cross-functional teams to improve performance.

Skills

C++

OO design

Linux

Agile

Automated tests

Multithreading

Low latency

Finance domain

Job description

ABOUT US

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a commitment to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, handle risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG’s ticker symbol is LSEG. Our People: People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and exciting experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential. We know that real personal growth cannot be achieved by simply climbing a career ladder – which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organization spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with relevant careers.

Role Summary

This role offers the opportunity to work on technically complex and engaging projects while developing expertise in proprietary Refinitiv technologies, domain-specific languages, and advanced C++ engineering. Successful team members are strong problem solvers who take full ownership of challenges and drive them through to resolution. The team fosters a culture of continuous learning, collaboration, and professional growth, providing ongoing support for skill development and innovation

What You will be Doing

• Implement performance and tuning modules for high throughput and reliability.


• Identify bottlenecks and bugs in codes and devise solutions to these problems.


• Maintain code quality, code design and re-factor to gain the best performance


• Ensure code quality with peer code reviews and providing constructive feedback.


• Develop automated tests.


• Oversee work efforts with the QA and Operations teams for application change controls and identify system performance issues.


• Analyze key performance indicators, liaise with Operations, cross function application teams to identify bottleneck and make improvements.

What You will Bring

• 5+ years of full life-cycle software development experience.


• 3+ years of object oriented development in C++.


• Superb communication skills (written and oral).


• Ability to collaborate in a team focused environment.


• Excellent analytical skills and a real passion for solving problems.


• Ability to thoroughly test and debug code using test driven development.


• Ability to suggest/research new technologies and quickly adapt to change.


• Ability to work with both Technical Architects and Product Owners in order to build to specification.


• Object oriented design.

Desired Skills

• Experience developing on Linux


• Exposure to Agile methodologies


• Experience with automated testing


• Experience of any integration with Oracle/SQL databases experience


• Knowledge of scripting languages Python, Unix or Powershell shell scripts desirable


• Knowledge of other languages such as JavaScript, Node.js


• Experience with real-time programming


• Adept at software design


• Experience with debugging multi-threaded applications


• Knowledge of/experience with design patterns


• Real passion for continued learning and development


• Understanding of financial markets, market data


• Low Latency financial market data systems

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.

Our sustainability initiatives and partnerships are highlighted through our LSEG Foundation and our 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.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

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.

Explore our divisions LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across Europe, the Middle East, Africa, North America, Latin America and Asia Pacific. Find out more Get to know some of our people who are pushing the boundaries of technology, finance and more around the world.