Lead Software Engineer - St. Louis Office

LSEG; St. Louis (MO); On-site; USD 120,000 - 180,000; Full time

Job summary

London Stock Exchange Group (LSEG) is seeking a passionate Lead Engineer to help build robust, enterprise-grade solutions that drive real-world impact. You will mentor engineers and contribute to architecture, design, and performance optimization for scalable, AI-enabled analytics.

Join a global team of engineers delivering advanced data, AI and workflow solutions across regions, with a culture of curiosity, continuous learning and engineering excellence.

Qualifications

• 6+ years of experience with Java, Python, C++ or C#.
• Mentor and develop engineers, fostering excellence and innovation.
• Strong architecture, system design, scalability, reliability, and performance expertise.
• Experience driving AI-assisted engineering practices and evaluating emerging technologies.
• Strong CI/CD, unit testing frameworks, and cloud deployment (AWS/Azure).
• Curiosity about AI and how to apply new tech to software engineering.
• Bachelor's degree in Computer Science, Engineering or related field.
• Excellent problem-solving and proactive issue resolution.
• Willingness to learn across the full stack.
• Strong teamwork and cross-regional collaboration.

Responsibilities

• Help us build robust, enterprise-grade solutions that drive real-world impact.
• Mentor engineers and contribute to architecture, design and performance optimization.

Skills

Java

Python

C++

C#

Mentoring

Architecture

CI/CD

AWS

Education

Bachelor's degree in CS/Engineering

Tools

Cloud (AWS/Azure)

Job description

LSEG Data & Analytics is one of the world's largest providers of financial markets data and infrastructure. With over 40,000 customers and 400,000 end users across approximately 190 markets, we are an essential partner to the global financial community and redefining the future of data in financial services. We enable customers to draw crucial insights through data, feeds, analytics, AI and workflow solutions.

Our engineers design, develop and deliver the products and services that reimagine how our industry works. Driving innovation through digitalisation and AI, we deliver accelerated impact and excellence for customers every day.

The Opportunity

We are seeking a passionate Lead Engineer to help us build robust, enterprise-grade solutions that drive real-world impact.

Our problems are complex from building AI-powered analytics that are constantly evolving, to challenges that define modern finance, giving engineers the opportunity to stretch their craft and shape solutions that matter.

Our software engineers have a strong appetite for innovation, new technologies, and AI, both in how we accelerate engineering and in how we create smarter, more valuable experiences for our customers. We encourage curiosity, experimentation, and continuous learning, giving our teams the opportunity to solve complex challenges at scale.

What We Look For

We place great value on technical excellence and a drive for continuous learning.

• Experienced Software Engineers 6+ years of experience with one of the following technologies – Java, Python, C++ or C#

• Demonstrated ability to mentor and develop engineers, fostering a culture of technical excellence, continuous learning, and innovation.

• Strong expertise in software architecture, system design, scalability, reliability, and performance optimization for enterprise-grade applications.

• Experience driving the adoption of AI-assisted engineering practices and evaluating emerging technologies to improve developer productivity and product innovation.

• Strong experience with CI/CD, unit testing framework and automation (testing/deployment) in cloud platforms such as AWS or Azure

• Curiosity about AI and a strong interest in how emerging technologies can be applied to solve complex software engineering problems.

• Prior Financial Services or Big Tech experience preferred

• Bachelor's degree in Computer Science, Engineering and related field or relevant experience

• Excellent problem-solving skills and a proactive approach to identifying and resolving issues

• Willingness to learn and work with new technologies across the full stack

• Strong teamwork and communication skills, with the ability to collaborate optimally with cross-functional teams across multiple regions and timezones

Career Stage:

Manager

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 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.