Lead Engineer – C# .NET (AWS Cloud)

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 dedication 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, manage 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 65 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 values of Integrity, Partnership, Excellence and Change 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 rewarding 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 65 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 meaningful careers.

ROLE PROFILE: As part of our engineering team, you will lead design, build, and improve backend services using C# and .NET technologies within a fully AWS-based cloud environment. This role focuses on hands-on development, contributing to team decisions, and taking ownership of delivering reliable, scalable software.

You will work independently while collaborating with peers to improve system performance, reliability, and modern cloud engineering practices. ROLE SUMMARY: We are looking for a Senior Software Engineer with strong C# and .NET expertise to build and support backend systems running on AWS cloud platforms.

You will develop secure, scalable applications using Cloud services and contribute to improving system reliability, delivery speed, and team knowledge. This role plays an important part in building and operating cloud-native, event-driven applications at scale.

WHAT YOU'LL BE DOING: Lead design, develop, and maintain backend services using C# and .NET Build and integrate RESTful APIs including apply secure coding, testing, and deployment practices Develop and support applications in a fully AWS-based environment Work with container-based platforms (such as Kubernetes or Amazon Elastic Container Service (ECS)) Build event-driven solutions using messaging services Manage cloud storage for data and file management Contribute to CI/CD pipelines (GitLab) Guide and contribute technical decisions through code reviews and mentoring of team members Take ownership of features to ensure quality, reliability, and performance WHAT YOU'LL BRING: Essential skills and experience: Demonstrated ability to lead the design and building of scalable backend systems, with strong experience in Cloud technologies.

Strong experience with: C# and .NET (ASP.NET Core) Designing, building and working with APIs Working with Managed Databases (for example, Aurora PostgreSQL or similar relational databases) Good understanding of core Cloud concepts, including security, networking, scalability, and high availability Hands-on experience with AWS Cloud services, such as: Compute and container platforms (for example, EC2, Lambda, ECS, or Kubernetes-based environments) Storage solutions (for example, S3 or similar) Messaging services (for example, SNS, SQS) Monitoring and logging tools (for example, Cloud Watch) Experience working with container-based deployments (for example, Docker) Experience using GitLab or similar tools for CI/CD Strong debugging and problem-solving skills Ability to work effectively in Agile teams Clear communication and collaboration skills Desirable skills (nice to have): Exposure to microservices architecture Experience improving system observability and monitoring Understanding of application performance, scalability, and optimization in distributed systems WHAT YOU’LL GET IN RETURN: Opportunity to work on high-impact with Cloud-native systems at global scale A collaborative environment that supports learning and continuous improvement Opportunities to grow your technical and cloud expertise The chance to contribute to meaningful work that supports global financial markets We're proud to have been recognised as a Great Place to Work® in India ‘25.

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. 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.