About Us

LSEG is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to perfection 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 build jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years.

Position Summary

We are seeking a skilled React.js Developer with 2+ years of experience to join our diverse team. The ideal candidate will have strong problem-solving abilities, a passion for building adaptable user interfaces, and experience working in agile environments. You will collaborate with cross-functional teams to develop and maintain high-performance web applications using modern JavaScript frameworks.  

Role Responsibilities

• Develop and maintain responsive, scalable, and high-performance web applications using React.js, Next.js, and TypeScript.  

• Collaborate with UI/UX designers, backend developers, and product managers to deliver flawless user experiences.  

• Write clean, reusable, and efficient code following best practices.

• Optimize applications for maximum speed and scalability.  

• Debug and resolve complex frontend issues with strong problem-solving skills.  

• Implement state management using Redux, Context API, or Zustand.  

• Work with RESTful APIs for data integration.  

• Conduct code reviews, testing (Jest/React Testing Library), and debugging.  

• Stay updated with emerging frontend technologies and industry trends.  

Preferred Skills and Experience

• A BS/BE degree in engineering and a minimum of 3-5 years of professional experience in React.js development.  

• Strong proficiency in JavaScript, TypeScript, HTML5, and CSS3/SASS.  

• Experience with state management.  

• Familiarity with RESTful APIs and async programming.  

• Experience with testing frameworks (Jest, React Testing Library) 

• Understanding of responsive design and cross-browser compatibility.  

• Strong problem-solving and debugging skills.  

• Experience with Git and Agile/Scrum methodologies.  

Nice to Have (Bonus Skills):

Knowledge of Next.js or other SSR frameworks.  

Familiarity with UI component libraries (Material-UI, Ant Design, Chakra UI).  

Basic backend knowledge (Node.js, Express, or Python).  

Experience with CI/CD pipelines (GitHub Actions, Jenkins).  

Understanding of Web Sockets or real-time applications.  

Knowledge of modern frontend build tools (Webpack, Babel, NPM/Yarn).  

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. You will be part of a collaborative and creative culture where we encourage new ideas and are committed to sustainability across our global business. You will experience the critical role we have in helping to re-engineer the financial ecosystem to support and drive sustainable economic growth. Together, we are aiming to achieve this growth by accelerating the just transition to net zero, enabling growth of the green economy and creating inclusive economic opportunity.

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

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.

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.