Software Engineer, React

ROLE PROFILE:

Regulatory Reporting Solutions (RRS) is the London Stock Exchange's regulatory reporting, matching, and reconciliation solution provider. RRS customers include investment banks, hedge funds, brokers, and other financial services firms. RRS provides business solutions in the areas of:

• Regulatory reporting with MiFIR, EMIR, UKMIIR, G20, and other regimes

• Provision of reference data (especially financial instruments data)

• Analytics and Surveillance platforms that provide a suite of control frameworks

These services have seen year-on-year growth and are underpinned by a fully cloud-hosted applications suite. To build on this success and increase market share, we are looking to modernise and enhance these applications by delivering a modern UI, enhanced APIs, and scalable new functionality to meet evolving market demands.

ROLE SUMMARY:

RRS is seeking a React Engineer to contribute to the development of dynamic web applications using React.js. The Platform Engineering team develops, maintains, and enhances the core RRS platform that backs multiple regulated Tier 1 applications and solutions. A new greenfield project is being initiated to deliver the NextGen platform for RRS.

The successful candidate will contribute to the front-end development of high-performance, secure, and scalable financial platforms. As a core member of the development team, you will build intuitive and responsive user interfaces for applications that handle sensitive financial data, real-time analytics, and complex user workflows.

The role requires collaboration with cross-functional teams to deliver scalable, high-performance front-end solutions. This position is ideal for someone who thrives in a fast-paced environment and has a deep understanding of JavaScript/TypeScript, component-driven architecture, and modern front-end best practices.

This opening requires a candidate who takes great pride in delivering excellence with strong logical and technical skills, a can-do attitude, and a collaborative mindset, along with a desire to play a critical role in shaping an established platform and taking it on its next technology journey.

The culture of the RRS team is dynamic and requires each individual to adapt rapidly to change, contribute fully, and think on their feet.

WHAT YOU'LL BE DOING:

Key Responsibilities:

• Develop and maintain React applications with a focus on performance, security, and maintainability

• Write clean, modular, and reusable code using modern JavaScript (ES6+) and TypeScript

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

• Optimize application performance through efficient rendering and resource management

• Work alongside senior engineers, participate in code reviews, and follow best coding practices

• Troubleshoot and debug issues in a timely manner

• Stay up to date with emerging front-end technologies and propose improvements to processes and tools

Candidate Profile:

• 2+ years of experience in front-end development, with at least 1 year in React.js

• Strong proficiency in HTML5, CSS3, JavaScript (ES6+), and TypeScript

• Experience with state management libraries (Redux, MobX, Zustand, etc.)

• Understanding of RESTful APIs, WebSockets, and modern front-end build pipelines

• Experience with front-end performance optimization techniques

• Familiarity with testing tools such as Jest, React Testing Library, Cypress, etc.

• Experience deploying web applications using CI tools (e.g., GitLab) and build tools (e.g., Webpack, Vite, npm)

• Good awareness of SDLC considerations for Financial Services market infrastructure applications

• Provides L3 support for critical production issues

• Builds strong relationships with team members and collaborates closely with QA teams

• Shows interest in developing knowledge through on-the-job learning, certifications, and projects

Desirable Skills:

• Experience with cloud-native technologies (Azure or AWS)

• Experience with Snowflake data platform

• REST API design and development

• Docker, Kubernetes, or microservices application design

Behavioural Skills:

• Strong communication and collaboration skills across technical and non-technical teams

• Takes ownership and accountability for their actions and decisions

• Willingness to learn from and support team members

• Manages own workload effectively and promotes an open and inclusive

Career Stage:

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.