Principal Engineer, Front-End Technologies

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.

As a Principal UI Engineer in Benchmarking and Indices Division for LSEG, the individual will have strong UI engineering and architecture experience. Potential candidate will be responsible to work closely with business to gain deep understanding of complex user journeys, workflows and data interactions involved in Index business lifecycle so to come up with outstanding user interfaces using modern UI technologies.

This role will report to Head of Engineering and is encouraged to work with both internal and external index business stakeholders and varied technology teams involving UI engineers/developers, Product Owners.

You will take ownership of establishing the technical standards, architectures, and front-end frameworks for a team of 10+ Engineers. You will ensure the seamless integration of microservices through REST APIs and push the boundaries of front-end development with advanced Angular features and modern web technologies. You will quickly deliver Proof of Concepts (PoCs), guide complex technical decisions, and drive discussions that elevate engineering capabilities across the organization.

• Lead UI engineering through proven experience, design and architect large-scale applications through modern front end technologies especially Angular
• Drive best practices in state management using NgRx or Akita or working with Business Process Automation (BPM) Engines specifically IBM BAW
• Architect efficient micro-frontends and ensure the seamless integration of microservices via REST APIs and GraphQL.
• Prior experience of efficiently migrate UIs from Silverlight framework to Angular

Design modular, reusable components and architect dynamic, data-driven applications using brand new technologies like WebAssembly and Web Workers for enhanced performance.

• Rapidly develop and deploy Proof of Concepts (PoCs) to test innovative ideas and methodologies in real-world scenarios.
• Implement robust testing strategies using Jasmine, Karma, Cypress, and automated E2E testing for high reliability.
• Set and enforce coding standards, unit testing, and CI/CD pipelines to ensure code quality and continuous delivery.
• Lead the adoption of emerging web technologies such as Progressive Web Apps (PWA), WebSockets, HTTP/2, and service workers to improve the user experience.

Actively engage in architecture reviews, providing leadership in decisions around microservices communication, front-end frameworks, and performance optimization.

• Foster collaboration and continuous learning, mentoring junior developers and driving the team toward engineering excellence.
• Maintain a forward-looking approach by researching and integrating modern front-end tools, techniques, and libraries to stay ahead in the ever-evolving landscape of web technologies.

• Over 15+ years proven experience as a Lead UI Developer, architecting large-scale applications through the evolution of Angular and prior technologies in enterprise environments is required.
• Extensive experience in RESTful API integration, microservices/microfront-end architecture, and familiarity with GraphQL.
• Strong understanding of front-end architectures with modularization, lazy loading, micro-frontends, and progressive improvements like PWA.
• Proficient in web technologies like Angular Universal (SSR), WebAssembly, and Web Workers for performance optimizations.
• Prior experience of efficiently migrate UIs from Silverlight framework to Angular

Demonstrated ability to rapidly develop and iterate Proof of Concepts (PoCs) with a focus on high-quality delivery.

• Excellent problem-solving skills and a strong understanding of complex technical architecture across the front-end stack.
• Solid experience in TypeScript, and Node.js.
• Strong leadership and communication, capable of mentoring teams, reviewing complex codebases, and setting technical direction.
• Strong experience of SQL

Bachelor’s or master’s degree or equivalent experience in computer science, Engineering, or a related field.

Experience with cloud based solutions and deployment on platforms like AWS

Prior experience of applications that got re-written from Silverlight to Angular

Familiarity with DevOps practices and tools such as Docker, Kubernetes, and CI/CD pipelines.

Hands-on experience with CI/CD pipelines, automated testing frameworks, and implementing continuous integration and delivery.

Strong and able communicator with creative outlook

Excellent Communication and Presentation Skills

Creative, results driven, self-motivated, and solutions oriented

Articulate, upbeat, able to work alone or as part of a team

Excellent attention to detail but an ability to think laterally to solve business problems

Excellent organization and time management skills

Experience of managing or influencing key decision makers

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.

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