Principal Engineer - UI Responsibilities: Lead and oversee UI design and development activities. Collaborate with product managers, UX designers, and backend engineers to create seamless user experiences. Make architectural decisions and establish design standards for UI components. Mentor and guide junior UI engineers to foster professional growth. Ensure the performance, quality, and responsiveness of applications. Stay updated with the latest UI technologies and industry trends. Integrate networking and cloud solutions into UI frameworks. Collaborate with DevOps teams to ensure smooth deployment and scalability of applications. Qualifications: 10 years of experience in UI/UX design and development. Proven experience with modern front-end frameworks such as React, Angular, or Vue.js. Strong understanding of HTML, CSS, JavaScript, and TypeScript. Excellent problem-solving skills and attention to detail. Strong communication and leadership skills. Experience with cloud platforms like AWS, Azure, or Google Cloud. Knowledge of networking protocols and security. Skills: React, Angular, Vue.js HTML5, CSS3, JavaScript, TypeScript Responsive Design Cross-browser Compatibility User Interface Design Version Control (Git) Cloud Computing (AWS, Azure, Google Cloud) Networking (TCP/IP, DNS, HTTP/HTTPS) Security (SSL/TLS, OAuth) This role is pivotal in ensuring that user interfaces are both aesthetically pleasing and highly functional, maintaining high standards of usability, performance, and security. 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.