Principal Web Architect in London

Overview Reporting to the Director of Architecture within the Risk Intelligence team. Risk Intelligence is responsible for developing critical services that support anti-money laundering efforts in the financial markets. We’re looking for an ambitious Principal Web Architect to lead the evolution of our web platforms. This is a high-impact role where you’ll shape the technical direction of our web stack, mentor senior engineers, and ensure our tooling and frameworks are world-class. You’ll be instrumental in driving web innovation, ensuring code quality, and staying ahead of the curve in modern web development.
Main Responsibilities Architectural Leadership: Define and evolve the architecture of our web platforms to ensure scalability, performance, and maintainability.
Code Quality & Reviews: Conduct code reviews, establish best practices, and ensure adherence to architectural and coding standards.
Mentorship & Coaching: Guide and mentor senior engineers, fostering a culture of technical excellence and continuous learning.
Tooling & Developer Experience: Own and enhance the tooling ecosystem (CI/CD, linters, bundlers, testing frameworks) to streamline development workflows.
Framework Development: Contribute to and maintain shared frameworks and libraries that power our web applications.
Innovation & Research: Stay ahead of emerging trends in web technologies (e.g., edge computing, WebAssembly, server components) and assess their relevance to our stack.
Cross-functional Collaboration: Work closely with product, design, and backend teams to deliver cohesive and performant user experiences.
Skills/Experience Required Proven experience in architecting and developing web applications.
Deep expertise in modern JavaScript/TypeScript, React (or similar frameworks), and web performance optimization.
Deep understanding of software design patterns, SOLID, unit testing, locking, dependency injection and other essential engineering methods.
Strong understanding of frontend infrastructure, build systems, and deployment pipelines.
Experience coaching senior engineers and leading technical initiatives.
Passion for developer experience and tooling.
Ability to balance hands-on coding with strategic architectural thinking.
Ability to lead by example, influencing without direct authority, and communicate complex ideas clearly to technical and non-technical audiences.
Bonus Skills/Experience Experience with micro frontends, design systems, or federated architectures.
Familiarity with backend-for-frontend patterns and GraphQL.
Contributions to open-source projects or technical blogs.
Career Stage Manager
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 values are Integrity, Partnership, Excellence and Change, which underpin our purpose and guide our decision making and everyday actions.
We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of race, religion, color, 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.
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