Senior Frontend Engineer

Location: Bucharest (Hybrid)
Department: Workspace Engineering
Role Type: Full-Time
Career Level: Senior Individual Contributor

LSEG (London Stock Exchange Group) is a diversified global financial markets infrastructure and data business. As an open-access partner to the world’s financial ecosystem, we deliver trusted market infrastructure, data solutions, and technology that enable our customers to fund innovation, manage risk, and grow with confidence.

With more than 300 years of heritage and operations across 70 countries, we offer stability, transparency, and deep expertise across global markets. Headquartered in the United Kingdom, LSEG employs over 25,000 people worldwide, with significant presence across Asia Pacific, EMEA, and the Americas.

We are seeking an experienced Senior Frontend Engineer to join our Workspace Engineering team. This role is responsible for designing, building, and optimising high‑performance, customer‑facing applications for the LSEG Workspace platform. You will work closely with product managers, UX designers, and engineering partners to deliver exceptional user experiences while contributing to architectural decisions and advancing engineering excellence across the organisation.

This is a hands-on engineering role with significant scope to influence frontend technology direction and mentor others.

• Design and implement high‑quality, scalable frontend applications using JavaScript, TypeScript, and modern frameworks.

• Deliver features end‑to‑end, including requirements analysis, technical design, implementation, testing, and deployment.

• Contribute to architectural decisions and frontend modernisation initiatives.

• Maintain high coding standards through code reviews, testing practices, and development automation.

• Work with Product and UX teams to translate business requirements into technical solutions.

• Collaborate with backend, QA, and DevOps teams to ensure seamless integration and reliable delivery.

• Communicate technical decisions, trade-offs, and progress clearly to stakeholders.

• Contribute to improving reliability, performance, observability, and scalability across applications.

• Diagnose and resolve complex technical issues.

• Support enhancements in tools, processes, and engineering best practices.

• Mentor junior and mid-level engineers, helping to grow technical capability within the team.

• Participate in technical hiring and team development activities.

• Promote knowledge sharing and engineering excellence across the Workspace organisation.

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.

• Expert proficiency in JavaScript, TypeScript, and modern frontend frameworks.

• Experience with full‑stack development (any modern backend framework or language).

• Proven experience delivering complex software products in Agile environments.

• Strong understanding of web performance, UI architecture, and accessibility.

• Excellent problem‑solving and debugging abilities.

• Strong communication skills, with the ability to work collaboratively with senior stakeholders.

• Experience working with distributed and cross‑functional engineering teams.

• Experience with major cloud platforms (AWS, Azure, or GCP).

• Familiarity with CI/CD pipelines, observability tooling, and cloud-native architecture.

• Experience building large-scale, data-rich or real‑time applications.

• Strong understanding of design systems and component-driven development.

• High emotional intelligence and strong collaboration skills.

LSEG is committed to creating an inclusive and diverse workplace. We welcome applications from all backgrounds and will consider flexible working arrangements where possible.

Career Stage:

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.