Senior Software Engineer (Full stack JavaScript

Position: Senior Software Engineer (Full stack JavaScript)
Location: Greater London

About UsLSEG (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. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.

LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific.

Role SummaryLSEG Workspace is our flagship financial platform - a Desktop, Web, and Mobile SaaS solution providing unparalleled insights across the full breadth of LSEG data.

Page Express is a business-critical content management and publishing platform that powers content experiences across LSEG Workspace. It enables internal users to create, manage, and publish pages, articles, and navigation that are consumed directly by Workspace users. The platform integrates with a wide range of data sources and components to deliver content-driven applications at scale, with both authoring capabilities (Page Express Admin) and customer-facing services that render and distribute content across the Workspace ecosystem.

We are looking for a highly skilled and motivated Senior Software Engineer to join Page Express team, as part of Workspace Engineering in Bucharest. Our team accelerates business innovation by crafting reusable solutions that support digital journeys, handle upgrade workflows and enable safe, gradual feature rollouts across user segments.

You will be responsible for front-end and back-end development. We are solution engineers with simplicity, consistency and reusability in mind first, and coding second. You’ll collaborate with software & quality engineers within our squad and across the business to build impactful capabilities across the customer digital journey.

What You’ll Bring Must have:5+ years of professional experience in software development

Proficiency in JavaScript, Type Script and Node.js Practical experience with front-end frameworks e.g. Angular, React

Experience with cloud platforms (Azure and AWS)
Prior experience with CMS solutions

Expertise developing REST API Experience with CI/CD pipelines and Dev Ops practices

Nice to have:

Exposure to serverless architecture and event-driven systems

Knowledge of security and compliance standards

Experience with Java What You’ll Be Doing Software Development Design, develop, and maintain web & desktop solutions ensuring scalability, security, and high performance

Write clean, efficient, well-tested and well-documented code Conduct code reviews and establish standard processes for software development

System Design and Architecture Architect, deploy, and run web & cloud-based applications

Optimise cloud infrastructure for cost-efficiency and performance

Lead architectural decisions for front-end and back-end systems, ensuring alignment with business goals and technical requirements

Collaborate with Product, Design, Dev Ops to build end-to-end solutions

Identify and resolve performance bottlenecks and system issues

Implement robust monitoring and alerting solutions

Project Management Participate in sprint planning, task estimation, and roadmap development

Ensure timely delivery of projects, meeting both technical and business objectives

Benefits

We are looking for intellectually curious people, passionate about the bigger picture of how technology industry is evolving, ready to ask difficult questions and deal with complicated scenarios! If you are creative and a problem solver, this is the place to be as will be supporting you…