Principal Software Engineer; UI

Position: Principal Software Engineer (UI)
Group Overview The TP ICAP Group is a world leading provider of market infrastructure.

Our purpose is to provide clients with access to global financial and commodities markets, improving price discovery, liquidity, and distribution of data, through responsible and innovative solutions.

Through our people and technology, we connect clients to superior liquidity and data solutions.

The Group is home to a stable of premium brands. Collectively, TP ICAP is the largest interdealer broker in the world by revenue, the number one Energy & Commodities broker in the world, the world’s leading provider of OTC data, and an award winning all-to-all trading platform.

Founded in London in 1866, the Group operates from more than 60 offices in 27 countries. We are 5,200 people strong. We work as one to achieve our vision of being the world’s most trusted, innovative, liquidity and data solutions specialist.

Role Overview The Principal UI Engineer serves as a senior technical authority within the UI engineering discipline, providing leadership across design, architecture, standards, and delivery. The role is hands‑on, focused on building scalable, high‑performance UI systems while mentoring engineers and influencing best practices across multiple teams. Operating within agile teams, the Principal UI Engineer sets engineering direction, supports architectural decision‑making, and ensures the delivery of high‑quality, robust UI solutions.

Role Responsibilities Lead the design and development of scalable, high‑performance UI applications.

Provide technical leadership and mentoring to UI engineers across teams.

Establish and maintain UI engineering standards, patterns, and best practices.

Oversee solution design, analysis, and implementation for complex UI systems.

Communicate architectural decisions to technical and non‑technical stakeholders.

Guide teams through estimation, planning, and prioritisation using established SDLC processes.

Drive continuous improvement initiatives to optimise UI performance, usability, and maintainability.

Identify opportunities to evolve systems toward target architecture and lead refactoring initiatives.

Support risk identification, escalation, and mitigation within engineering teams.

Design, develop, and maintain software, ensuring seamless integration and performance.

Collaborate with cross-functional teams, including Business Analysts (BAs) and Project Managers (PMs), to gather and refine requirements.

Implement and maintain Infrastructure as Code (IaC) using AWS CDK with Python to automate deployment and management of cloud resources.

Ensure high-quality code through automated testing, particularly unit testing, and maintain a strong emphasis on code quality and complexity.

Oversee the implementation and management of CI/CD pipelines to streamline the software development lifecycle.

Experience / Competences Essential Proven  experience as a senior or principal UI engineer within complex, high‑performance systems.

Strong expertise in React, Type Script, JavaScript, and modern UI development practices.

Experience with UI component libraries such as Material UI or Ant Design.

Proficiency in HTML5, CSS, and responsive design principles.

Knowledge of performance optimisation and profiling techniques.

Strong understanding of AWS services and hands-on experience with Infrastructure as Code (IaC), particularly using AWS CDK in Python.

Experience with Entity Framework (or other CRMs) is beneficial

Experience designing and building systems using a contract-first methodology is beneficial

Experience with writing tests or scripts in Python is beneficial

Familiarity with testing frameworks such as Jest and industry code‑quality tools.

Skilled in Git‑based source control and agile development methodologies.

Strong communication and collaboration skills, able to influence engineering direction.

Desired Strong understanding of microservices architecture in cloud environments.

Strong grasp of database design and experience with relational and/or No

SQL databases.

Competent in using Docker for containerisation.

Familiarity with Kubernetes, relying on the Dev Ops Engineer for orchestration.

Proficiency in using Git for version…