Salary: £33,000 - 61,000 per year Requirements: Proven experience as a senior or principal UI engineer within complex, high-performance systems. Strong expertise in React, TypeScript, 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. Strong understanding of microservices architecture in cloud environments (desired). Strong grasp of database design and experience with relational and/or NoSQL databases (desired). Competent in using Docker for containerisation (desired). Familiarity with Kubernetes, relying on the DevOps Engineer for orchestration (desired). Proficiency in using Git for version control and JIRA for backlog management (desired). Experience with CI/CD pipelines and tools (desired). 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 prioritization 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. Technologies: AWS CI/CD Cloud CSS DevOps Docker Git HTML5 Support JIRA JavaScript Jest Kubernetes Material UI NoSQL Python React TypeScript microservices UX UI Design Network More: At TP ICAP, we are a world leading provider of market infrastructure, offering clients access to global financial and commodities markets. With a rich history dating back to 1866, we have built a strong reputation as the largest interdealer broker by revenue and a key player in the Energy & Commodities space. Our team of over 5,200 professionals across 60 offices in 27 countries works collaboratively to bring innovative solutions to our clients. We believe in fostering an inclusive culture where diverse perspectives can thrive and where each individuals contribution is valued. Join us in our Belfast office, where we provide a supportive and dynamic environment to help you grow and succeed. last updated 18 week of 2026