Lead Application Engineer

This is a hybrid role working 3 days in the office (City of London location) and 2 days working from home.

Role Purpose:

The role is focused on building and architecting complex UI systems using Blazor integrated with .NET APIs. The ideal candidate has experience designing scalable UI architecture for large enterprise or client-facing applications with modular components, dynamic views, and clear UI state and navigation planning. This role is not just about development—it's about owning the UI layer at a systems level, applying clean architecture, and delivering a user experience that’s visually polished and technically sound.

Responsibilities:

• Architect and implement modular, scalable reactive Blazor UI systems for a large client application with diverse and evolving feature sets.
• Translate business requirements and design files. Define UI layer patterns and best practices for state management, component communication, routing, and dynamic rendering.
• Work closely with backend developers on .NET APIs to align data integration with front-end flows.
• Plan for performance, maintainability, and reusability across components and screens.
• Collaborate with product designers and stakeholders to evolve UX with clarity and intent.
• Guide UI planning, prioritize accessibility, and enforce responsive design principles.
• Lead or contribute to best practise and technical decisions related to front-end structure, folder layout, dependency injection, and shared services.
• Design and develop integrations from third party systems using APIs to UTB back-office systems

Skills and Experience sought:

• 5+ years professional experience in .NET-based front-end development.
• 5+ years hands-on expertise in Blazor (Server and/or WASM).
• Proven experience architecting UIs for enterprise-scale or modular client applications.
• Deep knowledge of component-driven development, UI state management, layout systems, and SPA navigation.
• Solid experience working with REST APIs and .NET backends.

Equal Opportunities

We're an equal opportunity employer, which means we'll consider all suitably qualified applicants regardless of gender identity or expression, ethnic origin, nationality, religion or beliefs, age, sexual orientation, disability status or any other protected characteristic. We recruit and develop our people based on merit and we're committed to creating an inclusive environment for all employees. During the application process, you will be asked to complete an equality questionnaire on a voluntary basis and any data we collect will be treated confidentially and used for evaluation purposes. This will be for a period of 6 months or longer with your permission. This helps us understand our applicants so we can make sure we are doing everything we can to attract a diverse range of people and ensure our recruitment processes are fair and inclusive.