Web Developer

Noir; Swindon; Hybrid; GBP 45,000 - 65,000; Full time

Job summary

A leading SaaS company in the UK is seeking a Web Developer to enhance an existing .NET WebForms UI and migrate to modern stacks like MVC and React. This role emphasizes collaboration, technical craft, and innovation while offering a hybrid work model based in Swindon. Ideal candidates will have strong experience with .NET and React, ensuring performance and accessibility standards are met.

Qualifications

• Strong experience with .NET WebForms and ASP.NET MVC/Razor views.
• Proficiency in React including components, hooks, and state management.
• Hands-on experience with accessibility standards and semantic markup.

Responsibilities

• Maintain and enhance existing .NET WebForms UI while migrating to MVC and React.
• Build modern React components and features.
• Integrate with ASP.NET Core APIs ensuring data flows.
• Develop reusable component library and manage CSS architecture.
• Ensure accessibility and performance standards are met.

Skills

ASP.NET MVC

React

Accessibility standards

Performance tuning

Front-end testing frameworks

Modern front-end tooling

Communication skills

Job description

Overview

Web Developer – SaaS – Swindon (Hybrid, 3 Days in Office)

This role is for a Web Developer who can work across both legacy and modern stacks, maintaining and optimising an existing UI while helping to drive a structured migration to a next-generation front end.

This is a fantastic opportunity to join a stable, forward-thinking company that values technical craft, clean architecture, and collaboration.

Key Responsibilities

• Maintain and enhance an existing .NET WebForms UI while supporting a structured migration to MVC and React.
• Build modern React components and features (hooks, routing, forms, error boundaries).
• Integrate with ASP.NET Core APIs, ensuring resilient data flows and error handling.
• Develop and maintain a reusable component library and manage CSS architecture, responsive layouts, and theming.
• Ensure accessibility and semantic HTML standards are met.
• Optimise front-end performance, applying modern best practices.
• Implement client-side authentication flows and manage secure sessions.
• Write and maintain front-end tests covering key user journeys.
• Own and maintain front-end tooling and collaborate closely with backend developers, designers and PMs.

Skills & Experience

• Strong experience with .NET WebForms (pages, controls, lifecycle) and ASP.NET MVC/Razor views.
• Proficiency in React (ideally TypeScript) including components, hooks, and state management.
• Hands-on experience with accessibility standards (WCAG), semantic markup, and ARIA.
• Knowledge of performance tuning techniques including lazy loading, code splitting, and asset optimisation.
• Familiarity with front-end testing frameworks such as Jest, React Testing Library, Playwright or Cypress.
• Solid understanding of modern front-end tooling (e.g., npm/yarn, Vite/Webpack, ESLint/Prettier).
• Strong communication and collaboration skills across technical and non-technical stakeholders.

Nice to Have

• Exposure to Blazor or other component-based .NET front-end approaches.
• Experience with Storybook, SCSS architecture, or Tailwind.
• Knowledge of SEO, analytics, and internationalisation strategies.
• Practical experience with incremental UI migrations from legacy frameworks.

Location

Swindon, UK (Hybrid – 3 days in the office after probation)

Applicants must be based in the UK and have the right to work in the UK.

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