Senior Frontend Developer
We are seeking a seasoned Senior Frontend Developer to lead the development of high-performance, scalable, and user-centric web applications.
This role demands a blend of hands-on coding expertise, architectural acumen, and leadership capabilities. You will be instrumental in setting technical direction, mentoring team members, and ensuring the delivery of top-tier frontend solutions.
* Key Responsibilities:
* Design and implement robust frontend architectures using React.js, ensuring scalability and maintainability.
* Develop and maintain reusable components and libraries to streamline development processes.
* Continuously monitor and enhance application performance, ensuring optimal load times and responsiveness.
* Work closely with UX/UI designers, backend engineers, and product managers to translate business requirements into technical solutions.
* Guide and mentor junior developers, encouraging a culture of continuous learning and improvement.
* Enforce best practices in code quality, testing, and documentation.
* Stay up to date on emerging technologies and advocate for their adoption when beneficial to the project.
Requirements
To be successful in this role, you will need:
* A minimum of 7 years in frontend development, with at least 3 years in a leadership or principal role.
* Expertise in React.js and its core principles, including state management (e.g., Redux, Context API), hooks, and lifecycle methods.
* Proficiency in testing frameworks such as Jest, React Testing Library, and end-to-end testing tools.
* Familiarity with modern build pipelines and tools.
* Experience with Git and collaborative workflows.
* Excellent communication skills, with the ability to articulate complex technical concepts to non-technical stakeholders.
* Flexibility: Expected to be in the office 1-2 days a month.
Technical Expectations
You will need to demonstrate:
* Expert-level proficiency in JavaScript, with an in-depth understanding of the JavaScript module system, including extensive knowledge of CommonJS and ES Modules, and how they operate within both Node.js and browser environments.
* Extensive experience developing complex applications using React.js, demonstrating detailed knowledge of React's rendering lifecycle, server-side rendering (SSR), hydration processes, and optimisation strategies.
* Proven expertise in Node.js, particularly in creating scalable and performant backend services, with a thorough understanding of asynchronous programming patterns, event-loop mechanics, and Node.js internals.
* Demonstrable hands-on experience using modern front-end build tools and bundlers (Webpack, Rollup, Vite).
* Comprehensive experience with modern testing tools and frameworks, such as Jest, Vitest, React Testing Library, Playwright, or Cypress, including writing robust unit, integration, and end-to-end tests, as well as establishing best practices for test coverage and continuous integration pipelines.
* Significant experience in optimising application performance, specifically focused on frontend and SSR performance improvements through effective use of code-splitting, hydration strategies, caching, and state management solutions.
* Familiarity and practical experience with current JavaScript language features (ES2020+) and tooling ecosystems (Babel, TypeScript).
* Proven ability to guide technical decision-making, mentor engineering teams, conduct rigorous code reviews, and uphold high standards for code quality, maintainability, and scalability.
Benefits
Alongside being challenged daily and a real interest in your development, you will also receive:
* Subsidized Sky HD package, broadband and discounted sky talk.
* Free Puregym membership.
* Free healthcare with Bupa, life assurance and income protection.
* Pension scheme with up to 9% contribution from the company.
* £1,000 training fund each financial year, to spend on your professional development.
* Unlimited holiday plan.