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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Staff Frontend Developer - **Company:** Betway Global - **Location:** Barcelona, Spain - **Contract:** Permanent contract - **Skills:** Clean Code Principles, JavaScript (Programming Language), Architectural Patterns, Microsoft Azure, Code Review, Software Debugging, Github, Performance Tuning, Next.js, Software Engineering, Web Applications, Tailwind, ReactJS, Cypress (Programming Language), Backend, Material UI, Solid Principles, Information Technology, Cloudflare, Front End Software Development, React Testing Library - **Published:** July 29, 2026 - **Apply:** https://www.buscojobs.com.es/staff-frontend-developer-en-barcelona-ID-364380260 ## About the Role Bachelor's or master's degree in Computer Science, Software Engineering, or a related field. 7+ years of experience in software development, with at least 2 years in a technical leadership or mentorship role. Deep expertise in React, Next.js, and frontend architecture. Strong understanding of software design principles and architectural patterns. Excellent problem-solving and debugging skills. Proven ability to guide a team and coordinate work across multiple engineers. Strong communication and collaboration skills in English (both written and verbal). Enthusiastic about creating a culture of learning, feedback, and continuous improvement. Experience with frontend testing frameworks such as Jest, React Testing Library, or Cypress. Familiarity with Cloudflare (e.g., Workers, Pages, CDN services). Deep knowledge of performance optimization for modern web applications. Experience working with design systems or component libraries (e.g., Storybook, Tailwind CSS). Hands-on experience with CI/CD pipelines for frontend apps (e.g., GitHub Actions, Azure DevOps). Previous experience in fast-paced startup or scale-up environments. #J-*****-Ljbffr ## Description Staff Frontend Engineers (React / Next.js)We're looking for an experienced Front End Architect / Staff engineer to guide and support our frontend team as we build modern, high-performance web applications.You'll play a pivotal role in shaping the technical direction, mentoring engineers, and ensuring the delivery of scalable, maintainable, and performant software.What you'll do:Collaborate closely with product managers, designers, and backend engineers to define and deliver high-quality user experiences.Ensure adherence to best coding practices (e.g., SOLID principles, clean code, maintainable architecture).Perform code reviews, provide constructive feedback, and mentor engineers to support their growth.Drive continuous improvements in development processes, testing, and deployment.Take ownership of performance, scalability, and technical quality of the frontend codebase.Help evaluate and introduce new technologies, tools, and patterns to the team.Work hands-on with the codebase, especially on complex or high-impact features.What we're looking for:Bachelor's or master's degree in Computer Science, Software Engineering, or a related field.7+ years of experience in software development, with at least 2 years in a technical leadership or mentorship role.Deep expertise in React, Next.js, and frontend architecture.Strong understanding of software design principles and architectural patterns.Excellent problem-solving and debugging skills.Proven ability to guide a team and coordinate work across multiple engineers.Strong communication and collaboration skills in English (both written and verbal).Enthusiastic about creating a culture of learning, feedback, and continuous improvement.Experience with frontend testing frameworks such as Jest, React Testing Library, or Cypress.Familiarity with Cloudflare (e.g., Workers, Pages, CDN services).Deep knowledge of performance optimization for modern web applications.Experience working with design systems or component libraries (e.g., Storybook, Tailwind CSS).Hands-on experience with CI/CD pipelines for frontend apps (e.g., GitHub Actions, Azure DevOps).Previous experience in fast-paced startup or scale-up environments.#J-*****-Ljbffr ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [GraphQL + Apollo + Next.js: A Lovely Trio](https://www.wearedevelopers.com/videos/311-graphql-apollo-next-js-a-lovely-trio) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [From Zero to Hero: NextJS 13 and Tailwind CSS for Beginners](https://www.wearedevelopers.com/videos/766-from-zero-to-hero-nextjs-13-and-tailwind-css-for-beginners) - [Microfrontends at Scale](https://www.wearedevelopers.com/videos/236-microfrontends-at-scale) ## Related Articles - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [25 Essential Tools for Front End Developers](https://www.wearedevelopers.com/magazine/210-25-essential-tools-for-front-end-developers) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk)