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:

- Lead the technical design, architecture, and implementation of frontend features using React, Next.js, and modern JavaScript/TypeScript.
- 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.

Bonus points for:

- 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.

📌 Staff Frontend Developer (Barcelona)
🏢 Betway Global
📍 Barcelona