Senior Front-End Developer (React)

Job Description

Responsibility:

• Lead the technical design and development of complex frontend features and applications using React.

• Write clean, well-documented, and testable code following best practices and coding standards.

• Collaborate closely with product managers, designers, and backend engineers to define and implement user interfaces and features.

• Integrate frontend applications with backend APIs and services.

• Optimize applications for maximum performance, scalability, and responsiveness.

• Participate in code reviews, providing constructive feedback to team members.

• Mentor and guide junior frontend developers, fostering their technical growth.

• Stay up to date with the latest frontend technologies, trends, and best practices.

• Contribute to the continuous improvement of our development processes and tools.

• Troubleshoot and resolve frontend-related issues.

Qualifications

• Proven track record of 5+ years of professional experience in frontend development.

• Extensive and deep expertise in React and its core principles.

• Solid understanding of JavaScript (ES6+), HTML5, and CSS3.

• Experience with modern frontend build tools and workflows (e.g. npm/yarn, Webpack, Babel).

• Experience with RESTful APIs and asynchronous data handling.

• Familiarity with testing frameworks (e.g., Jest, React Testing Library, Cypress).

• Experience with version control systems (e.g., Git).

• Excellent problem-solving, communication, and collaboration skills.

• Strong communication skills and ability to collaborate in a remote-first environment.

• Good in English (Spanish is a plus)

• Nice to have knowledge of Fintech or payments-related development.

Additional Information

Why Join Us:

• Flexible work environment (hybrid or fully remote in the Spain).

• Opportunity to work with cutting-edge technologies in a fast-growing fintech startup.

• Strong engineering culture with a focus on quality, scalability, and innovation.

• A supportive, diverse, and dynamic team that values growth and learning.

• Work on a product that makes a real social impact on financial well-being.