Build Seamless Checkout Experiences That Drive Conversion — Join Us in Madrid!
Are you a senior frontend developer passionate about crafting exceptional e-commerce checkout flows? At
FERO, we’re looking for a
Senior Frontend Developer
to lead the development of a next-generation checkout experience. You’ll design and build performant, user-friendly interfaces in
React, collaborate closely with backend teams, and ensure smooth integrations with e-commerce platforms and APIs that power our product.
Who We Are We're FERO, a high-growth startup reinventing the checkout and payment experience to help our customers increase conversion and revenue. Backed by top-tier VCs, we’re building our future from the heart of Madrid, combining cutting-edge tech with a collaborative, data-driven culture. We offer competitive pay, employee equity, and the chance to make a real difference in an environment that values curiosity, creativity, and impact.
What You'll Do Lead Frontend Development:
Architect and implement modern, responsive checkout experiences using
React, JavaScript, HTML, and CSS. Collaborate Across Teams:
Work closely with backend engineers (PHP/Symfony, Magento, WooCommerce), designers, and product managers to deliver seamless, high-performing user experiences. Integrate Systems:
Connect to backend APIs (REST, GraphQL), payment gateways, and shipping modules to ensure smooth and secure checkout flows. Maintain Quality:
Write clean, testable, maintainable code, applying best practices for performance, accessibility, and security. Optimise for Conversion:
Use data and UX best practices to improve checkout performance and conversion rates. Stay Ahead:
Keep up-to-date with the latest trends in React, frontend tooling, and e-commerce technology.
What We Offer Innovative Environment:
Work on cutting-edge solutions in a greenfield setting. Growth Opportunities:
Join us early and grow with us professionally and personally. Collaborative Culture:
Be part of a friendly, creative, and supportive team. Flexible Work:
Hybrid model - 3 days in office, 2 days WFH. Competitive Compensation:
Great pay, employee equity, and private health insurance partially sponsored by FERO.
Who You Are Experienced Frontend Developer:
5+ years of professional frontend development experience, with deep expertise in React and modern JavaScript. Backend-Aware:
Comfortable working with NodeJS + PHP-based backends and understanding systems like Magento 2 and WooCommerce (not a PHP coder, but you can read and collaborate on backend-related tasks). API Fluent:
Skilled at integrating with REST and GraphQL APIs. E-Commerce Enthusiast:
Familiar with checkout flows, payment system integrations, and UX best practices for e-commerce. Performance & Accessibility Focused:
You know how to build fast and accessible experiences. Collaborative & Proactive:
You enjoy working in a team and aren’t afraid to ask questions or speak up with ideas. Growth Mindset:
Always eager to learn and adapt to new technologies and challenges. Eligible to Work in Spain Excellent English: You are fluent in English, both written and spoken.
Ready to Join Us?
Excited to make a difference? Send us your English CV and let's get started on this amazing journey together!