Build Seamless Checkout Experiences That Drive Conversion — Join Us in MadridFERO, we're looking for aSenior Frontend Developerto lead the development of a next-generation checkout experience. You'll design and build performant, user-friendly interfaces inReact, collaborate closely with backend teams, and ensure smooth integrations with e-commerce platforms and APIs that power our product.Who We AreWe'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 DoLead Frontend Development :
Architect and implement modern, responsive checkout experiences usingReact, 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 OfferInnovative 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 AreExperienced 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 SpainFluent in both written and spoken EnglishReady to Join Us?Excited to make a difference? Send us your English CV and let's embark on this amazing journey together
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