Build Seamless Checkout Experiences That Drive Conversion — Join Us in Madrid! Are you a senior developer passionate about crafting exceptional e-commerce checkout flows? At FERO, we’re searching for a Senior PHP Developer to lead the creation of a next-generation checkout experience on Magento. You’ll play a pivotal role in enhancing our customer experience, improving conversions, and helping our product grow smarter and faster. Who We Are We're FERO, a high-growth startup reinventing the checkout and payment experience to help our customers increase conversions 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 Checkout Development: Architect and develop a custom Magento checkout plugin with PHP (Symfony) and front-end technologies (React, Java Script). Collaborate Across Teams: Work closely with front-end developers, product managers, and backend engineers to deliver seamless, performant checkout experiences. Integrate Systems: Connect payment gateways, shipping modules, and third-party APIs securely and efficiently. Maintain Quality: Write clean, testable, and maintainable code, troubleshooting and resolving complex issues. Innovate Continuously: Stay current with Magento and front-end best practices to keep our platform cutting-edge. 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. Work From Anywhere in Spain Competitive Compensation: Great pay, employee equity, and private health insurance partially sponsored by FERO. Who You Are Experienced PHP Developer: 5 years of professional PHP development experience with a strong background in Symfony or comparable modern PHP frameworks (knowledge of Magento 2 or Woo Commerce is a big plus) Front-End Savvy: Familiar with React, Java Script, HTML, and CSS, with solid knowledge of front-end architecture and building performant user interfaces. E-Commerce Enthusiast: Experienced with checkout flows, payment system integrations, and e-commerce best practices. Knowledge of Woo Commerce is a plus. API Fluent: Familiar with REST and Graph QL APIs for smooth integration and data exchange. Security & Performance Focused: Strong understanding of Magento security, session management, and performance tuning. 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 Ready to Join Us? Excited to make a difference? Send us your English CV and let's get started on this amazing journey together!