Senior Full Stack Developer (PHP + Frontend)

At FERO, we’re looking for a Senior Full Stack Developer to lead the development of our next-generation checkout experience. You’ll build engaging, performant interfaces in React while collaborating with our PHP backend to deliver seamless checkout flows.

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.

• Lead End-to-End Features: Develop responsive checkout experiences using React, JavaScript, HTML, and CSS, integrated with PHP backends.
• Collaborate Across Teams: Partner with designers, engineers, and product managers to deliver top-notch user experiences.
• Integrate Systems: Connect to backend APIs, payment gateways, and shipping modules.
• Contribute to Backend Code: Enhance PHP backend logic to support frontend needs or integrations.
• Maintain Quality: Write clean, maintainable code with performance, accessibility, and security in mind.
• Stay Ahead: Keep up-to-date with React, frontend tooling, PHP, and e-commerce trends.

• Experienced Full Stack Developer: You enjoy working on both frontend and backend, comfortable with React (or a similar framework) and PHP.
• API Fluent: Experienced with REST or GraphQL APIs.
• Curious About E-Commerce: Interested in checkout flows, payment integrations, and online shopping systems (experience is a plus, but not required).
• Collaborative & Curious: Enjoys teamwork, learning new things, and bringing ideas to the table.
• Nice-to-Have: Experience with WooCommerce, Magento, or other e-commerce platforms.
• Fluent in English and eligible to work in Spain.

Don’t worry if you don’t check every box - we value curiosity, attitude, and willingness to learn!

• Innovative Environment: Work on greenfield projects and cutting-edge solutions.
• Growth Opportunities: Expand professionally and personally as we scale.
• Collaborative Culture: Join a friendly, supportive, and creative team.
• Flexible Work: Hybrid model – 3 days in office, 2 days remote.
• Competitive Compensation: Great salary, equity, and partial private health insurance coverage.

Excited to make an impact? Send us your CV in English and let’s build the future of checkout together!