Backend Developer (PHP)

📍 Madrid (Hybrid)

🕒 Full-time

FERO is reinventing checkout for eCommerce.

We build high-performance, adaptive checkout experiences that help merchants increase conversion and revenue.

Backed by top-tier VCs, we’re building from Madrid with a strong focus on performance, data, and real impact.

• Work on the most critical moment in eCommerce: checkout
• Everything you build directly impacts conversion and revenue
• Real ownership from early on
• Modern stack + real-world scale challenges
• Collaborative, ambitious, international team

We’re looking for a Backend Developer (PHP) to help us build and scale our next-generation checkout.

This is not a typical backend role — you’ll work closely with frontend, product, and design to deliver fast, seamless, and high-converting checkout experiences.

👉 We’re looking for someone product-minded, who cares about performance and user experience

• Build and improve backend systems powering checkout flows (PHP)
• Develop and maintain APIs (REST / GraphQL)
• Integrate with payment systems, eCommerce platforms, and third-party services
• Work closely with frontend engineers to deliver seamless user experiences
• Optimize performance, reliability, and scalability
• Contribute to improving conversion and reducing friction in checkout
• Take ownership of features from idea to production

• 2–5 years of experience in backend or full stack development
• Strong experience with PHP (Symfony or similar frameworks)
• Experience working with APIs (REST or GraphQL)
• Comfortable collaborating with frontend teams (React knowledge is a plus)
• Interest in performance, UX, and product impact
• Experience with eCommerce, payments, or checkout flows is a big plus

• Product-minded — you care about what you build and its impact
• You take ownership and like to see things through
• Detail-oriented and performance-focused
• Curious and eager to learn
• Comfortable working in a fast-paced startup environment

• Competitive salary + equity
• Private health insurance (partially covered)
• Hybrid work (3 days office / 2 remote)
• Real growth opportunities
• High-impact, collaborative environment

If you want to work on meaningful problems, improve fast, and see your impact — we’d love to meet you.

👉 Apply now and help us redefine checkout.