Full Stack Developer

👋 About FERO

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.

🚀 Why join FERO?

Work on a product that directly impacts revenue

Real ownership from early on

Modern stack + real-world scale challenges

Direct collaboration with product and engineering

Competitive salary + equity

Ambitious and international team

🎯 About the role

We’re looking for a Full Stack Developer to help us build and scale our next-generation checkout.

You’ll work across the stack — building React-based interfaces and contributing to PHP backend systems powering real eCommerce transactions.

👉 This is a product-focused role where performance and UX really matter.

💥 What you’ll do

Build end-to-end features across frontend and backend

Develop responsive interfaces using React, JavaScript, HTML, and CSS

Integrate with backend systems (PHP) and APIs (REST, GraphQL)

Work with payment systems, checkout flows, and eCommerce integrations

Collaborate with engineers, product, and design

Write clean, maintainable, and scalable code

Optimize performance, accessibility, and UX

Use data and best practices to improve conversion

🧠 Core requirements

2+ years of experience as a Full Stack Developer

Experience with React and modern JavaScript

Solid PHP knowledge (APIs, backend logic, integrations)

Experience working with REST and/or GraphQL APIs

Basic understanding of eCommerce systems or checkout flows

➕ Nice to have

Experience with WooCommerce or Magento

Exposure to payments or checkout systems

Understanding of performance optimization

Interest in UX and conversion

🧬 Who you are

Product-minded — you care about what you build

Eager to learn and grow quickly

Detail-oriented and quality-focused

Collaborative and proactive

Comfortable in a fast-paced environment

🧭 What makes this role different

You’re not just building features —

you’re working on the most critical part of eCommerce: checkout.

What you ship has a direct impact on revenue.

💼 What we offer

Competitive salary + equity

Private health insurance (partially covered)

Hybrid work (3 days office / 2 remote)

Real growth opportunities

Collaborative, high-performance team

🧭 Hiring process

Application review

Intro call (15–20 min)

Technical interview (practical + experience deep dive)

Final interview

Offer 🚀

⚡ Ready to grow fast and build real products?

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