Senior Frontend Developer

💼 Senior Frontend Developer (React)

📍 Madrid (hybrid)

🕒 Full-time

👋 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, UX, and real impact.

🚀 Why join FERO?

Work on a product that directly impacts revenue

Own critical parts of the user experience

Modern stack + real performance challenges

Direct collaboration with product and engineering

Competitive salary + equity

Ambitious, international team

🎯 About the role

We’re looking for a Senior Frontend Developer to lead the development of our next-generation checkout experience.

You’ll design and build high-performance React interfaces, working closely with backend teams to deliver seamless, scalable checkout flows.

👉 This is a product-focused role where UX, speed, and conversion matter.

💥 What you’ll do

Lead frontend development of checkout experiences

Build modern, responsive interfaces using React, JavaScript, HTML, and CSS

Integrate with backend APIs (REST, GraphQL), payment systems, and eCommerce platforms

Collaborate with backend engineers, product, and design

Write clean, scalable, and maintainable code

Optimize performance, accessibility, and UX

Use data and best practices to improve conversion

🧠 Core requirements

5+ years of frontend development experience

Strong expertise in React and modern JavaScript

Experience integrating with REST and/or GraphQL APIs

Experience building high-performance web applications

Strong understanding of UX, performance, and accessibility

➕ Nice to have

Experience with eCommerce platforms (Magento, WooCommerce)

Exposure to payments or checkout systems

Familiarity with backend systems (Node.js, PHP)

Experience with experimentation / A/B testing

🧬 Who you are

Product-minded — you care about user experience and impact

Strong ownership — you take features from idea to production

Detail-oriented and performance-focused

Curious and always learning

Collaborative and proactive

🧭 What makes this role different

You’re not just building UI —

you’re working on the most critical moment in eCommerce: checkout.

Every improvement you ship directly impacts conversion and 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 environment

🧭 Hiring process

Application review

Intro call (15–20 min)

Technical interview (deep dive + practical discussion)

Final interview

Offer 🚀

⚡ Ready to build what really matters?

If you want to work on high-impact product challenges and push performance and UX to the next level — we’d love to meet you.

👉 Apply now and help us redefine checkout.