Madrid (Hybrid)Full-timeAbout FEROFERO 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.About the roleWe’re looking for a Full Stack Developer to join our Engineering team.You’ll help build and improve our next-generation checkout experience, working across our WooCommerce checkout plugin and Magento checkout module. You’ll develop modern React interfaces, contribute to PHP backend services, and help deliver seamless, high-converting checkout flows.We’re looking for someone with relevant professional experience who’s excited to grow as a Full Stack Developer. Whether your background is stronger in frontend or backend, you’re curious, adaptable, and eager to keep learning across the stack.What you’ll do- Build end-to-end features across frontend and backend.- Develop modern, responsive user interfaces using React, JavaScript, HTML, and CSS.- Build and maintain backend functionality using modern PHP.- Work on our WooCommerce checkout plugin and Magento checkout module.- Integrate frontend and backend through REST and GraphQL APIs.- Collaborate closely with engineers, product managers, and designers.- Write clean, maintainable, and testable code.- Continuously learn new tools, technologies,



and best practices.What you'll bring- Relevant professional experience building web applications.- Experience designing scalable systems.- Experience working across the stack, with a stronger background in either frontend or backend.- Strong problem-solving skills.- Ability to work collaboratively within an engineering team.Good to Have- Experience with modern PHP.- Experience with React, JavaScript, and TypeScript.- Experience working with eCommerce platforms.- Experience with REST or GraphQL APIs.- Familiarity with checkout or payment flows.Who you are- You’ve ideally worked in smaller teams.- You’re excited to learn new frameworks, tools, and technologies.- You have stronger experience in either frontend or backend and are motivated to continue growing across the full stack.- You like being close to the impact of your work. At our size, what you build reaches production and customers fast.- You’re happy wearing more than one hat when needed. In a team our size, ownership doesn’t stop at a narrow job description.- You’re comfortable when priorities shift as we learn. We’d rather ship, iterate, and improve than wait for perfection.What we offer- Permanent contract.- Private health insurance (partially covered).- Hybrid work (3 days office / 2 remote).- Office in a central location in Madrid.- Real growth opportunities.- High-impact, collaborative environment.Hiring Process- Screening call- Technical interview with the Hiring Manager- Final conversation#J-18808-Ljbffr

📌 Full Stack Engineer (Madrid)
🏢 Antler
📍 Madrid