Frontend Engineer at Catawiki in Lisbon, Portugal (hybrid). Join one of Catawiki’s main Development Verticals—Demand, Supply or Fulfilment—and help improve the experience for buyers, sellers, and internal teams across the platform. You’ll work alongside Backend, Frontend, iOS and Android Engineers, QA, UX Designers, and Product Managers, with the support of a Tech Lead Manager, to create beautiful, adaptable web frontends on top of scalable microservices. While your product area may vary, your goal remains the same: deliver reliable, high-quality experiences that have meaningful impact for users.

What you’ll do: - Build impactful product experiences by delivering innovations across the platform for buyers, sellers, customer service, and internal operations teams. - Create adaptable web frontends on top of scalable microservices using TypeScript and ReactJS. - Deliver responsive, accessible experiences across desktop, tablet, and mobile. - Optimise product performance by measuring and monitoring systems, using insights to improve experiences. - Experiment and learn by partnering with Product Managers and UX Designers on A/B tests, using data to validate ideas and iterate. - Collaborate across disciplines with engineers, QA, design, and product colleagues to build scalable and maintainable solutions.

What you’ll bring: - A Senior Frontend Engineer with extensive frontend experience in JavaScript/TypeScript; a strong portfolio of frontend deliveries. - Strong web foundations: HTML, CSS, JavaScript/TypeScript; understanding of HTTP/S, the Critical Rendering Path,

Frontend Engineer at Catawiki in Lisbon, Portugal (hybrid). Join one of Catawiki’s main Development Verticals—Demand, Supply or Fulfilment—and help improve the experience for buyers, sellers, and internal teams across the platform. You’ll work alongside Backend, Frontend, iOS and Android Engineers, QA, UX Designers, and Product Managers, with the support of a Tech Lead Manager, to create beautiful, adaptable web frontends on top of scalable microservices. While your product area may vary, your goal remains the same: deliver reliable, high-quality experiences that have meaningful impact for users.

What you’ll do: - Build impactful product experiences by delivering innovations across the platform for buyers, sellers, customer service, and internal operations teams. - Create adaptable web frontends on top of scalable microservices using TypeScript and ReactJS. - Deliver responsive, accessible experiences across desktop, tablet, and mobile. - Optimise product performance by measuring and monitoring systems, using insights to improve experiences. - Experiment and learn by partnering with Product Managers and UX Designers on A/B tests, using data to validate ideas and iterate. - Collaborate across disciplines with engineers, QA, design, and product colleagues to build scalable and maintainable solutions.

What you’ll bring: - A Senior Frontend Engineer with extensive frontend experience in JavaScript/TypeScript; a strong portfolio of frontend deliveries. - Strong web foundations: HTML, CSS, JavaScript/TypeScript; understanding of HTTP/S, the Critical Rendering Path,