About us
At Auctane, we are united by a passion to help businesses deliver — whatever their size, wherever they are, and however they operate. We make it possible for businesses to meet the ever-changing requirements of their industry and customer expectations. Auctane products enable hundreds of thousands of businesses to annually mail and ship billions of items — over $200 billion worth — to recipients around the globe.
The Auctane family of mailing and shipping software products includes ShipStation, Stamps.com, ShipStation API, Metapack, GlobalPost, and Packlink. Our partners include Amazon, UPS, USPS, eBay, BigCommerce, Shopify, WooCommerce, and Walmart.
Our values
Win as One. Delight Customers. Deliver Great Outcomes.

About the role
As a Senior Software Engineer, you will design, develop, and maintain complex user-facing applications and supporting backend services that align with business and technical requirements. You will take ownership of end-to-end feature implementation, optimizing client-side performance, accessibility,



and user experience while ensuring robust API integration and data flow. You will troubleshoot technical challenges across the full application stack and collaborate with cross-functional teams (including UI/UX designers, product managers, and backend engineers) to deliver scalable, responsive solutions. Your role will involve contributing to technical discussions, refining best practices for modern frontend architecture and service integration, and supporting junior engineers through code reviews and knowledge sharing.
We encourage our teams to embrace AI and make the most of our Claude Enterprise license to work smarter, experiment, and unlock new possibilities. We’re looking for a Senior Software Engineer who actively advocates for AI, is curious about its potential, and knows how to leverage AI tools to enhance their work, solve problems, and drive greater impact.
This role is based in Madrid.
What will you be doing?
- Contribute t

📌 Senior Software Engineer (España)
🏢 Auctane
📍 España