We make it possible for businesses to meet the ever-changing requirements of their industry and customer expectations. The Auctane family of mailing and shipping software products includes ShipStation, Stamps.Our partners include Amazon, UPS, USPS, eBay, BigCommerce, Shopify, WooCommerce, and Walmart. As a Software Engineer, you will play a key role in building web applications, with an emphasis on frontend experience and reliable backend integrations.

You will be responsible for leading projects, participating in strategic technology decision-making, and mentoring less experienced team members. Your expertise in building responsive user interfaces and software engineer will be essential for achieving project goals. You will collaborate with cross-functional teams to streamline data flow, optimize application performance, and ensure high-quality product delivery.

Designing system architectures and developing complex software components while considering both functional and non-functional requirements. Creating high-quality software code in accordance with industry best practices and standards. Managing software testing processes, identifying and resolving issues, and optimizing client-side and system performance and scalability.

Building responsive user interfaces and scalable frontend applications adhering to the highest engineering standards. Mentoring junior team members by providing technical support, guidance, and sharing knowledge and experience to facilitate their professional growth. Tackling complex problems requiring deep analysis and evaluation of diverse factors.





Collaborating closely with other departments, such as UI/UX, product, and production teams, and management, to ensure solution consistency and compliance. Maintaining openness to communication with both local and external partners.

Experience in designing and developing advanced web applications and software systems. Proficiency in object-oriented programming concepts, frontend state management, algorithms, and data structures. Continuous focus on enhancing skills in software architecture design, modern web performance, DevOps practices, and product development.

Planning and managing complex web application and multi-system deployments without impacting client operations. Ability to balance the demands of delivering high-quality software within tight deadlines. Programming across multiple languages (including React or any other component-oriented JS framework and any backend languages).

Experience with Agile methodologies, responsive web design, and DevOps practices. Understanding of cloud infrastructure automation and client-side rendering. Proficiency in English is required for this role.

The tech stack React (or any other component-oriented JS framework)



- Required TypeScript - Required C# .NET - Preferred RDBMS / SQL - Preferred Amazon Web Services - Preferred Flexible salary benefits Save on personal income tax with Cobee for expenses like transport, restaurants, and kindergarten. Private health insurance Free for all employees via Cigna , plus we cover 50% for your family members . Generous time off Enjoy 26 days of holiday per year (23 base days + your birthday off , Christmas Eve, and New Year’s Eve).

Your gear, your choice Whether you prefer Mac or Windows , or need an extra screen, we’ll make sure you’re set up for success from day one. Grow your skills We offer up to €2000/year in training (certifications, conferences, workshops) to boost your growth—both technical and personal. Learning resources Access internal and external training , including platforms like LinkedIn Learning , completely free.

Holistic wellness program Includes access to Wellhub, Curalinc (psychological support), Rocketlawyer (legal advice), and regular health webinars & challenges. Volunteer day Take one day off a year to volunteer and give back. Bonus points for sharing pics on Slack!

Weekly language classes Improve or learn a new language (English, Spanish, French, Italian, or German) in small groups with expert instructors—on us! A integral, multicultural team We’re made up of 20+ nationalities , speaking 10+ languages . All communication is in English, so everyone’s included.

Central

Madrid office When you want a change of scenery, drop by our office in the heart of Madrid— free snacks and drinks included ! LI-HYBRID #

📌 Internship in Software Engineering (Madrid)
🏢 Auctane
📍 Madrid