We make it possible for businesses to meet the ever-changing requirements of their industry and customer expectations. 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 Senior Software Engineer, you will design, develop, and maintain complex software components that align with business and technical requirements.

Your role will involve contributing to technical discussions, refining best practices, and supporting junior engineers through code reviews and knowledge sharing. Your expertise in programming and software engineering will be essential for achieving project goals and ensuring the delivery of high-quality products. Contribute to system architecture discussions and develop software components aligned with functional and non-functional requirements.

Creating high-quality, maintainable code in accordance with company best practices and standards. Participate in software testing, debugging, and optimization to ensure performance, scalability, and reliability. Develop and maintain cloud-based APIs, microservices, and integrations as part of a collaborative engineering team.

Support junior engineers through code reviews, pair programming, and sharing technical insights. Collaborate with the team to refine task prioritization and align work with project goals. Tackling complex problems requiring deep analysis and evaluation of diverse factors.

Share knowledge through documentation, workshops, or informal team sessions. Maintaining openness to communication with both local and external partners. DevOps, cloud services) to expand technical expertise.

Experience in designing and developing advanced software systems. Proficiency in object-oriented programming concepts, algorithms, and data structures.



Continuous focus on enhancing skills in software architecture design, and product development. Planning and managing complex multi-system deployments without impacting client operations. Ability to balance the demands of delivering high-quality software within tight deadlines. Programming across multiple languages (C#, JavaScript, Java in plus).

Experience with Agile methodologies and DevOps practices. Expertise in cloud infrastructure automation. Fluency in English is required for this role. C# .NET - Required RDBMS/SQL - Required TypeScript - Preferred Javascript - Preferred Amazon Web Services - Required Adaptable 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 global, 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!

📌 Senior Software Engineer - Data Technologies (Toledo)
🏢 Auctane
📍 Toledo