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Software Engineer - Integrations (Java)

Auctane

As a Software Engineer, you will be responsible for designing, developing, testing, and supporting enterprise integrations. This role will partner with business stakeholders, architects, developers, and operations teams to build scalable, secure, and reusable APIs and integrations that enable critical business processes across the ShipStation Global ecosystem.

This role is based in Madrid, Spain

About Auctane

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.

Win as One. Delight Customers. Deliver Great Outcomes.

We’re committed to recognizing your professional growth. Every year, we review salaries to reflect your individual development, achievements, and impact on our business success.

A global, multicultural team

We’re made up of

20+ nationalities

Responsibilities

  • Design, develop, test, deploy, and maintain integrations.
  • Build and support API-led connectivity solutions utilizing System, Process, and Experience APIs.
  • Develop integrations utilizing REST APIs, SOAP Web Services, EDI, XML, JSON, flat files, and database technologies.
  • Implement event-driven and asynchronous integration patterns using messaging technologies.
  • Collaborate with architects and technical leads to define integration standards, best practices, and reference architectures.
  • Participate in requirements gathering and technical design sessions with business and technology teams.
  • Develop and maintain DataWeave transformations for data mapping and orchestration.
  • Troubleshoot production integration issues and participate in root cause analysis activities.
  • Support CI/CD pipelines and automated deployment processes.
  • Monitor and optimize integration performance, reliability, and scalability.
  • Conduct peer code reviews and ensure compliance with development standards.
  • Create and maintain technical documentation, API specifications, and operational runbooks.
  • Work closely with infrastructure and security teams to ensure secure integration implementations.
  • internal and external training, including platforms like
  • Includes access to Wellhub, Curalinc (psychological support), Rocketlawyer (legal advice), and regular health webinars & challenges.
  • Volunteer day
  • Take
  • Because your mental health matters.

Requirements

  • 3+ years of software development experience and 2+ years of experience developing integrations.
  • Experience building RESTful APIs and web services, API design and API lifecycle management.
  • Experience implementing integrations using XML, JSON, XSD, and DataWeave.
  • Experience working with relational databases and SQL.
  • Experience integrating cloud applications.
  • Experience with Git-based source control systems.
  • Experience supporting CI/CD pipelines and automated deployments.

Experience troubleshooting complex distributed systems

  • Strong analytical and troubleshooting abilities.
  • Excellent verbal and written communication skills in both Spanish and English
  • Ability to work effectively with business and technical stakeholders.
  • Strong organizational and time-management skills.
  • Ability to manage multiple priorities in a fast-paced environment.
  • Critical thinking and problem-solving capabilities.
  • LinkedIn Learning

Preferred

  • MuleSoft Developer Certification (Mule 4).
  • MuleSoft Integration Architect certification.
  • Experience with AWS, S3, and SQS or hybrid cloud environments.
  • Experience with EDI transactions and B2B integrations.
  • Experience with Salesforce, ERP, CRM, TMS, or transportation/logistics systems.
  • Experience with monitoring tools such as Datadog, Splunk, or similar platforms.
  • Experience supporting enterprise-scale integration platforms.

Benefits

  • Clear and transparent compensation plan.
  • 40,000 € to 52,000 €. We will discuss the indicated range with you in the first recruiting call to ensure that we are on the same page.
  • Save on personal income tax with Cobee for expenses like transport, restaurants, and kindergarten.
  • Free for all employees via Cigna, plus we cover
  • 50% for your family members
  • 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

  • €2000/year
  • in training (certifications, conferences, workshops) to boost your growth—both technical and personal.
  • , completely free.
  • Holistic wellness program
  • one day off a year to volunteer and give back. Bonus points for sharing pics on Slack!
  • Free therapy vouchers

Get up to

  • €55/month
  • to cover your gym or fitness classes (yoga, boxing, pilates, etc.).
  • Weekly language classes
  • Improve or learn a new language (English, Spanish, French, Italian, or German) in small groups with expert instructors—on us!
  • Time for health
  • Get
  • 8 hours per year
  • for personal medical appointments and

10 hours per year

  • to support your family’s medical needs.
  • We’re flexible and people-first. We know life happens, and we aim to make work work for you.
  • No suits here—just a welcoming, casual, and respectful space where diversity is celebrated, and you can be your full self.
  • , speaking
  • 10+ languages. All communication is in English, so everyone’s included.
  • Packlink Pro discount
  • Enjoy
  • 99% off
  • your personal shipments using our platform.
  • Referral bonuses

Know someone amazing? Earn

  • €1K–€3K
  • When you want a change of scenery, drop by our office in the heart of Madrid— free snacks and drinks included
  • We work hard and play hard with regular team-building activities and meetups.

Inclusive, upbeat culture

  • when you refer candidates we hire—depending on the role.
  • Central Madrid office