Senior Software Engineer (HYBRID REMOTE)

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 Engineering team Following a successful year of engineering growth in Poland, we're continuing to expand our teams and strengthen our presence in the region. Our Polish hub is a key part of our engineering organization, bringing together talented people who work on complex, international products and collaborate across a global environment. As we continue to grow, we're looking for people who are excited by new challenges, enjoy working with experienced teams, and want the opportunity to make a meaningful impact while continuing to develop their skills and career. About the role As a Senior Software Engineer, you will lead the architecture and evolution of our test automation platform and drive continuous improvement across our Speedship engineering ecosystem. You'll architect solutions, mentor junior engineers, and make strategic decisions about framework design and engineering best practices. At Auctane, we value professionals at every stage of their career journey. When applying for this position, please note that we'll assess your profile and skills based on your experience level. Our goal is to build a diverse and complementary team that brings together different perspectives and levels of expertise. If you're excited to contribute to a newly formed team, we'd love to hear from you! What will you be doing? Design and architect core components of our Playwright-based test automation framework Lead platform engineering decisions and establish architectural best practices Mentor junior software engineers and conduct technical code reviews Develop comprehensive testing strategies for complex feature sets Optimize system performance, reliability, and maintainability across the platform Diagnose and resolve complex infrastructure and framework issues Collaborate with product and engineering teams to define testability requirements Evaluate and implement new tools, frameworks, and engineering techniques Establish and maintain test data management and infrastructure strategies Drive documentation, knowledge sharing, and engineering standards Manage technical debt and refactor systems for scale and performance What are we looking for? Bachelor's degree in Computer Science, Software Engineering, or related field (or equivalent professional experience) + 3 years of experience with Java 17+ and Spring Boot / Spring Framework and at least 5 years total experience in the software development field Demonstrated ability to architect and lead technical initiatives Proven ability to architect and maintain large-scale software systems Strong software engineering fundamentals with focus on code quality and scalability Leadership capability without requiring formal management title Initiative to identify and solve problems proactively Passion for continuous improvement and staying current with engineering practices Collaborative approach to working across teams Ability to balance pragmatism with technical excellence Experience advocating for quality and engineering rigor within organizations Proficiency in Polish and English is required for this role What will make you stand out? Previous experience in test automation with Playwright and/or Selenium Tech stack Core Platform: Java 21, Maven, TestNG, Extent Report…