Senior Software Engineer

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, , 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 software components that align with business and technical requirements. You will take ownership of feature implementation, troubleshoot technical challenges, and collaborate with cross-functional teams to deliver scalable solutions. 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.

What will you be doing?

• 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.
• Collaborating closely with other teams and departments, such as product teams to ensure solutions meet business and technical requirements.
• Communicate effectively with team members and external stakeholders to clarify requirements and share progress updates.
• Participate in technical discussions, advocate for improvements, and help resolve disagreements constructively.
• Providing timely, concise, and actionable feedback to team colleagues.
• Share knowledge through documentation, workshops, or informal team sessions.
• Assist in technical interviews to evaluate candidates for your team.
• Maintaining openness to communication with both local and external partners.
• Proactively learn new tools and practices (e.g., DevOps, cloud services) to expand technical expertise.

What are we looking for?

• 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.
• Strong orientation toward task automation to save time and effort.
• Implementation of improvements and optimizations in daily operations.
• 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.
• Knowledge and experience in use of design patterns
• Proficient in English at a communicative level.

Tech Stack

• C# .NET
• TypeScript
• Javascript
• Amazon Web Services

What do we offer?

• Annual Salary Review: We are reviewing the salaries of all our teams annually in order to evaluate an increase according to individual performance and the business results.
• 99% discount on your personal shipment orders via
• Up to 500PLN/year to match your NGO donations We are happy to support your initiatives by duplicating the amount donated.
• Volunteer day. You can take 1 day off per year in order to participate in volunteering activities We will love to see some pictures in our slack
• Referral Fee We need your support in hiring top-class talent We offer a referral bonus of 4-20k, depending on the complexity of the role and the hiring process.
• We have an Employee Assistance Program with psychological assistance free of charge.
• Great work-life balance We offer a flexible work schedule and will do our best to adapt to your personal situation. Working in a fast-paced environment can be intense, but that doesn't mean you shouldn't enjoy your free time
• An inclusive and upbeat work environment Leave your suit behind... we're a t-shirt and converse kind of place More importantly, our company culture promotes diversity and inclusion. The personality and opinions of each of our team members are important and valid, and we aim to offer all employees a safe environment where they can be themselves and thrive.
• A cross-cultural atmosphere We are a truly international team of 20 nationalities that speak 10 languages. Our company language is English and all internal communication and company-wide meetings are in English.
• Company events Work hard, play hard We do our best every day, even at our regular team-building events.
• Internal and external training, free access to online training platforms such as Linkedin Learning
• Possibility to work in a home-office using equipment provided by AUCTANE, or in our office prepared in accordance with all safety requirements.
• Personal Training Budget. Up to 3.500 PLN/year training budget (certifications, conferences attendance, etc.) to invest in your professional development. We want to help you improve your technical skills, feel involved in the product community, and develop your soft skills to lead teams and manage other stakeholders.
• Up to 30 days of vacation per year (additional days are granted along with seniority at AUCTANE).
• Languages classes every week. Thirsty for knowledge? Learn a new language by joining our free English/Spanish/German classes. You can connect and enjoy taking up a new language or improving your current skills with one of our great instructors.
• Free private medical insurance.
• Attractive life insurance.
• Co-financing for sports and recreational activities
• Gym membership co-financing
• Nice Office in Zielona Gora (free drinks, snacks…)
• Do you want to know a little bit more about the team? Please, don't hesitate to reach out to Amazing Auctane-PL and our Instagram