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About us
At Auctane, we are united by a passion to help sellers — wherever they are, however they operate — fulfill the promises they make to consumers. The Auctane mission is to fuel commerce through exceptional delivery. We make it possible for businesses to meet the ever rising expectations of their customers, and we make the world smaller and more accessible to consumers everywhere. Auctane brands enable hundreds of thousands of merchants to annually deliver billions of products — over $200 billion worth — to customers around the globe. And Auctane is just getting started.
Auctane is a team of shipping and software experts with a passion for helping merchants move their ideas, dreams and innovations around the globe. The Auctane family includes ShipStation, ShipWorks, ShipEngine, ShippingEasy, Stamps, Endicia, Metapack, GlobalPost, and Packlink. Our partners include Amazon, UPS, USPS, eBay, BigCommerce, Shopify, WooCommerce, and Walmart.
Our values
Salary range for this role: 15 500- 21 000 PLN gross/month
About the role
As a Senior Fullstack Developer, you will play a key role in the design, development, and maintenance of our web applications using ReactJS and .NET. You will be responsible for driving technical decisions, mentoring team members, and ensuring the architectural integrity of our solutions. This role requires deep technical expertise, strong problem-solving skills, and the ability to work across teams to deliver high-impact solutions.
This role is ideal for someone who thrives in a fast-paced environment, enjoys mentoring others, and takes initiative in driving technical excellence.
What will you be doing?
Design, develop, and maintain scalable web applications using React and .NET.
Lead technical discussions and contribute to architectural decisions.
Optimize web applications for performance, scalability, and security.
Mentor and support junior developers, fostering a culture of learning and growth.
Collaborate with cross-functional teams, including Product, UX/UI, and DevOps, to drive innovation and best practices.
Conduct and oversee code reviews, ensuring adherence to best practices and high-quality standards.
Troubleshoot and resolve complex issues across the full stack.
Stay updated with industry trends and proactively introduce improvements.
What are we looking for?
5+ years of experience in web application development with React and .NET (in total).
Deep understanding of JavaScript (ES6+), TypeScript , and modern front-end frameworks.
Strong expertise in designing and integrating RESTful APIs.
Proven experience in architectural decision-making and system design.
Experience with source control systems and branching strategies (e.g., Git).
Proficiency in testing frameworks such as Jest, React Testing Library, or Playwright.
Strong ability to communicate complex technical concepts to both technical and non-technical stakeholders.
Self-driven with a proactive approach to problem-solving.
What will make you stand out?
Bachelor's degree in Computer Science or a related field.
Experience with AWS services and cloud architecture.
Knowledge of modern build tools and deployment strategies.
Familiarity with DevOps practices and CI/CD pipelines.
Tech Stack
React, JavaScript (ES6+), TypeScript
C# .Net
Amazon Web Services
SQL Server
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.
Personal Training Budget. Up to 7.000 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).
Up to 500 PLN/year to match your NGO donations ! We are happy to support your initiatives by duplicating the amount donated.
Lunch card