We’re seeking a Senior Full Stack .NET Developer to join our team and help build scalable, high-performance web applications and APIs that empower thousands of product sellers worldwide. You’ll work across the full stack, from backend services to frontend interfaces, ensuring reliability, quality, and long-term scalability in a fast‑evolving SaaS environment.
About the Project
You’ll join a global software team developing a market‑leading inventory management platform that supports merchants in selling, tracking, and optimizing products across multiple online and offline channels. The platform processes millions of orders per year and integrates with a wide ecosystem of e‑commerce, retail, and logistics partners to simplify complex supply‑chain operations. This role requires a small overlap with U.S. working hours for collaboration with the client’s team.
Key Responsibilities
- Design, build, and maintain web applications and RESTful APIs using C#, .NET Framework, JavaScript, and SQL Server;
- Collaborate closely with product managers, QA engineers, and developers to translate business needs into reliable, scalable solutions;
- Write clean, testable, and maintainable code aligned with modern development practices;
- Implement efficient data access using Entity Framework and optimize queries, stored procedures, and data models;
- Troubleshoot and resolve application issues, including performance bottlenecks and system bugs;
- Participate in code reviews, mentor peers, and contribute to a culture of continuous improvement;
- Work in an agile environment, proactively driving the quality and evolution of business‑critical systems.
Qualifications
6+ years of experience in full‑stack development using .NET technologies, SQL Server, and JavaScript;Proven expertise with C# and .NET Framework for building modern web applications and services;Strong proficiency in Microsoft SQL Server and understanding of query optimization and database design;Experience with Entity Framework for data access and ORM;Familiarity with Git or similar version control systems and agile methodologies;Strong problem‑solving mindset and a commitment to clean, maintainable architecture.In exchange for your skills, we offer
Supportive relationships, built on transparency and a flat structure, in a diverse and multinational team;Office in the center of historical Kraków, where your dog is always welcome;Flexibility when it comes to working from the office or home;Perks include Multikafeteria, Group Life Generali insurance, Signal Iduna, Multisport, language lessons 1 : 1;Sport and other events, including weekly running, squash, and team lunches on the house;Free tea, coffee, and all‑you‑can‑eat fruits and nuts in the office.The recruitment process includes
HR screening 30min zoom call;1h technical interview;General call with the team leader;Making an offer meeting.#J-18808-Ljbffr