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.
Top Skills
What We Do
We specialize in building augmented teams tailored to our clients' needs. Nimble and pragmatic, we prioritize real teamwork and smooth collaboration without any red tape.
Our approach is rooted in human-to-human interactions and thoughtful actions, resulting in customer intimacy and the organic development of success stories within our extended team.
As experts in team augmentation, we thoroughly understand our clients' requirements, offer strategic advice, and manage the entire recruitment process. Our services include:
- Flexibility in workforce scaling
- Cost-effective hiring
- Full access to talented individuals in Europe
- GDPR compliant data processing
Summarized, our partners reap the benefits of transforming complex administrative processes into one transparent monthly invoice.
Our reputation is built on reliable partnerships, emphasizing talent and potential.
Make a wise decision to collaborate with us, and we'll take care of the rest
