Senior .NET Developer with React

Location: 100% remote work Salary: 130-142 PLN net/h (B2B via Experis)

Responsibilities:

• Design, develop, and deliver production-ready solutions from design through production.
• Work across APIs, business logic, integrations, data access, and asynchronous processing.
• Contribute to React and TypeScript frontend development when features require end-to-end ownership.
• Collaborate within an established architecture and assess end-to-end impact across multiple application layers.
• Build and operate HTTP APIs, integrations, and asynchronous or queue-based processing.
• Contribute to technical decisions and design discussions.
• Raise the quality bar through code reviews.
• Support less experienced engineers.

Requirements:

Must Have:

Strong current .

NET / C# backend experience in production enterprise systems.

• Solid experience with SQL Server or another comparable relational database.
• Experience building and operating HTTP APIs, integrations, and asynchronous or queue-based processing in production.
• Working experience with Azure-hosted applications.
• Ability to contribute across backend and React / TypeScript frontend when a feature requires end-to-end ownership.
• Track record of owning features through delivery, production support, and code review.
• Strong technical communication and ability to contribute to design discussions.

Nice to Have:

• Experience with MongoDB, Redis, SignalR, Ocelot, or comparable platform components.
• Exposure to regulated, finance, tax, or compliance-heavy products.
• Experience mentoring engineers or leading technical design within a squad.
• Indirect tax, VAT, or broader tax technology exposure.

Our offer:

• MultiSport Plus
• Group insurance
• Medicover Premium