Senior C# / .NET Core Developer

Job Description Code & Pepper supports clients in demanding industries, helping them scale teams and build modern products.

Work with us on the development of a modern, large-scale application being created for the public sector, emphasizing security and reliability. As a Back-end Developer, you will be responsible for designing, implementing, and optimizing business logic using C# and .NET Core.

The role requires close work with relational databases, advanced authorization mechanisms, and the application of Clean Architecture and DDD practices. What can we offer you? Cooperation in the B2B model or Employment Contract – You choose. Salary for Employment Contract: 15,000 - 21,000 PLN gross B2B rate: 18,000 - 25,000 PLN net + VAT

Training budget (up to 2,500 PLN net per year) Flexible working hours (including core hours) Possibility of 100% remote work Multisport Plus card and private medical care (Luxmed)

Requirements

Minimum 5 years of general commercial experience, supported by higher education At least 3 years of experience (obtained within the last 5 years) as a Back-end Developer in commercial projects (with a budget of at least 100,000 PLN net) Very good knowledge of C# and the .NET Core platform in the context of web and desktop applications Practical skill in designing and implementing a secure REST API Proficiency in applying design patterns and implementing Clean Architecture and Domain-Driven Design (DDD) principles Experience working with relational databases (MS SQL, PostgreSQL), including query optimization, index creation, and writing stored procedures Practical knowledge of ORM systems (Entity Framework Core, Dapper) Knowledge of modern authentication, authorization, and data encryption mechanisms (JWT, OAuth2, FIDO2) Ability to write and maintain unit and integration tests Proficiency in using the GIT version control system, Azure DevOps environment, and knowledge of the English language allowing for free reading of technical documentation English language at a level enabling free communication

Must have: C#, .NET CORE, REST API, Clean Architecture, DDD, Domain-driven design, MS SQL, PostgreSQL, Data base, ORM, Entity Framework, Dapper, JWT, OAuth2, FIDO2, Git, Azure DevOps