Back-End Developer (.NET/C#)

Quick Facts

• Long-term back-end development project
• ~90% remote (occasional on-site visits in Warsaw)
• B2B contract

Description

Design, develop, and maintain backend applications and REST APIs in an Agile/Scrum environment. You will build and optimize relational databases, troubleshoot and improve application performance, and support quality delivery with unit and integration tests while collaborating with cross-functional teams.

Responsibilities

• Design and develop software based on technical requirements
• Build and maintain REST APIs
• Design, develop, and optimize relational databases
• Debug, test, and improve application performance
• Create unit and integration tests
• Collaborate with cross-functional teams in an Agile/Scrum environment
• Report progress and contribute to technical documentation

Requirements

• Higher education degree
• Minimum 5 years of professional IT experience
• At least 3 years of experience as a Back-End Developer within the last 5 years
• Strong knowledge of C# and .NET Core
• Experience developing web and desktop applications
• Practical experience designing and implementing REST APIs
• Good understanding of Clean Architecture and Domain-Driven Design (DDD)
• Strong knowledge of MS SQL and/or PostgreSQL
• Experience with SQL optimization, indexing, and stored procedures
• Hands-on experience with Entity Framework Core and Dapper
• Knowledge of authentication, authorization, and encryption mechanisms (JWT, OAuth2, FIDO2)
• Experience writing unit and integration tests
• Familiarity with Azure DevOps and Git
• English at a level allowing you to work with technical documentation

Benefits

• B2B contract
• Private healthcare (Medicover)
• Multisport card
• Group life insurance
• Flexible work model with approximately 90% remote work
• Long-term project with modern .NET technologies
• Opportunity to work in an experienced, collaborative development team