Junior .NET Backend Developer

Quick Facts

• Role: Junior .NET Backend Developer
• Focus: Real-time IoT/telematics backend (GPS devices, vehicle movement, telemetry processing)

Description

You will develop small .NET API endpoints, business processes, and services that process GPS device data. The work is supported by code reviews, guidance from experienced developers, and opportunities to learn both technology and the IoT/telematics domain. You’ll contribute to a multi-service, real-time backend system communicating with devices and handling large telemetry/route datasets.

Responsibilities

• Implement small C#/.NET endpoints, services, and business rules
• Create and modify SQL Server queries using Dapper or Entity Framework Core
• Develop integrations between the application, internal APIs, and data-processing services
• Write and maintain unit and integration tests and fix issues found in testing environments
• Participate in code reviews, requirement analysis, and documentation of changes

Requirements

• C# and basic object-oriented programming
• Understanding of HTTP, REST API, and basic ASP.NET Core
• Ability to write SQL queries; understanding of relations and transactions
• Knowledge of Git and basics of automated testing
• Interest in developing reliable backend systems (not only UI screens)
• Ability to read technical documentation in English
• First commercial experience, internship/practice, or a project showing code quality

Hard Skills & Technologies

• C#
• .NET 7-9
• ASP.NET Core / Web API
• Worker Services
• SQL Server
• Dapper
• Entity Framework Core
• Redis / Redis Streams
• MediatR
• REST / OpenAPI
• gRPC
• SignalR
• Docker
• Unit and integration tests
• Azure DevOps

Benefits

• Subsidy for private medical care and MultiSport card
• Extra day off for your birthday
• Hybrid work mode: 3 days per week in the Kraków office
• Work on a product with visible impact for everyday customer operations and real-time maps
• Real influence on technical solutions, quality standards, and how the product evolves