C# Desktop Developer – Mid-Level

Alterdata Software

. Develop and enhance desktop applications using C# / .NET, WinForms, WPF, or modern .NET frameworks, applying DDD, SOLID, and Clean Architecture .

Posted 10/28/2026full-timeRemote • BrazilMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing and enhancing desktop applications using C# / .NET, with a strong focus on Object-Oriented Programming, SOLID principles, and Clean Architecture. Proficient in automated testing, Agile methodologies, and maintaining legacy systems while contributing to architectural improvements.

Highest-signal resume keywords

C# / .NET Application DevelopmentObject-Oriented Programming (OOP)Domain-Driven Design (DDD)Automated Testing with xUnitAgile Methodologies (Scrum, Kanban)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C#.NETWinFormsWPFSQLPostgreSQLDependency InjectionCQRSMediatRAutomated Testing

Soft Skills

Problem SolvingCollaborationCommunication

Tools & Technologies

Azure DevOpsGitTFVCKiroClaude CodeCursorGitHub CopilotCI/CDDocker

Certifications & Qualifications

Bachelor’s Degree in Computer Science

Industry Keywords

Clean ArchitectureSOLID PrinciplesAgile CeremoniesLegacy SystemsNoSQL Databases

Tech Stack

Tools & technologies

AzureDockerNoSQLPostgresSQLWPF.NET

About the role

Key responsibilities & impact

Develop and enhance desktop applications using C# / .NET, WinForms, WPF, or modern .NET frameworks, applying DDD, SOLID, and Clean Architecture
Maintain legacy VB6 systems and enhance modernized systems built with C# .NET
Implement and maintain components, services, and integrations, ensuring performance and code quality
Analyze and resolve complex bugs in testing and production environments
Write and execute automated unit and integration tests
Contribute to improvements in architecture, performance, and development practices, including code reviews and refactoring
Participate in Agile ceremonies, such as Daily Stand-ups, Planning, Reviews, and Retrospectives
Support effort estimation and delivery planning
Participate in architecture discussions, share knowledge, and support other team members

Requirements

What you’ll need

Experience developing desktop applications with C# / .NET at the mid-level to advanced mid-level, using WinForms, WPF, or modern .NET frameworks
Strong command of Object-Oriented Programming (OOP), SOLID principles, and Clean Architecture
Practical experience applying DDD (Domain-Driven Design), Dependency Injection, CQRS, and MediatR (Commands and Queries)
Strong experience with SQL, particularly SQL Server or PostgreSQL
Experience with automated testing tools such as xUnit and Moq
Experience with Git version control used daily in Azure DevOps, along with knowledge of TFVC for maintaining legacy systems
Practical experience using AI-powered productivity tools for software development, such as Kiro, Claude Code, Cursor, and GitHub Copilot
Experience with Agile methodologies such as Scrum and Kanban
Bachelor’s degree in Computer Science, Systems Analysis and Development, or a related field
Nice to have: familiarity with Visual Basic 6; development of features integrated with language model APIs; web development; NoSQL databases; Azure; CI/CD; Docker

Benefits

Comp & perks

This position is also open to people with disabilities (PwD)