Senior Software Developer (m/w/d) - Windows

Introduction

We are seeking a Senior Software Developer to enhance our Windows application, a secure document editing and collaboration platform.

What you'll do

In this role, you will be a hands-on technical developer responsible for designing and building scalable systems, making sound technical decisions, and collaborating effectively with team members.Core Development

• Design and develop new features for the Windows client application using modern .NET technologies
• Build and maintain desktop applications that handle file management, application launching, and session lifecycle management
• Implement security features including argument validation, secure file handling, and authentication integration
• Optimize application performance and reliability in enterprise environments

Architecture & Design

• Design and implement scalable application architecture for Windows client deployments
• Apply service-oriented patterns and dependency injection for maintainability and extensibility
• Create reusable components and libraries for document handling and session management
• Evaluate and recommend technology solutions for new features

Integration & Deployment

• Develop installer packages and deployment automation for enterprise distribution
• Implement integration with server-side components and cloud services
• Build custom installation logic and system validation checks
• Ensure compatibility with enterprise Windows environments and Group Policy configurations

Quality Assurance & Testing

• Write comprehensive unit and integration tests to ensure code quality and reliability
• Develop automated testing strategies covering multiple scenarios
• Participate in code reviews and knowledge sharing with team members
• Participate in security reviews and threat modeling

Technical Collaboration

• Communicate technical decisions and architectural rationale to team members and stakeholders
• Partner with product and security teams to translate business requirements into technical solutions
• Share knowledge and best practices through documentation and technical discussions

Your profile

What you'll bring· 7+ years of professional software development experience

• 4+ years developing Windows desktop applications (.NET ecosystem preferred)
• Strong understanding of application lifecycle management and deployment strategies
• Experience with version control systems and collaborative development workflows
• Proven track record delivering production-grade enterprise software
• Proficiency in C# and modern .NET framework development
• Experience with Windows application development, UI frameworks, and Windows API integration
• Understanding of installer and packaging technologies
• Knowledge of security principles for desktop applications (encryption, secure storage, input validation)
• Experience with automated build and deployment systems
• Solid grasp of testing frameworks and testing methodologies
• Strong problem-solving and debugging abilities
• Clear communication and documentation skills
• Ability to take ownership of complex features and drive them to completion
• Self-motivated with strong attention to detail
• Experience working in Agile development environmentsEssential Skills· Technical depth combined with strong problem-solving abilities
• Ability to balance architectural vision with practical delivery timelines
• Collaborative approach to working with cross-functional teams
• Proactive approach to identifying and resolving technical risks
• Passion for building products that solve real business challenges

Nice to Have

• Knowledge of Windows Server deployment and management
• Background in security-focused software development
• Experience with PowerShell scripting and system automation
• Understanding of document management systems or content collaboration platforms
• Experience with enterprise authentication systems (Active Directory, SAML, OAuth)
• Knowledge of RDP (Remote Desktop Protocol) or Terminal Services
• Experience building cross-platform applications
• Familiarity with CI/CD pipeline development

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Source: Statistisches Bundesamt (Destatis), table; dl-de/by-2-0; StarIn's calculation

Posted Nov 01, 2026