Senior .NET C# Developer (Cyber Security)

Join Rublon to work with a team of cybersecurity enthusiasts who are building the future of enterprise user authentication. Rublon is a multi-factor authentication platform used by hundreds of customers across the globe to protect employee logins to networks, servers, endpoints and applications.

We are looking for a long-term employee or contractor who will support development efforts in the following project:

Development of connectors for Microsoft Technologies

Rublon provides connectors that enable multi-factor authentication for Microsoft technologies, e.g.: RD Web Access, RD Web Client, Outlook Web App (OWA). Your job will be to enhance these products by supporting more use cases and maintaining their compatibility with the latest releases from Microsoft.

Additionally, you will support development of other Rublon solutions in at least one of the following technologies: C++, Python, React Native, Java, PHP.

How You'll Work

• You'll work remote or in our offices in Kraków and Zielona Góra
• Technology Stack: C#, .NET, Windows API, Active Directory, Inno Setup
• Language: Polish for communication with team members; English for project documentation and commit comments
• Hardware: modern laptop
• Office: comfortable chair, external display
• Self development: access to online training courses, sponsored certifications
• Benefits: access to private medical care and MultiSport card (employees only)

What You'll Do

As a developer at Rublon you will help develop software for modern user authentication:

• Development of Rublon connectors for Microsoft technologies
• Develop enterprise software solutions for user authentication
• Development takes place locally on your company laptop as well as on external environments
• Analyze requirements, create concepts and discuss them with the product manager
• Monitor code quality and perform code reviews
• Design, implement and execute development and integration tests

Skills You Have

• Thorough experience in backend software development using C# .NET
• Experience in at least one of these additional technologies: C++, Python, React Native, Java, PHP
• Knowledge about Windows API
• Knowledge about Windows Server administration, incl. Active Directory
• Ability to confidently communicate with peers
• Ability to speak Polish fluently

Requirements

• At least five years of commercial software development experience
• Completed higher education in computer science
• Work permit in Poland

Nice To Haves

• Former commercial experience as IT systems administrator (Windows Server)
• Experience with Microsoft 365 technologies like Entra ID and Intune
• Knowledge of Identity & Access Management (IAM) concepts
• Experience in unit testing, test design and test automation
• Experience in network penetration testing
• Knowledge about writing secure software

Why Apply

• You’re eager to join a highly collaborative team of cybersecurity software experts, developing cutting-edge user authentication solutions
• You find fulfillment in creating technology that has a global impact by safeguarding organizations from cyber threats

Steps After You Apply

1. You’ll be invited to an online meeting with our recruiter
2. Afterwards, we’ll ask you to do a small assignment, which will then be discussed with one of our technical leads
3. If everything goes well, we will make you an offer and invite you to a final interview