Windows .Net Software Engineer

Join CoreWillSoft GmbH and help build Windows-based software that protects critical facilities and infrastructure. We develop innovative physical security and access control solutions, integrating building automation, IoT devices, and high-security hardware. 

You’ll join an Agile, international team distributed across locations, with our headquarters in Bonn, Germany. We own the full product lifecycle — from discovery and implementation to release and operation — so your work will be visible, impactful, and close to real customer needs. 

What you`ll do: 

• Develop, maintain, and enhance Windows-based desktop applications using .Net. 
• Maintain and develop DLLs written in C++. 
• Implement CI/CD pipelines for development and QA processes. 
• Act as a liaison between the customer and the development team, collecting and synthesizing feedback into actionable tasks. 
• Ensure on-time delivery of high-quality products. 
• Collaborate with cross-functional teams, including engineering, sales, marketing, and support, to deliver successful projects. 
• Identify potential risks and issues within the project and propose mitigation strategies. 

What we offer: 

• Meaningful Impact: Build solutions that are used every day by thousands of businesses — your work will directly improve real-world security and connected device experiences. 
• Product & Process Ownership: Help shape not only the product, but also how we build and deliver it — your ideas and decisions will have visible impact. 
• Industry Influence: Contribute to key security standards and best practices, staying ahead of the curve in a fast-evolving industry. 
• Modern Tech Stack & Hardware: Work with the latest hardware and the tools you need to do your best work. 
• Time Off & Flexibility: 20 vacation days, paid sick leave, and public holidays in line with German legislation — plus flexibility built around outcomes, not micromanagement. 
• Learning & Development Budget: We support continuous growth by covering hard and soft skills courses, trainings, and access to e-learning platforms. 
• Coworking Support: Prefer not to work from home every day? We offer coworking compensation so you can choose the environment that fits you best. 
• Language Learning Support: Monthly fixed compensation you can use to improve your English or German through the learning format of your choice. 
• Strong Team Culture: Open collaboration, a flat structure, and thoughtful onboarding—your voice is heard, and you can make an impact from day one. 

What you bring: 

• Proven experience in Windows .Net Desktop application development. 
• Familiarity with System.Reactive and its extensions for reactive programming. 
• Experience with System.Security.Cryptography for cryptographic operations. 
• Basics knowledge of C++ and DLL development. 
• Experience in implementing CI/CD pipelines. 
• Excellent communication and collaboration skills. 
• Advanced Business English language knowledge. 
• Good analytical skills, oriented on continuous process improvement. 
• Responsibility for customer/partner relation growth. 

Nice to have: 

• Experience with IoT products in building automation and physical access control. 
• Mastery Degree in Computer Science or related field. 
• Understanding of general security concepts. 
• German language skills.