Fullstack .NET Developer

At Grape Up our mission is leveraging technology to drive software innovation.

Together with our client, the world’s leading specialist in air transport communications, we are building enterprise cloud solutions.

We’re seeking an experienced Fullstack Developer with strong .NET and C# skills to join our development team in a new digital transformation initiative. You’ll be at the forefront of modernizing our client’s technology landscape, architecting elegant solutions that transform legacy systems into cutting-edge applications.

Responsibilities

• Design and develop robust, scalable .NET web applications in C# using Blazor
• Create responsive user interfaces using modern front-end technologies (HTML5, CSS3, JavaScript frameworks)
• Implement RESTful APIs and integrate with various data sources
• Write clean, maintainable, and well-documented code
• Write unit and integration tests
• Code reviews
• Troubleshoot, debug, and optimize application performance
• Communicate with an international team
• Collaborate with UX/UI designers to implement visually appealing and user-friendly interfaces

Requirements

• 5+ years of professional experience in fullstack development with C#
• Strong proficiency in ASP.NET + preferably experience with ASP.NET Core Blazor
• Experience working with RESTful APIs/SignalR and integrating with cloud services (Azure, AWS)
• Knack for reverse-engineering and understanding complex system
• Strong problem-solving skills and attention to detail
• Excellent communication skills to articulate technical concepts clearly
• Experience with front-end technologies (HTML5, CSS3, JavaScript)
• Good command of English (B2+/C1)

Nice to have

• Experience with C++ and Qt, SpecFlow
• Experience with system modernization or legacy code refactoring
• Experience with CI/CD process
• Experience in agile development methodologies

Benefits of joining Grape Up

• Non-corporate work environment among experienced engineers
• Individual growth & development plan supported by cyclical feedback sessions
• Access to knowledge platforms (e.g. Pluralsight)
• Equipment of your choice
• In-house business and tech trainings, and meetups
• Financing of conferences, external trainings, and certifications
• Language lessons (English, German and Polish for foreigners)
• Cafeteria MyBenefit where you can choose your favorite perks (e.g. LuxMed private medical care, MultiSport, shopping and event vouchers, etc.)
• Weekly Lunch & Learn where we meet up in the office, lunch together, and share our knowledge
• Employee referral program
• Rewards for the success of the month and year awarded by our employees
• Integration activities & trips
• Business travel opportunities to the USA, Spain, Germany, Ireland, and many other destinations