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JAROCCO | Stellenangebote

The INTERNETONE AG is a specialist for online performance marketing and is a leading online full service provider in Germany. We offer a broad portfolio of services to our customers which contains business analysis, software develoment, creation, product management, online marketing and HR services. We support our customers along the entire life cycle of an online product and because of our passion and our knowledge we are experts all along the line.
We know, we can, we do!

Senior Webdeveloper (C#) (m/f/d)

Referenz-Nr.: JARO-SWBEc-2010


• development and optimisation of current and new web applications in FrontEnd and BackEnd
• modern, object-oriented software development with C#/ASP.NET Core and ASP.Net MVC using Docker Container
• code review of other team members
• working as a team member or stand alone role in new projects


• experience in designing, testing and implementing tasks as a stand alone developer
• strong practical knowledge with ASP.Net MVC Core, EF Core, ASP.NET MVC, WebApi and TDD
• good knowledge in frontend development (JavaScript, TypeScript, client-side frameworks (e.g. Angular or React)
• experience in application architecture
• strong knowledge of Design Patterns and SOLID principals
• hands-on experience with multithreading development


• a secure business with constant growth since 2009
• fast integration into our motivated, international team at our modern offices in the heart of Cologne
• flatrate of Fruits, Snacks, Coffee and Tea

Sounds like your job? Then please send your full application including your salary expectations stating the reference no. JARO-SWBEc-2010 to

We are looking forward to meeting you!

More information available on

KölnTurm / Im Mediapark 8
50670 Köln

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Köln (Nordrhein-Westfalen)
per sofort
Frau Zsofia Wagensommer
HR Business Partner
Human Resources
KölnTurm / Im Mediapark 8
50670 Köln
Telefon: (0221) 67789830