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Backend developer C#

· Job Posted April 05, 2026
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Job Description

SIG is a leading provider of packaging systems and solutions. We work in partnership with our customers to bring food products to consumers around the world in a safe, sustainable, and affordable way. We are the only packaging system supplier covering carton, pouch, and bag-in-box. Our versatile technology and product innovation capacity enable us to deliver better for customers, for consumers, and for the world.

Job Responsibility

  • Maintain and develop our core application and its extensions
  • Design modern Web APIs, including authentication and encryption
  • Ensure unit tests and interface testing are performed
  • Ensure high security standards of the Web applications
  • Provide good quality documentation using appropriate tools (e.g., Swagger)
  • Give support in the implementation of interfaces for other teams
  • Close cooperation with external suppliers and other relevant SIG departments
  • Ideally support and extend our externally developed web interface

Requirements

  • At least 3 years of experience in C# and Web Development
  • Experience in agile software development with Scrum
  • Experience working with REST APIs
  • Understands how to create intuitive User Frontends (UI) and how to improve User Experience (UX)
  • Fluent in English, fluent in German is a plus
  • Has an analytic mindset and is able to transfer concepts into code
  • Good communication skills and can work as part of a team
  • Experience in the implementation of web applications and a deep understanding in modern IT architecture

Nice to have

  • Ideally, more than 2 years of frontend experience in JavaScript, Typescript, React
  • Ideally, more than 2 years of backend experience in NodeJS
  • Ideally, experience in using npm for web applications and Git for code versioning
  • Appreciated skills: C#, React, Typescript, System design, Unit-Testing and mocks, Software documentation, Git Version Control
  • Optional: MongoDB
  • Application experience: Visual Studio
  • Optional: Jira, Katalon, WPF, Azure DevOps, Docker, Cloud

What we offer

  • Competitive compensation
  • Opportunity to partially work from home
  • Part of a globally successful international company
  • Personal development opportunities, trainings and coaching opportunities from senior team members

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