In my experience, it will have minor to none implications.
- Job interviews barely talk about failed exams, if they even pose a question about your studies at all, they focus on what you put your focus on.
- You could check your Prüfungsordnung or get in touch with the Studienbüro, if they actually include the amount of failed attempts in your Abschlusszeugnis. If they don't, you could chose to lie about it.
- Your final grade and internships plus work experience are far more important than a failed class. So even if you decide to tell them, it should have minor implications.
- Nonetheless, I think if they have to pick between two equal applicants where one has no failed attempts, they will pick him/her.
Things that actually are part of job interviews/applications in germany (in my experience)
Hobbies you persue (as an opener for the interview)
Final Grade
Your Abschlussarbeit, if it's related to the field you want to work in
In Computer Science, they could ask algorithm questions, although this depends on if they have qualified personnel
Experience in the workfield (internships, experience during your studies)
Questions to check if you fit into the company and have the required competency to do the job.
In the job interviews I had, they never mentioned my transcript of records.