Siemens Senior Software Engineer Go interview questions

The interview consisted of 3 rounds, 1. Technical Interview: All details on golang, focused on bytes and rune and go channels and concurrency. - Fairly easy-to-medium level questions. 2. System Design: In depth questioning on APIs and expectations, and later on a system design round to create flipkart like structure. Lasted for 2 hours and fairly tough round. 3. HR - Salary Discussion and some other discussion about company