The Celonis interview process is a massive, disorganized time sink that lacks basic professional respect. I originally applied for an Application Manager role which was put "on hold," yet I saw it being actively refreshed on LinkedIn. I was then pivoted to a Solutions Architect role. ​The case study, scoped at 12 to 15 hours, actually required over 70 hours of intensive preparation. Mid-process, I was told to "wait" as they slightly changed the assignment scope. To make matters worse, the "Dry Run" was a total waste of time; the feedback provided there was completely unaligned with the final panel’s expectations. ​Most disappointing was the behavior of HR. Throughout the process, they were overly polite, wishing me "all the best" at every step while I was providing them with dozens of hours of free work. However, the moment the rejection was decided, the mask dropped. The friendly tone was replaced with arrogance and rudeness. Instead of a professional debrief after such a significant time investment, the feedback provided was dismissive and delivered with a condescending attitude. ​Pros: ​Market-leading product. ​Cons: ​Exploitative Workload: They grossly underestimate the time required for case studies (15 hrs vs. 70 hrs). ​HR Behaviour: Polite only when they want something; arrogant and rude once the rejection is sent. ​Internal Disarray: Total lack of alignment between the "Dry Run" and the Final Presentation panel. ​Dishonest Pipelining: Putting roles "on hold" while still actively recruiting for them on social media. ​Advice to Management: Fix your culture of candidate treatment. Being polite only when a candidate is a "prospect" and turning arrogant after a rejection is the height of unprofessionalism. If a candidate gives you a week's worth of free consulting, they deserve a respectful, human conversation and constructive feedback not a rude, template-style dismissal.