I was asked to complete a coding challenge as part of the interview process. While the coding task itself was manageable, the requirements also included preparing detailed documentation such as a user guide and an overview of the code, which took several days of focused effort to complete. Despite investing significant time and submitting everything as requested, I never received any follow-up, acknowledgment, or even a simple thank-you from the company. This lack of basic communication and appreciation made it one of the most disappointing and unprofessional interview experiences I’ve had.