It is possible for clients to find and consider your profile on Upwork even if you have not sent them a proposal. When a client posts a job, they can view the profiles of freelancers who have submitted proposals as well as those who have not. The client can then choose to contact a freelancer directly, regardless of whether or not they have submitted a proposal. However, it is important to note that the likelihood of a client finding and considering your profile may be higher if you actively submit proposals for relevant job postings. Additionally, factors such as your profile completeness, work history, and client feedback can also impact a client's decision to consider you for a job.