FlexReview is a flexible code review framework that aims to improve the efficiency and effectiveness of code reviews in large distributed teams. It analyzes past data of code review patterns to calculate an expert score for every file and developer, which helps determine the right reviewers for each code change. The framework also takes into account reviewer availability, workloads, and code complexity to suggest reviewers. Additionally, it tracks response times and provides a GitHub status check validation feature to ensure that all required reviewers have completed their reviews before merging a PR. FlexReview aims to reduce the total number of reviewers needed, expand the suggested pool of reviewers, and enforce code owners' requirements while minimizing disruptions to existing workflows.