Worked on the facebook/fbthrift repository to address a reliability issue in Thrift-Python client templates by fixing the import of mutable clients. The solution involved updating Python templating logic to ensure both mutable and immutable Thrift clients were correctly imported, resolving an edge-case that previously led to client-mixing and runtime errors in dependent backend services. This targeted bug fix improved overall service stability and reduced operational errors. The work demonstrated careful attention to edge-case handling in Python and Thrift, with a focus on backend development practices that enhance the reliability and maintainability of service integrations relying on Thrift clients.