Richy Gerard focused on backend development and database internals for the percona/percona-server-mongodb repository, addressing correctness and reliability in multi-role request handling. He implemented invariant checks in C++ to ensure the ServiceEntryPoint used the appropriate service context for ShardServer and RouterServer roles, directly reducing edge-case bugs in request routing. Richy refactored the OpMsgFuzzerFixture to support separate client strands, which improved test isolation and overall test quality. By adding explicit cluster-role validations and assertions, he strengthened the safety of multi-role deployments. His work demonstrated depth in backend engineering, with careful attention to testing and robust service context validation.