Worked on the ytsaurus/ytsaurus repository, delivering three backend features over two months with a focus on C++ development and template metaprogramming. Developed type-level utilities such as Concat and Flatten for TTypes, streamlining type manipulations and reducing boilerplate in complex codebases. Enhanced NMpl map ergonomics by enabling bulk tuple access for map values, improving both correctness and developer productivity. Later, introduced a configurable connection aging parameter for HTTP and GRPC, strengthening load balancing and system stability by distributing client connections more evenly. All work emphasized maintainability, performance, and scalability, leveraging advanced C++ and metaprogramming techniques throughout the process.