Oleg Bartunov is the most famous Russian PostgreSQL developer, working on it more than 20 years.
Teodor is one of the Russian PostgreSQL Major Contributors. Takes part in PostgreSQL development since 2000. Author of full-text search, GiST (together with Oleg Bartnunov) and other core features and extensions.
Alexander is PostgreSQL Major Contributor, a professional computer scientist. His PhD dissertation was based on PostgreSQL contribution: improvements to fuzzy string search including index-based regular expression search. One of the most valuable achievements of his work for open source community is the development of the access method extensibility infrastructure. Also his contributions include improvements to GiST and GIN indexes, optimizations for multicore systems, statistics and selectivity estimation for advanced datatypes. Alexander was a GSoC mentor 3 times. Alexander is a co-founder of Postgres Professional company and CEO of Postgres Professional Development.