Alexander is computer scientist (PhD) and developer of Open Source DMBS PostgreSQL (major contributor). In 2015 together with other Russian PostgreSQL developers he founded Postgres Professional company which is Russian vendor of PostgreSQL. Alexander contributes to PostgreSQL more than 7 years and his contribution includes: pluggable index access methods, advances to GiST and GIN indexes, better algorithms for spatial and fuzzy string search, multicore system optimizations and more.