Clients: - Symmetry Investments (London, Hong Kong) - Kaleidic Associates (London)

Proposed and implemented a distributed in-memory column based database from scratch. The database allows to compute per-user statistics in a few seconds for call logs of more than 300 million active users . On the other hand, Hadoop alternatives like Spark require more than three orders of magnitude more time.Proposed and implemented a new statistical model for A/B testing that takes into account the statistical nature of phone calls.https://imo.im

Organised database production of retail sales audit of pharmaceutical assortment.Proposed and implemented business process solutions between a few company departments.Developed specialized address search engine (hierarchical database & web-server) based on Federal Information Address System.Developed data validation system.Worked on data validation between the company, clients, and contractors.