Andrey Kostin

Designed and delivered an end-to-end reconciliation platform ingesting data from multiple payment providers (e.g., Cerner, Medhost) and matching it against clinical services to identify discrepancies and ensure accurate reconciliation. Implemented complex matching and normalization logic to align heterogeneous payment and service records (entity/record matching, deduplication, and reconciliation rules).

Built data platform application for a crypto financial intelligence platform: integrated multi-chain blockchain data (Ethereum incl. ERC-20, Bitcoin, Cardano) into a raw layer; automated ingestion, normalization, and backfills. (Python, Kotlin/Spring Boot). Implemented ledger-style processing to derive account balances and supply-related views, enabling market cap and other economic/market analytics on curated datasets.

Built an automated end-to-end system to construct and analyze social graphs from banking data. Improved core algorithm performance by a factor of ∼100x through algorithm optimization and architectural changes

Java development, technical consulting, pre-sale architecture and prototype development

Designing and developmnet BI application for management Business requirements, Business Processes, and Data Flow supporting engineering process automation. Primary customers: BMW, Tetrapack Role: - architecture design - task management, technology research - development assisting

Developmnet web-based system for content and catalog management for furniture and real-estate companies. Technology stack: SpringFramework, Hibernate, Cocoon, MySQL Customers: http://erpo.de, http://www.dreipunkt.com Roles: - Java development - technical analysis - documentation development

Algebra, Theory of small categories, homology theory

Algebra, Group theory, Algorithms