Sergei Kosyi

Shaping the cloud-native data platform on GCP. Driving data modelling, CI/CD, cost governance, and architectural decisions. Engaged in enterprise IT strategy and vendor evaluation. Over the past 2 years, led the consolidation and cloud migration of 10+ legacy analytical platforms, enabling scalable, future-ready AI data products.

Telecom operator №1, 20K+ pax, 60PB of data in hadoop. • technology management (open-source) • hiring architects (100+ interviews) • Data Platform infrastructure planning • Technological Committee speaker • solution architecture for a user-behavior platform (like google analytics). Technologies: Kafka, Flink, Clickhouse, Airflow, PostgreSQL, Java, Python, Aerospike CE, Hadoop, Hive, Spark

• creating HLD for MDM system: 10+ master systems, 50M+ customers records, low-latency and high availability (99,9%) and reliability requirements • creating solution architecture for the advertising platform (DMP) and ad-hock analytics. 100M+ records in the Customer profile, 2500+ metrics • creating architectural documentation: ATAM, LAAM, C4, UML Hadoop, Spark, Python, Kafka, Airflow, Hive, Alation, PostgreSQL, Teradata, Golang, Prometheus, Gitlab, Grafana, Jenkins

design and development of new functionality for sales, back-office, legal, risk departments; design and development of integrations with 3-d party services and systems; analyzing and fixing performance bottlenecks; troubleshooting and bug fixing; participation in project planning meetings; consulting of business departments;

Diploma of excellence Diploma project: The application of Sliding Modes for the helicopter in hover mode