Vitaliy Kovalev

Lead analytics platform strategy, access rules, performance, and data quality for Yandex’s fintech division — with responsibility for road map, data quality governance, and internal BI tooling.

Scaled the analytics platform (2.4× growth from 660 to 1,597 MAU) while reducing P95 dashboard load time from 25s to 7s and cutting error rate from 2.1% to under 0.1%, improving both adoption and trust in data across the business.

Introduced unified data quality tooling across all fintech analytics teams, reducing data incident rates from 6–8% to under 1% and strengthening reliability of business-critical reporting.

Built data ingestion and quality pipelines for internal support documentation, powering an AI support agent and overhauling the knowledge creation process.

Built a hybrid RAG platform — enabling multiple ML-teams to use it in LLM-powered products as a shared service.

Led BI Excellence of ride-hailing business unit — multi-billion-dollar product lines. Managed 4 direct reports and a community of 80–100 BI professionals within Yandex; owned analytics standards, tooling strategy, and delivery practices division-wide.

Led the rapid Tableau-to-DataLens migration programme: personally migrated 94% of critical Management Reporting reports and created reusable JS visualisation templates adopted across 1,300+ dashboards, becoming the company-wide standard.

Drove platform-wide performance improvements: reduced P95 load time from 25.4s to 15.6s and error rate from 2.12% to 0.1%.

Founded Reporting Expo (120 attendees, eNPS 70) to drive adoption and build community of practice.

Built and owned the Management Reporting cluster — the primary executive reporting platform for the Taxi business unit (282 MAU, 6,000+ monthly views, bookmarked by the CEO), delivering trusted analytics to senior leadership.

Created Tableau Speedtest (open-source performance benchmarking tool) and trained 300+ Tableau creators across the company, raising BI development standards and self-serve capability organisation-wide.

Led a BI team of 2, migrating sales reporting from Excel and SAP BusinessObjects to Tableau — reduced report generation time from hours to minutes and saved ~1.3 FTE, freeing analyst capacity for higher-value work.

Built ETL pipelines to power sales and operational dashboards, reducing manual reporting overhead.

BI Platform & Analytics Engineering: Platform ownership, self-serve analytics, data quality and governance, executive reporting, analytics standards, BI administration, mentoring and team development.

Data & Engineering: SQL, Python, ClickHouse, PostgreSQL, Greenplum, Docker, Linux/Unix, Git, ETL pipeline design.

LLM & Internal AI: RAG systems, LLM evaluation and retrieval quality assessment, FastAPI, AI-tools.

Visualisation & Reporting: Tableau, Yandex DataLens, SAP BO.

Instructor at Karpov Courses (Tableau analyst programme) — course reached 2,100+ learners. Invited corporate trainer delivering Tableau workshops for Deutsche Bank, MTS, and Shopify.

Speaker at Tableau User Groups. Featured in Tableau DataFam Roundup for community contributions.

Author of a technical blog on BI and analytics. Open-source contributor (Tableau Speedtest).