Walenty Kowalski

Continued the same role after Tieto acquired Infopulse, on an enterprise planning and forecasting platform for a Big Four consulting client, developed by a 90+ person team across 4 countries on 3 continents. Refactored the Portal to Reporting Service integration from direct API calls into an asynchronous, event-driven flow keeping the reporting read model in sync (eventual consistency), using Azure Service Bus for messaging and Azure Blob Storage for staging large payloads. Contributed to migrating the Portal from a single 5+ TB database to a 10-shard architecture across the .NET application layer and the SQL layer. Redesigned the Reporting Service ingestion pipelines for 10 shards: initial load, incremental sync, and reconciliation that detects and fixes data drift. Used GitHub Copilot for AI-assisted development, creating project instruction docs and custom skills.

Enterprise platform for a Big Four consulting client: scenario-based planning and lifecycle management of multi-level project hierarchies, with resource and financial forecasting down to the financial week. Designed and built a dedicated Reporting Service with its own database (CQRS read model), pre-calculating and materializing data on every key Portal data change, which cut report generation time from 3-7 minutes to about 3 seconds. Designed the Portal to Reporting Service integration and ETL pipelines for the initial data migration and ongoing ingestion. Moved Excel export from the browser (Kendo UI) to the server (Aspose.Cells for .NET), removing browser freezes on large exports and lowering client CPU load. Developed and maintained secure backend REST APIs consumed by an Angular frontend. Built new complex financial reports and maintained and refactored legacy ones. Tuned SQL Server performance by profiling and rewriting slow stored procedures and functions and reworking indexing.