Oleg Zaimkin

I developed a chart component for .NET (box product) which included many 2D and 3D chart types, various interactivity features, and a rich programming model.

The component included advanced 3D rendering features for a presentation-quality look and feel, such as shading algorithm with ambient, directional and point light sources, isometric and perspective projections.

My involvement included an analysis, the overall product design, writing the specifications, and coding.

A .NET WinForms and web component for visualizing OLAP data in an interactive customizable way.

I developed the MVP of the component and led a team of five people for several years. I also designed the abstraction layer for representing the OLAP query and resulting data cube, which allowed us to handle both direct queries to Microsoft Analysis Server and to the homegrown desktop OLAP data processor for relational data.

An award-winning reporting solution for .NET with multiple features including:
• Data processing and aggregation facilities
• Template-based document generation
• Rule- and restriction-based layout and pagination engine
• A wide variety of export and viewer components for various platforms including WinForms, WPF, web, Flash, and so on

My contribution to this project includes a new processing model and algorithms of the system core, which consists of data processing and document layout. The new processing model reduced code complexity, improved memory and CPU performance by order of magnitude.

A modular SaaS application to bring company BI products to end-users.

Tasks Accomplished:
• Worked out the system design (document storage, RBAC permissions, plugins model, auth, API gateway, GraphQL endpoints).
• Developed the product in a team.
• Built the reporting module and the report render/export protocol with load balancing across several render nodes.

A blueprint full-stack application on for SAFE stack (Saturn Azure Fable Elmish). It features F# as the language for the back end and front end, Akka.NET and Akka Streams for reactive data processing, the Elmish framework (follows Elm architecture) for the client application, and WebSockets for client-server communication.

An F#-based declarative build system focusing on automatic dependencies tracking and incremental builds. It features nice DSL on top of F# syntax sugared with computation expressions. The same ideas appeared later in Google's Bazel build system.