Pent Ploompuu
Senior Software Engineer at Microsoft
Tallinn, Harju maakond, Estonia
Summary
🤩
RockstarPent Ploompuu is a Senior Software Engineer based in Tallinn with 15 years of experience focused on high-performance .NET runtime and back-end systems. At Microsoft since 2018, he has deep expertise in runtime internals, JIT behavior, System.DateTime performance, and decimal arithmetic optimizations demonstrated by substantial contributions to flagship repos like dotnet/runtime and CoreRT. He also improves serialization, code generation, and decompilation accuracy in projects such as Orleans and ILSpy, showing a talent for subtle, correctness-focused fixes that yield measurable performance gains. Known for refactoring tricky exception- and type-handling code, Pent combines careful low-level reasoning with pragmatism, often surfacing improvements that reduce overhead in widely used platform components.
15 years of coding experience
Estonian, English
Stackoverflow
5,374reputation
641kreached
93answers
1question
serialization
top-5%
Github Skills (38)
algorithm10
algorithms10
decompiler10
net10
dotnet-new10
dotnet10
data-serialization10
data-structure10
decompile10
serialization10
asp-net10
type-system10
code-generation10
performance-optimization10
dotnet-core10
Programming languages (3)
Github contributions (5)
dotnet/orleans
Sep 2018 - Dec 2022
Cloud Native application framework for .NET
Role in this project:
Back-end Developer
Back-end DeveloperContributions:63 reviews, 76 commits, 66 PRs in 4 years 3 months
Contributions summary:Pent contributed to the serialization and data type handling within the .NET-based Orleans framework. Their work focused on improving the performance of type serialization and deep copy operations by refining logic for handling shallow copyable types, value types, and immutable types. The user implemented fixes to handle private fields and enhanced the framework's code generation capabilities to streamline the handling of data types.
dotnetconcurrencycloud-computingdistributed-actorsframework
icsharpcode/ILSpy
Feb 2011 - Apr 2018
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
Role in this project:Back-end Developer
Back-end DeveloperContributions:66 commits, 3 PRs, 4 comments in 7 years 2 months
Contributions summary:Pent contributed to the .NET decompiler project by addressing specific issues related to the Intermediate Language (IL) representation. Their work involved fixing handler blocks in the code and removing temporary local variables generated by the C# compiler for immutable value type method calls. The user also merged updates and simplified operators on nullable values to improve the accuracy and efficiency of the decompilation process.
dotnetilspydecompilepdbmono
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