Bart Koelman

The Netherlands

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Summary

🤩

Rockstar

Bart Koelman is a Senior .NET Engineer with two decades of experience building scalable ASP.NET enterprise applications and developer tooling, currently contributing to Broadcom’s open-source Steeltoe toolkit. He is a pragmatist who applies SOLID, DRY and KISS daily, prefers clean C# and incremental, test-driven delivery, and has driven high-volume sites and REST APIs including work for T-Mobile and Degreed. As primary maintainer of JsonApiDotNetCore and a contributor to Microsoft Roslyn, he blends deep framework-level insight with practical API and connector engineering. Colleagues describe him as analytical, conscientious and independent, often translating complex problems into elegant, long-term solutions. He thrives in fully remote, end-user organizations on permanent roles where responsibility, craftsmanship and technical vision are valued.

4 years of coding experience

Github Skills (15)

connectors10

rabbitmq10

net10

asp-net10

dotnet-new10

dotnet10

cloud-foundry10

asp-net-core10

csharp10

mysql10

dotnet-core10

mongodb-database9

exception-handling9

mongodb9

oauth8

Programming languages (7)

C#TypeScriptJavaDockerfileJavaScriptGoHTML

Github contributions (5)

SteeltoeOSS/Steeltoe

May 2022 - Jan 2023

.NET Components for Externalized Configuration, Database Connectors, Service Discovery, Logging and Distributed Tracing, Application Management, Security, and more.

Role in this project:

Back-end Developer

Contributions:565 reviews, 508 commits, 382 PRs in 8 months

Contributions summary:Bart primarily focused on bug fixes within the Steeltoe framework, targeting issues related to exception handling, and data transformation. They also fixed tests, demonstrating a focus on ensuring software quality and reliability. The user contributed to improving the HTTP client and ASP.NET hosting observer code for performance.

circuit-breakerloggingservice-discoverynet-coremicroservices

SteeltoeOSS/Samples

Dec 2022 - Jan 2023

Steeltoe samples and reference application collection

Role in this project:

Back-end Developer

Contributions:179 reviews, 44 commits, 104 PRs in 1 month

Contributions summary:Bart primarily updated and refactored several connector samples, focusing on database integrations and cloud configuration. They made changes to samples utilizing MySQL, RabbitMQ, MongoDB, and OAuth, demonstrating a solid understanding of Steeltoe connectors. Furthermore, the user updated the samples to .NET 6 and .NET 7, and also refactored the samples to utilize the main branch of the Steeltoe framework.

circuit-breakeryangservice-discoverynetscalermicroservice

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