Arjen Bloemsma
SharePoint Specialist Fullstack Developer at Bloemium
Amsterdam, North Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolArjen Bloemsma is a SharePoint specialist and full-stack .NET developer with 10+ years of experience building enterprise SharePoint and Microsoft-stack solutions across finance, academia and corporate retail. He blends deep C#/.NET expertise (from legacy 1.x through modern 4.5), SharePoint Online/2013, PowerShell and front-end technologies like TypeScript and HTML5 to deliver provisioning, workflow and integration features. At Marlink and ING he acted as a problem solver and lead developer, and his open-source contributions to Microsoft 365 PnP (improving provisioning templates and list management) and the CLI for Microsoft 365 show a practical focus on extendable tooling for SharePoint and Power Automate. Colocated in Amsterdam, he combines hands-on backend work with a history of cross-cutting UI and automation projects—often surfacing non-obvious content-type and default-value handling improvements that make large SharePoint deployments easier to manage.
10 years of coding experience
19 years of employment as a software developer
HAVO, HAVO at R.S.G. Simon VestdijkBachelor ICT, Bachelor ICT at De Haagse Hogeschool / The Hague University of Applied Sciences
English, Dutch
Github Skills (17)
microsoft10
sharepoint10
microsoft-azure10
dotnet-core10
azure10
csharp10
cli10
testing9
azure-active-directory9
dotnet9
typescript9
net9
typescript-types9
asp-net9
typescripts9
Programming languages (8)
Github contributions (5)
pnp/PnP-Sites-Core
Apr 2017 - Jan 2018
Microsoft 365 Dev PnP Core component (.NET) targeted for increasing developer productivity with CSOM based solutions.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 commits, 3 PRs, 1 comment in 8 months
Contributions summary:Arjen primarily contributed to the core functionality of the PnP Sites Core library, focusing on provisioning templates and list extensions. They added logic for filtering content types in provisioning templates based on content type groups and implemented functionality to remove and manage default column values within lists. The contributions include new methods and tests to enhance the capabilities related to content type and list customization. This work extends the capabilities of the library, enabling more flexible template creation and list management.
dotnetcore-componentpnpdevproductivity
pnp/cli-microsoft365
Sep 2018 - Dec 2018
Manage Microsoft 365 and SharePoint Framework projects on any platform
Role in this project:Back-end Developer
Back-end DeveloperContributions:10 commits, 10 PRs, 34 comments in 3 months
Contributions summary:Arjen added several commands related to Azure Management and SharePoint Online, focusing on retrieving and managing Power Automate flow runs, Power Automate runs, and SharePoint list webhooks. Their commits involved the implementation of new commands and the creation of corresponding test files, suggesting a focus on expanding the functionality of the CLI tool. The user's contributions appear to be directly tied to improving the Microsoft 365 management capabilities of the project.
microsoft-plannermicrosoft-power-appsoffice365onedriveazure-ad-b2c
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