Waldek Mastykarz
Principal Developer Advocate AI Coding Agents
Randstad, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolWaldek Mastykarz is a Principal Developer Advocate specializing in AI Coding Agents at Microsoft, with 11 years of experience building developer tooling and improving agent experiences across Microsoft products. He founded and maintains the popular open-source CLI for Microsoft 365 and is an active leader in the M365 PnP community, growing its maintainer team and shaping contributor engagement. His hands-on background spans front-end React work for SharePoint Framework and Microsoft Graph Toolkit to backend and DevOps contributions in CLI tooling and Azure integrations. He pairs product leadership (former Head of Product at Rencore) with pragmatic engineering, having shipped UI components, API integrations, and manifest validation tooling used by Office developers. Based in the Randstad, he combines deep Microsoft 365 expertise with a research-minded focus on agent evaluation platforms—an unusual blend that bridges community-driven open source and cutting-edge AI agent research.
11 years of coding experience
11 years of employment as a software developer
Bachelor IT, Bachelor IT at De Haagse Hogeschool / The Hague University of Applied Sciences
English, Dutch, Polish
Stackoverflow
706reputation
89kreached
34answers
2questions
sharepoint
top-5%
Github Skills (35)
apim10
javascript10
libreoffice10
spfx10
addin10
yeoman-generator10
sharepoint-framework10
css10
gulp10
typescript10
user-interface10
web-components10
sharepoint10
office36510
office-js10
Programming languages (12)
Github contributions (5)
pnp/cli-microsoft365
Nov 2017 - Dec 2022
Manage Microsoft 365 and SharePoint Framework projects on any platform
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:1658 reviews, 1168 commits, 1923 PRs in 5 years 2 months
Contributions summary:Waldek's commits focus on adding support for connecting to and managing the Azure Management Service within the context of the pnp/cli-microsoft365 repository. The contributions include adding new commands, particularly for managing Microsoft Flow environments. The user's work involved writing test specifications, indicating a commitment to code quality, and integrating new functionality related to Azure services. This user demonstrates proficiency in cloud-related command development within a CLI context.
microsoft-plannermicrosoft-power-appsoffice365onedriveazure-ad-b2c
pnp/sp-starter-kit
Mar 2018 - Nov 2020
Modern SharePoint Starter Kit - End-to-end showcase solution to get started with modern experiences.
Role in this project:Front-end Developer
Front-end DeveloperContributions:24 commits, 6 PRs, 2 pushes in 2 years 8 months
Contributions summary:Waldek primarily focused on building user interface components and features. Their commits include the addition of the "Weather" and "People directory" web parts, which involved creating React components, integrating with external APIs, and configuring user interface elements. They also made changes to existing components to improve performance and consistency. Furthermore, the user implemented the tab page extension, showcasing their ability to extend the application's functionality.
reactend-to-endboilerplateget-startedsharepoint
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