Mark Jongkind
Co-Founder at Backscreen
Randstad, Netherlands
Summary
👤
Senior🎓
Top SchoolMark Jongkind is a product-minded software entrepreneur and co-founder with nine years of experience building live streaming and media platforms from Amsterdam. As co-founder of StreamPush he helps record labels like Sony Music monetize catalogs via 24/7 live streams on YouTube and Twitch, blending backend engineering with music-industry product strategy. He runs multiple ventures including a mobile app studio for parking solutions and a design-led web development shop, demonstrating both technical breadth and commercial instincts. His open-source contributions include expanding an Exact Online PHP client with new entities, tests and documentation—showing attention to API modeling and reliable integration. Mark combines interaction design training and computer science foundations to ship real-time systems that prioritize audience engagement and operational reliability.
9 years of coding experience
9 years of employment as a software developer
Higher professional education (HBO), Interactive Media (Communication & Multimedia Design), Higher professional education (HBO), Interactive Media (Communication & Multimedia Design) at Hogeschool van AmsterdamTU DelftVWO, Nature & Technology + Biology 1, VWO, Nature & Technology + Biology 1 at Alkwin Kollege
Stackoverflow
11reputation
197reached
1answer
1question
Github Skills (10)
php10
code-library10
api10
lib10
apidoc10
object-oriented-programming9
testing8
youtube6
youtube-data-api6
youtube-api6
Programming languages (5)
Github contributions (5)
picqer/exact-php-client
Apr 2018 - Jan 2021
PHP Client library for Exact Online
Role in this project:
Back-end Developer
Back-end DeveloperContributions:30 commits, 8 PRs, 28 comments in 2 years 8 months
Contributions summary:Mark primarily focused on adding new entities and models for the Exact Online PHP client library. These entities, such as `InvoiceTerm`, `BillOfMaterialVersions`, `BillOfMaterialMaterials`, `Project`, `ShopOrder`, `ShopOrderMaterialPlan`, `ShopOrderRoutingStepPlan`, `Operation`, and `OperationResource`, represent different data structures within the Exact Online system. The commits also included type hinting fixes and documentation improvements, along with the addition of unit tests for the newly created entities. This indicates a focus on expanding the library's functionality to cover more Exact Online API endpoints.
php
markjongkind/markjongkind
May 2024 - Jan 2026
Contributions:3 pushes, 1 branch in 1 year 8 months
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