John Rosendahl is a product and engineering leader with over a decade of experience building ad tech platforms, identity and addressability solutions, and revenue-driving exchange products. He has progressed from hands-on engineering and founding a startup to directing product at companies like Mediavine and Optable, guiding cross-functional teams through complex technical transformations. Comfortable spanning front-end, back-end, and data strategy, he’s contributed practical fixes and feature support to the widely used Prebid.js open-source project. Known for marrying privacy-compliant data strategies with pragmatic product roadmaps, he routinely turns technical constraints into commercial differentiation. Based in Denver, he combines deep ad stack expertise with a founder’s bias for shipping and measurable impact. An uncommon strength is his history of toggling between engineering bootstraps and strategic product leadership, enabling him to translate low-level technical tradeoffs into executive decisions.
Setup and manage header bidding advertising partners without writing code or confusing line items. Prebid.js is open source and free.
Role in this project:
Front-end Developer
Contributions:10 commits, 16 PRs, 16 comments in 3 years 7 months
Contributions summary:John primarily focused on fixing code style issues, specifically addressing camel case inconsistencies within JavaScript files. They also made updates to various bid adapter modules, including changes to RealVu Analytics Adapter, BridgeWell Bid Adapter, and Audience Network Bid Adapter, addressing missing this, and added support for First Party Data (FPD). Further contributions involved adding support for ID modules and implementing configurable TTL settings.
Setup and manage header bidding advertising partners without writing code or confusing line items. Prebid.js is open source and free.
Contributions:22 reviews, 20 PRs, 74 pushes in 3 years 9 months
headerprebidjavascriptconfusingbidding
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John Rosendahl - Director Of Product Management at Optable