Senior Developer role responsible for ownership of the client-side monetization stack at Overwolf Ads, including the ad unit runtime, auction engine, and management console. Responsibilities include leading project deployments with teams in Israel and the US, defining and scoping product and technical requests, driving client-side publisher migration, expanding monetization coverage, and developing revenue-focused capabilities. Requires 6+ years software development experience, strong vanilla JavaScript skills, backend experience with PHP 8 or Go and REST APIs, deep understanding of ad tech technologies such as header bidding, Prebid, OpenRTB, ad serving, and experience with video ad formats. Strong English communication skills needed for collaboration with US teams.
What you'll do
Take end-to-end ownership of the ad unit runtime, client-side auction engine, and management console, ensuring reliable delivery, stability, and performance across publisher environments and browsers
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Lead project deployments involving developers in Israel and the US, including pull request reviews, production deployment approvals, and incident handling during US working hours
Define and scope incoming product and technical requests from Overwolf Ads, BI, and Apps, translating them into clear, actionable development tasks
Drive the client-side publisher migration to completion, including the required wrapper support
Expand monetization coverage across Overwolf and new bidder publishers, supporting additional players and ad formats
Develop and optimize revenue-focused capabilities, including yield logic, dynamic floors, bidder ID support, and platform features
Write, review, and deliver production-ready code, taking personal accountability for what ships to production
Requirements
6+ years of professional software development experience
Strong proficiency in vanilla JavaScript, particularly within third-party publisher environments
Backend development experience with PHP 8 or Go and REST APIs
Deep understanding of ad tech technologies, including header bidding, Prebid, OpenRTB, and ad serving
Experience working with video ad players and formats, including instream, outstream, and rewarded video
Previous experience at an ad tech company, such as an SSP, ad server, header bidding wrapper provider, or publisher-side monetization platform
Strong written and spoken English, with the ability to collaborate effectively with US-based developers and cross-functional teams
Tech stack
JavaScriptPHP 8GoREST APIsheader biddingPrebidOpenRTBad servingvideo ad playersinstream videooutstream videorewarded video
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