Senior Ad Tech Specialist

• Own complex technical issues that Operations or Development teams have been unable to resolve
• Investigate tag defects, rendering failures, consent issues, bid path problems, and unexpected revenue behavior
• Reproduce issues using live publisher inventory and controlled staging environments
• Identify root causes and distinguish structural limitations from configuration problems that can be resolved
• Produce clear technical specifications or patched tag implementations before handing work over to Development
• Investigate publisher implementations directly at browser level
• Use Prebid debugging, network requests, browser consoles, HAR files, and consent string inspection
• Validate request ordering, consent propagation, and bidding behavior against intended configuration
• Confirm fixes in live environments before considering an issue resolved
• Perform structured audits across publisher monetization stacks
• Review Prebid configuration, Google Ad Manager, Amazon APS, CMP and TCF implementation, floor models, ad units, identity solutions, video, SSP health, and bidder performance
• Score findings and produce action plans prioritized by impact and severity
• Track technical changes across Google, Amazon APS, Prebid.js, SSP partners, and the IAB Tech Lab
• Assess ecosystem changes affecting the Refinery89 stack and publisher implementations
• Translate findings into technical recommendations and escalate decisions requiring Product or Development involvement
• Support phased technical rollouts using defined success metrics
• Establish validation criteria and rollback conditions
• Test implementations in staging environments before Development handoff
• Monitor performance following deployment and validate results against agreed thresholds

• At least 5 years of experience in programmatic advertising technology, preferably within publisher monetization or the supply side
• Significant hands on experience diagnosing and debugging live advertising environments
• Deep working knowledge of Prebid.js, including configuration, adapters, modules, identity solutions, floors, and debugging
• Ability to inspect and understand bidder adapter source code when documentation alone is insufficient
• Strong technical knowledge of Google Ad Manager, including line items, pricing rules, AdX, dynamic allocation, GPT implementations, and MCM models
• Strong understanding of IAB TCF 2.x and GDPR consent mechanics, including how consent is propagated across Prebid, GAM, and Amazon APS
• Understanding of OpenRTB and supply chain transparency standards including ads.txt, sellers.json, and schain
• Strong JavaScript knowledge, with the ability to read, modify, and validate production advertising tags
• Advanced browser developer tools skills including network inspection, HAR analysis, and console debugging
• Ability to write structured technical documentation that a developer can execute without requiring extensive additional explanation
• Professional English proficiency at C1/C2 level
• Previous professional experience in AdTech is mandatory

• Remote working within compatible EU time zones
• A temporary 6 month contractor agreement with the possibility of extension
• 50% coverage of the standard Sanitas private health insurance plan
• The opportunity to work directly on complex publisher monetization environments and real world programmatic infrastructure
• An international team working across AdTech, technology, data, and publisher operations