[Hiring] Senior Ad Tech Specialist @Refinery89

Role Description

We are looking for a Senior Ad Tech Specialist to join our Product and Development environment and take ownership of complex technical investigations across live publisher advertising stacks. This is a deeply technical role focused on diagnosing issues, reproducing problems, identifying root causes, validating solutions, and translating findings into clear specifications or fixes that our Development team can act on.

• Work directly with live publisher environments, Prebid, Google Ad Manager, Amazon APS, consent frameworks, SSP integrations, browser debugging tools, and the wider programmatic ecosystem.
• Support Product decisions, roadmap prioritization, and technical go or no go decisions with evidence from real publisher environments.

Qualifications

• 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.
• 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.

Requirements

• 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 to understand what is happening.
• Validate request ordering, consent propagation, and bidding behavior against the intended configuration.
• Confirm fixes in live environments before considering an issue resolved.
• Perform structured audits across publisher monetization stacks.
• Review areas including 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 clear action plans prioritized by impact and severity.
• Track technical changes across Google, Amazon APS, Prebid.js, SSP partners, and the IAB Tech Lab.
• Assess how ecosystem changes may affect the Refinery89 stack and publisher implementations.
• Translate findings into clear technical recommendations.
• Escalate decisions when changes require Product or Development involvement.
• Support phased technical rollouts using clearly 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.

Benefits

• 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.

Interview Process

• Initial Screening: A short introductory conversation with our recruitment team to understand your background, experience, English level, AdTech experience, and motivation.
• Technical Conversation: A live technical discussion based around a real Prebid or Google Ad Manager configuration.
• Written Technical Exercise: A practical exercise designed to assess how you investigate, document, and solve complex AdTech problems.
• Final Conversation: A final conversation with the CTO and relevant team members.