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Decentriq

Senior AdTech Engineer – Freelance

Decentriq

Senior AdTech Engineer developing and maintaining adtech integrations at Decentriq. Collaborating with publishers and building key-value lookups for adservers in a flexible work environment.

Posted 5/16/2026contractZürich • 🇨🇭 SwitzerlandSeniorWebsite

Tech Stack

Tools & technologies
JavaScriptPythonRust

About the role

Key responsibilities & impact
  • Own Our JavaScript Tags – Develop and maintain Decentriq's client-side tags for our OneID identity system and DMP event capture.
  • Support Publisher Integrations – Work directly with publisher technical teams to integrate our tags and troubleshoot implementation issues.
  • Build Adserver Integrations – Develop key-value lookups and integrations with adservers (GAM, Xandr).
  • Own Server-to-Server Integrations – Design and build low-latency S2S integrations with the adtech ecosystem: adservers, DSPs, and identity providers.
  • Creative Pixel Integrations – Build and maintain pixel integrations for campaign measurement and attribution.

Requirements

What you’ll need
  • Bachelor/Master/PhD in Computer Science or a related field and 5+ years of professional experience.
  • Expert-level JavaScript and Python; experience building low-latency, production-grade adtech systems.
  • Have worked at a publisher, DMP, or SSP—you understand the adtech ecosystem from the inside.
  • Hands-on experience with adserver integrations (Google Ad Manager, Xandr).
  • Experience with identity graphs, ID resolution, or cookieless identity solutions (Plus).
  • Familiarity with privacy frameworks (TCF, consent management) (Plus).
  • Rust proficiency (we use it for backend services and compute-heavy client-side modules) (Plus).

Benefits

Comp & perks
  • Competitive rates
  • Ownership instead of simply an executor
  • An amazing and fun team that is distributed all over Europe.

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Hard Skills & Tools
JavaScriptPythonadserver integrationslow-latency systemsidentity graphsID resolutioncookieless identity solutionsRustpixel integrationskey-value lookups
Certifications
Bachelor's degreeMaster's degreePhD in Computer Science