Decentriq

Senior AdTech Engineer – Freelance

Decentriq

contract

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Location Type: Hybrid

Location: Zürich • Switzerland

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Job Level

Senior

Tech Stack

JavaScriptPythonRust

About the role

  • 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

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

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
JavaScriptPythonadserver integrationslow-latency systemskey-value lookupspixel integrationsidentity graphsID resolutionRust
Certifications
Bachelor's degreeMaster's degreePhD in Computer Science