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Duck Duck Go

Senior Web Compatibility Engineer

Who can apply: US-based role. The employer has not said which states are eligible — confirm before applying.
Location as listed by the employer: “Remote; Japan (Remote); Slovakia (Remote); Spain (Remote); Czechia (Remote); Switzerland (Remote); Estonia (Remote); Singapore (Remote); Mexico (Remote); Portugal (Remote); USA (Remote); Israel (Remote); Kyrgyzstan (Remote); Bulgaria (Remote); Austria (Remote); Iceland (Remote); Hungary (Remote); Ireland (Remote); Canada (Remote); South Africa (Remote); Brazil (Remote); Mauritius (Remote); UK (Remote); Romania (Remote); Cyprus (Remote); Malta (Remote); Latvia (Remote); Argentina (Remote); Bosni…”
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About this role

Duck Duck Go is hiring for a Senior Web Compatibility Engineer role (full-time). See the official posting for full details.

Requirements

  • Reverse-engineering how sites detect our privacy protections and building countermeasures that keep pages working
  • Shimming browser APIs so sites work seamlessly across different browser engines and system webviews
  • Building LLM agent pipelines that automatically reproduce and triage reported site breakage
  • 7+ years of experience building and debugging complex web applications with vanilla JavaScript.
  • Detailed knowledge of web standards, web components, and browser APIs. Any additional experience with our stack is a bonus: Swift/Kotlin/C#/C++/Python.
  • Advanced ability to reverse-engineer obfuscated third-party code and reduce issues to minimal test cases.
  • Passion for hunting elusive bugs and tracing them to their root cause.
  • Interest in automating repetitive work and building agentic tooling that multiplies the team's impact.

Summarized from the employer's posting — check the full posting for every requirement.