Senior Web Compatibility Engineer

DuckDuckGo is an online protection company and remote-first team of over 300 employees, founded in 2008 and profitable since 2014, with annual revenue exceeding $100 million USD. Millions use their browser across Mac, Windows, iOS, and Android, their privacy-focused search engine, and the Privacy Pro product. The company emphasizes a culture of trust, inclusivity, and empowered project management, where each team member has full ownership of their projects from scoping to execution and postmortem.

• 7+ years of experience building and debugging complex web applications using vanilla JavaScript.
• Detailed knowledge of web standards, web components, and browser APIs.
• Ability to reverse-engineer obfuscated third-party code and reduce issues to minimal test cases.
• Passion for investigating and tracing elusive bugs to their root cause.
• Interest in automating repetitive work and building tooling that amplifies team impact.
• Experience triaging issues, leading incident response, and communicating with technical and non-technical stakeholders.
• Experience shipping code beyond web environments, such as native or desktop applications.
• Ability to lead complex and ambiguous projects independently.

Nice to have:

• Experience with Swift, Kotlin, C#, C++, and Python.

• Own the web compatibility side of the triage process for website issues.
• Debug complex issues in code outside the company's control.
• Distinguish between site bugs, browser bugs, and privacy protection-induced breakage.
• Lead incident response when major websites break and cause incidents.
• Ship durable fixes across all supported platforms (Mac, Windows, iOS, Android).
• Work on projects to prevent user churn and retain users.
• Reverse-engineer how sites detect privacy protections and build countermeasures.
• Shim browser APIs to ensure site functionality across different browser engines and system webviews.
• Build LLM agent pipelines to reproduce and triage reported site breakage automatically.

• Eligibility for company-sponsored health benefits is limited to team members based in the United States; does not extend to other countries.
• Required to attend meetings on camera via video conferencing.
• Expected to travel twice a year for an all-hands meetup and team retreat (4-5 days each).
• Successful candidates must pass a background check.
• Providing false or fraudulent information during the application process is grounds for offer denial or termination.
• Use of AI technology is part of the hiring process for reviewing applications and projects, with human oversight.
• Equal opportunity employer with anti-discrimination policies.
• Reasonable accommodations for applicants with disabilities available upon request.