Senior Web Compatibility Engineer

• 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.

• Experience triaging issues, leading incident response, and communicating clearly with technical and non-technical stakeholders.

• Experience shipping code beyond the web, like native or desktop clients.

• Ability to lead complex, ambiguous projects with little to no oversight.

Working on the Web Dependability Engineering team, you'll make sure websites just work in DuckDuckGo's browsers across Mac, Windows, iOS, and Android, helping ensure our users have the best-possible experience browsing with DuckDuckGo. Recent projects include:

• 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

As a Senior Web Compatibility Engineer, you'll be our resident expert on why websites break and how to fix them: owning the webcompat side of our triage process, debugging gnarly issues in code you don't control, distinguishing site bugs from browser bugs from privacy protection-induced breakage, leading the charge when a top site breaks and becomes an incident, shipping durable fixes across every platform, and work on related projects that prevent user churn and keep users coming back to DuckDuckGo.

• You'll be required to attend meetings on camera via video conferencing

• Expect to travel at least two times a year: once for our all-hands meetup and again for a team retreat (each around 4-5 days). While extenuating circumstances may impact attendance, everyone is strongly encouraged to attend.

• While we offer a flexible work arrangement with no core hours, expect an average full-time commitment of 40 hours per week.

• A successful candidate must pass a background check as a condition of joining the team.

• By applying for this role, you confirm that all information submitted is accurate and complete. You further acknowledge that providing false or fraudulent information during the application process is cause for denial of an offer, revocation of any existing offer, or other adverse action, up to and including termination after the start of your commencement of work.

Disclosure Statement: Use of AI in Hiring Process

As part of our commitment to enhancing our recruitment process, we utilize artificial intelligence (AI) technology to assist in reviewing and summarizing job applications and test projects, including those tools integrated into our recruitment vendor platforms. We use AI to flag potentially fraudulent applications, analyze and summarize applicants' experience, interviews, and project performance, and help streamline our selection process.

• Data Privacy: All information provided in your application will be handled in accordance with our Recruiting Privacy Policy. We ensure that your personal information is protected and used solely for recruitment purposes.

• Human Oversight and Accountability: The AI technology is designed to support our hiring team by providing insights and summaries of applications and evaluations of test projects against scoring rubrics. All final evaluations and hiring decisions, however, will be made by our hiring team, who will consider the AI's input alongside other factors.

• Transparency: We believe in transparency regarding our hiring practices. If you have any questions about how AI is used in our recruitment process, please feel free to reach out to us.

By submitting your application, you acknowledge and consent to the use of AI technology in our review process. If you would like to request an alternative selection process, please contact us as at careers@duckduckgo.com. Thank you for your interest in joining DuckDuckGo!