Senior Web Compatibility Engineer

DuckDuckGo

. Ensure websites work correctly in DuckDuckGo browsers across Mac, Windows, iOS, and Android .

Posted 10/2/2026full-timeRemote • United StatesSenior💰 $178,500 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and debugging complex web applications, with a strong focus on web compatibility and incident response. Proficient in reverse-engineering code and automating processes to enhance user experience and retention.

Highest-signal resume keywords

Vanilla JavaScript DevelopmentWeb Standards KnowledgeReverse-Engineering SkillsIncident Response LeadershipCross-Platform Compatibility

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Web Application DevelopmentDebugging Complex IssuesBrowser API KnowledgeLLM Agent Pipeline DevelopmentObfuscated Code AnalysisNative Client DevelopmentTest Case Reduction

Soft Skills

Problem-SolvingCommunication with StakeholdersProject Leadership

Tools & Technologies

DuckDuckGoVideo Conferencing Tools

Industry Keywords

Web CompatibilityUser RetentionPrivacy ProtectionIncident Triage

Tech Stack

Tools & technologies

AndroidiOSJavaScriptKotlinPythonSwiftC++

About the role

Key responsibilities & impact

Ensure websites work correctly in DuckDuckGo browsers across Mac, Windows, iOS, and Android
Reverse-engineer how sites detect DuckDuckGo privacy protections and build countermeasures
Shim browser APIs so sites work across different browser engines and system webviews
Build LLM agent pipelines to automatically reproduce and triage reported site breakage
Own the web compatibility side of the triage process
Debug complex issues in code the team does not control
Distinguish site bugs, browser bugs, and privacy-protection-induced breakage
Lead incident response when major sites break
Ship durable fixes across every platform
Work on projects that prevent user churn and retain DuckDuckGo users

Requirements

What you’ll need

7+ years of experience building and debugging complex web applications with vanilla JavaScript
Detailed knowledge of web standards, web components, and browser APIs
Additional experience with Swift, Kotlin, C#, C++, or Python is a bonus
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
Experience triaging issues, leading incident response, and communicating with technical and non-technical stakeholders
Experience shipping code beyond the web, such as native or desktop clients
Ability to lead complex, ambiguous projects with little to no oversight
Must attend meetings on camera via video conferencing
Must pass a background check as a condition of joining
Must be legally authorized to work in the country of residence; DuckDuckGo does not sponsor or assist with individual immigration needs

Benefits

Comp & perks

Stock options
Company-sponsored health benefits for team members based in the United States
Paid parental leave
Office setup allowance
Co-working allowances
Flexible work arrangement with no core hours
Company all-hands meetup
Team retreat
Equal work opportunities and anti-discrimination protections
Reasonable accommodation during the application process