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Senior Web Compatibility Engineer
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Advanced ability to reverse-engineer obfuscated third-party code and reduce issues to minimal test cases.

DuckDuckGo

Senior Web Compatibility Engineer

Remote, Canada

Pay: $178,500 USD / year
Job type: Full-time
Workplace: Remote
Experience: 7+ years of experience building and debugging complex web applications with vanilla JavaScript.
Working hours: 40 hours per week
Posting language: English
Posted: Oct 2, 2026

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Original job description

Who We Are

Hi, we're DuckDuckGo, the online protection company and remote-first team of 300+ on a mission to raise the standard of trust online. Founded in 2008 and profitable since 2014, annual revenue now exceeds $100m USD and millions use our browser on Mac, Windows, iOS, and Android, our search engine, and the latest - Privacy Pro. Our culture of trust, inclusivity, and empowered project management underpins everything we do, where each team member takes full ownership of their projects, from scoping and execution to postmortem. If you're seeking end-to-end ownership of your work - you've come to the right place!

Your Team and Role

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.

About You

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.

Compensation

$178,500 USD annually and stock options. Compensation is identical within professional levels, regardless of geographic location or team. Compensation for each professional level is transparent across the organization.

Eligibility for company-sponsored health benefits is limited to team members based in the United States. This program does not extend to team members located in other countries, such as Canada or the UK.

Our Team Member Support Guide explains how we prioritize your wellbeing including paid parental leave, office setup, and co-working allowances.

Hiring Process

Hiring works best when it's a two-way street. Learn how we help you get to know DuckDuckGo, envision your future role here, and find out more about how we hire.

Diversity, Equity and Inclusion

DuckDuckGo provides equal work opportunities to all team members and applicants, and it prohibits discrimination and harassment of any type on the basis of race, color, ethnicity, caste, religion, age, sex (including pregnancy), national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by our policies or federal, state, or local laws.

We want to ensure that our hiring process is accessible. If you need reasonable accommodation for any part of the application process because of a medical condition or disability, please send an email to careers@duckduckgo.com to let us know the nature of your request.

Please note that:

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.

Key Principles:

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!

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More about this job

Responsibilities

You will be responsible for ensuring web compatibility across DuckDuckGo browsers by debugging complex issues and developing countermeasures for site breakage. This role involves leading incident responses, triaging technical problems, and building automated tools to improve team efficiency.

Requirements

Candidates must have 7+ years of experience in building and debugging complex web applications using vanilla JavaScript. Proficiency in web standards, browser APIs, and the ability to reverse-engineer obfuscated code is essential for this role.

Skills

JavaScript
Web standards
Browser APIs
Reverse engineering
Debugging
Swift
Kotlin
C#
C++
Python
Incident response
Web components
Triage
Automation
Technical communication

Benefits

Stock options
Health benefits
Paid parental leave
Office setup allowance
Co-working allowance

Remote locations

Argentina
Austria
Bosnia and Herzegovina
Brazil
Bulgaria
Canada
Cyprus
Czechia
Estonia
Hungary
Iceland
Ireland
Israel
Japan
Kyrgyzstan
Latvia
Malta
Mauritius
Mexico
Poland
Portugal
Romania
Singapore
Slovakia
South Africa
Spain
Switzerland
UK
Uruguay
USA

Remote locations (standardized)

Argentina
Austria
Bosnia and Herzegovina
Brazil
Bulgaria
Canada
Cyprus
Czechia
Estonia
Hungary
Iceland
Ireland
Israel
Japan
Kyrgyzstan
Latvia
Malta
Mauritius
Mexico
Poland
Portugal
Romania
Singapore
Slovakia
South Africa
Spain
Switzerland
United Kingdom
United States
Uruguay

Visa sponsorship

Not detected in the job text

Keywords

Web Compatibility
JavaScript
Browser Engines
Web Standards
Reverse Engineering
Debugging
Swift
Kotlin
C#
C++
Python
LLM
Automation
Incident Response
Web Components
Browser APIs
Remote-first
Privacy Protection
Triage
Software Engineering

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