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Senior Full-Stack Engineer, Email Systems

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Mozilla

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Location:
United Kingdom; United States; Canada

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

108000.00 - 144000.00 USD / Year
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Job Description:

As a Senior Software Engineer, Web Services, you’ll contribute to a whole new suite of communication tools including end-to-end encrypted file sharing, an email service, an appointment booking service, and more. You’ll join the Web Services Team, which is responsible for building and maintaining the accounts and email services that power these offerings.

Job Responsibility:

  • Build and prototype new features and solutions to tackle complex technical challenges
  • Develop and maintain metrics to monitor email delivery rates and sender reputation, and diagnose service-level issues
  • Monitor email industry standards, trends, and emerging threats, and propose improvements to strengthen delivery, reputation, and spam resilience
  • Develop, test, and evolve the code architecture to ensure scalability, maintainability, and robustness
  • Conduct code reviews to ensure adherence to quality standards and best practices, and contribute to technical strategy and architectural decision-making
  • Build and deploy prototypes and experiments to improve workflows, conversions, and privacy-respecting analytics capabilities
  • Evaluate and implement systems and improvements across security, logging, performance, and accessibility
  • Support the stability and reliability of our services, including participation in a shared on-call rotation

Requirements:

  • 7+ years of professional software development experience
  • 2+ years in a Senior Software Engineer role
  • 2+ years of experience with JavaScript/TypeScript
  • 2+ years working with Python 3
  • Experience building and maintaining email services
  • Experience building and maintaining web applications
  • Experience working across the full software development life cycle
  • Ability to translate wireframes, style guides and design direction into polished, production-ready visual experiences
  • Proven ability to deploy and manage web infrastructure on AWS or similar cloud providers
  • Strong attention to detail
  • Excellent English written and verbal communication skills
  • Commitment to collaboration, open development, and building secure, privacy-respecting technology

Nice to have:

  • Background in Java and/or Rust development
  • Familiarity with Stalwart (email server)
  • Hands-on work developing and maintaining an Identity Provider (IdP) such as Keycloak or similar
  • Practice writing Infrastructure as Code (IaC), ideally with Pulumi
  • Contributions to open-source projects or active engagement with open-source communities
What we offer:
  • Fully remote work & schedule flexibility
  • Latest Laptop
  • Discretionary Annual Bonus Program
  • Monthly Remote Work Stipend
  • Annual Professional Development Stipend
  • Access to Udemy Learning Platform
  • Industry Conferences
  • Company All Hands
  • 24 days PTO per year (prorated)
  • Your Birthday
  • Year-end Company Shutdown
  • 9 Wellbeing Days
  • Public Holidays
  • Other Paid Leave
  • Quarterly Wellbeing Stipend for Personal / Family Activities
  • 401(k) / RRSP / Pension Contributions
  • Health, Dental, & Vision Insurance
  • Disability Insurance
  • Life Insurance
  • Employee Assistance Program
  • Paid Parental Leave
  • Paid Sick Days

Additional Information:

Job Posted:
March 03, 2026

Employment Type:
Fulltime
Work Type:
Remote work
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