[Hiring] Senior Software Engineer @Mozilla

Mozilla; United States; Remote; CAD 104,000 - 139,000; Full time

Job summary

An innovative technology company is seeking a Senior Software Engineer to join their remote team. In this role, you will be pivotal in developing and maintaining backend systems, ensuring the privacy and security of user identities. You will work with cutting-edge technologies like Python, Django, and AWS, while collaborating with cross-functional teams to deliver seamless integrations. This is an exciting opportunity to contribute to projects that empower users and shape the future of online privacy. If you are passionate about technology and want to make a meaningful impact, this role is perfect for you.

Benefits

Generous performance-based bonus plans

Rich medical, dental, and vision coverage

Generous retirement contributions

Quarterly wellness days

Birthday off

Home office stipend

Annual professional development budget

Quarterly well-being stipend

Paid parental leave

Employee referral bonus program

Qualifications

• 7+ years of software development experience focusing on backend technologies.
• In-depth knowledge of Python and Django with strong backend project leadership.

Responsibilities

• Lead backend development using Python, Django, and REST frameworks.
• Design and maintain email and phone number masking systems using AWS and Twilio.

Skills

Python

Django

REST APIs

JavaScript

TypeScript

React

Next.js

Cloud Infrastructure (AWS/GCP)

Monitoring Tools (Grafana, Sentry, BigQuery)

Team Collaboration

Education

Bachelor's Degree in Computer Science or related field

Tools

AWS

GCP

Grafana

Sentry

BigQuery

Twilio

Job description

Apr 09, 2025 - Mozilla is hiring a remote Senior Software Engineer. Salary: $104,000 - $139,000 CAD. Location: Canada.

Why Mozilla?

Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies.

About this team and role:

The Relay Engineering Team is committed to building tools that empower users to manage their online identities and maintain their privacy. As a Senior Software Developer at Mozilla, you will be an integral part of the Relay Engineering Team, responsible for building and maintaining key backend systems and supporting frontend implementations.

What you’ll do:

• Lead backend development when required, in Python with Django and REST framework.
• Design, implement, and maintain code for email and phone number masking using AWS and Twilio APIs.
• Work closely with our SRE team to develop and operate production environments including monitoring and alerting with tools such as Grafana, Sentry, and BigQuery.
• Periodically rotate into a Base Load Engineer (BLE) role: handling releases, dependency updates, and incoming work requests.
• Support frontend development in JavaScript, Typescript, React, and Next.js.
• Partner with cross-functional teams to align on project goals and ensure seamless frontend-backend integration.
• Participate in code reviews to maintain high standards of code quality and system reliability.
• Participate in security and privacy reviews, ensuring compliance standards.

What you’ll bring:

• 7+ years of experience in software development with a strong focus on backend technologies.
• In-depth knowledge of Python, Django, and confidence leading backend engineering projects.
• Experience deploying and operating applications on cloud infrastructure like AWS or GCP.
• Experience with monitoring tools such as Grafana, Sentry, and BigQuery.
• Experience with JavaScript, Typescript, React, Next.js, SCSS, and a willingness to contribute to full-stack development.
• Strong communication skills and ability to collaborate across teams.
• Experience mentoring junior engineers and driving technical excellence.

Bonus Points for experience with:

• REST API servicing millions of clients.
• Twilio.
• AWS: SES, S3, SNS, SQS.
• GCP: Kubernetes, Compute, SQL, BigQuery.
• Email tech: DMARC, SPF, DKIM, FBL.

What you’ll get:

• Generous performance-based bonus plans.
• Rich medical, dental, and vision coverage.
• Generous retirement contributions with 100% immediate vesting.
• Quarterly all-company wellness days.
• Country specific holidays plus a day off for your birthday.
• One-time home office stipend.
• Annual professional development budget.
• Quarterly well-being stipend.
• Considerable paid parental leave.
• Employee referral bonus program.
• Other benefits (life/AD&D, disability, EAP, etc. - varies by country).

About Mozilla

Mozilla exists to build the Internet as a public resource accessible to all. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere.

Commitment to diversity, equity, inclusion, and belonging

Mozilla encourages applications from everyone, including members of all equity-seeking communities.

We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process.

We are an equal opportunity employer. Mozilla will not tolerate discrimination or harassment based on any characteristics.

Group: D

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ReqID: R2763