Senior Software Engineer

April 8

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Mozilla

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Mozilla is a non-profit organization dedicated to promoting an open and accessible internet. They are the makers of the popular Firefox browser, which emphasizes user privacy, speed, and control. Mozilla also offers a range of products that focus on internet security and privacy, including Mozilla VPN, Firefox Relay, and Mozilla Monitor. Additionally, the organization is involved in open-source projects, AI innovation, and advocating for digital rights. Mozilla aims to empower users with trustworthy technology and policies that protect privacy, support open-source AI development, and foster accountability for tech companies.

browser • internet • software • mobile • web apps

501 - 1000 employees

Founded 1998

👥 B2C

🔒 Cybersecurity

📋 Description

•To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu. •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. •The Relay Engineering Team is committed to building tools that empower users to manage their online identities and maintain their privacy. We work on various ongoing and upcoming projects, ranging from sustaining existing products to integrating new solutions for scalability and security. We are a highly collaborative team that thrives on innovation, feedback, and continuous improvement. •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. You’ll work on projects that focus on privacy and security, including features like email and phone number masking, which are central to our users’ online safety.

🎯 Requirements

•7+ years of experience in software development with a strong focus on backend technologies. •In-depth knowledge of Python, Django, and confidence leading back-end engineering projects. •Experience deploying and operating applications on cloud infrastructure like AWS or GCP, with a strong understanding of DevOps practices and SRE collaboration. •Experience with monitoring tools such as Grafana, Sentry, and BigQuery, including data-driven optimization and troubleshooting. •Experience with JavaScript, Typescript, React, next.js, SCSS, and a willingness to contribute to full-stack development when needed. •Strong communication skills and ability to collaborate across engineering, product, and operations teams. •Experience mentoring junior engineers and driving technical excellence in code quality, testing, and process improvements. •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

🏖️ Benefits

•Generous performance-based bonus plans to all eligible employees - we share in our success as one team •Rich medical, dental, and vision coverage •Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) •Quarterly all-company wellness days where everyone takes a pause together •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)