Full-Time

Staff Software Engineer

Mozilla VPN

Confirmed live in the last 24 hours

Mozilla

Mozilla

1,001-5,000 employees

Not-for-profit organization promoting internet health

Compensation Overview

€75k - €100k/yr

Senior, Expert

Madrid, Spain

Category
Backend Engineering
Security Engineering
Software Engineering
Required Skills
Wireshark
iOS/Swift
C/C++
Android Development
Linux/Unix
Requirements
  • 6+ years of software engineering experience
  • Expert level proficiency in C/C++
  • Expertise in networking protocols and privacy and security best practices
  • Extensive knowledge of core OS concepts of Windows or Mac
  • Experience developing cross-platform applications (Windows, macOS, Linux, iOS, Android)
  • Experience debugging network related problems with Wireshark, tcpdump, or similar tools
  • Excellent communication skills and experience mentoring engineers
Responsibilities
  • Drive the architecture, development, and optimization of the Mozilla VPN client across platforms (Windows, macOS, Linux, iOS, Android)
  • Work closely with cross functional colleagues, providing technical insight to drive feature development
  • Maintain high-quality code, enforce security best practices, and mentor engineers by providing comprehensive and insightful code reviews
  • Triage, debug and resolve software defects
Desired Qualifications
  • Experience developing cross platform applications with Qt
  • Proficiency in any of the following: Rust, Go, Python, Javascript, TypeScript, Git
  • Open-source contributions to networking or VPN-related projects
  • Experience implementing or improving application observability

Mozilla operates as a not-for-profit organization focused on promoting an open and accessible internet. Its main product is the Firefox browser, which emphasizes user privacy and security. Mozilla generates revenue through partnerships and search engine royalties, allowing it to reinvest in projects that enhance internet health rather than distributing profits to shareholders. This unique approach differentiates Mozilla from traditional for-profit tech companies. In addition to its browser, Mozilla offers premium services like Mozilla VPN and engages in advocacy through the Mozilla Foundation, supporting open-source projects and internet literacy initiatives. The company's goal is to empower users and create a healthier internet ecosystem.

Company Size

1,001-5,000

Company Stage

Grant

Total Funding

$3.5M

Headquarters

Mountain View, California

Founded

1998

Simplify Jobs

Simplify's Take

What believers are saying

  • Increased demand for privacy features aligns with Mozilla's mission and product offerings.
  • AI-driven features in Firefox enhance user experience and differentiate it from competitors.
  • Growing VPN demand boosts revenue from Mozilla's premium VPN service.

What critics are saying

  • Mozilla's financial stability relies heavily on its search deal with Google.
  • Delayed feature implementation compared to competitors may affect Firefox's market position.
  • Recent zero-day vulnerabilities in Firefox could impact user trust and security reputation.

What makes Mozilla unique

  • Mozilla operates as a not-for-profit, focusing on user empowerment and internet health.
  • Firefox prioritizes privacy and security, aligning with growing user awareness of data privacy.
  • Mozilla's open-source approach fosters collaboration with developers and organizations.

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Benefits

Insurance, Health & Wellness. Health Insurance.

Financial & Retirement.

401k Plan

Family & Parenting.

Work From Home.

Vacation & Time Off.

Perks & Discounts. Free Lunch or Snacks.

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

1%

2 year growth

5%
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Mozilla launches new system to detect Firefox crypto drainer add-ons.

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Mozilla releases Firefox 139.0.1 update to fix artifacts on Nvidia GPUs

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May 19th, 2025
Mozilla fixes Firefox zero-days exploited at hacking contest

Mozilla released emergency security updates to address two Firefox zero-day vulnerabilities demonstrated in the recent Pwn2Own Berlin 2025 hacking competition.

Cyber Insider
May 9th, 2025
Firefox Streamlines Add-On Consents Giving Users Better Privacy Control

Mozilla has rolled out a new data consent experience in Firefox Nightly 139, giving users clearer, more consistent information about what personal data browser extensions wish to collect - right at the point of installation.