Mozilla

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. 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. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: Firefox developers land code every day to delight users with new features and improve product performance and security. Every day, developers and managers use our team’s applications to develop, build, test, and deliver Mozilla’s core products. We are force-multipliers to enable Firefox developers to do their best work. What you’ll do: - Improve Firefox development workflows to reduce time spent testing and debugging test failures as well as more integration/automation of workflows - Work with a geographically-distributed development team - Mentor other team members and be mentored by more senior team members - Collaborate with other teams by providing code review and technical direction - Look at data, make dashboards, identify trends in Firefox development workflow What you’ll bring: - Proven Python skills, including building services - Front-end development experience, including JavaScript proficiency - Experience with Python frameworks (e.g., FastAPI, Flask, Django), Cloud Services (e.g., GCP, AWS) and REST - Solid understanding of databases and SQL - Experience with CI/CD systems (e.g., GitHub Actions, CircleCI) and test harnesses - Comfortable working cross-platform, familiar with at least 2 of: Windows, Linux, Mac, Android - A passion for enhancing developer productivity - Commitment to our values: - Welcoming differences - Being relationship-minded - Practicing responsible participation - Having grit Bonus points for: - A deep understanding of version control systems - Experience with containerization and continuous delivery/deployment, particularly with Docker - Experience with CI of large scale projects - Comfortable with data analysis What you’ll get: - 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) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3099 Hiring Ranges: Remote Germany €68.000 - €91.000 EUR

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. Our small but growing distributed team includes 65+ people across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, and paid services to build independent, privacy-respecting alternatives to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity The Marketing Specialist at MZLA executes digital marketing activities that support Thunderbird's brand awareness, user growth, and product adoption goals. Working closely with the Marketing Manager, you'll implement marketing campaigns and communications across social media, blog content, email marketing, and other digital channels. This is a hands-on role for someone who takes satisfaction in producing and publishing high-quality content, coordinating campaign activities, monitoring engagement metrics, and ensuring consistent messaging across platforms. You're a strong communicator and digital marketer who loves content creation, campaign execution, and audience engagement. You enjoy bringing marketing strategies to life through thoughtful execution, strong writing, attention to detail, and effective cross-functional collaboration. What you’ll do - Execute day-to-day social media activities, including content scheduling, publishing, monitoring, engagement, and reporting. - Draft and publish blog posts, marketing emails, newsletters, and other digital content aligned with brand voice and campaign objectives. - Support integrated marketing campaigns, product launches, and promotional activities across multiple channels. - Monitor social media engagement, coordinating with internal teams when additional context or support is needed. - Maintain editorial and campaign calendars to ensure timely delivery of marketing activities. - Track and report on performance metrics, identifying trends and optimization opportunities. - Support email marketing and automation activities, including list management, campaign setup, and workflow maintenance. - Assist with customer surveys and feedback collection to inform marketing and product insights. - Coordinate with internal teams and external vendors to support campaign execution and content development. - Ensure marketing materials align with brand standards and messaging guidelines. - Support ad hoc marketing and communications projects as needed. What you bring - 3+ years of experience in marketing, communications, digital content, or a related role. - Demonstrated experience executing social media, email, and digital marketing activities across multiple channels. - Strong writing, copyediting, and proofreading skills with the ability to adapt messaging for different audiences and platforms. - Experience with social media management tools, email marketing platforms, content management systems, and digital marketing technologies. - Strong organizational skills and attention to detail, with the ability to manage multiple priorities and deadlines. - Ability to collaborate effectively across cross-functional teams in a distributed, asynchronous environment. - Proactive mindset with the ability to take ownership of work and follow projects through to completion. - Familiarity with marketing analytics and reporting tools. - Excellent verbal and written communication skills. - Ability to learn and responsibly use emerging technologies, including AI-enabled tools, to improve workflows. - Ability to support a global organization with understanding of different cultural dynamics and practices. Bonus points for - Experience supporting marketing activities for a global technology or software audience. - Familiarity with open-source communities or privacy-focused technology products. - Experience with survey and customer feedback platforms. - Basic experience using graphic design tools such as Canva or Adobe Creative Suite. - Familiarity with SEO and digital content optimization best practices. What success looks like You'll be successful in this role if you bring organized project management that consistently meets deadlines, improve engagement on social media and grow follower counts, and increase the volume of content across blog, social, and email channels without sacrificing quality. You proactively collaborate with other teams on content generation and respond thoughtfully to comments and community engagement. Work environment This is a full-time, fully remote position. You’ll join a distributed team of Thunderbird staff, open-source community members, and contributors from around the world. We rely on clear communication, thoughtful documentation, and collaborative decision-making to work effectively across time zones and disciplines. You'll be part of the marketing team, working closely with product, engineering, and community colleagues in a collaborative, fast-paced environment. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US: $72,000 - $86,000 USD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Industry conferences - Company all-hands and team gatherings Rest & play - 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 Health & family - 401(k) contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-DNI

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. 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. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders – only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: In support of our mission to make the internet a healthier place, we aim to make Firefox the best mobile browser for security, privacy, speed, and empowering user choice. Firefox Mobile is used by tens of millions of people across Android and iOS every month. The Test Engineering team is responsible for making sure that experience is excellent – through test automation infrastructure, observability tooling, and hands-on exploratory testing. We're growing this team's scope and ambition, and we're looking for a senior leader to own it. This is a role for someone who thinks about quality the way a great product manager thinks about users: with curiosity, with ownership, and with a bias toward finding the things that matter most. You'll set our overall test strategy, lead our exploratory testing program, and manage a team of engineers building the automation infrastructure and observability tooling that keeps Firefox Mobile healthy at scale. You'll manage a team of full-time engineers plus a group of contractors, and you'll work in close partnership with our Android and iOS engineering, product, and UX teams to help us all collectively drive greater development speed, developer ease, and product quality. What you’ll do: - In concert with senior mobile leadership, you will set and own Firefox Mobile’s overall quality strategy – not as a set of metrics to report, but as a product outcome to drive. - Manage our Test Automation Engineering, ensuring we understand and prioritize the highest impact work and detect bugs earlier in the process, in deep partnership with our iOS and Android dev teams - Oversee our observability work, including dashboards and automated reporting that give engineers early visibility into quality regressions, crash trends, and product health signals. - Lead our exploratory testing work, including teaching exploratory testing skills and structuring our exploratory testing program. - Partner closely with Product, UX, and Engineering leadership to identify quality gaps and advocate for fixes – representing the user's perspective in technical conversations. - Manage and support a geographically distributed team. What you’ll bring: - 10+ years of experience in test engineering, including 5+ years in technical management roles. - A genuine philosophy about software quality – you have opinions about exploratory testing, test automation strategy, and how to build teams that actually improve products and processes. - Experience building or significantly transforming a testing practice, including hands-on knowledge of exploratory testing methods and test automation approaches. - Track record of building collaborative relationships with development teams and influencing how engineers think about quality – without owning all the testing yourself - Ability to synthesize qualitative and quantitative signals (crash rates, store ratings, user feedback, test results) into a coherent picture of product health and a clear set of priorities. - Strong communication skills and track record of effective partnership with Product, UX, and senior engineering leadership. - Able to grow and scale a distributed team members with a range of skills and backgrounds. - Commitment to our values: - Welcoming differences – Foster an inclusive and equitable team environment. - Being relationship-minded – Build trusting partnerships across Mozilla and the broader community. - Practicing responsible participation – Promote ethical and privacy-aware use of AI. - Having grit – Lead through ambiguity and pursue impactful goals with persistence and creativity. Bonus points for: - Hands-on experience with mobile testing on Android and/or iOS. - Familiarity with test automation frameworks for mobile (e.g. XCUITest, Espresso, or similar) - Experience working in open source environments - Background in or strong appreciation for user research and UX as inputs to quality What you’ll get: - 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) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: C LI-REMOTE Req ID: R3095 Hiring Ranges: Remote UK £134,000 - £178,000 GBP

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. Our small but growing distributed team includes 65+ people across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, and paid services to build independent, privacy-respecting alternatives to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity Thunderbird is growing, and we’re looking for a Technical Support Specialist to help deliver excellent support for Thunderbird users across our expanding product ecosystem, including our subscription products. This role is for someone who takes real satisfaction in resolving support requests with care, clarity, and technical precision. You enjoy working through a queue, diagnosing tricky issues, helping users get unstuck, and spotting patterns that can make support better for everyone. Every closed ticket, forum response, or app store reply represents a user who can get back to what they were trying to do. You’ll be part of the Support Operations team, working closely with support, product, engineering, documentation, and community colleagues. Your initial focus will be supporting Thunderbird’s subscription products as they scale, but you’ll also help users through community forums, app store reviews, and other support channels. This is a great opportunity for someone who loves technical support work, cares deeply about the user experience, and wants to help shape support practices for products that are still growing. What you’ll do - Manage technical support tickets from intake through resolution, with an initial focus on Thunderbird’s subscription products. - Provide timely, thoughtful, and empathetic support that helps users feel heard, understood, and effectively supported. - Troubleshoot Level 1 and Level 2 technical issues, including account setup, email configuration, SMTP, IMAP, JMAP, DNS, email authentication, and Thunderbird desktop client issues. - Triage incoming requests to determine whether the issue is user error, configuration-related, a product bug, or a feature request. - Escalate complex issues with clear reproduction steps, logs, environmental details, and user impact. - Maintain accurate and complete support records in Zendesk or similar systems. - Monitor and respond to technical questions in Thunderbird community forums. - Monitor and respond to app store reviews, initially for Android and later for iOS. - Identify recurring user pain points, documentation gaps, product confusion, and emerging trends across support channels. - Share systemic issues with support leadership, product, engineering, or documentation teams so we can improve the experience for all users. - Create and maintain user-facing documentation, FAQs, troubleshooting guides, and internal support playbooks. - Help support Thunderbird ideas, feedback, or community engagement channels. - Participate in an on-call rotation, generally one week at a time, with cadence depending on team size and operational needs. What you bring - 5+ years of technical support experience providing Level 1 and Level 2 troubleshooting for software products, web services, email systems, or IT environments. - Hands-on experience troubleshooting email protocols and client configuration issues, including SMTP, IMAP, JMAP, and account setup workflows. - Working knowledge of DNS fundamentals, including A, MX, and TXT records, as well as SPF, DKIM, and DMARC. - Familiarity with Mozilla Thunderbird or comparable desktop email clients. - 5+ years of experience using Zendesk or a similar CRM, help desk, or ticketing platform. - Strong troubleshooting skills and the ability to gather information, isolate variables, and resolve technical issues even when the initial information is incomplete. - Excellent written communication skills, with the ability to explain technical concepts clearly to users with different levels of technical knowledge. - Strong empathy, patience, and emotional intelligence when supporting frustrated or confused users. - Experience engaging with users in public or semi-public support channels, such as forums, app store reviews, issue trackers, or user communities. - A strong sense of ownership over support quality and the user experience. - Comfort working in a queue-based role with evolving processes, ambiguity, and minimal day-to-day supervision. - Ability to work remotely and asynchronously across time zones, with strong overlap with Eastern Time. - Comfort using AI tools for research, troubleshooting, technical learning, and workflow improvement while applying sound human judgment. Bonus points for - Experience with open source software communities and support models is a strong plus—you understand the collaborative, transparent ethos of open source and thrive in community-driven environments. - Familiarity with Linux, macOS, Windows, Android, and iOS. - Knowledge of email server administration, hosted email platforms, or mail infrastructure. - Experience responding to app store reviews, particularly on Google Play or the Apple App Store. - Proficiency in a second language; German is especially helpful. - Experience writing technical documentation, knowledge base articles, FAQs, or support playbooks. - Background in QA, bug triage, reproduction testing, or working closely with engineering teams. What success looks like You’ll be successful in this role if you are the kind of person who cares about both the individual user and the bigger pattern behind the issue. You don’t just answer the ticket in front of you; you notice when the same problem is showing up again and again. You document what you learn, share useful context with the team, and help reduce friction for future users. You bring patience to frustrating situations, precision to technical troubleshooting, and curiosity to ambiguous problems. You understand that support is not just about closing tickets. It is about helping people succeed, improving the product, and making the experience better for the next user. Work environment This is a full-time , fully remote position. You’ll join a distributed team of Thunderbird staff, open-source community members, and contributors from around the world. We rely on clear communication, thoughtful documentation, and collaborative decision-making to work effectively across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US: $67,000 - $77,000 USD - Canada: $57,000- $67,000 CAD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Industry conferences - Company all-hands and team gatherings Rest & play - 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 Health & family - 401(k) / RRSP contrib utions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation.