Mozilla

Senior Software Engineer, Cryptography (Firefox Security)

€68,000 - €91,000 EUR per year

Full-time

today

Remote Germany

Contribute to Firefox security architecture and cryptography stack by implementing and maintaining cryptographic protocols, WebPKI, and security-sensitive web APIs; develop standards-based web platform features; and investigate and resolve stability, performance, and memory issues in a large, multi-threaded browser codebase. Requires proficiency in C/C++, familiarity with Rust, strong debugging and systems programming skills, and experience with cryptography and browser security.

Senior Software Engineer, Cryptography (Firefox Security)

CA$95,000 - CA$139,000 CAD per year

Full-time

today

Remote Canada

Work on Firefox security architecture and cryptography stack (cryptographic protocols, WebPKI, security-sensitive web APIs). Design and implement web platform security features, improve browser reliability, performance, and memory usage, and collaborate across teams. Requires strong C/C++ skills, security fundamentals, and experience debugging multi-threaded native applications; Rust experience is desirable.

Senior Machine Learning Engineer, Applied AI Modeling

$139,000 - $218,000 USD per year

Full-time

5 days ago

Remote US

Mozilla is hiring a Senior Machine Learning Engineer to conceptualize, prototype, fine-tune, evaluate, and deploy LLM-driven user-facing features in Firefox. Responsibilities include applying RAG, summarization, classification, and intent modeling, using modern ML tooling (e.g., Hugging Face, LangChain, W&B, Ray), and collaborating with product and engineering teams with attention to privacy, latency, and usability. US salary ranges listed: $139,000–$218,000 USD per year depending on location tier.

Sr Engineering Manager, Web Apps

$175,000 - $200,000 USD per year

Full-time

5 days ago

Remote US

Lead day-to-day engineering execution and people management for the Web Applications team responsible for MZLA’s hosted subscription products. Requires 15+ years industry experience (10+ years engineering leadership), strong technical depth across release readiness, reliability, CI/CD, observability, privacy/security, and experience operating in open-source and hosted SaaS environments. Remote US role with preference for candidates aligned to EST working hours; no visa sponsorship provided.

Sr Engineering Manager, Web Apps

$175,000 - $200,000 USD per year

Full-time

5 days ago

Remote

Lead day-to-day engineering execution and people management for the Web Applications team responsible for MZLA’s hosted subscription products. Responsibilities include managing engineers and contractors, budget and resource planning, defining operating rhythms, improving engineering practices (code review, testing, CI/CD, observability, release readiness), and coordinating launches and operations. Requires 15+ years industry experience (including at least 10 years engineering leadership and 5+ years people management) and experience with SaaS/hosted services, reliability, privacy/security, and open-source environments. Remote position with preference for candidates aligned with EST and no visa sponsorship provided.

Sr Engineering Manager, Web Apps

CA$155,000 - CA$180,000 CAD per year

Full-time

5 days ago

Remote Canada

Lead day-to-day engineering execution and people management for the Web Applications team responsible for MZLA/Thunderbird hosted subscription products. Responsibilities include managing engineers and contractors, budget and resource planning, translating product direction into engineering plans, establishing team processes, improving practices (code review, testing, CI/CD, observability, release and operational readiness), and coordinating cross-functional launches. Role is remote (Canada), requires significant engineering leadership experience (15+ years) and overlap with EST hours. Salary range for Canada: 155,000–180,000 CAD/year. No visa sponsorship provided.

Public Policy & Government Relations Manager

£66,000 - £87,000 GBP per year

Full-time

6 days ago

Remote UK

Remote UK role reporting to the Head of Public Policy EU. Responsible for engaging UK policymakers, building and running end-to-end policy campaigns, representing Mozilla externally, monitoring regulatory developments, and advising product teams. Requires a bachelor’s degree or equivalent and at least 5 years working on technology policy, with experience in the UK policy environment and familiarity with EU processes. Salary range listed: £66,000–£87,000 GBP per year.

Public Policy & Government Relations Manager

Full-time

6 days ago

Remote

Remote role focused on engaging UK policymakers, regulators, industry and civil society to advocate for policy frameworks supporting the open web and Mozilla products. Responsibilities include building and delivering end-to-end policy campaigns, representing Mozilla externally, monitoring UK and EU regulatory developments, coordinating subject-matter experts, and advising internal product/engineering teams. Requires a bachelor’s degree or equivalent and at least 5 years working on technology policy with demonstrated UK policy experience.

Privacy Student Worker

Full-time

12 days ago

Remote Germany

Mozilla seeks a student worker enrolled in a Bachelor’s, Master’s, or Ph.D. program in Computer Science or related fields to work on Firefox privacy features. Responsibilities include automating and fixing web-compatibility issues, improving privacy-related UI surfaces, consolidating telemetry dashboards, mitigating tracking/security issues, and prototyping smaller privacy projects. Required: programming experience in C/C++ or JavaScript, knowledge of core web technologies, strong English communication, and enthusiasm for privacy/security and open-source development. Role is remote with flexible hours; compensation varies by hours.

Firefox Security Student Worker

Full-time

12 days ago

Remote Germany

Mozilla seeks a student worker enrolled at a German university to join the Firefox Application Security Team. The role is remote (Germany) with occasional visits to the Berlin office and involves learning team processes, investigating security issues, writing test cases (HTML/JavaScript), and working on tooling or features using Python or C++. No prior security experience is required; relevant experience in web development, Python, or systems programming is expected.

Lead Privacy Counsel, Infrastructure & Data Governance

$166,000 - $260,000 USD per year

Full-time

13 days ago

Remote US

Seeking a Lead Privacy Counsel (8+ years) to operationalize privacy compliance and governance at Mozilla, including data mapping, records of processing activities, vendor privacy assessments, and incident response. The role partners with legal, security, engineering, procurement, and other teams to implement scalable privacy-by-design processes and advise on U.S., European, and international privacy and AI regulatory developments.

Lead Privacy Counsel, Infrastructure & Data Governance

Full-time

13 days ago

Remote

Remote role serving as frontline privacy counsel to design and maintain privacy compliance infrastructure (data mapping, ROPAs), operationalize global privacy governance, manage third-party privacy risk assessments (DPIAs/LIAs/TIAs), support incident response, and advise on privacy aspects of M&A. Requires J.D. (or foreign equivalent), state bar membership, and 8+ years in-house privacy and data governance experience.

Staff Operations Engineer

$139,000 - $218,000 USD per year

Full-time

13 days ago

Remote US

Mozilla is hiring a Staff Operations Engineer to lead architecture, reliability, and evolution of hybrid-cloud and workplace infrastructure. The role requires 6+ years in systems/infrastructure engineering and experience with VMware, Cisco UCS, Linux/Unix, networking (DNS, TCP/IP), data center environments, automation/IaC (Puppet/Ansible), Python, observability, and containerization. US-based remote; listed salary ranges span approximately $139,000–$218,000 USD annually across tiers.

Staff Operations Engineer

CA$116,000 - CA$171,000 CAD per year

Full-time

13 days ago

Remote Canada

Staff Operations Engineer responsible for designing and operating scalable, secure hybrid-cloud and on-prem infrastructure (compute, DNS, networking, identity, load balancers, data centers). Leads cross-team initiatives, drives migrations and reliability improvements, builds automation and IaC, mentors engineers, and maintains runbooks. Preferred experience with Puppet/Ansible, Python, observability, and containerization. Remote (Canada).

Staff Operations Engineer

€81,000 - €108,000 EUR per year

Full-time

13 days ago

Remote Germany

Lead design and implementation of scalable, reliable infrastructure across cloud, datacenter and office environments. Responsibilities include domain architecture, complex migrations and re-architectures, reliability improvements (SLIs/SLOs, monitoring, alerting), automation and IaC, networking and identity systems, cross-team collaboration, and mentoring. Required: 6+ years systems/infrastructure experience and expertise with VMware, Cisco UCS, load balancers, Linux/Unix, DNS and data center environments. Salary range listed for Remote Germany: €81,000–€108,000.

Staff Operations Engineer

Full-time

13 days ago

Remote

Mozilla is hiring a Staff Operations Engineer to own and evolve architecture within a defined infrastructure domain, lead high-impact infrastructure projects (migrations, re-architectures, performance/reliability improvements), and improve operations through automation, observability, and documentation. Requires 6+ years in systems/infrastructure roles and expertise with VMware, Cisco UCS, load balancers, Linux/Unix, networking (DNS, TCP/IP), and data center environments; IaC (Puppet/Ansible), Python, observability, and container experience are preferred.

Staff Solutions Engineer (France), Firefox Enterprise

€65,000 - €87,000 EUR per year

Full-time

14 days ago

Remote France

Mozilla seeks a Staff Solutions Engineer (France) to partner with Sales on strategic enterprise opportunities across France. Responsibilities include technical discovery, solution design, running workshops, validating interoperability (SSO/MFA/IdP, PKI, SIEM, proxies), designing pilots and rollouts, and producing reusable technical assets. Requires 7+ years experience in solutions/sales/architecture roles, native French (c2), strong English (c1), deep enterprise security and deployment knowledge, and willingness to travel within France (preference for Paris-area candidates).

Staff Solutions Engineer (France), Firefox Enterprise

Full-time

14 days ago

Remote

Customer-facing Staff Solutions Engineer to support Firefox Enterprise growth across France. Responsibilities include partnering with Sales, leading technical discovery and solution design, running workshops, designing and supporting pilots/POCs and rollouts, validating interoperability (SSO/MFA/IdP, SIEM, proxies, certificates/PKI, endpoint tooling), and creating reusable technical assets. Role requires 7+ years' experience, native-level French, strong English, willingness to travel within France, and experience with enterprise security, endpoint management, policy frameworks, and Kubernetes/Helm for customer environments.

Senior Machine Learning Engineer, AI Platform

$139,000 - $218,000 USD per year

Full-time

14 days ago

Remote US

Role on the AI Platform team responsible for core infrastructure for training, deploying, and serving ML models at scale. Responsibilities include end-to-end model serving, optimizing inference on CPU/GPU, managing GPU training and inference workloads, improving model lifecycle automation, implementing observability, and partnering with product, infrastructure, and security teams. Requires strong Python, cloud production ML experience, and distributed systems knowledge; 4+ years experience (or equivalent).

Senior Machine Learning Engineer, AI Platform

CA$116,000 - CA$171,000 CAD per year

Full-time

14 days ago

Remote Canada

Work on Mozilla's AI Platform to design, build, and operate core components for training, deploying, and serving ML models at scale. Responsibilities include end-to-end ownership of model serving and inference workflows, optimizing throughput/latency/cost for CPU and GPU workloads, managing GPU training/inference, improving model lifecycle tooling (packaging, versioning, testing, deployment), and implementing observability and incident processes. Requires strong Python experience, production ML systems knowledge, and ~4+ years' relevant experience (Bachelor’s with 4–6 years or equivalent). Salary ranges listed for Canada: Tier 1 CA$128,000–171,000; Tier 2 CA$116,000–155,000.