Monitor and mitigate security incidents across Mozilla products; act as incident commander, design and maintain alerts/playbooks/automation, conduct threat hunting and threat intelligence triage, and participate in on-call rotation. Requires 5+ years managing security incidents or SOC/PSIRT/CSIRT experience and expertise with SIEM (Splunk/ELK/BigQuery), EDR, SOAR (Tines/Splunk SOAR), and cloud platforms (GCP/AWS/Azure).

Mozilla is hiring a Senior Security Engineer (Incident Responder) to identify and respond to security incidents at scale, act as incident commander, design and maintain alerts, automated actions, playbooks and escalation workflows, conduct threat hunting, triage threat intelligence, and participate in a 24/7 on-call rotation. Required experience includes 5+ years in incident management or SOC/PSIRT/CSIRT roles and proficiency with SIEM (Splunk preferred), EDR, SOAR platforms, and cloud platforms (GCP, AWS, Azure, Heroku).

Mozilla is hiring a Senior Security Engineer / Incident Responder to monitor and mitigate attacks across Mozilla products and services. Responsibilities include acting as incident commander, maintaining alerts, automation, playbooks and escalation workflows, conducting threat hunting, triaging threat intelligence, and participating in a 24/7 on-call rotation. Requires 5+ years experience in incident management/SOC roles and proficiency with SIEM (Splunk preferred), EDR, SOAR, and cloud platforms. Salary range for Remote Sweden provided in posting.

Mozilla is hiring a Senior Security Engineer (SecOps) to monitor and mitigate security incidents, act as incident commander, develop alerts/automation/playbooks, conduct threat hunting and threat intelligence, and partner with stakeholders. Requires 5+ years of incident management or SOC/PSIRT/CSIRT experience and hands-on expertise with SIEM (e.g., Splunk, ELK, BigQuery), EDR, SOAR platforms, and cloud environments (GCP, AWS, Azure, Heroku).

Mozilla is hiring a Senior Security Engineer (SecOps) to monitor and mitigate attacks, act as incident commander, design alerts/playbooks/automations, conduct threat hunting, and manage threat-intelligence workflows. Requires 5+ years in incident response or SOC/PSIRT/CSIRT roles, strong SIEM (Splunk/ELK/BigQuery) and EDR experience, familiarity with SOAR (Tines, Splunk SOAR), cloud platform experience (GCP/AWS/Heroku/Azure), and participation in an on-call rotation.

Mozilla is hiring a Senior Security Engineer (Incident Responder) to identify and respond to security incidents at global scale, act as incident commander, build alerts/playbooks/automations, conduct threat hunting, and work on-cloud and endpoint telemetry. Requires 5+ years of relevant incident response/SOC experience and proficiency with SIEM (Splunk preferred), EDR, and SOAR platforms.

The Staff Software Engineer, Web Application Services will lead technical architecture and development for new web-based products (calendar, secure file storage/transfer) extending Thunderbird. Responsibilities include design and implementation, establishing software patterns, building analytics/infrastructure, mentoring engineers, and collaborating across distributed teams and community contributors. The role is full-time, fully remote, requires 10+ years of experience, strong JavaScript skills and proficiency in at least one other language (e.g., Python, Rust, Go, C++), and periodic international travel.

Lead technical architecture and implementation for web-based Services (e.g., calendar, secure file storage). Contribute code, prototypes, infrastructure and analytics; make technology decisions; mentor other engineers; collaborate with cross-functional and community contributors. Requires 10+ years web development experience and expert JavaScript plus experience in at least one of Python, Rust, Go, or C++.

Lead the technical architecture and development of Thunderbird Web Services (examples: calendar, secure file storage). Responsibilities include writing code and prototypes, establishing software patterns, building analytics and infrastructure, mentoring engineers, and collaborating remotely across product, design, QA, and community contributors. Full-time, fully remote role for applicants residing in and authorized to work in Canada; no visa sponsorship provided. Periodic international travel may be required.

Lead architecture and hands-on development of Mozilla's Salesforce platform for enterprise product lines, build Sales Cloud from implementation through go-live, own platform operations, design lead-to-cash and security models, integrate with NetSuite/BigQuery/other systems, and deliver MCP/AI integrations. Requires at least 8 years of Salesforce engineering/architecture experience and hands-on Apex, SOQL, and Lightning Web Components skills.

Mozilla is hiring a Senior Strategic Account Executive (DACH) to grow Firefox Enterprise across Germany, Austria, and Switzerland. The role owns full sales cycles—from sourcing and qualification to negotiation and close—focusing on pipeline creation with large enterprises, regulated organizations, and public-sector-related accounts. Requires significant enterprise SaaS/infrastructure/security sales experience, collaboration with solutions engineering, and strong English and German communication skills (German native level). Salary range listed for Remote Germany: €88,000–€118,000.

Mozilla is hiring a Senior Software Engineer to design, build, deploy, and operate backend services for Ecosystem Services. The role emphasizes end-to-end ownership, collaboration with frontend, CloudEng and product teams, on-call production support, observability (OpenTelemetry, Sentry, Prometheus, Grafana), and hands-on GCP and Docker-based deployment experience. Required: 4+ years backend development experience with Python, TypeScript/Node.js, or Rust and familiarity with PostgreSQL and SQL optimization.

Mozilla is hiring Senior Software Engineers for multiple Ecosystem Services backend teams to design, build, deploy, and operate backend platforms focused on privacy, security, and reliability. The role requires end-to-end ownership of services, collaboration with cross-functional teams, on-call rotation, and hands-on experience with backend languages (Python/TypeScript/Node.js or Rust), PostgreSQL, Docker, and GCP-based deployments and observability tooling.

Join Mozilla's Ecosystem Services Team to build, operate, and maintain back-end platforms used by Firefox and other Mozilla products. Responsibilities include backend development, cloud deployments and operations (GCP/Docker), observability and monitoring (OpenTelemetry, Sentry, Prometheus, Grafana), participating in on-call rotations, API design, and collaborating with frontend, CloudEng, product, and UX teams. Requires 4+ years of software development experience with strong backend focus and professional experience in Python, TypeScript/Node.js, or Rust, plus PostgreSQL and hands-on GCP/DevOps experience.

Post-sales strategic account and customer success role for Firefox Enterprise focused on building relationships, guiding customers from pilot to deployment and adoption, owning renewals and expansion, and coordinating cross-functional teams. Requires native-level German, advanced English, experience with enterprise customer relationships, and willingness to travel across Germany, Austria and Switzerland.

Mozilla seeks a Strategic Account Manager for Firefox Enterprise to build and maintain relationships with business and government customers in France, drive adoption, manage renewals and retention, identify expansion opportunities, coordinate with internal teams (Sales, Support, Product, Solution Engineering), and conduct business reviews and success planning. The role requires strong English and French communication skills and willingness to travel within France.

Mozilla seeks a Strategic Account Manager to be the primary contact for assigned enterprise accounts in France, build long-term relationships, manage renewals and retention risks, coordinate cross-functional teams, and pursue expansion opportunities. The role requires strong experience in enterprise SaaS/platform/security account management or related customer-facing roles, fluency in English and French, and willingness to travel within France and occasionally align with U.S. business hours.

Mozilla seeks a Strategic Account Manager for Firefox Enterprise (DACH) to own post-sales strategic accounts across Germany, Austria, and Switzerland. Responsibilities include primary account ownership, success planning from pilot to rollout, renewal and expansion planning, business reviews, risk identification/mitigation, and coordinating cross-functional teams. Requires native German and advanced English, experience with enterprise customer relationships, and willingness to travel within DACH.

Remote Staff Solutions Engineer focused on enterprise customers in the DACH region to lead technical discovery, solution design, pilots/proofs of concept, and rollout plans for Firefox Enterprise. Requires 7+ years in senior technical/customer-facing roles and strong expertise in enterprise security, endpoint management, identity integrations (SSO/MFA/IdP), PKI/TLS, SIEM/DLP/CASB, and Kubernetes/Helm.

Remote senior enterprise sales role focused on developing new opportunities across DACH, owning the full sales cycle from sourcing to contract signature, working with solutions engineering, and engaging senior technical and business stakeholders. Requires significant enterprise sales experience and strong written and verbal skills in German (native) and English.