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Senior Security Engineer - SecOps

Mozilla· Infrastructure
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Hybrid (Spain)€58k - €77kfull-timePosted 3w ago

About the role

Incident Responder role at Mozilla, focusing on monitoring and mitigating attacks across Mozilla’s products and services. Part of a flexible team handling security incidents with strong communication and collaboration across diverse stakeholders to keep Mozilla users safe.

Responsibilities

  • Identify and respond to security incidents on a global scale.
  • Act as an incident commander to drive incidents through the entire response lifecycle.
  • Design and maintain a portfolio of security alerts, automated actions, playbooks and escalation workflows in support of a high-performing 24/7 incident response capability.
  • Conduct threat hunting activities, anticipate future threats, and maintain forward-thinking strategies for tools/technology/processes that combat sophisticated threat actors.
  • Research threat intelligence reports, triage and manage resulting workflows.
  • Partner with key stakeholders and communicate effectively to maintain a continuously improving feedback loop of preparation, identification, analysis, containment, and post mortem activities.
  • Participate in on-call rotation.

Qualifications

  • 5+ years of demonstrated ability managing security incidents at a global scale and/or experience working in Security Operations Centers (SOC), Product Security Incident Response Teams (PSIRT), and Computer Security Incident Response Teams (CSIRT).
  • Expertise with security information and event management (SIEM) systems (e.g. ELK, Google BigQuery, Splunk, etc.). Splunk proficiency is preferred.
  • Expertise with endpoint detection and investigation. Hands-on experience with leading EDR tools and demonstrated ability to leverage endpoint telemetry to find root cause.
  • Expertise with security orchestration and automation (SOAR) platforms such as Tines or Splunk SOAR.
  • Superb communication and leadership capacity; ability to partner effectively with diverse company stakeholders.
  • Real-world experience in software development and/or engineering operations for consumer products and services; B.S. in a technology-focused field is helpful.
  • Practical experience working with cloud technologies (e.g. Google Cloud Platform, Amazon Web Services, Heroku, Microsoft Azure, etc.).

Skills

Required:Security incident managementSIEMEndpoint detection and investigationSOARCommunication and leadershipCloud technologies
Nice to have:Software development / engineering operations

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)
Last updated Sep 30, 2026. Interested? Apply on the company site.

About Mozilla

Internet for people, not profit

Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online.

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