About Citizen

Citizen is the No. 1 public safety app in the U.S., with a mission to make the world a safer place. Citizen provides 911 alerts so people can use their phones to keep themselves, and the people and places they love, safe. Citizen has notified people to evacuate burning buildings, deterred school buses from nearby terrorist attacks, and led to the rescue of kidnapped children and missing people. 

Citizen’s 911 alerts are accompanied by live stories, real-time updates, and user-generated content so app users never have to wonder why there are helicopters overhead or fire engines passing by. By broadcasting from the scene of an incident, communicating with one another, and reading live updates, communities are empowered by Citizen. We act fast, break news, and give people the immediate information they need to stay safe. And we’re just getting started.

Already relied on by millions of people every day, Citizen will expand even further across the United States this year to keep more users safe and informed. We’re looking for hardworking, mission-driven individuals to help bring Citizen to hundreds of cities nationwide.

Citizen is backed by Sequoia Capital, 8VC, Founders Fund, Goodwater Capital, and Greycroft and has raised tens of millions in VC funding. 

Our Challenges

  • Scaling & Bursting: With thousands of users joining the platform each day, we need to ensure our systems scale to handle expanded load gracefully. On significant events, we see over a million simultaneously connected clients and their associated live streams. Our core systems need to be able to efficiently support these traffic patterns and continue to scale to millions of more users in the future.
  • Machine learning: We process thousands of hours of audio every day looking for incidents that impact our users’ safety. To do this at scale, we’ve built ML models for audio analysis and targeting using the current state of the art from academia.
  • Analytics: We want to alert users to the incidents that matter to them, in a way that scales across different geographic densities and demographics.
  • Mobile video streaming: Our app ingests high-quality video at low-latency, transcodes, and redistributes the video to external media outlets seamlessly.
  • Radio hardware: We build our own software-defined radio-based devices to consume all radio dispatch in every major city, whether analog or digital.

About the Role

  • Secure our Google cloud services and Kubernetes stacks leveraging Infrastructure-as-Code.

  • Lead our vulnerability mitigation process to ensure our codebase and systems are secure and patched.

  • Lead deep-dive intelligence analysis and investigations related to suspicious activity and attempted attacks

  • Develop and implement scalable preventative security measures (detection, monitoring, exploitation)

  • Gather data and drill down to root cause analysis, ability to recommend effective courses of containment, remediation and communicate to the various levels in the organization

  • Run application and vendor security reviews to understand the business context and security impact

  • Conduct analysis to develop forward looking assessments of the cyber threat landscape

  • Provide support during internal and external penetration testing exercises

  • Develop runbooks for common security incidents across our internal systems


  • First-hand experience working on security operations, DFIR, or an infrastructure security team.

  • Strong understanding of web or mobile application security.

  • Good understanding of security vulnerabilities in at least one technical domain

  • Able to triage and resolve security alerts with speed, collaboration, and accuracy

  • Possess in-depth experience with Google Cloud, Security Information and Event Management solutions, Intrusion Detection/Prevention Systems, Web Application Firewalls, and cloud automation tools

  • Experience in one or more of the following areas: data protection, risk management, or intellectual property theft

Preferred Qualifications

  • Experience working with Terraform or configuration management software

  • Implementing rule based monitors or security controls within a corporate environment.

  • Familiarity with DevOps and CI/CD lifecycle.

Citizen is a fully-distributed team that offers a competitive benefits package including medical, dental, vision, flexible spending accounts, paid time off, company holidays, stock options, and various wellness perks.

Citizen is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all.

Apply for this Job

* Required