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There are hundreds of cybersecurity companies telling their users what to worry about. GreyNoise is the only cybersecurity company telling users what not to worry about.

GreyNoise is an early-stage cybersecurity product company trusted by security teams all over the world. Our thousands of free users and dozens of enterprise customers use our products to:

  • Understand the Internet
  • Reduce drag in the Security Operations Center (SOC)
  • Provide insights on opportunistic threats

Every day any given SOC has hundreds or thousands of alerts to investigate. GreyNoise takes a data-driven approach to making the SOC team more efficient from within the products they are already using. (https://developer.greynoise.io/docs/3rd-party-integrations)

We operate a large network of passive collector sensors in hundreds of data centers geographically distributed all around the world. These sensors collect and analyze “Internet Background Noise” which is converted into useful insights and made accessible to our web interface and integrations.

In other words, GreyNoise is like noise canceling headphones for security teams; we tell our customers what not to worry about by eliminating pointless alerts generated by devices all around the Internet. (https://greynoise.io/query/?gnql=last_seen%3A1d)

We won’t stop until GreyNoise is a ubiquitous name in the security community.

What You Will Do:

  • Write rules that generate GreyNoise tags (https://greynoise.io/cheat-sheet/tags)
  • Develop a deep understanding of internet scanning and opportunistic exploitation
  • Play an important role in the collection, ingestion, and representation of GreyNoise data
  • Develop tools and tradecraft for finding the 'signal in the noise'
  • Finding malware, worms, and command-and-control nodes in bulk
  • Contribute to publishing formal and informal findings

A Few of Our Research and Analysis Principles

  • Technical compromises and changes are good
  • Write tests, readable code, and documentation out of respect for your colleagues
  • Data doesn’t change but how we see it does
  • Everyone makes mistakes, including actors

What You Should Bring:

  • Some cybersecurity experience (informal or formal)
  • SQL experience (Postgres, Athena)
  • Experience with Elasticsearch
  • Python and experience with or a desire to learn Golang
  • Understanding of computer networking concepts
  • Ability to communicate technical concepts

Nice to Haves:

  • 2+ years of experience desired but not required
  • Programming experience in any language(s)
  • Regex experience
  • Familiarity with VirusTotal, Shodan, and/or Censys
  • Contributions to open-source tooling
  • Vulnerability analysis and testing


  • Equity in a high-growth, seed stage startup
  • Remote-first culture
  • Unlimited paid time off
  • Medical, Dental, Life, Vision Insurance
  • 401k program
  • Equipment budget
  • Learning and development budget
  • Great swag that you actually want to wear

GreyNoise Culture

The hallmark of any great company is a palpable and viscous culture. The most important pillars of our culture are as follows:

  • Be transparent
  • Empathize deeply with the customer
  • Pain can teach us everything
  • Be clinical
  • Be honest about the good and the bad
  • Compromise is good and necessary
  • Identify what matters, ignore everything else
  • Be scrappy
  • No such thing as a million dollar idea, only million dollar execution
  • Be better than the day before

Our (work-in-progress) longform culture document: https://greynoise.io/principles


Any security product that is a “black box” that asks you to blindly trust it should raise red flags - we believe the same is true of your place of work. We obviously think GreyNoise is doing something unique, but don’t take our word for it - ask any of our over 50 enterprise customers, investors (https://tcrn.ch/3sccCq2), thousands of happy users (https://bit.ly/3sqGgbt), or dozens of journalists (https://rb.gy/r6ooti) who have cited GreyNoise over the past few years.

Why You Should Work at GreyNoise

  • You enjoy identifying and solving hard problems
  • You are comfortable taking an idea from concept to customer
  • You are open to both explaining your stance and questioning others in a clinical, open-minded, and respectful manner
  • You want to directly impact users
  • You want to grow beyond your current skill set

Why you shouldn’t work at GreyNoise

  • You need well defined processes and responsibilities
  • You prefer solving problems on your own instead of with a team
  • You like knowing exactly what to expect day-to-day
  • You don’t want to get your hands dirty
  • You want to be the smartest person in the room