Cobalt • Remote - US (Freelancer Part Time)

Cobalt Core Pentester - US Remote-Only

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Job Description

Who We Are

The Cobalt Core is a community of highly skilled security pentesters who are passionate about what they do and are always striving to be at the top of their game. This curated community is made up of security professionals with years of experience as well as talented pentesters who are eager to hone their trade and showcase their skills. They all have a strong drive to keep up-to-date on the latest vulnerabilities and exploits, and the tools and methodologies to find them.

Cobalt Core members believe that sharing ideas and collaborating with peers is the best way to achieve great results.

If you believe you would be a good fit to join the Cobalt Core, and are eager to contribute to the community and participate in the pentests running on the Cobalt platform, please apply.

Who You Are

  • Based in the USA
  • Professional demeanor
  • Respectful towards others
  • Take pride in the work you produce
  • Strong work ethic with attention to detail
  • Desire to be an expert within your field
  • Deep understanding of application security
  • Ability to communicate effectively
  • Collaborative spirit

What You'll Do

  • Perform manual penetration testing of web applications, iOS and Android mobile applications, APIs, internal and external networks
  • Work as a member of a pentest team, collaborating and engaging directing with the client
  • Document in detail the results of assessments, audits, tests, and verification activities
  • Perform manual validation of vulnerabilities
  • Perform mobile and web app pentesting for OWASP top 10 vulnerabilities.
  • The following certifications are a plus:

Why You Should Join Us

  • Work with, and learn from, other highly skilled security researchers
  • Get to work on many different interesting projects and applications
  • Flexible work hours
  • Make the internet more secure - one application at a time
  • Professional and career development
  • Get compensated for your time

Application Process

  • Application - Becoming part of the Cobalt Core is a highly selective process, and only the best applicants will be invited to next steps in the on boarding process. Preference will be given to applicants who come referred by other Cobalt Core pentesters.
  • Chat with a Cobalt representative - Get to know about Cobalt and how we work. We will also want to know about you, your experience, strengths and what drives you. If we all think it's a great fit, we will explore how we can work together!
  • Getting setup on the Cobalt platform + Background Check & ID Verification - In this step we will make sure you are all set up for success, and we will also ask you to pass a Background Check & ID Verification.
  • Start working on cool projects!
  • Applicants need apply only once, applications are reviewed on a rolling basis.

    Please note that this is not an entry level position available only to Pentesters residing within the USA. Applicants outside of the US will not be considered if you apply through this job posting.

    Company benefits

    Enhanced maternity leave – 16 weeks paid
    Enhanced paternity leave – 16 weeks paid
    Adoption leave – 16 weeks paid
    Work from anywhere scheme
    Unlimited annual leave
    Work from home allowance
    Co-working space allowance
    Teambuilding days
    Teambuilding holidays

    The FlexScore® is the result of a rigorous 2-step verification of a company’s flexibility

    First we assess the flexibility options Cobalt provides and then we anonymously survey a statistically significant proportion of their employees to make sure Cobalt is as flexible as they say they are. Our assessment is based on the six key elements of flexibility: location, hours, autonomy, benefits, role modelling and work-life balance.

    We ask the hard questions so you don’t have to.

    Working at Cobalt

    Company employees


    Gender diversity (male:female)


    Office locations

    USA, Germany, UK

    Funding levels


    Hiring Countries

    United Kingdom
    United States
    What employees are saying

    "Part of the reason why I joined Cobalt was the flexibility – being able to work from home, take care of my dog, run errands, and also unplug after hours was important to me, and everyone at Cobalt gets it."

    Anonymous Cobalt Employee

    Awards & Achievements
    Most flexible Saas & Dev Software companies

    Most flexible Saas & Dev Software companies

    Industry awards 2022