--- title: 'Cobalt Core Pentester - US Remote-Only at Cobalt' canonical: 'https://feeny.ai/job/cobalt-core-pentester-us-remote-only-cobalt-united-states-fafheecbj5y4' type: 'job' last_seen: '2026-09-16' --- # Cobalt Core Pentester - US Remote-Only at Cobalt - **Company:** Cobalt - **Location:** United States - **Work type:** remote - **Posted:** 2021-11-10 - **Last confirmed live:** 2026-09-16 - **Apply:** https://job-boards.greenhouse.io/cobaltio/jobs/5688200002 ## Job description ## Who We Are The Cobalt Core is a community of highly skilled security pentesters who are passionate about what they do and strive to deliver quality work. 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. If you are currently residing outside of the USA, please apply [here](https://job-boards.greenhouse.io/cobaltio/jobs/4141074002). ## Who You Are - Based in the USA - Minimum of 4+ years of Pentesting or similar experience (mid-level) - 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, APIs, internal and external networks, iOS and Android mobile applications - Work as a member of a pentest team, collaborating and engaging directly 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: - CREST, PenTest+, GPEN, CEH, OSCP, AWS, CISSP, eCPPT, eWAPT, OSCE, OSWE - Please note that this is a freelance, part-time position available only to Pentesters residing within the USA. ## 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 and effort 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! - Technical Skills Assessment to demonstrate your technical acumen and reporting. - 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 a freelance, part-time 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. ## About Cobalt ## Company Overview - **One-liner**: Cobalt provides a human-led, AI-powered Pentest as a Service (PtaaS) platform that enables organizations to conduct continuous offensive security testing across their attack surface. - **Entity Type**: Private (venture-backed startup) - **Headquarters**: United States (remote-first, with Scandinavian roots and presence in US, UK, and Germany) - **Founded**: 2013 - **Founders**: Martin Rannje and Christian Hansen (co-founders, per leadership page) [cobalt.io/team] ## Core Business - **Primary industry**: Cybersecurity – specifically Penetration Testing as a Service (PtaaS) and offensive security. - **Target customers**: B2B, ranging from SMB to enterprise, with a focus on development, security, and operations teams. - **Mission**: To help organizations “operate fearlessly and innovate securely” by making security testing faster, simpler, and more transparent. [cobalt.io/about] ## Products & Services - **Cobalt Platform (PTaaS)**: SaaS platform that pairs with a vetted community of pentesters to deliver on-demand penetration tests, starting in as little as 24 hours. Includes automated reconnaissance, AI-powered exploit intelligence, and integrations with ITSM, DevOps, and collaboration tools. - **Offensive Security Services**: Penetration testing (web, mobile, network, cloud), Digital Risk Assessment (identifying publicly exposed information), and Secure Code Review. - **Cobalt Core**: An exclusive community of over 400 highly vetted pentesters (acceptance rate ~5%) who conduct thousands of tests annually. Creates a talent marketplace for on-demand security expertise. All offerings emphasize human expertise amplified by AI and a decade of proprietary exploit intelligence. [cobalt.io] ## Market Standing - **Valuation**: Not publicly available. - **Key Metric**: Over 1,500 customers served; platform delivers 2.6x faster time to report and gets customers to remediation 50% faster than traditional approaches. - **Notable Investors/Partners**: Not disclosed in provided sources. - **Growth Signals**: Fast-growing remote-first cybersecurity start-up; expanding globally with employees from 45+ nationalities; recognized as an award-winning “best workplace”; continuous product innovation in AI and automation. [cobalt.io/life][cobalt.io/about] ## Competitive Advantages - **Human-Led, AI-Powered Pentesting**: Combines creative human testing (focusing on business logic abuse) with proprietary exploit intelligence AI to automate recon and isolate high-risk vulnerabilities faster. - **Speed & Scale**: Start a pentest in 24 hours; 2.6x faster report turnaround; 50% faster remediation cycle. - **Exclusive Talent Pool**: The Cobalt Core accepts only 5% of applicants, ensuring access to top-tier, vetted security experts. - **Unified Platform**: Single pane of glass for managing findings, integrations with dev workflows, and continuous testing across the attack surface. ## Strategic Focus - **Continuous Offensive Security**: Moving away from point-in-time testing to ongoing, proactive risk management. - **AI Integration**: Leveraging over a decade of exploit data to continuously refine testing logic and improve automation. - **Scaling the Community**: Expanding the Cobalt Core and platform to address global shortage of skilled security resources. - **Customer Agility**: Empowering organizations to do more with less by integrating security testing into development cycles. ## Why Work Here - **Culture & Values**: Emphasizes “Innovate Relentlessly,” “Lead with Grit,” “Quality at Speed and Scale,” and “One Cobalt.” Fully remote, remote-first with flexible PTO. - **Perks**: Competitive compensation + equity, medical/dental/life insurance (US), 401k matching, paid parental leave, monthly stipends for wellness, WFH office setup, WiFi, and learning & development. - **Diversity**: 45+ nationalities; equal opportunity employer that values inclusion and diverse perspectives. - **Team**: Work directly with experienced senior leaders in a rapidly growing PtaaS market; opportunity to “make your mark.” [cobalt.io/life][job-boards.greenhouse.io/cobaltio] ## Sources 1. [Cobalt Homepage](https://www.cobalt.io) 2. [Careers at Cobalt (Greenhouse)](https://job-boards.greenhouse.io/cobaltio) 3. [About Cobalt](https://www.cobalt.io/about) 4. [Life at Cobalt](https://www.cobalt.io/life) 5. [Leadership Team](https://www.cobalt.io/team) ## Other roles at Cobalt - [Vice President of Engineering](https://feeny.ai/job/vice-president-of-engineering-cobalt-united-states-5nhtcnm1be2b) — United States - [Contract Executive Assistant](https://feeny.ai/job/contract-executive-assistant-cobalt-east-coast-qr9q58w79rnv) — East Coast, United States - [Contract Senior Staff Product Manager (US - East)](https://feeny.ai/job/contract-senior-staff-product-manager-us-east-cobalt-united-states-9zgckp7yjbab) — United States - [Business Development Representative - PST/MT](https://feeny.ai/job/business-development-representative-pst-mt-cobalt-united-states-1et2p7ryg6gm) — United States - [Senior GTM Systems & AI Engineer](https://feeny.ai/job/senior-gtm-systems-ai-engineer-cobalt-united-states-vye5sgzc3h31) — United States - [Business Development Representative - CST](https://feeny.ai/job/business-development-representative-cst-cobalt-united-states-va2c719etyj6) — United States - [Senior Vice President of Global Sales](https://feeny.ai/job/senior-vice-president-of-global-sales-cobalt-united-states-8svzy7arae69) — United States - [Senior Director of Sales, Enterprise](https://feeny.ai/job/senior-director-of-sales-enterprise-cobalt-united-states-90z6e1qa27yz) — United States - [Cobalt Core Pentester - UK, Germany, Nordics](https://feeny.ai/job/cobalt-core-pentester-uk-germany-nordics-cobalt-remote-gj0s13zfa5b9) - [Cobalt Core Pentester](https://feeny.ai/job/cobalt-core-pentester-cobalt-remote-evj22rth6gbk)