9 offensive security developer jobs at 7 companies in Illinois

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Lead Offensive Security Engineer
Naperville, Illinois, United States
$121k-$181k/yr OnsiteFull Time
Ecolab
EcolabNYSE: ECL: Provides water, hygiene, and infection prevention solutions and services.
8+ YOEBachelor's degree,8+ years in offensive/application/cloud/IoT security,hands-on penetration testing experience,team leadership,Azure/AWS/GCP familiarity and application security tooling proficiency.
Snyk, Wiz, Burp Suite, OWASP ZAP, GitHub Advanced Security, Nmap, Horizon3 NodeZero, DAST, SAST, SCA, Microsoft Azure, AWS, GCP, Kubernetes
3d
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Senior Offensive Security Engineer
Naperville, Illinois, United States
$101k-$152k/yr OnsiteFull Time
Ecolab
EcolabNYSE: ECL: Provides water, hygiene, and infection prevention solutions and services.
5+ YOEBachelor's degree,5+ years hands-on offensive/application/cloud/IoT security testing,experience with Azure/AWS/GCP,tooling familiarity,mentoring and reporting skills.
Snyk, Wiz, Burp Suite, OWASP ZAP, GitHub Advanced Security, Nmap, Horizon3 NodeZero, DAST, SAST, SCA, Microsoft Azure, AWS, GCP, Kubernetes
1mo
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WebApp Offensive Security Engineer
United States or Chicago
$196k-$242k/yr RemoteFull Time
Horizon3.ai
Horizon3.ai: Autonomous penetration testing platform for continuous security assessment.
Extensive hands-on web application penetration testing experience, ability to reproduce and validate edge-case exploits, strong communication, proxy tool experience (Burp Suite), scripting (Python), and history of security research or bug bounty contributions.
NodeZero, Burp Suite, Python, Nuclei, sqlmap, LangChain, LangFlow, Postgres, Neo4j, Jira, Model Context Protocol (MCP)
2mo
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Security Engineer
Chicago, Illinois, United States
$145k-$195k/yr OnsiteFull Time
Coinflow
Coinflow: Enables instant global payments using stablecoins and blockchain technology.
4+ YOE4+ years in security engineering or DevSecOps; hands-on offensive and defensive security; SIEM; code experience in TS/Node; vulnerability management; AI-native tooling.
Datadog, Splunk, Elastic, Panther, TypeScript, Node.js, Rust, Go, Python, Claude Security, Claude Code, SAST, DAST, CI/CD
1mo
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Senior Product Security Engineer II
United States or California or New York or Connecticut or New Jersey or Washington or Oregon or Delaware or Maine or Massachusetts or Maryland or New Hampshire or Rhode Island or Vermont or District of Columbia or Pennsylvania or Virginia or Colorado or Texas or Illinois or Hawaii or Canada
$192k-$243k/yr RemoteFull Time
Instacart
InstacartNasdaq: CART: Provides grocery delivery and retail technology solutions.
37+ YOEExperienced security engineer/penetration tester able to design and run offensive security engagements, conduct threat modeling and assessments, prioritize security initiatives, and create technical documentation for cross-functional teams.
1mo
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Staff Attack Engineer, OCI
Chicago or United States
$247k-$275k/yr RemoteFull Time
Horizon3.ai
Horizon3.ai: Autonomous penetration testing platform for continuous security assessment.
10+ YOE10+ years engineering or offensive security experience, hands-on OCI offensive security experience, strong cloud attack path knowledge, Python coding, web and cloud pentesting experience, strong research and documentation skills.
Python, NodeZero, Oracle Cloud Infrastructure (OCI), Oracle Kubernetes Engine (OKE), Kubernetes, AWS, Azure, GCP
3w
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Senior Penetration Testing Engineer
Chicago, Illinois, United States
$93k-$144k/yr HybridFull Time
Alliant Credit Union
Alliant Credit Union: Provides digital banking, consumer loans, and mortgage lending services.
3+ YOEBachelor's in CS/related or 6 years' equivalent; minimum 3 years penetration testing/offensive security; preferred offensive security certifications; strong communication and reporting skills.
1mo
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Forward deployed engineer Chicago
Chicago, Illinois, United States
FieldFull Time
Aikido Security
Aikido Security: Developer-first security platform for code, cloud, and runtime.
Strong infrastructure and networking fundamentals (Docker, DNS, TLS), Linux debugging, ability to read Go/TypeScript/Python, familiarity with enterprise networks, basic offensive security knowledge, strong communication; must live in Chicago.
Docker, Postgres, Go, TypeScript, Python, Linux, AWS, Azure, GCP, SSO, IdP, PKI, DNS, TLS
3w
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Senior Red Team Operator
Minneapolis or Atlanta or Cincinnati or Cupertino or Portland or New York or Chicago or Englewood or Charlotte or Irving
$133k-$157k/yr HybridFull Time
U.S. Bank
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
8+ YOEBachelor's degree or equivalent, 8+ years in information security with offensive security/Red Team experience; expertise in exploit development, offensive tooling, and scripting; strong communication and leadership.
Cobalt Strike, Metasploit, Mythic, Sliver, Python, PowerShell, C/C++, C#, Go, Shell, EDR, XDR, Infrastructure as Code (IaC)