Offensive Security Engineer

📋 Job Overview

The Security Team is responsible for providing key security capabilities covering application, cloud and enterprise security, incident response, detection and GRC. Our team is looking for an experienced, hands-on security practitioner, who will drive the adoption of modern security processes and tooling, with focus on supporting our engineering and product teams in improving the security posture of our platforms and services.

🏢 About ClickHouse

ClickHouse is a globally distributed company and remote-friendly. We currently operate in over 25 countries.

🎯 The Role

As an Offensive Security Engineer, you will identify security gaps and vulnerabilities in all ClickHouse offerings, improve and develop security assurance activities, plan and execute internal red team assessments, and handle information security events and incidents across ClickHouse products and services.

✅ Key Responsibilities

• Identify security gaps and vulnerabilities in all ClickHouse offerings
• Triage a wide range of vulnerabilities reported via our bug bounty program, responsible disclosure, GitHub Issues
• Improve and develop security assurance activities - pentests, vulnerability assessments, bug bounty programs, fuzzing
• Plan and execute internal red team assessments and penetration tests against ClickHouse infrastructure
• Assess AI/LLM-specific attack surface across ClickHouse's own AI-powered features
• Build and operate agentic tooling for reconnaissance, exploit-chaining and attack-path discovery
• Partner with detection engineering to validate and improve detection coverage
• Handle information security events and incidents across ClickHouse products and services
• Develop processes, tooling and automation to scale security processes and mitigate risks

📌 Required Qualifications

• 7+ years of experience in pentesting, red teaming and product security
• Experience supporting engineering and product implementation efforts by performing threat assessments, assurance activities, advisory
• Hands-on experience conducting offensive security engagements - internal red teaming, penetration testing and adversary simulation
• Ability to design adversary scenarios grounded in real threat intelligence
• Strong written and verbal communication skills
• Experience building or adapting agentic and LLM-assisted tooling for offensive security use cases
• Familiarity with AI/LLM-specific vulnerability classes and testing methodology
• Strong knowledge of and experience with one or more cloud service providers, Kubernetes, Cilium
• Experience implementing and operating engineering security tools and processes
• Security as code mindset, with focus on solving problems with automation and scale in mind

⭐ Desirable Experience

• BS, MS, or PhD in Computer Science or related field
• Previous contributions to open source projects
• Security or cloud related certifications (AWS, GCP, Azure)
• Previous experience in using AI security harnesses for pentesting purposes
• Experience building or operating internal red team tooling and infrastructure from scratch
• Offensive security certifications (e.g. OSCP, OSCE, OSEP, OSWE)

🎁 Benefits

Flexible work environment - ClickHouse is a globally distributed company and remote-friendly.
Healthcare - Employer contributions towards your healthcare.
Equity in the company - Every new team member who joins our company receives stock options.
Time off - Flexible time off in the US, generous entitlement in other countries.
A USD$500 Home office setup if you’re a remote employee.
Global Gatherings – We believe in the power of in-person connection and offer opportunities to engage with colleagues at company-wide offsites.
Culture - We All Shape It
As part of a rapidly scaling start-up, you will be instrumental in shaping our culture.

🛂 Visa & Eligibility

ClickHouse provides equal employment opportunities to all employees and applicants and prohibits discrimination and harassment of any type based on factors such as race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.