Senior Security Engineer – Pentester

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Menlo Security Inc.

WebsiteLinkedInAll Job Openings

201 - 500 employees

🔒 Cybersecurity

🏢 Enterprise

💰 $100M Series E on 2020-11

Cybersecurity • Enterprise

Menlo Security Inc. is a cybersecurity company focused on providing advanced internet security solutions for enterprises. They specialize in securing browsers across hybrid enterprise environments to prevent phishing and malware attacks. Menlo Security offers a cloud-based browser security solution that transforms any browser into a secure enterprise browser, helping organizations protect against highly evasive adaptive threats, zero-hour phishing, and ransomware. Their zero-trust access architecture enables safe internet use and secure application access, supporting over 800 customers globally, including financial institutions and government agencies.

📋 Description

• Conduct deep-dive penetration tests of products across AWS and GCP environments, working with a peer pentester • Review IAM policies, service configurations, and cloud-native permission structures across the Control Plane against security baselines • Execute dynamic testing against web interfaces and API endpoints across the Data Plane and Web UI • Assess the security posture of hybrid infrastructure spanning containers and virtual machines • Triage findings and create clear, reproducible proofs of concept • Partner with product teams to explain risk and drive remediation • Use AI and large language models to automate reconnaissance, generate attack vectors, analyze configurations, and draft vulnerability reports • Monitor bug bounty pipelines and external reports, validate findings, and manage researcher communication • Ensure product features and multi-cloud infrastructure are rigorously security-tested before release • Track assessment coverage, triage speed, vulnerability escape rates, AI-assisted time savings, and report quality

🎯 Requirements

• Deep architectural understanding of GCP and AWS • Ability to perform manual reviews of complex IAM and resource hierarchies • Experience with native cloud APIs or CSPM frameworks • Proven experience auditing and hardening GKE Autopilot/Standard, EKS, ECS, Kubernetes, k3s, and OCI-runc workloads • Demonstrated ability to integrate AI/LLM tools such as Gemini and Claude into the pentesting lifecycle • Expert knowledge of web application security and offensive testing methodologies • Deep proficiency in OWASP Top 10 vulnerabilities, modern web framework exploitation, and REST/WebSocket API security • Extensive hands-on experience with Burp Suite Professional, OWASP ZAP, or similar tools • Understanding of CSP, CORS, SameSite cookies, Subresource Integrity, OAuth 2.0, OIDC, JWT, HSTS, X-Frame-Options, and Permissions-Policy • Ability to identify complex flaws beyond automated scanners and validate them with proofs of concept • Proficiency in Python, Go, or Bash • Solid grasp of Terraform, cloud-native deployment patterns, and HCL auditing • Ability to write high-quality technical reports for product teams • Experience with Gatekeeper policies and Binary Authorization is preferred

🏖️ Benefits

• Base salary range of 158,000 CAD - 237,000 CAD • Eligibility for stock-based compensation grants based on company and individual performance • Collaborative, inclusive, and fun culture • Opportunities to take initiative and implement new ideas • Open communication and support for new ideas