Security Engineer

Endex; Austin (TX); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Health & Dental Insurance

Monthly Wellness Stipend

401K Matching

Job summary

Endex seeks a Security Engineer to identify meaningful security weaknesses across applications and infrastructure and work with product engineers to remediate them. You will help build security controls and guardrails, turning risks into tested defenses and supporting secure development practices.

The role emphasizes hands-on security depth, cloud security familiarity, and the ability to communicate findings clearly to engineering teams and compliance stakeholders.

Qualifications

• Security engineering experience with real-world application or cloud security issues.
• Ability to read code, build tooling and work with production systems.
• Ability to prioritize remediation based on impact and usage of the system.
• Able to explain findings and fixes to engineers clearly.
• Experience inspecting code and cloud systems and implementing maintainable fixes.

Responsibilities

• Secure Product Architecture: Review authentication, authorization, tenant boundaries and data flows to find weaknesses.
• Build Technical Defenses: Improve cloud identity, secrets management, app protections and checks.
• Manage Vulnerabilities: Investigate findings, prioritize remediation and verify fixes.
• Support Secure Development: Build checks and guidance into engineering workflows.
• Investigate and Learn: Analyze security incidents and improve detection/prevention.

Skills

Security engineering

Software fluency

Risk judgment

Clear communication

Practical security depth

Job description

Who We Are

Endex builds AI agents that handle complex, end-to-end work for the world's most demanding teams. Today we're deployed across leading financial institutions and Fortune 500 companies, embedded in the tools and workflows they rely on. We operate at the frontier of agentic knowledge work, partnering closely with top AI research labs and backed by the OpenAI Startup Fund. We're on a mission to build the most capable digital coworker in the world.

About the Role

Location: New York City (Primary), Denver, Chicago, Singapore (APAC), London, San Francisco, Austin, Los Angeles
Commitment: 5 Days In-Person

We're looking for an engineer who can find meaningful security weaknesses and work with the team to fix them.

As a Security Engineer at Endex, you'll build security improvements across our applications and infrastructure. You'll work directly with product engineers and compliance owners to turn identified risks into tested technical controls.

Your Key Responsibilities

• Secure Product Architecture: Review authentication, authorization, tenant boundaries and data flows to find practical weaknesses before they reach production.

• Build Technical Defenses: Improve cloud identity, secrets management, application protections and security checks with the engineering team.

• Manage Vulnerabilities: Investigate findings, prioritize remediation and verify fixes.

• Support Secure Development: Build useful checks and guidance into engineering workflows.

• Investigate and Learn: Help analyze security incidents and build detection or prevention improvements that address the underlying failure mode.

What We're Looking For

• Security Engineering Experience: You've investigated and remediated real application or cloud security issues.

• Software Fluency: You can read code, build tooling and work with production systems.

• Risk Judgment: You prioritize based on impact and the way a system is used.

• Clear Communication: You explain findings and fixes so engineers can act.

• Practical Security Depth: You can inspect code and cloud systems, verify a finding and help implement a fix that engineers can maintain.

Nice to Have

• Experience with cloud and identity security

• Experience with enterprise SaaS or AI applications

• Experience with cloud IAM, application security, threat modeling or securing AI systems

Full-Time Benefits

• Health & Dental Insurance

• Monthly Wellness Stipend

• 401K Matching