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Senior Staff Software Engineer, Security

XOXO AISouth Park, SF
On-site Full-time

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Experience Level

Experience

Qualifications

Skills & QualificationsMinimum qualifications:Demonstrated experience in delivering security or infrastructure systems from design to production, achieving measurable improvements in risk management, reliability, or incident outcomes. In-depth knowledge of cloud hardening practices, including configuration baselines and network topology (subnets/firewalls) with a focus on policy enforcement. Robust generalist software engineering background, with the ability to assess production code for security vulnerabilities. Hands-on experience securing web applications and APIs, with particular emphasis on authentication workflows, access control mechanisms, secrets management, and input validation.

About the job

About Us

XOXO AI is an innovative research laboratory dedicated to shaping the future of intelligence for everyday life. Our dynamic team of skilled engineers, designers, and researchers is committed to discovering transformative solutions for challenges that extend beyond the workplace.

Following a significant breakthrough in infrastructure, architecture, and model layers, we are on the lookout for dedicated builders to develop the interface and application layer that will actualize our visionary goals.

About the Role

We are seeking a seasoned Security Engineer to safeguard our systems and uphold user trust. Your role will involve fortifying our cloud infrastructure, enforcing access restrictions, and establishing tools and response mechanisms that ensure security as we scale. Collaborating with the founders and our engineering team, you will embed security as a fundamental principle in our development processes.

What You’ll Do

  • Collaborate with engineering, product, and research teams to integrate security throughout the development lifecycle, including threat modeling, design reviews, and secure defaults.

  • Strengthen cloud infrastructure and enforce network topology standards such as subnets, firewalls, routing, and organizational security policies.

  • Implement isolation and segmentation strategies to limit potential damage and prevent lateral movement.

  • Develop and maintain security tools and automation for engineers, including CI/CD checks, scanning, and guardrails, driving findings to remediation.

  • Enhance observability, detection, and incident response for security-related events such as intrusions, abuse patterns, DDoS attacks, and bots, ensuring rapid containment.

  • Design and manage identity and access management systems for both users and services, alongside third-party integration controls, prioritizing private connectivity and the principle of least privilege.

About XOXO AI

At XOXO AI, we are pioneering the intersection of research and technology to create intelligent solutions that enhance everyday life. Our collaborative environment fosters innovation, and we are committed to tackling complex challenges with cutting-edge technology.

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