Member of Technical Staff Security Engineer
Reflection is an AI research lab building open frontier models and a full AI stack for developers, enterprises, and public-sector users.
Funding history
About Reflection
Reflection develops open-weight AI models, open-source software for customizing and running agents, AI-factory infrastructure, and related solutions. Its current research emphasizes large language models, reinforcement learning, and agentic reasoning.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will build application-security capabilities and contribute across security engineering projects. You will implement AI-agent security controls, define software supply-chain security, respond to supply-chain attacks, maintain threat models, lead pentesting, establish secure coding practices, integrate SAST into CI/CD, and implement a secure software development lifecycle.
Requirements
- Python or Golang proficiency
- Experience architecting and building complex software systems
- Knowledge of application logic exploit vectors
- Experience delivering cross-functional projects
- Experience with Kubernetes
- Experience with AWS or GCP
- Interest in infrastructure security incident detection and response and digital forensics
- Experience building programs from zero to one
Responsibilities
- Contribute to security engineering projects including AI incident detection and response
- Implement security controls for AI agents
- Define software supply-chain security strategy tooling and infrastructure
- Roll out controls for emerging supply-chain attacks
- Develop and maintain software-stack threat models
- Drive pentesting guided by threat models
- Define secure coding practices and architecture patterns for AI and ML systems
- Integrate SAST tools into CI/CD pipelines
- Define and implement a secure software development lifecycle
Benefits
- Stock options
- Medical dental vision and life insurance
- Annual wellness allowance
- Daily office lunch and dinner
- 22 weeks of paid parental leave
- Unlimited paid time off in the United States
- 30 days of vacation in the United Kingdom
- Visa sponsorship support
- Regular off-sites happy hours and team celebrations