Founding Security Engineer — AI Agent Authorization (Remote)

Aten Security; United States; Remote; USD 180,000 - 240,000; Full time

Job summary

Aten Security is seeking a founding-level security engineer to help build a runtime authorization layer for AI agents. You will work hands-on across backend, runtime, SDKs, and integrations with exposure to regulated-industry customers and a potential path to CTO based on demonstrated leadership.

Responsibilities include designing, implementing, and operating security-critical components, strengthening policy and evidence integrity, and collaborating with a small, fast-moving team to deliver

Qualifications

• Proven track record designing security-sensitive production systems.
• Ability to justify security tradeoffs and communicate them clearly.
• Experience with authorization, identity, isolation, and audit logging.

Responsibilities

• Design, build, test, deploy, and operate security-critical backend and runtime components that enforce agent authorization in production
• Strengthen authorization policy, identity and instruction provenance, evidence integrity, and high-impact action attestation
• Build secure agent-harness components across tool execution, state, identity propagation, approval gates, sandbox boundaries, retries, timeouts, and evidence capture
• Maintain SDK, API, proxy, and MCP integration paths across Go, Rust, Python, and TypeScript
• Build model and plugin supply-chain controls, including signed manifests, artifact verification, capability boundaries, and egress policy
• Improve latency, availability, observability, failure handling, and tenant isolation
• Work directly with regulated-industry and government customers, turning recurring integration needs into durable product capabilities
• Produce architecture decision records, runbooks, threat models, and test evidence that stand without oral context

Skills

Security engineering

Go

Rust

Python

TypeScript

Threat modeling

System design

Tools

Go

Rust

Python

TypeScript

Job description

Aten Security is seeking a founding-level security engineer to help build a runtime authorization layer for AI agents. You will work hands-on across backend, runtime, SDKs, and integrations with exposure to regulated-industry customers and a potential path to CTO based on demonstrated leadership.

Responsibilities include designing, implementing, and operating security-critical components, strengthening policy and evidence integrity, and collaborating with a small, fast-moving team to deliver