Senior​/Founding Full-Stack Engineer, Agent Systems

Our client is building AI coworkers for IT teams: a security-focused product where an agent registers as a governed identity in a customer's directory, requests scoped access per task, escalates for human approval, and drives systems it was never given an API for.

This is a backend- and systems-heavy founding engineering role where  full-stack  means owning the product and system end-to-end. You'll build the workflow engine for long-running human and agent work (durable state, retries, idempotency, approvals, replay, compensation, auditability), and design identity and authorization for humans, services, and agents (principals, delegation, scoped sessions, tenant isolation, traceable authority).

You’ll build a versioned policy engine for who or what can perform which action on which resource under what context; own secure storage and use of customer production keys, OAuth tokens, and admin credentials (isolation, rotation, episodic injection, revocation, blast-radius containment); own the boundary between probabilistic model behavior and deterministic execution (validation, evals, release gates); build isolated virtual environments and dev boxes for agents (reproducible state, observability, resource controls, safe teardown);

and ship the interfaces and APIs to author, approve, inspect, debug, and operate these systems in production.

• The workflow engine for long-running human + agent work: durable state, retries, idempotency, approvals, replay, compensation, auditability
• Identity and authorization for humans, services, and agents: principals, delegation, scoped sessions, tenant isolation, traceable authority
• A versioned policy engine (who/what can do which action on which resource, under what context)
• Secure storage and use of customer keys, OAuth tokens, and admin credentials: isolation, rotation, episodic injection, revocation, blast-radius containment
• The probabilistic-to-deterministic execution boundary: validation, evals, release gates
• Isolated virtual environments and dev boxes for agents: reproducible state, observability, resource controls, safe teardown
• The interfaces and APIs to author, approve, inspect, debug, and operate these systems in production

• Have built permission graphs, non-human identity, secrets platforms, privileged access, or delegated authorization
• Have built workflow runtimes, reconciliation systems, sandboxes, simulation/evaluation infrastructure, or developer environments
• Have been an early engineer who owned architecture, production, and customer-facing product

• Experience:
  
  4+ Years
• Equity: 1% - 2%
• Visa Sponsorship: H-1B, O-1, OPT
• Employment Type:
  
  Full-Time
• Work Type:
  In-person

• Meals in office
• Health insurance
• Unlimited PTO