Senior Backend Engineer - AI Agents Identity Security Team

Astrix Security protects organizations from identity-based attacks through AI agents and non-human identities that operate autonomously across cloud and SaaS environments. We're looking for a Senior Backend Engineer to architect and build the backend foundation of our AI agent security platform: designing the core systems that discover, model, and secure machine identities that outnumber humans 10:1 in enterprise environments yet remain largely invisible to traditional security tools.

Requirements: 5+ years building production backend systems, with experience in security, identity/IAM, cloud infrastructure, or related domains Strong proficiency in backend languages (Preferably Python or TypeScript) with a track record of shipping production code Proven ability to design and own complex backend systems end-to-end, especially systems involving high-cardinality data, authorization modeling, or multi-tenant architectures. You've designed data models for relationship graphs, security entities, or permission hierarchies. Deep understanding of identity and permission systems with strong technical curiosity: you can analyze new platforms to understand their identity models and API behaviors, and you're capable figuring out security implications in systems without established patterns Experience with cloud provider APIs (AWS IAM, GCP IAM, Azure AD) or the ability to master them quickly through documentation and experimentation Data modeling expertise: you've designed schemas for relationship graphs, security entities, permission hierarchies, or other complex domain models Ownership mindset: you take end-to-end responsibility for what you build and follow through from design to production