(Senior) Infrastructure & Security Engineer

Duna is building identity infrastructure for the global economy, with infrastructure reliability, security, and auditability central to its product. The Senior Infrastructure & Security Engineer will own and harden the AWS and Kubernetes platform, automate security and compliance controls, reduce operational toil, support safe AI agent usage, and lead incident response.

Responsibilities:

• Own and harden our platform: AWS, Kubernetes, Postgres, infrastructure as code, CI/CD, observability and incident response
• Make security the default, with least privilege, secrets management and tenant isolation built into the platform instead of bolted on later
• Turn our SOC 2 and ISO 27001 commitments into controls and evidence that are automated, not a yearly scramble
• Turn recurring operational toil into self-service systems that engineers actually adopt, from preview environments to internal access
• Help Duna run AI agents in engineering safely, with the sandboxes, guardrails and human checkpoints that make it possible
• Take calm ownership of incidents, and make sure the system gets better afterwards, not just the moment

Requirements:

• Deep, hands-on experience with AWS (or comparable), Kubernetes, infrastructure as code, CI/CD and observability
• Real security engineering skills: you turn least privilege and auditability requirements into working systems
• Comfort with the enterprise IT side of a startup, from certifications and customer security reviews to identity and device management
• High agency in ambiguity, turning a vague problem into a shipped plan
• Pragmatic judgement about when to harden, when to simplify and when to leave something alone
• Curiosity about what AI changes in how we build and run software