Infrastructure Security Engineer

About the Company

Antithesis is reinventing software reliability by running entire software systems inside a deterministic simulation to identify root causes of bugs instantly. They are a well-funded, deeply technical team focused on solving the verification bottleneck in the age of AI-generated code.

Responsibilities

• Design, build, and operate secure, scalable cloud infrastructure across compute, networking, and storage
• Architect multi-tenant and isolated cloud environments with strong security boundaries
• Design and implement network segmentation, private networking, and zero-trust principles
• Build and maintain authentication and authorization frameworks across internal systems
• Establish infrastructure-as-code standards and automation best practices
• Implement tenant isolation strategies and conduct threat modeling

Requirements

• 5+ years of experience in infrastructure, platform, or security engineering
• Deep experience with cloud providers (AWS, GCP, or Azure)
• Strong knowledge of cloud networking concepts (VPCs, subnets, routing, firewalls, load balancing)
• Experience implementing IAM, RBAC, and least-privilege access models at scale
• Hands-on experience with Infrastructure-as-Code tools (Terraform, Pulumi, CloudFormation)
• Experience designing highly available, fault-tolerant systems

Preferred Qualifications

• Experience in high-growth or multi-tenant SaaS environments
• Background in security engineering or compliance frameworks (SOC 2, ISO 27001)
• Experience with secrets management, KMS, or certificate management
• Experience implementing monitoring and observability systems