Platform Security Engineer - Cloud-Native & Multi-Tenant

The available sources do not contain information about the company name for rounx.com.; United States; On-site; USD 150,000 - 230,000; Full time

Job summary

Modal is seeking an Infrastructure Security Engineer to design and secure the core systems powering our platform. You’ll work on container isolation, multi-tenant security, and identity and secrets management in a cloud-native environment.

You’ll partner with engineering to embed security into infrastructure-as-code, Kubernetes, and deployment pipelines, balancing strong protection with fast, scalable delivery.

Qualifications

• Experience securing cloud-native infrastructure and distributed systems in production.
• Background in infrastructure, backend, or security engineering.
• Experience working in multi-tenant or high-scale environments.
• Strong understanding of containerization and orchestration systems (e.g., Kubernetes).
• Experience designing or securing isolation mechanisms in multi-tenant systems.
• Solid understanding of authentication, authorization, and service identity models.
• Experience with secrets management and secure handling of credentials.
• Strong foundation in networking concepts (segmentation, service communication, access boundaries).
• Builder mentality to design and implement, not just review.
• Pragmatic approach to security in fast-moving environments.

Responsibilities

• Design and secure platform isolation mechanisms for multi-tenant workloads.
• Strengthen boundaries between customers, workloads, and internal systems.
• Identify and mitigate risks in distributed, dynamic compute environments.
• Secure and harden containerized workloads and orchestration systems (Kubernetes or similar).
• Improve workload isolation, scheduling boundaries, and runtime protections.
• Evaluate tradeoffs in multi-tenant execution models.
• Design and improve authentication and authorization systems across services.
• Implement strong service-to-service identity and least-privilege access patterns.
• Improve access controls across infrastructure and internal systems.
• Build and maintain systems for securely managing secrets, tokens, and credentials.
• Improve rotation, auditing, and access controls.
• Reduce secret sprawl and integrate secure patterns into developer workflows.
• Secure cloud environments across providers (AWS, GCP, etc.).
• Improve network boundaries, service segmentation, and access controls.
• Embed security into infrastructure-as-code and deployment systems.
• Work with product and infrastructure teams to design secure systems from ground up.
• Review architecture and code for security risks and provide actionable guidance.
• Identify patterns in risks and drive cross-cutting improvements.

Skills

Cloud infra security

Distributed systems security

Container security

Kubernetes security

Authentication & Authorization

Secrets management

Networking basics

Multi-tenant design

DevSecOps mindset

IaC security

Job description

Modal is seeking an Infrastructure Security Engineer to design and secure the core systems powering our platform. You’ll work on container isolation, multi-tenant security, and identity and secrets management in a cloud-native environment.

You’ll partner with engineering to embed security into infrastructure-as-code, Kubernetes, and deployment pipelines, balancing strong protection with fast, scalable delivery.