Infrastructure Security Engineer - Multi-Tenant Cloud Platform

Mixpeek; New York (NY); On-site; USD 140,000 - 190,000; Full time

Job summary

Modal is seeking an Infrastructure Security Engineer to design and secure the core systems powering our platform in a high-scale, multi-tenant cloud environment. You will partner with engineering teams to embed secure primitives, ensuring resilience and trustworthy-by-design infrastructure.

This hands-on role requires deep technical capability across containerization, IAM, secrets management, and cloud security, with a pragmatic, builders mindset.

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 or similar).
• 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, you design and implement, not just review.
• Pragmatic approach to security in fast-moving environments.
• Comfortable working deeply with engineers and influencing system design.

Responsibilities

• Design and improve isolation mechanisms for multi-tenant workloads (containers, sandboxing, execution environments).
• 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 (e.g., 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 with focus on consistency and portability.
• Improve network boundaries, service segmentation, and access controls.
• Embed security into infrastructure-as-code and deployment systems.
• Work closely with product and infrastructure teams to design secure systems from the ground up.
• Review architecture and code for security risks and provide actionable guidance.
• Identify patterns in risks and drive cross-cutting improvements.

Skills

Cloud-native security

Security engineering

Multi-tenant environments

Containerization

Authentication & authorization

Secrets management

Networking concepts

Developer collaboration

Isolations mechanisms

Job description

Modal is seeking an Infrastructure Security Engineer to design and secure the core systems powering our platform in a high-scale, multi-tenant cloud environment. You will partner with engineering teams to embed secure primitives, ensuring resilience and trustworthy-by-design infrastructure.

This hands-on role requires deep technical capability across containerization, IAM, secrets management, and cloud security, with a pragmatic, builders mindset.