Infrastructure Security Engineer

Modal; New York (NY); On-site; USD 120,000 - 160,000; Full time

Job summary

A leading tech company in New York is seeking an Infrastructure Security Engineer to enhance the security of their platform's core systems. This hands-on role involves designing secure infrastructures, working closely with engineers to develop effective isolation mechanisms, and managing authentication and secrets systems. Candidates should have extensive experience in cloud-native environments, container orchestration (like Kubernetes), and a builder mentality to implement security solutions effectively.

Qualifications

• Experience securing cloud-native infrastructure and distributed systems.
• Strong understanding of containerization and orchestration systems.
• Solid foundation in networking concepts and service identity models.

Responsibilities

• Design and improve isolation mechanisms for multi-tenant workloads.
• Secure and harden containerized workloads and orchestration systems.
• Build and maintain systems for securely managing secrets and credentials.

Skills

Cloud-native infrastructure security

Containerization and orchestration (Kubernetes)

Networking concepts (segmentation, access boundaries)

Authentication and authorization designs

Job description

The Role:

We’re looking for an Infrastructure Security Engineer to design and secure the core systems that power our platform. This role focuses on building security directly into our infrastructure—from container isolation and orchestration to identity and secrets management in a multi-tenant, cloud-native environment.

You’ll work closely with engineering teams to define secure primitives and ensure our platform is resilient, scalable, and trustworthy by design.

This is a hands‑on, deeply technical role focused on real systems, not compliance or policy.

What You’ll Do:

Platform & Runtime Security

• 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

Container & Orchestration Security

• 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

Identity & Access Management

• 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

Secrets & Key Management

• 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

Cloud & Infrastructure Security

• Secure cloud environments across providers (AWS, GCP, etc.) with a focus on consistency and portability
• Improve network boundaries, service segmentation, and access controls
• Embed security into infrastructure‑as‑code and deployment systems

  Engineering Partnership

  • 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

  Requirements:

  Core Experience

  • 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

  Technical Depth

  • 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)

  Mindset

  • 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

  Preferred Qualifications:

  • Experience with sandboxing or runtime isolation technologies (e.g., gVisor, Firecracker, seccomp, or similar)
  • Familiarity with kernel-level or low-level isolation primitives
  • Experience securing Kubernetes or similar orchestration systems in production
  • Background in developer infrastructure, compute platforms, or multi‑tenant systems