Remote Senior Infra Security Engineer — Zero‑Knowledge

1kx Network; Northern (KY); Hybrid; USD 140,000 - 180,000; Full time

Job summary

Matter Labs in the United States is seeking a Senior Infrastructure Security Engineer to secure the corporate and production infrastructure powering ZKsync. You will own identity, endpoint, and detection-and-response defenses, partnering with IT Ops, DevOps, Protocol Security, and Engineering to ensure security is built in by default.

This role suits someone who enjoys building durable detections, protecting open-source, decentralized infrastructure, and leading security responses end-to-end.

Qualifications

• 5+ years of hands-on infrastructure or detection-and-response security experience.
• Production experience securing cloud-based identity and collaboration platforms with policy work, governance, and incidents.
• Hands-on experience with a modern SIEM and SOAR: detections, log onboarding, response playbooks.
• Strong cloud security background including IAM, network controls, workload identity, guardrails.
• Experience securing a macOS-dominant endpoint fleet with MDM and EDR.
• Familiarity with Infrastructure as Code, secrets management, and security automation.
• Real incident response experience with on-call leadership.
• Clear technical communication across teams.

Responsibilities

• Identity & Collaboration Security: manage identity policies, third-party app governance, DLP, MFA, admin audit.
• Detection & Response: build and tune detections, write runbooks, onboard new log sources.
• Cloud & Infrastructure Security: harden cloud footprint, Kubernetes, CI/CD, guardrails with DevOps.
• Endpoint Security: manage MDM, baseline hardening, EDR tuning, telemetry.
• Incident Response: lead investigations end-to-end, containment, forensics, post-mortems.
• Secure Systems Design: run threat models and architecture reviews, translate to prioritized work.
• Cross-Team Collaboration: work with Protocol Security, DevOps, IT Ops, and Product Engineering.

Skills

Security engineering

Cloud security

Incident response

IAM

MDM

IaC security

Detections engineering

SOAR

Tools

SIEM

SOAR

Kubernetes

Terraform

CI/CD security

Job description

Matter Labs in the United States is seeking a Senior Infrastructure Security Engineer to secure the corporate and production infrastructure powering ZKsync. You will own identity, endpoint, and detection-and-response defenses, partnering with IT Ops, DevOps, Protocol Security, and Engineering to ensure security is built in by default.

This role suits someone who enjoys building durable detections, protecting open-source, decentralized infrastructure, and leading security responses end-to-end.