Staff Platform Engineer: Cloud, Kubernetes & Automation

horizon3ai; United States; Hybrid; USD 200,000 - 270,000; Full time

Benefits offered by this job

Equity package

Health, vision, and dental insurance

Flexible vacation

Parental leave

Remote and hybrid work

Occasional travel for onsite

Job summary

horizon3ai in the United States is seeking a Staff Platform Engineer to build and evolve the cloud and delivery foundations behind an autonomous cybersecurity assessment platform. The role blends hands-on technical leadership with cross-team influence to shape platform direction, developer workflows, and operational standards.

You will lead design of AWS/Kubernetes-based services, drive infrastructure automation, and mentor engineers across a distributed org while maintaining security and

Qualifications

• 8+ years in platform engineering or related roles.
• Experience designing and operating cloud platforms, AWS preferred.
• Strong Kubernetes operations, networking, reliability.
• IaC and automation with Terraform or Crossplane.
• Hands-on CI/CD and delivery infrastructure.
• IAM, secrets management, networking, least-privilege.
• Proficiency in Go and Python.
• Excellent communication and mentoring.

Responsibilities

• Lead the design and evolution of cloud platform services on AWS/Kubernetes.
• Define architecture for infrastructure automation and ephemeral environments.
• Build reusable platform capabilities and self-service workflows.
• Improve platform reliability, observability, security, and operability.
• Participate in on-call rotation and post-incident reviews.
• Mentor engineers and raise technical standards.

Skills

AWS

Kubernetes

Go/Python

CI/CD

IAM & security

Tools

Terraform

Crossplane

GitLab CI/CD

OpenTelemetry

Datadog

Job description

horizon3ai in the United States is seeking a Staff Platform Engineer to build and evolve the cloud and delivery foundations behind an autonomous cybersecurity assessment platform. The role blends hands-on technical leadership with cross-team influence to shape platform direction, developer workflows, and operational standards.

You will lead design of AWS/Kubernetes-based services, drive infrastructure automation, and mentor engineers across a distributed org while maintaining security and