Senior/Staff Platform Engineer

US, Remotefull timeRemote

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senior

$200k–$270k

H1B: no

horizon3ai Senior/Staff Platform Engineer at Horizon3 responsible for leading platform design and evolution of AWS, Kubernetes/EKS, and shared services. Drive cross-team initiatives to improve platform reliability, security, and developer workflows.

Responsibilities

We are looking for a Senior OR Staff Platform Engineer to join Horizon3’s Internal Platform Team (IPT) and shape the cloud and delivery foundations behind NodeZero.
Platform Strategy, Delivery & Operations
Lead the design and evolution of AWS, Kubernetes/EKS, and shared platform services.
Define architecture for infrastructure automation, service delivery, regional capabilities, and ephemeral environments.
Build reusable platform capabilities, self-service workflows, and release-safety practices.
Evolve infrastructure-as-code and declarative approaches, including Terraform and Crossplane-related capabilities.
Improve platform reliability, observability, security, performance, and operability.
Participate in on-call and incident response, leading post-incident improvements.
Technical Leadership & Collaboration
Drive high-impact initiatives across multiple teams and balance reliability, security, cost, developer experience, and delivery speed.
Establish platform standards, reduce technical debt, and guide design decisions.
Partner with feature teams to turn platform needs into durable solutions.

Qualification

8+ years in platform engineeringStrong Kubernetes experienceStrong understanding of IAMExcellent communicationInternal developer platformGitLab CI/CDEphemeral-environmentSecurity-sensitiveOur Platform StackAWS

Required

8+ years in platform engineering, infrastructure engineering, SRE, DevOps, or software engineering with substantial production-platform ownership.
Deep experience designing and operating cloud platforms, preferably AWS.
Strong Kubernetes experience, including production operations, networking, reliability, and troubleshooting.
Strong infrastructure-as-code and automation experience with Terraform, Crossplane, or comparable tools.
Experience operating CI/CD and delivery infrastructure.
Strong understanding of IAM, secrets, networking, ingress, and least privilege.
Experience with distributed-systems observability and operational practices.
Proficiency in Go and Python for platform services, developer tooling, or automation.
Demonstrated success leading complex initiatives across multiple teams.
Excellent communication, mentoring, and technical-influence skills.

Preferred

Multi-region or multi-environment SaaS platform experience.
Internal developer platform, declarative API, or Platform-as-a-Service experience.
GitLab CI/CD, self-hosted runners, OpenTelemetry, or Datadog experience.
Ephemeral-environment, automated-provisioning, or platform-lifecycle experience.
Security-sensitive, regulated, or cybersecurity experience.
Startup or high-growth company experience.
Our Platform Stack
AWS, Kubernetes, and EKS

Benefits

Dental
Vision
Equity/RSU
Parental Leave
Flexible Work

Company

horizon3ai

View company page

Source: ashby

Active within the past hour

Remote-friendly

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Must-Have Skills for This Role

AWSKubernetesEKSTerraformCrossplaneinfrastructure-as-code

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Senior/Staff Platform Engineer at horizon3ai · LumiJobs