Staff Platform Engineer

Horizon3.ai

. Lead the design and evolution of AWS, Kubernetes/EKS, and shared platform services .

Posted 9/24/2026full-timeRemote • United StatesLead💰 $199,750 - $270,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and operating cloud platforms, particularly AWS, with a strong focus on infrastructure automation, reliability, and security. Proficient in leading cross-team initiatives and mentoring engineers to enhance platform capabilities and developer experience.

Highest-signal resume keywords

AWS Platform EngineeringKubernetes OperationsInfrastructure-as-Code with TerraformGo and Python ProficiencyCI/CD Infrastructure Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Platform EngineeringInfrastructure EngineeringSite Reliability Engineering (SRE)DevOps PracticesCloud Platform DesignAutomation with TerraformDistributed Systems ObservabilityIAM and NetworkingProduction OperationsTroubleshooting

Soft Skills

Excellent CommunicationMentoring SkillsTechnical Influence

Tools & Technologies

TerraformCrossplaneGitLab CI/CDOpenTelemetryDatadog

Industry Keywords

Multi-Region SaaS PlatformsPlatform-as-a-ServiceSecurity-Sensitive EnvironmentsRegulated IndustriesStartup Experience

Tech Stack

Tools & technologies

AWSCloudCyber SecurityKubernetesPythonTerraformGo

About the role

Key responsibilities & impact

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
Drive high-impact initiatives across multiple teams while balancing 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
Mentor engineers and raise the technical bar across Engineering
Improve documentation, runbooks, interfaces, and self-service paths
Communicate and build alignment across Platform, Application Engineering, Data Engineering, Product, Program Management, and Security

Requirements

What you’ll need

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
Preferred: internal developer platform, declarative API, or Platform-as-a-Service experience
Preferred: GitLab CI/CD, self-hosted runners, OpenTelemetry, or Datadog experience
Preferred: ephemeral-environment, automated-provisioning, or platform-lifecycle experience
Preferred: security-sensitive, regulated, or cybersecurity experience
Preferred: startup or high-growth company experience
Must be legally authorized to work in the United States
Exact tool matches are less important than strong platform fundamentals, sound judgment, and end-to-end ownership of production systems

Benefits

Comp & perks

Equity package in the form of stock options for all full-time roles
Health, vision, and dental insurance for you and your family
Flexible vacation policy
Generous parental leave
Career development opportunities
Inclusive and collaborative culture
Remote and hybrid work models depending on role and location
Occasional company onsite meetings and team collaboration