Principal Site Reliability Engineer

About the role

DigiCert is a global leader in intelligent trust. We protect the digital world by ensuring the security, privacy, and authenticity of every interaction. Our AI-powered DigiCert ONE platform unifies PKI, DNS, and certificate lifecycle management, to secure infrastructure, software, devices, messages, AI content and agents. Learn why more than 100,000 organizations, including 90% of the Fortune 500, choose DigiCert to stop today's threats and prepare for a quantum-safe future at www.digicert.com Job summary The Platform Ops team within CloudOps is responsible for the reliability, scalability, and modernization of DigiCert's cloud infrastructure. As a Principle SRE, you will own the intersection of software engineering and operations-driving automation-first practices, reducing toil, and accelerating our cloud transformation across AWS, Azure, and GCP environments. You will be a technical force multiplier: raising reliability standards across the organization, defining SLOs that matter, and building the internal platforms and tooling that enable product teams to ship with confidence.

Responsibilities

• Reliability Engineering
• Define, implement, and own SLIs, SLOs, and error budgets for critical platform services
• Lead blameless post-mortems and drive systemic reliability improvements across the platform
• Design and implement observability pipelines (metrics, logs, traces) using tools such as Splunk, Prometheus, Grafana, or OpenTelemetry
• Participate in on-call rotation and serve as an incident commander for P0/P1 events
• Cloud Modernization
• Architect and execute migration strategies from legacy infrastructure to cloud-native patterns (containers, serverless, managed services)
• Champion adoption of Kubernetes, service mesh, and managed cloud services (EKS, GKE, AKS)
• Evaluate and introduce emerging cloud technologies that improve availability, cost efficiency, and developer experience
• Partner with architecture and security teams to embed reliability and compliance into platform design
• Automation & Platform Development
• Build and maintain infrastructure-as-code using Terraform across multi-cloud environments
• Develop internal tooling, self-service platforms, and golden-path templates that reduce operational burden for development teams
• Automate operational workflows including provisioning, scaling, patching, and secret rotation
• Contribute to and maintain CI/CD pipelines (GitHub Actions) to enable safe, frequent deployments
• Engineering Leadership
• Mentor mid-level engineers on SRE principles, distributed systems, and infrastructure best practices
• Collaborate cross-functionally with product, security, and compliance teams to deliver on platform roadmap commitments
• Document architectural decisions, runbooks, and platform standards; raise the engineering bar through code and design reviews
• What you will have
• 5+ years of experience in SRE, platform engineering, or infrastructure engineering roles
• Deep proficiency in at least one major cloud provider (AWS, GCP, or Azure) with working knowledge of multi-cloud environments
• Strong software engineering skills in Python, Go, or Bash; comfortable writing production-grade automation and tooling
• Hands-on Kubernetes experience: cluster operations, workload management, networking (CNI/service mesh), and security (RBAC, pod security)
• Infrastructure-as-code expertise with Terraform or equivalent; experience with GitOps workflows
• Proven experience designing and operating observability systems and responding to production incidents at scale
• Strong understanding of networking fundamentals: DNS, TLS/PKI, load balancing, and zero-trust networking concepts

Requirements

• Experience in PKI, certificate lifecycle management, or security-adjacent infrastructure
• Familiarity with compliance frameworks such as SOC 2, FedRAMP, or ISO 27001 in cloud environments
• Prior experience driving cloud migration or modernization programs at scale
• Contributions to open-source infrastructure or platform projects
• AWS/GCP/Azure professional-level certifications (e.g., AWS Solutions Architect Professional, CKA/CKS)
• What success looks like
• Working at DigiCert CloudOps
• Greenfield modernization: we are actively migrating workloads and building new platform capabilities-you'll shape the architecture, not just maintain it
• Engineering-first culture with a strong bias toward automation, GitOps, and platform thinking
• Cross-functional visibility: PlatformOps partners directly with product, security, and compliance-your work has organization-wide impact
• Competitive compensation, equ

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