Cloud Security Engineer

About OpendoorAt Opendoor our mission is to tilt the world in favor of homeowners and those who aim to become one. Homeownership matters. It's how people build wealth, stability, and community. It's how families put down roots, how neighborhoods strengthen, how the future gets built. We're building the modern system of homeownership giving people the freedom to buy and sell on their own terms. We’ve built an end-to-end online experience that has already helped thousands of people and we’re just getting started.About The Role (Hybrid 4 Days Onsite, 1 Remote)At Opendoor our goal is to build the biggest, most trusted housing platform and set a newstandard for how people move. We've combined our deep, proprietary data and operationalexpertise with the power of artificial intelligence to make online home selling and buyingradically simple.Our Security Engineering team is building intelligent systems that protect Opendoor and ourcustomers while enabling unprecedented engineering velocity. We apply software engineeringand AI to solve security problems across product, infrastructure, and operations by buildingguardrails where they matter, not gates where they don't.As our Cloud Security Engineer, you'll own the security of the infrastructure that runs Opendoor— multi-account AWS, EKS, the IAM and identity plane connecting Okta to every system, andthe cloud workloads that handle home acquisition, resale, mortgage, title, and escrow. You'llinherit a recently-completed EKS migration, an in-progress CSPM/CNAPP replacement, and azero-trust roadmap waiting for a technical owner.What You'll DoOwn the security architecture of our AWS estate — across multiple accounts, EKSclusters, Terraform-managed infrastructure, and the IAM plane that ties everythingtogether.Manage and optimize our CNAPP and CSPM cloud security tooling, ensuring platformsare effectively integrated into engineering workflows to drive the automated remediationof infrastructure risks.Modernize our secure access strategy by deploying Zero Trust principles—integratingdevice trust and identity-aware proxies—to provide seamless, least-privileged access tointernal infrastructure.Harden our EKS environment — RBAC, admission policies, workload identity, runtimeprotection, image signing, and base-image strategy on top of our Bottlerocket +Karpenter foundation.Build new agentic detection-and-response workflows using Lambda + AWS-nativeprimitives that close the loop from alert to investigation to remediation.Drive a 'Shift-Left' cloud security strategy within our pipelines using Terraform/Terrakube,GitHub Actions, ECR — so that misconfigurations get caught at PR time, not in a CSPMdashboard a week later.Partner with the Infrastructure team on cloud-native security decisions: VPC architecture,ingress, secrets management (Vault), service identity, and how Okta extends into AWS,Azure, and GCP.Run our cloud detection engineering: GuardDuty, Security Hub, CloudTrail, VPC flowlogs — tuned for signal, integrated with Datadog and our incident response playbooks.Support cloud security for our subsidiaries (OS National, Mainstay Title) including AzureWindows AD environments, with adversarial review of the systems that touch wirefraud risk.Set the bar for what "secure by default" looks like for AI-maximalist engineering —vibe-coded apps, MCP servers, and agent-driven workflows that touch production cloudinfrastructure.Mentor engineers across Security, Infra, and Product Eng on cloud security patterns, andturn the patterns you see into automated guardrails so the next team doesn't make thesame mistake.Tech StackCloud: AWS, Azure, GCPContainers / Orchestration: EKS, Bottlerocket, Karpenter, Helm, Argo CDIaC: Terraform, Terrakube (self-hosted)Identity & Access: Okta, Duo, AWS Identity Center, Okta-OIDC for EKS, Platform SSO(macOS), Hashicorp VaultCloud Security: GuardDuty, Security Hub, CloudTrail, GitHub Advanced Security;CSPM/CNAPP replacement in flight (Wiz, Datadog Cloud Security, CrowdStrike FalconCloud Security under eval)Detection / Observability: Datadog (security + observability), Cribl, CloudTrail, S3 archiveLanguages: Go, Python, TypeScript, Ruby, HCLAI Tooling: Claude, OpenAI, Claude Code, Runlayer MCP, custom agent frameworks —used heavily for alert triage, IaC review, and remediation draftingWhat You'll NeedDeep conviction that AI and automation should eliminate manual work humans shouldn'tbe doing anyway. You're excited to replace ticket toil and manual cloud config reviewwith automated systems, IaC guardrails, and agents.Business enablement security mindset — you measure success by business impact andinformed risk-taking, not by tickets opened or compliance checklists completed.5+ years of cloud or infrastructure security experience, with deep AWS expertise (Azureand GCP a plus). You can read a CloudTrail event, write a service control policy, andexplain why a particular IAM trust policy is dangerous, in the same conversation.Strong skills in at least one of Go, Python, or TypeScript, with the ability to read and writeTerraform and shell. You are a builder.Hands-on Kubernetes security experience — RBAC, network policies, admission control,workload identity, image and supply-chain security. EKS specifically is a plus.Experience deploying and operating CSPM, CNAPP, or CWPP tooling (Wiz, Prisma,Orca, Datadog, CrowdStrike Falcon Cloud, Lacework, or equivalent) — and a point ofview on what good looks like vs. what's noise.Identity-first security mindset — IAM, OIDC, SAML, federation, secrets management —and the ability to design least-privilege access at scale.Humility and genuine curiosity — you're as excited to learn from product and infraengineers and enable their work as you are to write detections or design guardrails.Bonus Points ForExperience designing or operating Zero Trust Network Access (Cloudflare Access,Tailscale, Twingate, Google BeyondCorp, etc.).Detection engineering background — writing detections that actually fire on real attackerbehavior without burying the team in noise.Experience securing AI/ML pipelines, agent frameworks, or MCP-style integrations thattouch production data.Familiarity with SOC 2, SOX, or other compliance frameworks in cloud environments —and an instinct for when compliance work creates real security value vs. when it doesn't.Open-source contributions to cloud security tooling (Cartography, Prowler, ScoutSuite,Falco, Kyverno/OPA, Checkov, etc.).CompensationWe also offer a comprehensive package of benefits including unlimited PTO,medical/dental/vision insurance, life insurance, and 401(k) to eligible employees.The Pay Range For This Role Is195,200 - 268,400 USD per year(US Zone 2)