About this role.
Phantom is hiring a senior-level platform security engineer to secure mission-critical AWS and Amazon EKS environments for a large self-custodial financial platform. The role owns cloud identity, Kubernetes hardening, infrastructure and policy as code, CI/CD and software supply-chain security, and automated remediation. It requires deep hands-on production experience with AWS, Kubernetes, IAM, least-privilege architecture, and security automation, plus the ability to write production code. The engineer will partner closely with infrastructure, SRE, developer experience, and product engineering teams while independently driving risks through verified remediation. The fully remote role is restricted to candidates based in the United States or Canada.
Role DNA
A quick view of the complexity, pace, ownership and collaboration implied by the job description.
Job Complexity
5/5Pace & Pressure
5/5Autonomy Level
5/5Communication Load
5/5Salary analysis
Estimated compensation compared with the broader US market for similar roles.
Core skills
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Sample interview questions
I would start by mapping identities, privileged actions, trust relationships, and production access paths. I would use federated, short-lived credentials; role-based access with narrowly scoped policies; workload identity for services; and approval-based, time-bound elevation for exceptional human access. I would also centralize audit logging, continuously analyze unused permissions, and validate controls through access reviews and automated policy tests.
I prioritize control-plane access, Kubernetes RBAC, workload identity, network segmentation, admission controls, secret handling, image provenance, and runtime visibility. I would establish secure defaults through policy as code, restrict privileged workloads and risky capabilities, isolate namespaces and tenants, and ensure cluster changes are auditable. I would then test the controls against realistic misuse and lateral-movement scenarios.
I would replace long-lived cloud credentials with GitHub OIDC federation and tightly scope role trust policies to approved repositories, branches, environments, and workflows. I would protect runners, pin and review third-party actions, manage dependencies and artifacts with integrity checks, and require signed or attestable build outputs before deployment. Production deployments should use protected environments, minimal permissions, strong logging, and separation between build and release responsibilities.
I first validate the finding, identify affected assets and identities, and assess exploitability, blast radius, and business impact. I coordinate with the owning team on containment measures that preserve availability, then implement a durable remediation and a detection or guardrail to prevent recurrence. I close the work only after verifying the fix in production and documenting ownership, residual risk, and follow-up actions.
Cloud IAM and infrastructure configuration are strong candidates because changes occur continuously and failures can create broad exposure. I would encode approved patterns and prohibited configurations in infrastructure modules and policy checks, run them in pull requests and continuously against deployed environments, and automate safe remediation where possible. This improves coverage and response time while allowing security engineers to focus on complex architecture and incident work.
Phantom is on a mission to connect the world to the freedom of open markets. Tens of millions of people all over the world use Phantom to access global markets that never close, including perpetuals, prediction markets, tokenized assets, stablecoins and memes. Phantom users are able to discover the markets that matter and the cultural moments that shape them, building conviction through real-time data and the verified performance of top traders. With self-custody and access to open networks at its core, Phantom lets them control their financial moves in the same app they use to safely store or spend money worldwide.
Phantom has reached #1 in Google Play’s finance category and consistently ranks in the top 50 apps across all categories. Phantom partners with many of the most trusted and influential names in finance like Hyperliquid, Stripe, Kalshi and Visa, to make the most popular and innovative financial products accessible to everyone.
We are around 180 people, fully remote, backed by a $150M Series C investment from a16z, Sequoia Capital and Paradigm.
Platform security is foundational to protecting Phantom and the systems our users rely on. We’re hiring a Senior Platform Security Engineer to own and improve security across our AWS and Kubernetes environments. You’ll work directly with infrastructure and engineering teams to secure the control planes, identities, workloads, and deployment systems behind our most critical products.
We’re building an AI-native security team that aggressively uses AI to expand the speed, depth, and reach of our work. We’re looking for a strong security engineer with high agency who can identify the risks that matter, build practical controls, and own problems through verified remediation. This is a hands-on role for someone who is comfortable working in production systems, writing code and infrastructure, responding to incidents, and making security improvements without slowing down the teams building on the platform.
This role is fully remote; however, we’re only open to candidates based in the US and Canada.
Responsibilities
AWS Security: Own and improve security across Phantom’s multi-account AWS environment, including IAM, Identity Center, networking, compute, storage, secrets, logging, and organization-level guardrails.
Kubernetes Security: Secure production Kubernetes environments running on Amazon EKS, including cluster configuration, workload identity, RBAC, admission controls, network boundaries, secrets, container security, and tenant isolation.
Identity and Access: Design least-privilege access models for engineers, services, and automation. Build scoped, auditable, and time-bound access paths for sensitive production systems.
Mission-Critical Systems: Protect the infrastructure supporting products and services that handle sensitive data and high-value operations.
Cloud Security Architecture: Lead security design for new infrastructure, platform services, and major architectural changes.
Infrastructure and Policy as Code: Build reusable security controls using tools such as Pulumi, Terraform, Kubernetes policy engines, and automated configuration validation.
CI/CD and Supply Chain Security: Harden build, deployment, and release systems, including GitHub Actions, workload federation, build runners, dependencies, artifacts, signing, provenance, and access to production environments.
Security Automation: Build tools that identify and remediate cloud and Kubernetes risks at scale. Apply AI-assisted workflows where they materially improve analysis, coverage, or response speed.
Cross-Functional Leadership: Partner closely with Infrastructure, SRE, Developer Experience, and product engineering teams. Establish practical platform-security standards and help teams adopt them.
Qualifications
7+ years of experience in platform security, cloud security, infrastructure security, security engineering, or a closely related engineering role.
Deep, hands-on experience securing production AWS environments. You understand IAM and resource policies, workload identity, network security, secrets management, logging, organization-level controls, and the ways these systems fail in practice.
Deep experience securing Kubernetes in production, preferably Amazon EKS, including RBAC, workload identity, admission policy, network policy, pod security, secrets, and cluster hardening.
Experience designing or securing mission-critical systems where compromise, excessive privilege, or loss of availability could have significant customer or business impact.
Strong understanding of identity, authorization, least privilege, isolation, and blast-radius reduction across both human and machine access.
Experience securing CI/CD and software supply chains, including GitHub Actions or similar systems, build runners, workload federation, artifacts, and production deployment paths.
Experience writing and reviewing infrastructure as code using Pulumi, Terraform, CloudFormation, or similar tools.
Ability to write production-quality code or automation in a language such as TypeScript, Python, Go, or Rust.
High agency and ownership. You can take an ambiguous platform-security problem from initial investigation through implementation and verified remediation.
Clear communication and a strong track record of partnering with infrastructure and engineering teams while maintaining a high security bar.
Nice To Haves
Experience with AWS Nitro Enclaves or other trusted execution environments, including attestation, isolation boundaries, secure key handling, and operational lifecycle management.
Experience securing financial, payments, wallet, custody, or other high-value transaction systems.
Familiarity with key-management infrastructure, AWS KMS, CloudHSM, cryptographic signing systems, or secrets-management platforms.
Experience operating or securing multi-region Kubernetes and AWS environments at significant scale.
Familiarity with service meshes and cloud-native networking technologies such as Istio, PrivateLink, Transit Gateway, or eBPF-based controls.
Experience with GitHub OIDC, Argo CD, Helm, Crossplane, or Kubernetes-based infrastructure delivery.
Experience using cloud-security and observability platforms such as Wiz, Datadog, GuardDuty, Security Hub, or CloudTrail.
Experience building policy-as-code, automated remediation, or security tooling used by a large engineering organization.
Familiarity with blockchain infrastructure or self-custodial wallet architecture.
Why Work with Us
Phantom is built by a team of experienced product and engineering leaders working to make crypto-powered finance safer and easier to use. Our platform supports products used by tens of millions of people, making infrastructure security both technically challenging and directly consequential.
This role offers the opportunity to:
Secure AWS and Kubernetes systems supporting products used by millions of people.
Work on high-impact problems spanning cloud identity, production access, workload isolation, software supply chains, and mission-critical infrastructure.
Build controls directly in the platform rather than operating as an advisory or review-only security function.
Influence architecture early and own improvements through implementation and production verification.
Help shape an AI-native security team with a strong engineering and automation culture.
Benefits
Competitive salary and equity
Eligibility to participate in the company’s performance bonus program
Comprehensive medical, dental, and vision insurance with 100% coverage
Stipend for your ideal remote setup
Flexible hours and a supportive remote environment
Unlimited vacation—take time when you need it
401(k) retirement plan
Monthly wellness benefit
Weekly meal benefit
Global off-sites
The target base salary for this role will range between $200,000 to $250,000 with the addition of equity and benefits. This is determined by a few factors including your skillset, prior relevant experience, quality of interviews and market factors (such as location) at the point in time of offer.
We strongly encourage candidates of all backgrounds to apply. We believe that our work is stronger with a variety of perspectives, and we’re eager to further diversify our company. If you have a background that you feel would make an impact at Phantom, please consider applying. We’re committed to building an inclusive, supportive place for you to do the best work of your career.
By submitting your resume and application materials, you acknowledge and agree that Phantom Technologies, Inc. (“Phantom”) collects and processes your personal information (including application materials, interview records, and related data) to evaluate your candidacy. Phantom may use AI-powered tools and third-party service providers for transcription, note-taking, scheduling, and other administrative tasks. Phantom does not sell your information and your materials will be handled securely and in accordance with applicable data protection laws.
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