Senior Infrastructure Security Engineer

About Us Since its founding in 2017, Prometheum has leveraged its deep expertise in securities law, blockchain, and trading to create a compliant ecosystem for digital asset securities that enables all investors to seamlessly invest in digital asset securities. Prometheum has relied on its strong diverse team to build the tools to service digital asset securities. To date, Prometheum has built multiple broker-dealers traversing novel areas and a large technology stack (intersecting trading, blockchain, compliance, etc.). We continue to grow and are looking for hardworking, hungry individuals that can contribute to our already great fintech company culture as we traverse new and exciting areas that require a thirst for solving complicated problems. Role Senior Infrastructure Security Engineer - Full Time W2 Location Fully Remote - USA Salary Range $160,000 - $185,000 Responsibilities This is a senior, hands‑on role with intentionally broad scope. Cloud infrastructure, security operations, and regulatory compliance are consolidated into a single function rather than distributed across a large team — which means real ownership, direct access to leadership, and the ability to shape how security is built and operated at Prometheum. Prometheum is actively maturing its security function, and this role will be instrumental in shaping where it goes — you'll be building on an existing foundation and defining what comes next. The right candidate has worked in a lean, regulated environment before and is energized by breadth rather than frustrated by it. Design and maintain secure AWS cloud infrastructure using Terraform and Terragrunt, with a focus on IAM least‑privilege, account isolation, and security guardrails across multiple AWS environments Manage AWS network security: VPC segmentation and design, Transit Gateway architecture, PrivateLink for service isolation, Network Firewall, and Route 53 Resolver for DNS security Manage and maintain Cloudflare infrastructure including DNS, WAF, and edge compute Architect and operate Cloudflare Zero Trust — including Access policies, Tunnel configuration for private network routing, Gateway egress filtering and DNS security policies, and WARP client deployment Manage and tune AWS‑native security tooling: GuardDuty, Security Hub, Config, Inspector, CloudTrail, and WAF Integrate security controls into CI/CD pipelines (GitHub Actions) — including SAST, DAST, container image scanning, dependency vulnerability checks, and secrets detection Enhance container and workload security through image signing, admission controllers (Kyverno), runtime policies, and base image hygiene Manage dependency and patch lifecycle across Docker images, Helm charts, Terraform modules, and application packages Own and operate security monitoring and incident response: maintain SIEM/log aggregation pipelines, tune alerting for anomalous behavior and policy violations, lead root cause analysis, and document post‑mortems Conduct and coordinate vulnerability assessments; track findings through to remediation Automate compliance checks and drift detection using infrastructure scanning and policy‑as‑code tooling Participate in on‑call rotation to respond to security and infrastructure incidents Support SEC and FINRA compliance obligations by implementing and documenting technical controls, and partner with legal and compliance teams during audits and regulatory reviews Document infrastructure patterns, access controls, and security architecture for audit readiness Qualifications 7+ years of experience in information technology or cloud infrastructure 5+ years of experience in infrastructure, security engineering, or DevOps — with meaningful hands‑on overlap across all three Strong AWS expertise across security‑relevant services: IAM, VPC, GuardDuty, Security Hub, Config, CloudTrail, Secrets Manager, KMS, Network Firewall, and PrivateLink Production experience with Cloudflare Zero Trust — Access, Tunnel, Gateway, and WARP; familiarity with Cloudflare Workers or edge compute is a plus Solid AWS networking knowledge: VPC design and segmentation, Transit Gateway, PrivateLink, Route 53 Resolver, and Network Firewall in a multi‑account environment Strong Infrastructure‑as‑Code skills using Terraform and Terragrunt Hands‑on experience securing CI/CD pipelines: SAST, container scanning, secrets detection, and policy gates in GitHub Actions or similar Experience operating a security observability stack; Datadog is our current platform and familiarity with it is a plus Experience operating in a regulated financial services environment and the compliance obligations that come with it Experience with vulnerability management lifecycle: scanning, prioritization, tracking, and remediation Proficiency in at least one scripting or programming language: Python, Go, Bash, or TypeScript Strong written communication skills — able to produce documentation that satisfies both engineering and audit audiences Nice to Have Kubernetes/EKS experience at any depth — even working familiarity is valued Experience with blockchain infrastructure or digital asset platforms Any of the following certifications are valued but not required: AWS Certified Security – Specialty, Certified Information Systems Security Professional (CISSP), Certified Information Security Manager (CISM), or Certified Kubernetes Security Specialist (CKS) Experience with AI‑assisted tooling in DevOps or security workflows Background contributing to or managing vendor security reviews and third‑party risk assessments Experience working in a highly regulated financial services environment — broker‑dealer, RIA, ATS, or custodian — with direct exposure to SEC or FINRA examinations Familiarity with Regulation S‑P breach notification workflows, FINRA Rule 4530 incident reporting, or AML/BSA technical control implementation Benefits Competitive salary based on experience Excellent benefits including: Health, Vision & Dental Insurance Fully remote position with equipment provided Prometheum is an equal opportunity employer. Prometheum will only contact candidates from an official @prometheum.com email. #J-18808-Ljbffr Prometheum