Sr. Infrastructure Security Engineer

    United States
    Full-Time
    Senior (7+ yrs)
    IT & Security
    Posted on January 23, 2026

    Your role in our mission

    We're looking for a Senior Infrastructure Security Engineer with a strong focus on cloud security, particularly within Google Cloud Platform (GCP). The ideal candidate should have in-depth expertise in endpoint and data security in cloud environments, using GCP tools and technologies. As a vital member of our security team, you'll work across functions to proactively prevent, detect, and respond to threats against our cloud-based infrastructure. Join our expanding team of skilled security professionals dedicated to innovating and securing Prosper's cloud platforms, utilizing state of the art security tools for the benefit of our customers and employees.
    How you'll make an impact
  1. Own cloud security across Google Cloud Platform (GCP) and Microsoft Azure, driving initiatives from design through execution
  2. Reduce real risk by operationalizing CNAPP tooling like Wiz - cutting noise, prioritizing high-impact issues, and ensuring remediation lands
  3. Embed security into infrastructure using Terraform and CI/CD, making controls scalable, consistent, and developer-friendly
  4. Lead vulnerability management end-to-end, from triage to remediation tracking, partnering with engineering to ship fixes quickly
  5. Strengthen data and endpoint security (DLP, EDR, identity, device posture) and reduce exposure across cloud environments
  6. Improve detection and response by building and tuning detections in Google Chronicle and supporting incident response
  7. Proactively identify and fix cloud misconfigurations (IAM, networking, firewalls, encryption) before they become incidents
  8. Define practical security standards and runbooks that engineers can easily adopt
  9. Act as a senior escalation point during security incidents, driving effective triage and resolution
  10. Leverage AI tools responsibly to accelerate code review, triage, and security analysis while maintaining strong security guardrails
  11. Mentor engineers and raise the overall security bar through collaboration and clear risk communication
  12. Skills that will help you thrive
  13. Bachelor’s degree in Computer Science, Information Security, or related field, with 8+ years of relevant experience OR Master’s degree with 6+ years experience
  14. Strong hands-on experience securing cloud environments in GCP and/or Azure
  15. Deep understanding of cloud fundamentals: IAM, networking, logging, monitoring, and encryption
  16. Proven ability to identify real risk vs. noise using CNAPP tools like Wiz
  17. Experience with Terraform and security-as-code, including CI/CD integrations
  18. Solid vulnerability management experience, including prioritization and driving remediation with engineering teams
  19. Knowledge of data security (DLP, sensitive data discovery) and endpoint/identity platforms (Okta, MDM, Google Workspace)
  20. Experience with SIEM tools like Chronicle, including detection engineering and incident support
  21. Strong scripting/automation skills (e.g., Python) to reduce manual security work
  22. Comfortable owning projects end-to-end in a highly collaborative environment
  23. Strong familiarity with AI agents and tools, aligned with Prosper Tech's "forward-thinking but safe" approach to AI adoption
  24. Understanding of common cloud attack paths and how security failures occur in real environments
  25. Strong collaboration and communication skills, with the ability to explain risk clearly and drive practical, scalable fixes across cross-functional teams
  26. Resources to help you prosper
  27. A connected experience: We prioritize high-touch collaboration and flexibility. Whether you are working from our San Francisco or Phoenix offices or joining us as a fully remote team member, we provide the digital-first tools and intentional culture to keep you synced and supported
  28. Invested in your future: A competitive salary and a 401(k) with a 5% company match to help you build long-term financial security
  29. Holistic well-being: We provide the resources you need to thrive, from flexible time off and paid parental leave to an annual wellness allowance and comprehensive health coverage
  30. Professional & personal growth: Take advantage of a suite of premium perks, including Udemy access, childcare assistance, pet insurance, and a bevy of additional savings through Beneplace
  31. Interview Process
  32. Recruiter Call: A brief screening to discuss your experience and initial questions
  33. Department Interview: Deeper dive into technical skills and project alignment with the Hiring Manager or team member
  34. Team/Virtual Interview: Meet team members for collaborative discussions, problem-solving, or technical exercises
  35. Final Round: Discussion with a department head/executive
  36. Peer-to-peer lending platform for personal loans.
    201-500 employees
    Finance & Fintech
    HQ: United States