Sr. Infrastructure Security Engineer

Senior Infrastructure Security Engineer

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

• Own cloud security across Google Cloud Platform (GCP) and Microsoft Azure, driving initiatives from design through execution
• Reduce real risk by operationalizing CNAPP tooling like Wiz - cutting noise, prioritizing high-impact issues, and ensuring remediation lands
• Embed security into infrastructure using Terraform and CI/CD, making controls scalable, consistent, and developer-friendly
• Lead vulnerability management end-to-end, from triage to remediation tracking, partnering with engineering to ship fixes quickly
• Strengthen data and endpoint security (DLP, EDR, identity, device posture) and reduce exposure across cloud environments
• Improve detection and response by building and tuning detections in Google Chronicle and supporting incident response
• Proactively identify and fix cloud misconfigurations (IAM, networking, firewalls, encryption) before they become incidents
• Define practical security standards and runbooks that engineers can easily adopt
• Act as a senior escalation point during security incidents, driving effective triage and resolution
• Leverage AI tools responsibly to accelerate code review, triage, and security analysis while maintaining strong security guardrails
• Mentor engineers and raise the overall security bar through collaboration and clear risk communication

Skills that will help you thrive

• Strong hands-on experience securing cloud environments in GCP and/or Azure
• Deep understanding of cloud fundamentals: IAM, networking, logging, monitoring, and encryption
• Proven ability to identify real risk vs. noise using CNAPP tools like Wiz
• Experience with Terraform and security-as-code, including CI/CD integrations
• Solid vulnerability management experience, including prioritization and driving remediation with engineering teams
• Knowledge of data security (DLP, sensitive data discovery) and endpoint/identity platforms (Okta, MDM, Google Workspace)
• Experience with SIEM tools like Chronicle, including detection engineering and incident support
• Strong scripting/automation skills (e.g., Python) to reduce manual security work
• Comfortable owning projects end-to-end in a highly collaborative environment
• Strong familiarity with AI agents and tools, aligned with Prosper Tech's "forward-thinking but safe" approach to AI adoption
• Understanding of common cloud attack paths and how security failures occur in real environments
• Strong collaboration and communication skills, with the ability to explain risk clearly and drive practical, scalable fixes across cross-functional teams

Resources to help you prosper

• 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
• Invested in your future: A competitive salary and a 401(k) with a 5% company match to help you build long-term financial security
• 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
• 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

Interview Process

• Recruiter Call: A brief screening to discuss your experience and initial questions.
• Department Interview: Deeper dive into technical skills and project alignment with the Hiring Manager or team member.
• Team/Virtual Interview: Meet team members for collaborative discussions, problem-solving, or technical exercises.
• Final Round: Discussion with a department head/executive.

$138,000 - $190,000 a year Compensation details: The salary for this position is $138k - $190k annually, plus bonus and generous benefits. In determining your salary, we will consider your location, experience, and other job-related factors.

About Our Technology Team

We are growing our Technology team to support our various financial products. The ideal candidate is passionate about learning the Fintech domain and delivering cutting-edge, high-quality solutions to solve business problems. We utilize a progressive, test-driven, Agile development methodology that places a high premium on communication, teamwork, sound design and clean implementation.

About Us

Prosper introduced U.S. consumers to an innovative approach to personal finance as the first peer-to-peer lending platform in the country. Since 2005, Prosper has helped over 2 million customers achieve financial well-being through a comprehensive suite of digital personal finance products.

Prosper's flagship personal loan* marketplace continues to offer unique value for both borrowers and investors, while the Prosper® Card¹ provides essential access to credit and flexibility for those managing their financial journey. Guided by its mission to advance financial well-being, Prosper is dedicated to helping people thrive by meeting people where they are with simple, trusted, and affordable financial solutions. Learn more at

We're on a mission to hire the very best, and we are committed to creating exceptional employee experiences where everyone is respected and has access to equal opportunity. We realize that new ideas can come from everywhere. It is important to us that every hire connects with our vision, mission, and core values. Join a leading fintech company that's democratizing finance for all!

Our Values

• Diversity expands opportunities
• Collaboration creates better solutions
• Curiosity fuels our innovation
• Integrity defines all our relationships
• Excellence leads to longevity
• Simplicity guides our user experience
• Accountability at all levels drives results