Infrastructure Security Engineer

About Upstart

At Upstart, we’re united by a mission that matters: to radically reduce the cost and complexity of borrowing for all Americans. Every day, we bring creativity, experimentation, and advanced AI to reshape access to credit, helping millions move forward financially with clarity and confidence.

As the leading AI lending marketplace, we partner with banks and credit unions to expand access to affordable credit through technology that’s both radically intelligent and deeply human. Our platform runs over one million predictions per borrower using more than 1,800 signals, powering smarter, fairer decisions for millions of customers.

We’re proudly digital-first, giving most Upstarters flexibility to work from wherever they thrive, alongside teammates across 80+ cities in the US and Canada. Digital-first doesn’t mean distant. We’re intentional about in-person connection through team onsites, planning sessions, and moments that spark creativity and trust.

If you’re energized by tackling meaningful problems, excited to innovate with purpose, and motivated by work that truly matters, we’d love to hear from you.

Upstart’s Infrastructure Security team is focused on securing the cloud, compute, platform, and deployment layers that run our products. We believe security should enable fast, safe delivery through strong engineering fundamentals, automation, and secure‑by‑default patterns. Our team partners closely with platform, infrastructure, and product engineering to reduce risk in areas such as cloud IAM, Kubernetes and container security, network controls, secrets management, infrastructure‑as‑code, and production vulnerability management.

As a Security Engineer II at Upstart, you will help design, build, and improve security controls that protect our production infrastructure and developer platforms. You will partner with engineers across infrastructure, platform, and product teams to identify risks, review designs, automate preventative controls, and improve the security of the systems our products run on. This role is well suited for an engineer who can independently lead medium‑sized projects, troubleshoot moderately complex security problems, and deliver durable improvements that make Upstart’s infrastructure more secure by default.

• Design and implement security controls for cloud, platform, and deployment systems, with a focus on secure defaults and durable risk reduction.
• Partner with platform, SRE, and infrastructure teams to review architecture and infrastructure changes, identify security risks, and drive practical remediation plans.
• Build and improve automation for infrastructure security, including controls for cloud IAM, Kubernetes and container environments, secrets handling, and infrastructure‑as‑code workflows.
• Identify and remediate systemic weaknesses such as misconfigurations, exposed services, weak trust boundaries, and insecure defaults in production environments.
• Support infrastructure vulnerability management by helping prioritize findings, validate fixes, and improve how issues are detected and prevented over time.
• Help assess and improve security controls for AI‑assisted developer workflows and GenAI‑enabled systems, including agentic tooling, coding assistants, and internal AI integrations that interact with production or sensitive environments.
• Respond to production security issues, investigate root causes using logs, dashboards, and system context, and contribute follow‑up improvements that strengthen the platform.
• Contribute to team effectiveness by documenting patterns, participating in design and code reviews, and helping raise the security quality bar across engineering.

• Bachelor’s degree and 3+ years of experience in security engineering, infrastructure engineering, or a related software engineering role.
• Experience securing or operating cloud‑native infrastructure in AWS or a similar cloud environment.
• Experience with one or more of the following domains: cloud IAM, Kubernetes/container security, network security, secrets management, or infrastructure vulnerability management.
• Experience writing…