Sustaining Engineer

About the role

Proofpoint is a global leader in human- and agent-centric cybersecurity. We protect how people, data, and AI agents connect across email, cloud, and collaboration tools. Over 80 of the Fortune 100, 10,000 large enterprises, and millions of smaller organizations trust Proofpoint to stop threats, prevent data loss, and build resilience across their people and AI workflows. Our mission is simple: safeguard the digital world and empower people to work securely and confidently. Join us in our pursuit to defend data and protect people. How We Work: At Proofpoint you'll be part of a global team that breaks barriers to redefine cybersecurity guided by our BRAVE core values: Bold in how we dream and innovate Responsive to feedback, challenges and opportunities Accountable for results and best in class outcomes Visionary in future focused problem-solving Exceptional in execution and impact Sustaining Engineer - Archive Platform Company Overview At Proofpoint, we protect people, data, and brands from advanced threats and compliance risks. We build and operate a highly scalable cloud security platform trusted by more than half of the Fortune 100. Our teams combine deep technical expertise with operational excellence to deliver resilient, high-scale systems that customers rely on every day. We are seeking a highly technical Sustaining Engineer to support and strengthen our Archive platform. This role sits at the intersection of engineering and production operations and is responsible for deep technical investigations, root cause analysis, and long-term stability improvements. Our Archive solution is a large-scale distributed system spanning legacy data center components and modern AWS cloud infrastructure. The codebase is extensive and complex, and this role requires a full stack engineer who can move confidently across services, APIs, databases, messaging systems, and infrastructure layers. This is not a traditional support role. You will act as an engineering owner for production issues, working directly in the code, debugging live systems, and implementing durable fixes that improve reliability and performance. You will also participate in a 24x7 on-call rotation and play a key role in maintaining production health for mission critical services.