Senior Proxy 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 Corporate Overview Proofpoint is a leading cybersecurity company protecting organizations' greatest assets and biggest risks: vulnerabilities in people. With an integrated suite of cloud-based solutions, Proofpoint helps companies around the world stop targeted threats, safeguard their data, and make their users more resilient against cyber-attacks. Leading organizations of all sizes, including more than half of the Fortune 1000, rely on Proofpoint for people-centric security and compliance solutions mitigating their most critical risks across email, the cloud, social media, and the web. We are singularly devoted to helping our customers protect their greatest assets and biggest security risk: their people. That's why we're a leader in next-generation cybersecurity. Protection Starts with People. Proofpoint. Job Title: Senior Proxy Engineer Locations Hyderabad, A.P., India Athens, Greece Sunnyvale, CA, USA Role We are seeking a Senior Proxy Engineer to design, build, and operate production-grade proxy infrastructure at scale. This role demands expert command of HTTP and related application-layer protocols, deep experience architecting proxy systems, and primary development fluency in Go with strong Lua scripting skills for runtime extensibility. You will own the full lifecycle of our proxy platform - from protocol-level design and connection management through TLS termination, request routing, traffic shaping, and upstream load balancing - serving as the technical authority on how traffic flows through our infrastructure. You will work across forward proxies, reverse proxies, API gateways, and protocol translators, handling a diverse set of methodologies including explicit HTTP proxying, transparent interception, SOCKS tunnelling, and CONNECT-based HTTPS proxying. Familiarity with OpenTelemetry for deep proxy observability is a meaningful plus.