Senior Backend Engineer - Scalable SaaS & AI Security

Proofpoint is seeking a highly motivated Sr. Software Engineer to join the Threat Response product engineering team. You will design distributed systems, tackle scalability challenges, and build high-performance backend services operating at scale.

Key requirements include extensive enterprise/SaaS development, strong Java/Python skills, and experience with multi-tenant architectures, PostgreSQL, and modern cloud tools. This role emphasizes AI-assisted tooling and collaboration across teams.