Visa is hiring a Staff Systems Engineer to design, configure, and maintain mission-critical middleware and reverse proxy platforms, specifically focusing on NGINX and Apache HTTP Server in multi-tenant Linux environments. The role involves supporting REST-HTTP integrations, messaging technologies, and secure communication patterns (mTLS), while partnering with SRE teams for production deployments. The position also requires applying GenAI-enabled engineering practices, such as MCPs and AI-assisted troubleshooting, to improve productivity and reliability.