The Senior Site Reliability Engineer will ensure the high availability and performance of systems and applications related to financial transactions processing in over 200 countries. Responsibilities include maintaining and resolving incidents for various applications, proactively analyzing potential issues, collaborating with engineering teams to implement solutions, automating tasks, participating in troubleshooting, and creating comprehensive documentation. The role also involves working with observability tools and participating in an on-call rotation. The engineer will contribute to improving reliability, scalability, and efficiency and will engage with innovative solutions to ensure a reliable and secure environment for financial transactions.