Oracle 19c Creation & Tuning

I run several production workloads on Oracle 19c and need an expert DBA who can handle three core activities for me around the clock: building new databases from scratch, tuning performance on existing instances, and carrying out version or patch upgrades without downtime to the business... (Budget: ₹12500 - ₹37500 INR, Jobs: Database Administration, Documentation, Oracle, Performance Tuning, SAP, SQL)