Perform security, pricing, scaling and reliability audit of my app

I have following DevOps stack:

- Github/bitbucket
- Azure cloud storage
- MongoDB Atlas
- JIRA
- Selenium, cypress test automation
- Heroku/digital ocean
- GoDaddy
- Google Analytics/search console
- SendGrid
- sentry.io
- hotjar

What I need:
- audit existing stack for sanity, performance, pricing, scaling and security
- Suggest and implement of on-demand scalable, and performant applications.
- Defining and setting development, test, release, update, and support processes for DevOps operation
- Incidence management and root cause analysis
- Selecting and deploying appropriate CI/CD tools for various test automation frameworks
- Monitoring the processes during the entire lifecycle Encouraging and building automated processes wherever possible
- Identifying and deploying cybersecurity measures by continuously performing vulnerability assessment and risk management
- Achieve repeatability, fast recovery, best practices, and delegate proper ownership permissions to teams
- Analyzes the technology currently being used and develops plans and processes for improvement and expansion for better cost and efficiency
- Collaborate with and assist QA in performing load tests and assessing performance optimization
- writing and maintaining the DevOps processes in tools such as confluence