- Kubernetes operation: 3 people

- API on top of Kubernetes: 2 people

- Tools around the API on top of Kubernetes: 1 person

- API and tools specific for continuous integration: 2 people

- Database operation: 2 people

- Event/Data pipeline: 5 people

- Authentication: 3 people

- Mobile API: 2 people

- Mobile App: 2 people

- Web API: 4 people

- Web App: 4 people

- ETL/Data science: 5 people

- Document writers, testers, new tech on-boarding evangelists: 5 people

That's 40 people for one feature. And you have 12 features, you need 500 people.