sure let me take a minute to think about it so maybe I will use a micro services based architecture okay I will first tell you the number of the type of components that I will use to architect this kind of system I will use a API gateway because it is a micro services based architecture so I will use a API gateway to do the authentication part or the routing part at that certain level or if there is API versioning to do the API versioning also so I will do the API gateway part that is one component and the component I will use load balances to manage the traffic that is coming for that API because it is a very heavy transactional system and to do health checks like okay this is it is how it is working so do the health checks the REST APIs that I will create will be stateless server would not maintain any data every time the client is making the request they need to send everything that is required for that request to be completed to be executed so client has to send all that data I will use a messaging queue maybe rabbit in MQ or again Kafka because it is very difficult because it is a heavy transactional system so it will be very difficult to they can be concurrent request also so I will send those requests in the messaging queue and one by one once one request is served another request will come up so I will use messaging queue using a synchronous processing they will be a caching layer because if they are fetching some information quite frequently and it always gives the same information for a certain client then I will cache that data so that number of overhead or number of requests overhead that is going to the API is lesser for the database part for database part I can use sharding because if it is a heavy transactional database storing all the data in a single database it will give performance impact also while fetching data from the database so I will use a sharding for that for monitoring those APIs there are certain monitoring tools like application insights that I can use they will be CI CD pipelines automated CI CD pipelines other than that for a high throughput or a real-time processing I can use a synchronous programming along with messages queues I can use horizontal scaling of stateless REST APIs architecture and I can implement batching for external system integration so yeah this is how I will architect that system