We have extensive experience in the development and deployment of production software systems on cloud services. We have worked with such AWS services as Lambda, Cognito, DynamoDB, RDS, Aurora, CloudWatch, SNS, SSM, SES. One of the latest projects is a heavily loaded application that has been deployed by multiple AWS EC2 instances using AWS EB. PostgreSql (AWS RDS) is used as the main database, and the Spring Boot is used as the backend framework. To process a large number of notifications from servers with the main logic, the notification service is implemented on Micronaut, which is deployed on AWS Lambda, and used DynamoDb as storage, which allows to process many requests for writing and retrieving data in an environment where there is no need for ACID transactions.