As a senior back end developer I have been working for 7+ years and I have extensive experience in back end web service development. Back end programming language: Python, Node, PHP, Go, C#, Asp .net Cloud web services: AWS, GCP, Azure Database: Dynamodb, MySQL, MSSQL, SQLite, PostgreSQL, MongoDB, RDS REST/CRUD API Serverless framework IoT integration with Greengrass, Lora and so on