- Migrated a monolithic legacy code base into microservices architecture, facing many challenges of coupling legacy .net framework with aforementioned designImplemented distributed transactions having saga in mind and removed old sqlclient trx managementRestructured internal request response communications using grpc codefirst and retired wcf Moving forward asynchrony and event driven solutions using messaging through rabbitmq mostlyUsing redis for handling distributed caching and locking requirements - Designed and led development of a document system management backed with github repositories using github apis and rate limited resource usage with cache management

- Led development of payamgostar crm software in different aspects such as started defining rest apis using openapi principles,Restructuring projects architecture to 3-layered model,Improved performance of sql queries and separated read queries from sql complicated views into more efficient sql joins where needed and tuned write queries by rewriting transaction isolation levels and so on.- Designed and led development of a graphql-like Search framework optimized for crm needs and 2 json and expression supporting clients- Improved performance and consistency of bpms engine using better implementation of transactions, locks and concurrency.- Designed and developed a performance management software helping remote working, consisting of an electronjs coupling reactjs base desktop client, react-native mobile client, aspnet core signal gatherer backend with 3 microservices for calculating and working time aggregation, handling authentication and authorization with openidconnect and oauth2 principles and blob storage management.

- Designed and developed business requirements of the payamgostar website and customer club using orchard framework and 3 asp.net mvc based modules on top of orchard backed with 3 sql darabases. Communications were handled by entity framework orm. Ui development was implemented via jquery and knockout js.

- Designed and implemented a medical insurance sales and support system from scratch using asp.net mvc, sql server database, entity framework orm and jquery kendojs for interface-Designed and developed a medical tourism website with social engagement capabilities, live communication between doctors and patients using websockets, hoteling connected services for comparing and searching