Rayyan S. Email & Phone Number

• Created a Component Design for services that includes class diagrams, object-level detail, and integration contracts to describe the component's constituents.• Implemented an Authorizer service using Python 3.9 to validate REST API calls using AWS Cognito tokens. Set up Cognito user pools for the Authorizer to generate ID and access tokens.• Developed a Pre-token generator lambda function using Python that triggers in the authentication flow to customize the ID token by adding the account ID and profile ID from the Account domain service.• Developed scripts to integrate AWS API Gateway with custom headers using an authorizer and to map HTTP status codes from a lambda function to the API Gateway. These scripts allowed for seamless communication between the two systems, enabling the API Gateway to fully utilize the functionality provided by the lambda function.• Designed and implemented a dashboard using Splunk to monitor service logs and provide statistical and graphical analysis of API traffic. Created visual representations of logs to facilitate data analysis and troubleshooting.• Built Notification Platform that sends thousands of Batch and Transactional notifications daily.• Created an AWS CloudWatch event bridge scheduler and implemented an AWS lambda function that gets triggered every morning. • Built Lambda function written in java would aggregate data from EDB database (SQL) and validate data against Cassandra database (NoSql). • Developed processor service that creates JSON files and stores them in an S3 bucket. This also uses AWS pinpoint to send marketing notifications. • Tested microservices using Junit and Mockito with a minimum of 80% code coverage. • Developed QA test scenarios in qTest against EDB(SQL DB) for data retention.

Madison, Wisconsin Area

- Developed CaseManager application using microservices API for independent and Autonomous management by Using Decomposition pattern.- Developed CaseSearch and CaseManager microservices of this application using Spring Cloud API. • Implemented Microservice API using SpringBoot and Spring Cloud.• Implemented Hystrix API for fallback mechanism to handle the failure or data exceptions.• Used Hibernate queries with pagination, filtering, join and Spring Data JPA for implementing DAO implementation Layer.• Implemented distributing tracking system using Sleuth-Zipkin API.

Santa Clara, California

- Worked closely with teammates develop modular functions that can be merged together and create Point of Sale application, which was used by Walmart.- Assured quality of the product that can handle millions of transactions every week by examiningthe accuracy of GPS, range of Wi-Fi, payment system and Bluetooth connections.- Tested the functionality of payment gateway system for integration, performance and securityof POS device.

- Trained more than 30 student employees on professionalism skills- Advised and refined mentees on their presentations for student support services provided by American River College.- Served on a hiring committee to select potential student ambassadors; trained in best practices for equitable hiring.

Sacramento, California Area

- Connected students with ARC school resources such as scholarships, tutors, programs and clubs.- Assisted students with course selection according to their major.- Promoted events by distributing flyers and making phone calls.

Computer Science

Activities and Societies: President of International Life

Bachelor'S Degree, Computer Science

Activities and Societies: Treasurer of International Friends Association