Yosief Gebrewold
Java Full Stack Developer @UnitedHealth Group
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WORK HISTORY
Java Full Stack Developer @UnitedHealth Group
Designed and developed Microservices-based enterprise applications using Spring Boot, JPA, and Spring Security.• Developed reusable UI components in React.js and Angular integrated with RESTful APIs.• Migrated monolithic architecture to Microservices deployed on AWS ECS with CloudFormation.• Implemented CI/CD pipelines with Jenkins, Docker, and Kubernetes for seamless deployment and scaling.• Used Swagger for API documentation and Rest Assured for integration testing.• Managed relational and NoSQL databases including PostgreSQL, MongoDB, and Oracle SQL.• Collaborated with cross-functional teams in agile environment; participated in daily stand-ups, sprint planning, and code reviews.• Reduced deployment time by 50% by setting up automated CI/CD pipelines.• Improved API performance by 30% by optimizing Hibernate and JPA queries.• Created dynamic REST APIs and integrated third-party services via API Gateway and AWS Lambda.• Implemented OAuth2.0 and JWT-based authentication for securing Microservices.• Design fault-tolerant architectures using Elastic Load Balancer, Auto Scaling, and Aurora databases.• Implement S3 for static content delivery and Lambda functions for serverless data processing.• Integrate AWS IAM roles for secure API access and cloud service permissions.• Write unit tests using JUnit and Mockito to ensure code reliability and functional correctness.• Perform API testing with Rest Assured and develop automated test scripts for regression testing.• Conduct integration and end-to-end tests to validate user workflows.• Ensure high code coverage and maintain CI test pipelines for every commit.
EDUCATION
Maharishi International University
Master's degree, Computer Science
Eritrea Institute of Technology
Bachelor of Applied Science - BASc, Computer Science
ABOUT YOSIEF GEBREWOLD
Highly skilled Java Full Stack Developer with over 5+ years of hands-on experience designing, developing, and deploying scalable web applications and enterprise-level systems in agile environments. Proficient in Java 8+, modern JavaScript frameworks like React.js and Angular, and backend development using Spring Boot, Hibernate, and Node.js. Adept in CI/CD, cloud computing (AWS), and containerization using Docker and Kubernetes. Strong knowledge of RESTful APIs, unit/integration testing, and DevOps pipelines with a passion for continuous improvement and clean code practices.
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