Java Developer at Cognizant

Designed and developed RESTful APIs using Java (Spring Boot) to support scalable microservices architecture, improving response times by 35%. Implemented JWT-based authentication and OAuth 2.0 authorization, enhancing application security compliance with industry standards. Migrated legacy monolithic applications to microservices, reducing deployment time by 40% and increasing modularity. Integrated Apache Kafka for asynchronous messaging, improving data pipeline throughput by 25%. Collaborated in Agile/Scrum teams and wrote complex SQL and JPQL queries for performance tuning, resulting in 20% faster data retrieval. Utilized Hibernate/JPA for ORM, developed and deployed Java microservices in AWS, and built CI/CD pipelines with Jenkins, GitHub Actions, and Docker, reducing manual errors by 80%. Performed unit and integration testing achieving 95% code coverage, configured ELK Stack monitoring, refactored legacy code to Java 17 standards, developed API documentation with Swagger/OpenAPI,

Full Stack Java Developer at Delta Information Systems

Developed and maintained enterprise web applications using Java 11+, Spring Boot, React.js, and MySQL, improving system performance by 28%. Designed RESTful APIs for microservices architecture, reducing API response times by 35%, and implemented JWT-based authentication using Spring Security. Deployed applications using AWS with Jenkins and GitHub Actions CI/CD pipelines, cutting release time by 40%. Optimized SQL queries for 20% faster retrieval and refactored legacy code, reducing codebase size and improving maintainability. Collaborated with UI/UX designers and backend engineers in Agile sprints to deliver product features. Conducted unit testing achieving 85% coverage, used Docker and Kubernetes for containerization, documented APIs with Swagger/OpenAPI, integrated third-party APIs (Stripe, Twilio, SendGrid), and contributed to code reviews and performance testing using Postman and JMeter.

Java Developer/AWS Architect at Gebeta Maps

Led migration of monolithic application to AWS cloud-native architecture, improving scalability and 99.9% uptime SLA. Developed RESTful APIs handling over 2M API requests/day with optimized response times. Architected serverless AWS Lambda, API Gateway, DynamoDB solutions, reducing infrastructure costs by 40%. Managed CI/CD pipelines using AWS CodePipeline, CodeBuild, and Jenkins with 100% automated deployments, reducing release cycles from 2 weeks to 2 days. Managed Docker and Kubernetes (EKS) deployments, improving reliability and consistency. Improved Java ETL workflows with AWS Glue and Apache Spark by 60%. Implemented OAuth 2.0 and JWT authentication. Set up monitoring via AWS CloudWatch and ELK, resolving 95% of anomalies proactively. Designed infrastructure as code with Terraform and AWS CloudFormation. Led and mentored a team of 4 developers, and improved frontend hosting with S3 and CloudFront for 80K+ daily users.

Senior Software Engineer/Full Stack Java Developer at Commercial Bank of Ethiopia

Engineered RESTful APIs with Spring Boot for mobile banking, increasing active users by 25%. Integrated third-party services with OAuth2 and JWT. Developed microservices architecture, improving scalability and reducing downtime by 35%. Optimized Oracle SQL queries, improving transaction speed by 40%. Automated CI/CD pipelines with Jenkins and Docker, reducing deployment times from hours to under 15 minutes. Migrated legacy JSP apps to Spring MVC, enhancing maintainability. Developed UI components with React.js and Redux, accelerating frontend development by 30%. Implemented role-based access control with Spring Security. Achieved 90%+ testing coverage. Led Docker containerization and Kubernetes orchestration. Delivered a secure customer onboarding system, reducing manual processing by 60%. Provided production support and bug fixes, decreasing incident resolution times by 45%.

Java Developer at Cognizant

Designed and developed RESTful APIs using Java Spring Boot to support scalable microservices architecture, improving response times by 35%. Implemented JWT-based authentication and OAuth 2.0 authorization, enhancing application security compliance. Migrated legacy monolithic applications to microservices, reducing deployment time by 40%. Integrated Apache Kafka for asynchronous messaging, improving data pipeline throughput by 25%. Collaborated with cross-functional teams in Agile/Scrum environments. Utilized Hibernate/JPA for ORM and deployed microservices in AWS Cloud using EC2, Lambda, and RDS. Built CI/CD pipelines with Jenkins, GitHub Actions, and Docker, achieving 95% code coverage through unit testing. Monitored applications using ELK Stack. Mentored junior developers and improved API documentation with Swagger.

Full Stack Java Developer at Delta Information Systems

Developed and maintained enterprise web applications with Java, Spring Boot, React.js, and MySQL, improving performance by 28%. Designed RESTful APIs to support microservices, reducing API response times by 35%. Integrated JWT authentication with Spring Security and deployed applications on AWS using CI/CD pipelines, cutting release time by 40%. Optimized SQL queries and modularized backend services for maintainability. Collaborated with UI/UX and backend teams in Agile sprints. Used Docker and Kubernetes for containerization. Created reusable React components, improving frontend development speed by 25%. Integrated third-party APIs like Stripe, Twilio, and SendGrid, enhancing product features.

Java Developer/AWS Architect at Gebeta Maps

Led migration to AWS cloud-native architecture achieving 99.9% uptime SLA. Developed RESTful APIs handling over 2 million daily requests with optimized response times. Architected serverless solutions with AWS Lambda, API Gateway, and DynamoDB, reducing costs by 40%. Automated deployments via CI/CD pipelines with AWS CodePipeline and Jenkins, reducing release cycles significantly. Managed Docker and Kubernetes (EKS) deployments. Improved data processing by 60% with AWS Glue and Apache Spark. Implemented OAuth 2.0 and JWT for security and set up monitoring with CloudWatch and ELK stack. Led a team delivering 95% of features on time and documented systems for rapid onboarding.

Senior Software Engineer/Full Stack Java Developer at Commercial Bank of Ethiopia

Engineered RESTful APIs with Spring Boot for mobile banking, boosting active users by 25%. Integrated third-party services with OAuth2 and JWT. Developed microservices improving system scalability and reducing downtime by 35%. Optimized Oracle DB queries for a 40% faster transaction processing. Automated CI/CD with Jenkins and Docker, cutting deployment to under 15 minutes. Migrated legacy JSP apps to modern Spring MVC. Developed reusable React.js frontend components, accelerating frontend development by 30%. Implemented role-based access control with Spring Security. Achieved 90%+ test coverage. Led containerization and Kubernetes orchestration for scalability. Delivered a secure customer onboarding system reducing manual processing time by 60%.

Java Developer at Cognizant

Designed and developed RESTful APIs using Java (Spring Boot) to support scalable microservices architecture; implemented JWT-based authentication and OAuth 2.0 authorization; migrated legacy monoliths to microservices; integrated Apache Kafka for asynchronous messaging; collaborated with cross-functional teams in Agile; wrote complex SQL/JPQL; used Hibernate/JPA; deployed Java microservices in AWS (EC2, S3, Lambda, RDS); built CI/CD pipelines with Jenkins, GitHub Actions, Docker; performed unit and integration testing with JUnit/Mockito; configured ELK Stack for logging; refactored code to Java 17; developed Swagger/OpenAPI docs; mentored two juniors.

Full Stack Java Developer at Delta Information Systems

Developed end-to-end features for enterprise web applications using Java 11+, Spring Boot, React.js, and MySQL; designed and implemented RESTful APIs to support scalable microservices; integrated JWT-based authentication and authorization with Spring Security; deployed applications to AWS (EC2, S3, RDS, Lambda) using CI/CD pipelines with Jenkins and GitHub Actions; optimized SQL queries and indexing, leading to faster data retrieval; modularized backend services and reusable frontend components with React.js; unit and integration testing with JUnit/Mockito; containerized with Docker and Kubernetes; Swagger/OpenAPI documentation; code reviews and collaboration in Agile sprints; performance testing with Postman/JMeter; 6+ product features per quarter.

Java Developer/AWS Architect at Gebeta Maps

Led migration of a monolithic application to a cloud-native AWS architecture; developed RESTful APIs handling 2M+ requests daily; architected serverless solutions with AWS Lambda, API Gateway, DynamoDB; integrated CI/CD pipelines with AWS CodePipeline/CodeBuild and Jenkins; containerized deployments with Docker and Kubernetes (EKS); improved data processing by 60% using AWS Glue and Apache Spark; performance tuning and memory management for Java apps; OAuth 2.0/JWT across distributed services; monitoring with CloudWatch and ELK; Infrastructure as Code with Terraform and CloudFormation; led a team of 4 developers in Agile sprints; S3 static hosting with CloudFront for map layers.

Senior Software Engineer/Full Stack Java Developer at Commercial Bank of Ethiopia

Engineered RESTful APIs with Spring Boot to support mobile banking features; integrated SMS gateway and credit scoring APIs using OAuth2 and JWT; developed microservices for internal banking modules; optimized Oracle DB queries and indexing; automated CI/CD pipelines with Jenkins and Docker; migrated legacy JSP to Spring MVC; designed reusable UI components with React.js/Redux; implemented RBAC with Spring Security; code reviews and best practices; containerized legacy services with Docker and Kubernetes; delivered end-to-end secure customer onboarding.

Java Developer at Cognizant

Designed and developed RESTful APIs using Java (Spring Boot) to support scalable microservices; implemented JWT-based authentication and OAuth 2.0; migrated legacy monolithic applications to microservices; integrated Apache Kafka for asynchronous messaging; built and maintained CI/CD pipelines with Jenkins, GitHub Actions, and Docker; wrote advanced SQL/JPQL queries and used Hibernate/JPA for ORM; deployed services on AWS (EC2, S3, RDS, Lambda); implemented logging/observability with the ELK stack; authored Swagger/OpenAPI docs; mentored two junior developers; led code reviews and contributed to performance tuning and security hardening.

Full Stack Java Developer at Delta Information Systems

Developed and maintained end-to-end features for enterprise web applications using Java 11+, Spring Boot, React.js, and MySQL; built RESTful APIs to support a microservices architecture; implemented JWT-based authentication with Spring Security; deployed to AWS (EC2, S3, RDS, Lambda) via CI/CD pipelines; optimized SQL queries with indexing; modularized backend services; collaborated in Agile sprints; wrote unit and integration tests with JUnit/Mockito; containerized with Docker and Kubernetes; documented APIs with Swagger/OpenAPI; integrated Stripe, Twilio, and SendGrid SDKs; contributed to code reviews; built reusable React components; performed performance testing with Postman and JMeter.

Java Developer/AWS Architect at Gebeta Maps

Led migration from monolithic to cloud-native architecture on AWS; developed RESTful APIs for map-based services handling millions of requests per day; architected serverless solutions with AWS Lambda, API Gateway, DynamoDB reducing costs; CI/CD with AWS CodePipeline/CodeBuild and Jenkins; docker/Kubernetes (EKS) deployments; improved ETL performance with AWS Glue and Apache Spark; implemented OAuth 2.0 and JWT; set up monitoring with CloudWatch and ELK; designed IaC with Terraform and CloudFormation; led a team of 4; designed S3-based hosting for static assets; created microservices using Java Spring Boot.

Senior Software Engineer/Full Stack Java Developer at Commercial Bank of Ethiopia

Engineered RESTful APIs with Spring Boot for mobile banking; integrated third-party services via OAuth2/JWT; developed microservices for internal banking modules; optimized Oracle DB queries; automated CI/CD pipelines with Jenkins and Docker; migrated JSP-based apps to Spring MVC; built reusable UI components with React.js; implemented RBAC with Spring Security; performed unit/integration testing with JUnit/Mockito; contributed to code reviews with SonarQube; documented APIs with Swagger/OpenAPI; provided production support; containerized services with Docker and Kubernetes; led onboarding of a secure customer onboarding system.

Java Developer at Cognizant

Designed and developed RESTful APIs using Java (Spring Boot) to support scalable microservices architecture, improving response times by 35%. Implemented JWT-based authentication and OAuth 2.0 authorization to enhance security. Migrated legacy monoliths to microservices; integrated Apache Kafka for asynchronous messaging; built and deployed Java microservices in AWS (EC2, S3, RDS). Built CI/CD pipelines with Jenkins, GitHub Actions, and Docker; improved deployment reliability by 80%.

Full Stack Java Developer at Delta Information Systems

Developed end-to-end features for enterprise web applications using Java 11+, Spring Boot, React.js, and MySQL; designed RESTful APIs to support microservices; implemented JWT-based authentication; deployed to AWS with CI/CD pipelines; optimized SQL queries and containerized using Docker/Kubernetes; built Swagger/OpenAPI docs and performed unit/integration testing.

Java Developer/AWS Architect at Gebeta Maps

Led migration of monolithic application to AWS cloud-native architecture; developed RESTful APIs for map-based services handling 2M+ requests/day; designed serverless solutions with AWS Lambda/API Gateway/DynamoDB; implemented CI/CD with CodePipeline/CodeBuild/Jenkins; containerized with Docker/Kubernetes (EKS); improved ETL with AWS Glue and Spark; implemented OAuth 2.0/JWT; set up CloudWatch/ELK monitoring; designed IaC with Terraform/CloudFormation; led a team of 4 developers.

Senior Software Engineer/Full Stack Java Developer at Commercial Bank of Ethiopia

Engineered RESTful APIs with Spring Boot to support mobile banking; integrated third-party services via OAuth2/JWT; built microservices; optimized Oracle SQL; automated CI/CD with Jenkins and Docker; migrated legacy JSP-based apps to Spring MVC; created reusable React components; implemented RBAC with Spring Security; performed unit/integration testing and supported production issues; containerized legacy services and led onboarding.

Java Developer at Cognizant

Designed and developed RESTful APIs using Java (Spring Boot) to support scalable microservices architecture; implemented JWT-based authentication and OAuth 2.0 authorization; migrated legacy monolithic applications to a microservices-based architecture; integrated Apache Kafka for asynchronous messaging and data streaming between services; built CI/CD pipelines using Jenkins, GitHub Actions, and Docker; improved observability and debugging with ELK Stack; contributed to code reviews and pair programming; mentored junior developers; refactored legacy code to modern Java standards (Java 17) and documented APIs with Swagger/OpenAPI.

Full Stack Java Developer at Delta Information Systems

Developed end-to-end features for enterprise web applications using Java 11+, Spring Boot, React.js, and MySQL; designed RESTful APIs to support scalable microservices; implemented JWT-based authentication and Spring Security; deployed applications to AWS (EC2, S3, RDS, Lambda) with CI/CD pipelines (Jenkins, GitHub Actions); optimized SQL queries and indexing; modularized backend services; containerized with Docker and Kubernetes; authored Swagger/OpenAPI documentation; participated in code reviews and Agile ceremonies; built reusable frontend components in React.js; integrated third-party APIs (Stripe, Twilio, SendGrid).

Java Developer/AWS Architect at Gebeta Maps

Led migration of a monolithic application to a cloud-native architecture, achieving near 100% uptime; developed RESTful APIs handling 2M+ requests/day; architected serverless solutions using AWS Lambda, API Gateway, and DynamoDB reducing costs; implemented CI/CD with CodePipeline, CodeBuild, and Jenkins; managed Docker/Kubernetes deployments (EKS); improved data processing with AWS Glue and Apache Spark; implemented OAuth 2.0 and JWT for security; set up CloudWatch/ELK for observability; designed Terraform and CloudFormation IaC; led a team of 4 and documented architecture and onboarding processes.