SUMMARY

• Full - stack developer with 6+ year of professional experience, mainly in E-Commerce and Employee Management System.
• Hands-on experience in developing and implementing micro-services using SpringBoot, Spring Cloud.
• Experienced in developing cloud solutions using Spring Cloud (Config-Server, Eureka, Hystrix, API Gateway, Zipkins/Sleuth).
• 6+ years of Java/J2EE experience. Skilled in Core Java concepts, including Object Oriented Programming (OOP), generic annotation, collection framework, I/O, exception handling, garbage collection, Multi-Threading.
• Deep knowledge of developing solution using distributed message echo-hub platform using Kafka and Kafka Streams.
• 6+ years in back-end service design and development using Spring Spring MVC, Spring IOC, Spring AOP, Spring Security.
• Proficient in back-end service design and development using Spring MVC, Rest Service.
• Working Experience with ORM technology such as JDBC, Hibernate, JPA, Mybatis.
• Proficient in RDBMS such as Oracle and MySQL, working knowledge of writing SQL queries and data analysis.
• Experience in using Redis, H2-database in-memory data structure store.
• Experience in using project management and comprehension tools in software development such as Confidential .
• Familiar with JUnit Test, Integration Test, Regression Test, Functional Test and test automation using tools such as Junit and Spring Testing.
• Experience in using Apache Tomcat7.0 as Application Servers.
• Experience in using Chrome Developer Tool, Post m an as debug tools.
• Familiar with different operation systems, Mac OS/Linux/Windows.
• Experience using Git as version control tool to manage large-scale code base.
• Familiar with Network Communication Protocol, i.e. HTTP request(GET, PUT), TCP, UDP.
• 2+ years with front-end development using: Angular 6, 2+ years using HTML5, CSS3, JavaScript, JQuery, and AngularJS.
• Experience in using NPM as Package management tools.
• Experience in Agile, Slack methodology and Daily Scrum meeting.

TECHNICAL SKILLS

• Java, SQL, TypeScript, J2EE Technologies, JSP, Servlets, Web Services, JDBC, XML, Log4j
• Framework Tools Spring, Spring Boot, Hibernate, Mybatis, JPA, Confidential
• Web Technologies HTML, XML, CSS, AJAX, JSON, REST, Angular6
• Application Servers
• Apache Tomcat
• Database Oracle 11g/10g, MySQL, Redis, H2-database
• Testing/Control Tools JUnit, Git
• Java Frameworks/Libraries Spring MVC, Spring IOC, Spring AOP, Spring Security, Spring Boot, Spring Web, Spring Cloud

PROFESSIONAL EXPERIENCE

Confidential, Trenton, NJ

Responsibilities:

• Developed multiple micro services based on Spring Boot.
• Used Oracle database to store applicant data and info.
• Used JPA(Java Persistence API) for storing, accessing, and managing Java objects in a relational database.
• Developed Spring Cloud Micro services include applicant service and applicant detail service.
• Developed Spring Cloud Zuul API Gateway to dispatch different URL to proper back-end micro services.
• Utilized Zuul Gateway Embeded Ribbon Load Balancer to distribute requests coming from client application equally between running instances of micro services.
• Used H2 Database to cache data for testing.
• Used Postman for performing integration testing with API.
• Built RESTful Web Services.·
• Developed Controller layer, Service layer, Data layer and VO layer for each micro service.
• Added Spring Security on each micro service, Zuul API Gateway and Eureka Server for authorization and disable the cross side’s requests.
• Developed Spring Cloud Config Server to support for externalized configuration in a distributed systems.
• Added bootstrap.properties on each micro service to connect with Config Server.
• Utilized Spring Cloud Bus to broadcast configuration changes to all subscribed micro services while running.
• Used Kafka as Message Broker to ensure micro services communicate with each other.
• Used Spring Actuator to monitor and manage applications.
• Created RestTemplate to ensure micro services communicate with each other.
• Used Spring Cloud Sleuth to create Trace ID and Span ID on each micro service communication.
• Used Zipkin Server to trace micro services communication.
• Used ELK Stack to realize aggregate config files, search config files and view config files.
• Utilized Spring Profiles to create different configurations for different environments (development / production).
• Configured Git repo for micro services and manage all configuration files with Config servers.
• Utilized Git for version control.

Environment: Java, Eureka, Zuul API Gateway, RESTful Web Services, Spring Boot, Spring Cloud, Spring Security, JPA, JDBC, Spring IOC, Dependency Injection, CORS Filter, Confidential, Log4j, JUnit, H2-database, Tomcat, kafka, Oracle.

Confidential, Philadelphia, PA

Responsibilities:

• Developed the back-end application using Spring Boot Java-based framework.
• Used Oracle to store user information and related product information.
• Used Redis as cache to store user’s cart information.
• Developed Data Access Objects (DAO) layer to handle the details of the persistence mechanism.
• Developed Pojo layer to operate with database.
• Configured Mybatis XML mapping files to implement Object Relational Mapping(ORM) using Mybatis to build connections between POJO and Oracle database.
• Configured different beans using Spring IOC to inject common services and controllers.
• Developed Service layer to provide logic to operate on the data sent to and from the DAO and the client.
• Developed Controller layer to handle the navigation between the different views.
• Developed View Object (VO) package to return results to the front-end.
• Developed form package to receive multiple request information from front-end.
• Developed exception package to handle different false requests.
• Utilized Spring Security to provide authentication and authorization for users to sign in, sign up and log out.
• Used CORS(Cross Origin Resource Sharing) Filter to enable cross origin requests.
• Used Log4J to logging, debugging, and providing warnings and info on the server console.
• Used Gson to transform class to Json format or transform Json format to class.
• Created Interceptor to prehandle the request from front-end.
• Created JUnit test for Unit Testing on Java class.
• Used Observables to resolve data transfer between front-end and back-end.
• Using Angular CLI to build development environment.
• Worked with UX team to implement the UI design using HTML5, CSS3, Bootstrap and Angular 6. Used TypeScript to build Components, Directives, Services and Pipes based on Angular 6.
• Build Single Page Application using Angular6 component and router.
• Implemented rating system component to rate products using Eventemitter.
• Coded navigation bar using Angular Router to navigate and pass data between different components.
• Created Guard Service to prevent invalid routing address for security purpose.
• Used ngModel to achieve two-way binding and using ngIf to display custom validations message and error message.
• Utilized local storage to stored user information on client side to improve user experiences.
• Applied Angular HTTP Service to consume RESTFul web servers from backend.
• Applied Projection to build reusable components and make applications more scalable and flexible.
• Utilized Brower Developer for front-end testing.

Environment: Java, Spring Boot, Mybatis, JDBC, Spring IOC, Spring Security, SQL, CORS Filter, Confidential, Log4j, JUnit, NPM, HTML5, CSS3, Bootstrap, Angular6, TypeScript, ES6, Redis, Oracle.

Confidential, Louisville, KY

Responsibilities:

• Used Spring Boot to develop RESTful controller and Service layer to handle request.
• Used J2EE Design Patterns such as Singleton Pattern, Factory Pattern and so on.
• Develop Java, J2EE, Hibernate and Spring Framework on server side.
• Used Spring framework and Hibernate ORM to implement the middle tier with Spring IoC, AOP, Hibernate Dao Support and other features.
• Managed dependency with Confidential and developed backend services based on Spring MVC design pattern.
• Used Hibernate, object/relational-mapping (ORM) solution, technique of mapping data representation from MVC model to Oracle database.
• Used Ajax for asynchronous partial refreshing and request handling.
• Implemented Spring Servlet for delegating to POJO and called Controllers to dispatch incoming http requests.
• Implemented Spring DAO Support integrated with Hibernate framework to contact with database.
• Utilized Hibernate Cache to optimize database query and reduce connection with the database.
• Utilized Spring Security for authentication and validation of user signup, login and logout protecting employee privacy and critical payment information.
• Implemented different functions based on Core Java collection, multi-threading, reflection, I/O, Exception Handling, generics.
• Fixed JSON parser issues to improve communication efficiency between front end and back end.
• Used CORS(Cross Origin Resource Sharing) Filter to enable cross origin requests.
• Conducted unit test of the project using Junit and debugging with Log4j.
• Developed Postman to test transmission of REST API.
• Developed front-end using HTML, CSS, Bootstrap.
• Used Git as source code version control.
• Deployed the applications in AWS as EC2 instances and create snapshots for the data that stored in AWS S3.
• Involved in gathering the requirements, analyzing the employee specifications, developing and testing.

Environment: Oracle, HTML5, CSS3, Bootstrap, ES6, Java, Spring MVC, Hibernate, JDBC, Spring IOC, Spring Security, SQL, CORS Filter, Confidential, Log4j, JUnit, NPM.

Confidential, Santa Clara, California

Responsibilities:

• Involved in Agile software development, attend daily Scrum meeting.
• Used Oracle to store HR information.
• Developed Servlets and JSPs based on MVC pattern using Spring Framework.
• Utilized Confidential to build project and configured pom.xml to inject dependency.
• Deployed Hibernate ORM(Object Relational Mapping) to map data in Oracle database.
• Configured different beans using Spring IOC to inject common services and configurations.
• Built controller class and coded SQL queries for mapping and responding to the requests from front-end.
• Used Spring Security to provide authentication and authorization for HR to sign in and sign up.
• Utilized CORS(Cross Origin Resource Sharing) Filter to enable cross origin requests.
• Created JUnit test for Unit Testing on Java class.
• Built internal website for employees using HTML, CSS, LESS, JavaScript, Bootstrap and JQuery.
• Implemented front-end component such as Navigation bar, Dropdown menu, Pagination, Modal, Form, and Table.
• Created Filter like type filter, singleton filter, alpha filter and word filter to filter row data based on different keywords.
• Utilized JSON as data format and resolved data transfer between back-end and front-end using Ajax promise.

Environment: Agile, Oracle, Scrum, HTML, CSS, LESS, JavaScript, Bootstrap, JSP, JQuery Ajax, JSON, Java, Spring MVC, Servlets, Confidential, Hibernate ORM, Spring IOC, SQL, Spring Security, CORS Filter, JUnit.