SUMMARY

• 5+ years working experience in Java Full - Stack Development
• Solid skills in Algorithm and Data Structure
• Strong knowledge of Java core concepts including Object-Oriented Programming, Concurrency and Multi-threading, Exception handling, Collections, Serialization, I/O, and Garbage Collection
• Proficient in Design Pattern including Builder, Singleton, Factory Method, Abstract Factory, Adapter, Proxy, Iterator, Observer, etc.
• Extensively usage of the HTTP request (GET, PUT, POST, DELETE, HEAD, OPTIONS) and handling response
• Extensively developed J2EE applications including Servlet, JSP, JSTL, JNDI, JDBC, etc.
• Skillful in SQL queries, Views, Stored Functions, and Stored Procedures
• Rich experience with ORM tools, including Hibernate, which implements Java Persistence API (JPA), and CURD on database manipulation with HQL and Criteria
• Extensively implemented MVC (Model, View, Controller) structural web application
• Excellent knowledge in Spring Core with Dependency Injection (DI), Beans, IoC, and Annotations
• Hands-on experience with Spring MVC on DispatchServlet, HttpMessageConverter
• Deep understanding in Spring Boot with RestController and JSON Mapping
• Rich experience in Spring Security including SecurityContextHolder, Principal, Filter, and JWT
• In-depth implementation with Spring Data JPA with Data Repositories
• Hands-on experience with Spring Exception handling with Spring AOP (Aspect Oriented Programming) and ControllerAdvice
• Rich skills with Swagger for Rest Documentation
• Substantial work in Microservice including Spring Cloud, Gateway, Eureka, and Feign
• Robust knowledge in Fault Tolerance with Circuit Breaker including Resilient4j and Hystrix
• Solid skills with Asynchronous Programming including ExecutorService and @Async
• Solid experience in Cloud service, including RDS and S3
• Excellent knowledge of NoSQL database, including MongoDB
• Hands-on experience with In-memory data store including Redis
• Deep understanding in messaging with AMQP, including RabbitMQ and its Pub/Sub pattern
• Proficient in Angular, including Dependency Injection with Service, Observable, Components, Pipes, and Routes
• Sound implementation with React development, including Redux, React-Router, Redux, Thunk, and HOC
• Extensively used Java testing and Test-Driven Development (TDD) with JUnit and Mockito, and code coverage with JaCoCo
• Skillful on Spring Boot Actuator for monitoring with /info, /health and /metrics endpoints
• Excellent worked in Batch processing with Spring Batch
• Rich experience in Java Logging with Log4j and ELK (Elastic Search, Logstash, Kibana)
• Proficient in Software Development Life Cycle (SDLC) and software development methods like Agile Development and Scrum Framework
• Expert at version control tool like Git and Jira for ticket tracking
• Configured CI/CD pipeline for the application using Jenkins and Kubernetes

TECHNICAL SKILLS

Programming Languages: Java, SQL, HTML/CSS, JavaScript, C#, C/C++, Python, Go, PHP, Scala

Frontend: Angular, React, Redux, Thunk, Axios, jQuery, Ajax, Bootstrap

Backend: Servlet, JSP, JSTL, Hibernate, Spring Core, Spring MVC, Spring Boot, Data Repository, RabbitMQ, AOP, Actuator, Spring Security, Spring Cloud, Microservices, Eureka, Feign, Gateway, JWT, Resilient4j

Web development: REST, SOAP, AMQP

Database: MySQL, MongoDB, Oracle SQL, H2, Redis

Tools: Maven, Postman, Git, Slf4j, JUnit, Mockito, Jacoco, Swagger

Cloud Computing: RDS, S3, ElasticSearch, Docker, Kubernetes, Google Cloud SQL

IDE: Eclipse, Intellij, VSCode

Operating System: Windows, Linux

Methodologies: Agile, Scrum

PROFESSIONAL EXPERIENCE

Confidential

Full Stack Developer

Responsibilities:

• Involved SDLC model with SCRUM Model and separated each module development with a single sprint
• Developed React with Routing to create a single-page web application
• Integrated Redux and Persistent storage for React component communication
• Designed Functional Components and Hooks (useState, useEffect) to initialize and update the input
• Triggered backend service with Axios call
• Used Spring Cloud Gateway to route APIs
• Integrated Microservice architecture with RESTful API for backend service
• Set up management between composite service and core service with Eureka for services registration and discovery and Feign client for services communication.
• Stored the service config file into GitHub and used Spring Cloud to configure the microservices in bulk
• Implemented POJO class to receive frontend data and map to the related table in the database
• Developed Data Repository to create database queries
• Used MongoDB as a NoSQL database to store the data
• Implemented fast read with Redis as an in-memory database
• Developed Custom Comparator to sort data by timestamp with Lambda Expression
• Involved Asynchronous data pipelines for periodic events with Scheduler
• Created Custom Exception on DAO layer and Service layer
• Designed and implemented test plan with JUnit for functions and Mockito for controllers
• Served log visualization with Kibana
• Utilized Docker, Jenkins, and Kubernetes to maintain the code with CI/CD pipelines
• Managed version control with Git and push code to GitHub

Technical Environment: Microservice, React, Redux, Spring MVC, Spring Cloud, Data Repository, MongoDB, Eureka, Feign, Scheduler, JUnit, Mockito

Confidential

Full Stack Developer

Responsibilities:

• Utilized Angular to create web component at the frontend
• Developed two-way binding with ngModule to record and update the input
• Implemented @Input, @Output decorators to set up communication between parent component and child component
• Applied custom Validation to make sure the user input is valid
• Used HttpClient to send the data from the frontend to the backend
• Built the backend with Spring MVC for the MVC architecture
• Involved Dependency Injection with IoC Container
• Created MVC structure building blocks, like Repository, Controller, Service, DAO, Domain, etc.
• Wrote @CrossOrigin annotation to enable cross-origin resource sharing
• Integrated MongoDB as a database to store the subscription information
• Configured NoSQL database query with Hibernate OGM
• Added Geolocation to get the latest jobs information around
• Set Scheduler to send emails to all subscriptions every day
• Utilized Jira to track issues
• Bundled dependencies package with Maven and built the project
• Used Git as version control and GitHub as the code repository

Technical Environment: Angular, HttpClient, Spring MVC, MongoDB, Scheduler, Hibernate, Maven, Git, Intellij, VSCode

Confidential

Full Stack Developer

Responsibilities:

• Followed Agile software development methodology for the project development
• Used Angular framework with routing to create a dynamic frontend page
• Built multi-step form with reusable Angular component and central services ( Dependency Injection ) for data transfer
• Involved HttpClient to make HTTP requests (GET, POST, PUT, DELETE) from frontend to backend
• Designed and injected service into different components and used Observable for component communication
• Integrated Spring Boot and Spring MVC for backend service development
• Implemented Single Sign-on with JWT token
• Stored JWT at LocalStorage to improve user experience
• Involved Spring Security for authorization with AntMatcher
• Disabled Cross-Site Request Forgery (CSRF) with Spring Security
• Wrote Resolver to delay page rendering before data complete fetching
• Utilized @PathVariable to receive data from URI template
• Add @RestController annotation makes the method inside the class as Servlet and returns @ResponseBody
• Applied authentication with JWT Bearer token at HTTP Request Header
• Deployed MySQL database on AWS RDS
• Configured AWS S3 for document storage
• Implemented MultipartFile to receive files from frontend to backend
• Used ORM (Hibernate) to fetch and persist data
• Performed dynamic fetching with HQL and lazy fetch type
• Involved Maven to manage the packages and build the project
• Integrated AspectJ for Spring AOP and used Advice for controller performance checking and logging
• Created the project with IntelliJ IDEA
• Used Git for version control and Jira for ticket tracking

Technical Environment: Angular, Maven, Spring Core, Spring Security, Spring MVC, Hibernate, RDS, S3, JWT, Intellij, VSCode, AspectJ

Confidential

Full Stack Developer

Responsibilities:

• Designed webpage workflow with Adobe XD
• Implemented an interactive web page with HTML/CSS and JavaScript
• Beautified the webpage with Bootstrap
• Integrated Tomcat as the web application container
• Worked with jQuery for interactive web page
• Created and registered Servlet to receive and handle HttpRequest
• Involved MVC structure to implement the backend. Controller for HTTP request and response, service for business logic, and DAO for data access.
• Designed POJO class to receive data from the frontend
• Set Attribute to save the data in Servlet and dispatch to JSP page
• Imported JSTL to dynamically display the data sent from the backend
• Implemented data access logic with Hibernate and JDBC
• Clustered MySQL database on AWS RDS
• Wrote Stored Procedures to improve database query
• Added HikariCP as connection pool to decrease the overhead of creating the database connection
• Involved EHCache as hibernate second-level cache to improve the performance of database query
• Developed the application on Eclipse
• Managed packages and installed packages with Maven and clean and build the project during the development
• Debugged JavaScript program with Chrome Developer Tools
• Tested the backend servlets with Postman
• Used Git for version control

Technical Environment: J2EE, Maven, Servlet, HTML, CSS, JSP, JSTL, Hibernate, HikariCP, EHCache, Eclipse, Postman, Git