Daniel Chmielewski

Daniel Chmielewski Email and Phone Number

Full Stack Java Developer @ AT&T
Delray Beach, FL, US
Daniel Chmielewski's Location
Delray Beach, Florida, United States, United States
Daniel Chmielewski's Contact Details

Daniel Chmielewski work email

Daniel Chmielewski personal email

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About Daniel Chmielewski

Daniel Chmielewski is a Full Stack Java Developer at AT&T.

Daniel Chmielewski's Current Company Details
AT&T

At&T

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Full Stack Java Developer
Delray Beach, FL, US
Daniel Chmielewski Work Experience Details
  • At&T
    Full Stack Java Developer
    At&T
    Delray Beach, Fl, Us
  • At&T
    Full Stack Java Developer
    At&T Dec 2019 - Present
    Dallas, Tx, Us
    Responsibilities: • Involved in Requirements gathering, Designing, Coding, Unit testing and Integration Testing phases of the project.• Responsible for design and development of UI screens for the application using HTML5, JavaScript, React JS, jQuery.• Implemented RESTful web services to make rest calls from client to server.• Involved in developing code for obtaining bean references in spring framework using Dependency Injection (DI) or Inversion of Control (IOC).• Used Spring JDBC and Spring Hibernate to manage Data Access with DAO design pattern.• Used Spring Boot and developed the application as micro services.• Developed Spring Batch processing java application to read different file formats which feeds to the database.• Implemented JMS using Spring JMS module to communicate with queues.• Created builds using Maven and pulled the project code from GitHub repositories.• Used Jenkins as CI tool.• Wrote Stored Procedures and complex queries in Oracle 12g database. • Developed integration modules for disparate clients using Apache Camel.• Integrated configured Camel with Active MQ to use it as bus.• Worked with Python scripts• Deployed in Linux environment and used Tomcat as application server, UNIX shell scripts for data migration and batch processing.• Developed test cases using Junit, TestNG and created stubs using JMockito framework.• Implemented the project in agile methodology & participated actively in daily stand up calls.• Served as POC for on call support in the production team on a rotation basis. Environment: JDK 1.8, J2EE, Core Java, HTML5, CSS3, JavaScript, React JS, jQuery 2.0, JSON, Maven 3.0, Spring 5.0, JPA, JDBC, Python, Jenkins, PostgreSQL, Apache Tomcat 8, Apache Camel, NodeJS, Active MQ, Git, Eclipse IDE, Junit, AWS, Linux, Windows.
  • Keybank
    Full Stack Java Developer
    Keybank Jan 2018 - Nov 2019
    Cleveland , Ohio, Us
    Responsibilities: • Involved in Analysis, Design, Development, UAT and Production phases of the application.• Participated in JAD sessions gathering along with the Business Analysts.• Designed application modules, base classes and utility classes using Core Java. • Implemented the project as a multi-tier application using Spring MVC & used core spring concepts like AOP, IOC.• New library development with micro services architecture using Rest APIs, spring boot.• Expertise in Core Java with strong understanding and working knowledge of Object-Oriented Concepts like Collections, Multi-Threading, Concurrency framework.• Implemented a SOA compliant system working on various transactional messaging using Camel and used Session Beans Message Driven Beans.• Coded various business process methods required for creation of Web Services related to customer information and provider information, using JAX-WS, SOAP, WSDL and JAX-RS, REST web services.• Implemented Hibernate for data persistence and management.• Integrated spring with Hibernate as the data abstraction to interact with the databases.• Implemented Singleton, Factory, DAO design Patterns based on the application requirements.• Consumed and built web services in SOAP, REST supporting both XML and JSON by taking advantage of Spring technologies.• Developed the Presentation layer using HTML 5, JavaScript, and used AJAX/ jQuery based rich UI for improved customer experience. • Developed single page application by using Angular JS.• Developed Session Beans to process user requests and to load and store information from database • Used Maven build tool and deployed into IBM Web Sphere 8.5 Application Server.• Used GIT for version control and Jenkins used for continuous integration.• Wrote Stored Procedures and complex queries in Oracle 11g database. • Designed and developed JUnit test cases during the development phase. • Implemented the project using agile-scrum methodologies.
  • Qburst
    Java Developer
    Qburst Sep 2014 - Oct 2016
    Chantilly, Virginia, Us
    Responsibilities:• Designed UML diagrams using Rational Rose software.• Developed Web Pages using HTML 4.01, CSS.• Worked with core Java code extensively using interfaces and multi-threading techniques.• Involved in developing applications using Java, J2EE and Struts.• Developed and configured the java Beans using Struts.• Created Web.xml, Struts-config.xml, Validation.xml files to integrate all the components struts.• Extensively used JSTL tag libraries.• Involved in the developing of MAVEN POM.XML files and deployment in JBoss Application Server.• Developed SQL stored procedures and prepared statements for updating and accessing data from database.• Conducted the SQL performance analysis on Oracle database tables and improved the performance by SQL tuning.• Used Log4j for logging mechanism and developed wrapper classes to configure the logs.• Used JUnit and Test cases for testing the application modules.• Used SVN for version control.Environment: Core Java, Struts, Servlets, JSP, Java Script, Web Services, CSS, Scrum, MAVEN, JBoss, Oracle, Log4j, HTML, JUnit, SVN, Eclipse IDE

Frequently Asked Questions about Daniel Chmielewski

What company does Daniel Chmielewski work for?

Daniel Chmielewski works for At&t

What is Daniel Chmielewski's role at the current company?

Daniel Chmielewski's current role is Full Stack Java Developer.

What is Daniel Chmielewski's email address?

Daniel Chmielewski's email address is daniel.chmielewski@att.eu

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