Mark Herman

markdsouza1998@gmail.com | (571) 977-0812 | Sterling, VA

Summary:
● 6+ years of IT experience in developing web based SOA and Client/Server applications in multiplatform
environments with Java/J2EE & Cloud technologies.
● Working experience with OOPS Concept, Collections, Exception Handling, Multithreading, Data Structure
and Algorithms.
● Experienced in Design Patterns like Singleton, Factory, Business Delegate, DAO, MVC, Front Controller,
Visitor, observer, Service Locator, Session Façade.
● Experienced in Spring Framework such as Spring IOC, Spring Resources, JDBC, Spring MVC, Spring Security,
Spring Boot, JSF, Microservice.
● Experience using Object Relational Mapping (ORM) tool like Hibernate and JPA.
● Expertise in client scripting language and server scripting languages like HTML, CSS, JavaScript, jQuery,
Angular, JSP, NodeJS, Typescript, and Bootstrap.
● Proficient in developing and consuming SOAP & Restful Services in Microservices and decoupled
architecture using WSDL, SOAP, JAX-WS, CXF, AXIS, JAX-RS.
● Excellent experience in Restful Web services and Big Web service development and consumption using
(JAX-RS and JAX-WS).
● Experience with MQ Series & JMS to communicate between middleware components.
● Experienced with AWS cloud resources including maintaining EC2 instances, S3 buckets, Virtual Private
Clouds, Elastic Load Balancers,
● Proficient in Database Design, creation, and management of Schemas, writing Stored Procedures,
functions, Triggers, DDL, DML SQL queries.
● Experience in relational databases like Oracle, PostgreSQL, MySQL, MS SQL Server using SQL, PL/SQL
programming and NoSQL database MongoDB.
● Experience with Version Control Systems like CVS, SVN, GIT.
● Working knowledge with container-based deployments using Docker images, Docker hub, and Docker
registries, as well as installing and configuring Kubernetes
● Experienced with IDEs like Eclipse, Spring Tool Suite (STS), RAD, and IntelliJ.
● Experienced with deploying applications on to production servers, configuring parameters of servers like
Apache Tomcat, JBOSS, WebLogic, & WebSphere.
● Experienced in debugging using Log4j and Unit & Integration Testing using J-Unit.

Technical Skills:

Languages : Java/J2EE, SQL, C, C++, PL/SQL.

Working Experience:

Java Developer

Responsibilities:
● Implemented Agile (Scrum) Methodology that includes daily scrum meeting with team, sprint planning
and estimating the tasks for the user stories.
● Responsible for understanding the High and Low-level Design documents for the new functionalities being
implemented including Use case Diagram.
● Designed new UML diagrams through Use Case Diagrams, Class Diagrams, Sequence, components,
activity.
● Developed Web Services using SOA technologies such as REST.
● Implemented the business layer by using Hibernate with Spring DAO and developed mapping files and
POJO java classes using ORM tool.
● Responsible for creating efficient design and developing User Interaction screens using HTML5, CSS3,
JavaScript, Angular and Bootstrap.
● Designed and developed Micro Services business components and RESTful service endpoints using spring
boot.
● Involved in designing and creating the Database Tables using PostgreSQL Database.
● Used Hibernate to store the persistence data into the PostgreSQL database and wrote HQL to access the
data from database.
● Created AJAX requests to REST service using Angular built-in http & resource objects.
● Developed Microservices business components and RESTful service endpoints using Spring Boot.
● Developed JMS components to send messages from one application to another, internally.
● Deployed multitude apps utilizing most of the AWS stack focusing on high-availability.
● Defined Hibernate Named Queries for performing batch while defined Criteria Queries for Microservice.
● Composed and executed MongoDB scripts to insert and update NoSQL database as well as automating
data changes and reporting.
● Developed scripts for build, deployment, maintenance, and related tasks using Jenkins.
● Implemented JBOSS app server integration with JBPM process engine and Eclipse IDE.
● Used tools like JIRA for ticketing purpose and Maven as a build tool.
● Used Kafka as messaging system and performed validation jobs using Java visual VM.
● Implemented application-specific Exception Handling and logging framework using Log4J and ANT scripts
for building the applications.
● Used GIT as source control management giving a huge speed advantage on centralized systems that must
communicate with a server.
● Tested, debugged and implemented the application using J-Unit for unit testing.

Java Developer

Responsibilities:
● Responsible for Requirements Gathering, Conceptual Design, Analysis, and design, Development and
System Testing using Agile Methodology.
● Used Multithreading concept to load data from files to tables, transforms files from one format to other.
● Used Rational Rose for the Use Case Diagrams, Object Diagrams, Class Diagrams and Sequence Diagrams
to represent the detailed design phase.
● Developed and consumed JSON based RESTful services using Spring MVC and Spring Boot.
● Used Spring IOC configured Application Context files and performed database object mapping using
Hibernate annotations.
● Involved in the creation of interface to manage user menu and Bulk update of Attributes using Node.JS
and jQuery.
● Implementing or exposing the Micro service architecture with Spring Boot based services interacting
through a combination of REST and Apache Kafka message brokers.
● Developed HTML interfaces with an understanding of UI design principles and Object-Oriented program
development.
● Used SOAP based web services to develop interfaces to integrate between front end systems and back-
end systems.
● Used Spring Boot at backend which helps to develop application with ease.
● Refactored the monolithic code in those Microservices projects.
● Troubleshoot AWS EC2 Status check including System Status checks & instance Status check alerts.
● Used Oracle as database and Involved in the development of PL/SQL backend implementation and using
SQL created Select, Update and Delete statements.
● Coded Oracle PL/SQL and PostgreSQL stored procedures.
● Involved in creating the Hibernate POJO Objects and mapped using Hibernate Annotations.
● Used JMS to send/receive asynchronous data from various message brokers
● Integrated with MDM for managing user data, login and registration information are retrieved from MDM
and synced with E commerce database
● Used Eclipse for development environment and SVN for version control software.
● Used SVN as version controlling tool as it provides flexibility and faster solutions.
● Used Maven building tool for creating EAR file deployed in application servers and used for dependency
management of code in application.
● Used Log4j for logging messages and Rational Clear Case for version Control.
● Developed test cases and performed unit test using J-Unit Framework.
● Used JIRA ticketing system to keep track of issues and tasks on individuals.

Java Developer

Responsibilities:
● Participated in requirement gathering and framework implementation sessions through Agile TDD
methodology.
● Developed business components using Core Java concepts and classes like Inheritance, Polymorphism,
Collections, Serialization and Multithreading.
● Implemented ORM in the persistence layer using Hibernate framework in conjunction with Spring AOP
functionality.
● Manipulated HTML elements using AngularJS, and developed external JavaScript codes to use in several
different web pages.
● Developed REST Web services to make web service calls simple and easy for the client to access it with the
help of standard HTTP URIs.
● Created schema documents for XML validation and developed XML schemas.
● Used Active MQ for reliable and asynchronous exchange of important information between multiple
business applications.
● Used Spring Security for Authentication and Authorization of the application.
● Worked with Oracle RDBMS for writing complex queries and PL/SQL for Stored Procedures, Triggers and
Events, for generating some important responses needed by the application at times.
● Used WebLogic server to route the JMS queue messages to various departments. Configured routes in
WebLogic and used JMS in e-mail notification.
● Used Eclipse IDE for code development along with GIT for managing the code and Jenkins for Continuous
Integration.
● Used Maven in each project to automate the builds and managing project.
● Involved in creating the Hibernate POJO objects and mapped using Hibernate annotation for data
persistence.
● Involved in Unit Testing, Functional & Integration Testing for the modules in application.
● Developed and established J-Unit to Unit test the applications involving code reviews, code integration,
and integration testing.

Java Developer

Responsibilities:
● Involved in various Software Development Life Cycle (SDLC) phases of the project which was modeled
using Rational Unified Process (RUP).
● Used Core Java concepts, Multi-Threading, Exception Handling, Collection APIs, Garbage Collections for
dynamic memory allocation to implement various enhancements.
● Worked on JavaScript to validate input, manipulated HTML elements using JavaScript, developed external
JavaScript codes that can be used in several different web pages.
● Developed SOAP web services utilizing business logic for CRUD functionality and Rest. Easy web services
for creating reports.
● Used XML to transfer the application data between client and server. In server-side Servlets is used to
construct and parse the data in XML format.
● Used Hibernate, Object Relational Mapping solution of mapping data onto the Oracle database.
● Deployed and maintained the application in HTTP application server.
● Developed Spring JMS message listeners to consume messages from queue and developed spring
scheduling components to perform batch operations.
● Deployed the application using WebLogic Application Server.
● Designed & deployed server side EJB Session Beans components on Eclipse IDE.
● Used Tortoise SVN Subversion for software version control and Log4J to monitor the Error Logs.
● Develop and execute Unit Test plans using JUnit ensuring that results are documented and reviewed with
Quality Assurance teams responsible for integrated testing.
● Configured and used Log4j for logging all the debugging and error information.
● Involved in peer code reviews and performed integration testing of the modules.

EDUCATION
George Mason University Fairfax, VA
Master of Science in Computer Science January 2021 – December 2022
 Key Modules: Structure Oriented Programming, Object Oriented Programming, Operating Systems,
Machine Learning, Computer Networks, Computer Graphics, Compiler Design,Devops.

Mumbai University Mumbai,India

RESEARCH EXPERIENCE
George Mason University Fairfax,Va
Spatial Agent Based Simulation Modelling (Master's Thesis) January 2022 – December 2022
 Initiated simulation of a large-scale cyber-physical infrastructure with interdependencies to test 3+ communications
scenarios across the interdependent infrastructures and assess resilience during cascading failures with a Java-based
Anylogic simulation tool.