Vanguard DevOps LLC, is looking for an Senior Java Web App Developer to develop and maintain Java web applications. This position is (100% remote) for long term five year project with our Federal Government project. Note: MUST be a U.S. Citizen or green card holder having lived in the U.S. continuously for more than 5 years. (no H1B or H4 visa) - Please don't apply if you are not a U.S. Citizen or GC holder - We CANNOT hire you. Note: DIRECT HIRE ONLY. NO Corp to Corp. Excellent opportunity for an experienced Java developer to join our team supporting a very large Federal Government client. The ideal candidate will have very strong core Java and Spring 4 MVC skills with at least 6 years’ experience building and maintaining Java web-based applications in a Spring 4 MVC architecture with a backend Oracle database. The main roles of the position would be development of new features, functionality, and enhancements on a suite of existing Java web-based applications using Java 8/10, Spring 4 framework, and Oracle Database and running on Oracle WebLogic servers in an AWS environment. Required Qualifications: J2EE web applications developer with a demonstrated proficiency at an expert level developing in all application tiers – model, view, controller, service layer Minimum of 6 years' experience developing Java web applications using Spring 4 MVC, JSPs and Java Servlets - integrating with an Oracle backend database Minimum of 6 years' experience implementing web applications using the Spring 4 framework, including Spring core, Spring MVC, Spring Data, Spring security, and Spring form tag library Strong core Java coding experience, with a minimum of 6 years' experience of core Java Must have a strong understanding, with proven experience in development in all application tiers - client/view, business, service, and data model tiers. Minimum of 6 years' experience developing client-facing web technologies: JSP, HTML5, CSS, JavaScript, jQuery, AJAX, and XML Experienced with JSTL and Expression language Minimum of 6 years' experience with database persistence using Spring Data, JPA, (Oracle ADF is also a plus) Experienced developing REST web services Strong Oracle SQL experience with a minimum of 5 years' experience - developing SQL queries, triggers, stored procedures and creating indexes and optimizing database queries. Strong understanding of web application security principals, and how to prevent and mitigate web app sec vulnerabilities Experience with Maven to manage dependencies and building WAR and EAR files Experience with Oracle WebLogic Server Experience writing unit tests with Junit Experience with Java logging frameworks such as log4j2 Ability to work independently and as part of a team. Experience participating in an agile development team and knowledge of standard Agile/Scrum practices as well as other software development methodologies Experienced with Git version control Good understanding of Object-Oriented Principles Strong written and verbal communication skills. Desired Qualifications: Experience coding with AI Code Assistant such as Copilot Experience with Oracle Application Development Framework (ADF) is a plus Experience with Google Cloud (GCP) Experience with Jira Experience with GitLab, CI/CD, and automated pipelines Experience with OpenSAML Experience with Bootstrap Certification in a web application, Object Oriented programing language such as Java is preferred. GCP or Oracle Cloud Certification