Centurion · 20 hours ago
Senior Application Developer/Java
Washington, DC
Full-time
Onsite
Senior LevelCenturion Consulting Group is seeking a Senior Application Developer with Java experience to support the modernization of legacy systems. The role involves upgrading systems from Java/JDK 8 to Java/JDK 21 and requires expertise in various technologies to ensure a seamless transition.
ConsultingInformation TechnologyManagement Consulting
Responsibilities
Support up to 3 legacy mission-essential systems in the upgrade from Java/JDK 8 to Java/JDK 21 technology and beyond with operations and maintenance
Leverage knowledge of Object-Oriented Programming, software development methodologies, and the Java language to seamlessly transition our systems to the desired version
Ensure smooth and successful migration using expertise in technologies such as Servlet, JSP, Tag Library, JavaBean, and SQL Server database
Modernize the user interface and enhance the overall user experience using tools like Maven, JavaScript, jQuery, Knockout.js, HTML, and CSS
Be well-versed in Windows authentication, SSL, session management, and Single Sign-On (SSO) technologies
Integrate the upgraded systems with existing infrastructure using familiarity with Spring, Spring MVC, and ORM technologies like Hibernate and JPA
Value RESTful web services, JSON parsing, and multipart/form-data file management
Apply expertise in vulnerability remediation techniques such as CSRF, SQL injection, XSS, and reflection attacks
Manage build, deployment, and CI/CD processes with proficiency in build tools (Maven/Gradle) and experience updating build pipelines to accommodate newer Java versions
Handle dependency management skills and library compatibility challenges
Experience with continuous integration/continuous deployment (CI/CD) pipelines (Azure DevOps, GitLab)
Monitor application performance using application performance monitoring tools and techniques
Manage log management and analysis systems
Create and maintain runbooks for operational procedures
Identify and resolve production issues
Understand JVM tuning and garbage collection optimization
Implement and maintain automated health checks
Manage security patch management and vulnerability assessment
Utilize version control with Git
Familiarity with application servers (e.g., Tomcat, WebSphere, WildFly)
Understand common enterprise integrations (SQL Server databases, messaging systems)
Experience with containerization technologies (Docker, Kubernetes) is a plus
Demonstrate excellent written and verbal communication skills
Exhibit strong problem-solving abilities and attention to detail
Document migration processes, decisions, and technical debt
Work independently and self-motivated
Collaborate with existing development teams
Manage time effectively to deliver migration within schedule constraints
Provide on-call support and incident management
Qualification
Required
Java experience and a strong aptitude in modernizing systems
Support up to 3 legacy mission-essential systems in the upgrade from Java/JDK 8 to Java/JDK 21 technology and beyond
Leverage knowledge of Object-Oriented Programming, software development methodologies, and the Java language
Expertise in technologies such as Servlet, JSP, Tag Library, JavaBean, and SQL Server database
Proficiency in tools like Maven, JavaScript, jQuery, Knockout.js, HTML, and CSS
Well-versed in Windows authentication, SSL, session management, and Single Sign-On (SSO) technologies
Familiarity with Spring, Spring MVC, and ORM technologies like Hibernate and JPA
Familiarity with RESTful web services, JSON parsing, and multipart/form-data file management
Expertise in vulnerability remediation techniques such as CSRF, SQL injection, XSS, and reflection attacks
Upgrade experience
Previous experience successfully migrating Java applications across multiple major versions
Knowledge of common pitfalls and solutions when upgrading Java applications
Understanding of deprecated features and their modern replacements
Experience identifying and resolving compatibility issues
Proficiency with build tools (Maven/Gradle)
Experience updating build pipelines to accommodate newer Java versions
Dependency management skills and handling library compatibility challenges
Experience with continuous integration/continuous deployment (CI/CD) pipelines (Azure DevOps, GitLab)
Experience with application performance monitoring tools and techniques
Knowledge of log management and analysis systems
Ability to create and maintain runbooks for operational procedures
Proficiency in identifying and resolving production issues
Understanding of JVM tuning and garbage collection optimization
Experience implementing and maintaining automated health checks
Knowledge of security patch management and vulnerability assessment
Version control with Git
Familiarity with application servers (e.g., Tomcat, WebSphere, WildFly)
Knowledge of common enterprise integrations (SQL Server databases, messaging systems)
Excellent written and verbal communication skills
Strong problem-solving abilities and attention to detail
Ability to document migration processes, decisions, and technical debt
Self-motivated with the ability to work independently
Collaborative approach when working with existing development teams
Strong time management skills to deliver migration within schedule constraints
Experience providing on-call support and incident management
Preferred
Experience with containerization technologies (Docker, Kubernetes) is a plus
Company
Centurion
Centurion, a Woman-Owned Small Business headquartered in Herndon, VA, conveniently located near Washington D.C., is a national professional services firm working with the public and private sector by delivering relevant solutions for our client’s complex business and technology challenges.
Founded in 2016
51-200 employees
Funding
Current Stage
Growth StageLeadership Team
Theresa Zandi
Principal Owner
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