Mid-Level Java Web Developer

About Concept Plus

Concept Plus is a mission-focused technology solutions provider that transforms IT concepts into impactful solutions for federal agencies. Headquartered in Fairfax, VA, we bring the agility, responsiveness, and customer intimacy of a small business combined with the quality and infrastructure of a larger firm.

Recognized as an award-winning Oracle partner, we have delivered innovative solutions across Defense, Intelligence, Civilian, Health IT, and Tribal sectors. Our highly certified experts build systems that drive efficiency, accelerate modernization, and ensure mission outcomes with certainty.

We offer competitive pay, comprehensive health, dental, and vision insurance, paid life insurance, paid time off, 11 paid holidays, performance bonuses, tuition reimbursement, unlimited training, and the opportunity to thrive in a collaborative, flexible, and innovative environment.

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About the role

Concept Plus is seeking a skilled Mid-Level Java Developer to design, develop, and maintain a robust and secure Java-based web application using Spring Boot, Hibernate, Thymeleaf, and Tapestry. This role requires expertise in object-oriented programming and building RESTful APIs, while contributing to all phases of the development lifecycle in an agile environment. If you are a collaborative team player with a passion for clean code and innovative solutions, we encourage you to apply and contribute to our dynamic engineering team.

What you'll do

• Develop Java Web Applications using:
• • SpringBoot
• Hibernate
• Thymeleaf
• Utilize object-oriented programming and RESTful APIs, to contribute to all phases of the development lifecycle.
• Design, develop and maintain Java Web Applications
• Assist in sustaining a Web/Oracle system architecture in AWS.

Qualifications

• US Citizen
• Bachelor's degree in Computer Science or a related field preferred, or equivalent experience.
• 5+ years of experience in Java web application development.
• Experience with using SpringBoot for web applications and RESTful APIs (design and development).
• Familiarity with Spring Security and its use in securing web applications.
• Experience with using Hibernate for object-relational mapping.
• Experience with using Apache Tapestry and/or Thymeleaf for web templating.
• Experience with using Maven for building and dependency management.
• Experience with developing unit tests with Junit and Mockito
• Strong understanding of object-oriented programming principles, design patterns and best practices.
• Experience with relational databases (e.g., Oracle, MySQL, PostgreSQL, SQL Server).
• Experience with using Git for source control (Bitbucket, Gitlab, GitHub).
• Excellent problem-solving and communication skills.
• Ability to work independently and as part of a team.
• Ability to convey complex technical concepts to non-technical stakeholders
• Prior DoD development experience, including implementing DoD Security Technical Implementation Guides (STIGs) and adhering to applicable NIST standards, preferred.
• Experience integrating SpringBoot application with Okta or other Identity Provider using OIDC /SAML
• Experience using static code analysis tools (e.g., Checkmarx, SonarQube, Fortify) to identify and remediate security vulnerabilities preferred.
• Preferred experience developing JavaScript-based Single Page Applications (SPAs) using one or more of the following frameworks/libraries:
• • React (with or without Redux/Context)
• Angular (Angular 2+ preferred)
• Experience with AWS cloud platforms, including services such as EC2, S3, RDS, Lambda, ECS/EKS, CloudFormation, and CloudWatch for deploying and managing Java web applications preferred.
• Experience with containerization technologies (e.g., Docker, Kubernetes) preferred.
• Experience with CI/CD pipelines and related tools (e.g., Jenkins, GitLab, Ansible, Terraform, etc) preferred.
• Experience with developing automated testing using Selenium or Playwright preferred.
• Experience working with Agile methodologies, Scrum, and Jira preferred.
• Security+ Certification or IAT Level II preferred.

Concept Plus is an Affirmative Action/Equal Opportunity Employer. As such, we will give your application full consideration without regard to your race, color, religion, sex, age, national origin, disability, veteran status, sexual orientation, gender identity, or any other classification protected by federal, state, or local law.