Senior Full-Stack Developer (Java & React)

CAI is seeking an experienced Senior Full-Stack Developer to join its Trenton, New Jersey team on a hybrid, contract basis. This role centers on shaping, building, modernizing, and supporting enterprise web applications with Java and React, with on-site collaboration required three days per week. The position offers an hourly rate in the mid to upper range and calls for a strong background in large-scale software delivery.

Role overview

Senior Full-Stack Developer (Java and React) responsible for transforming legacy Java applications into scalable Spring Boot microservices, delivering responsive interfaces, and ensuring robust API integrations within enterprise environments.

Responsibilities

• Refactor legacy Java applications into scalable Spring Boot microservices for maintainability and growth
• Build and maintain responsive UIs using React, JavaScript, CSS, and Bootstrap
• Develop and consume secure RESTful APIs to support enterprise integrations
• Interpret business requirements and translate them into standards-aligned technical solutions
• Design and optimize relational database structures with emphasis on Oracle performance and SQL tuning
• Conduct unit, integration, and component testing with JUnit, Mockito, and React Testing Library
• Troubleshoot production issues and provide ongoing support for enterprise systems
• Implement builds, deployments, and release management via CI/CD pipelines
• Collaborate with stakeholders, analysts, architects, and development teams across the SDLC
• Enforce coding standards, secure development practices, and application security requirements
• Support enhancements, bug fixes, and modernization initiatives
• Engage in code reviews, technical design discussions, and knowledge sharing

Requirements

• Bachelor’s degree in Computer Science, Information Technology, or a related field
• LinkedIn profile is required
• 10+ years of Java development (Core Java and modern frameworks)
• 7+ years of experience with system refactoring and monolithic modernization
• 7+ years with Spring technologies including Spring Boot, Spring MVC, and Hibernate
• 7+ years working with relational databases and data analysis
• 5+ years building applications with JavaScript and React
• 5+ years of CSS and Bootstrap experience
• 5+ years designing and developing RESTful APIs
• 5+ years of developer-level testing using JUnit, Mockito, and React Testing Library
• 5+ years involved with software deployment processes and CI/CD tooling
• Strong understanding of SDLC methodologies
• Experience supporting enterprise web applications through the full lifecycle
• Ability to work effectively in a hybrid team environment

Technologies

• Java
• React
• Spring Boot
• Spring MVC
• Hibernate
• Oracle database
• SQL
• JUnit
• Mockito
• React Testing Library
• Bootstrap
• CSS
• JavaScript

Benefits

• Medical, dental, and vision insurance
• 401k retirement account access
• Paid sick leave
• Paid time off

Physical Demands

• Ability to safely perform essential job functions in line with ADA and applicable laws
• Mostly sedentary work with occasional movement to attend meetings and collaborate
• Capability to perform repetitive computer tasks using a mouse, keyboard, and monitor

Preferred qualifications

• 7+ years of Oracle database management and SQL performance optimization
• Experience with application modernization and cloud-ready architecture
• Background implementing microservices architectures
• Experience supporting public sector or education enterprise apps
• Strong analytical, troubleshooting, and problem-solving skills
• Experience in Agile/Scrum environments

Reasonable accommodations

If you require a reasonable accommodation to complete this application, participate in interviews, or take pre-employment assessments, please contact [email protected] or call 888-824-8111.

Equal employment opportunity

CAI does not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, marital status, genetic information, disability, or veteran status. CAI affirms its commitment to equal opportunity to hire and advance in employment for all individuals.