Job Description
Title: Full Stack Developer (Java & React)
Location: Trenton, NJ (Hybrid)
Duration: 9+ Months
Hybrid for 3 days onsite and 2 days remote
Position Overview
Senior Full-Stack Developer (Java & React) with 10+years of experience building scalable web applications and modernizing legacy systems. Specialized in transitioning monolithic applications into modular microservices using Java and Spring Boot, alongside intuitive user interfaces with React, JavaScript, and Bootstrap. Strong background in REST APIs, relational database optimization (Oracle), CI/CD pipelines, and converting core business requirements into reliable technical solutions.
Key Responsibilities
Key Responsibilities
Required Skills:
Location: Trenton, NJ (Hybrid)
Duration: 9+ Months
Hybrid for 3 days onsite and 2 days remote
Position Overview
Senior Full-Stack Developer (Java & React) with 10+years of experience building scalable web applications and modernizing legacy systems. Specialized in transitioning monolithic applications into modular microservices using Java and Spring Boot, alongside intuitive user interfaces with React, JavaScript, and Bootstrap. Strong background in REST APIs, relational database optimization (Oracle), CI/CD pipelines, and converting core business requirements into reliable technical solutions.
Key Responsibilities
- Senior Full-Stack Developer responsible for the hands-on development, refactoring, and full-lifecycle support of enterprise web applications. This role balances day-to- feature development with system modernization decoupling legacy architectures into clean, modular, cloud-ready services.
- The developer works across the full software stack to deliver performant solutions, optimize existing database structures, and enforce engineering best practices through automated testing and clean CI/CD deployment workflows.
Key Responsibilities
- Application Modernization & Development: Refactor legacy Java applications into modular Spring Boot microservices while building responsive front-end components using React and Bootstrap.
- API & Database Engineering: Design secure RESTful APIs and execute database schema changes and performance tuning within relational databases (Oracle preferred).
- Requirements & Design: Convert complex business needs into clean, maintainable technical implementations while following departmental standards.
- Testing & Quality Control: Execute thorough developer-level testing using JUnit, Mockito, and React Testing Library to maintain system reliability.
- Deployment & Ongoing Maintenance: Manage application builds, deploy software through CI/CD pipelines, and provide post-launch operational support.
- Bachelors in Computer Science or related field required.
- LinkedIn Profile required.
Required Skills:
- Java (Core & Modern)
- System Refactoring / Monolith Modernization
- Spring Framework (Spring Boot, Spring MVC, Hibernate)
- Relational Databases & Data Analysis
- Oracle Database Management & SQL Optimization
- JavaScript & React
- CSS & Bootstrap
- RESTful API Development
- Developer Testing (JUnit, Mockito, React Testing Library)
- Software Deployment & CI/CD Tooling
Numbers & Facts
| Location | Trenton, NJ (Remote) |
| Industry | Computer/IT Services |
| Company Size | 20 to 49 employees |
| Year Founded | 2002 |
| Website | http://crescensinc.com/ |
About Company
Crescens Inc. is an industry leader in providing IT staffing services and tailored workforce solutions to meet the demanding expectations and distinctive needs of clients across the United States and Canada. We have grown tremendously in the past years and have been applauded by our clients for the quality of workforce and the quick turnaround time. We have evolved from good service to great service and all management plans are geared towards quality.
Our vision is to be the best in Talent Acquisition and strive for excellence consistently by focusing on four performance dimensions; Quality, Efficiency, Cost and Risk. A satisfied client and candidate are the backbone to our continued success. Headquartered in New Jersey, we are a team with unique expertise to deliver exceptional results to our clients by setting benchmarks and establishing best practices.
Skills
- Application Programming Interface (API)unmatched
- Best Practicesunmatched
- Bootstrapunmatched
- CSS (Cascading Style Sheet)unmatched
- Clean Technologiesunmatched
- Cloud Computingunmatched
- Computer Scienceunmatched
- Continuous Deployment/Deliveryunmatched
- Continuous Integrationunmatched
- Data Analysisunmatched
- Database Administrationunmatched
- Database Designunmatched
- Database Optimizationunmatched
- Database Programmingunmatched
- Database Technologyunmatched
- Hibernateunmatched
- Internet Applicationunmatched
- JUnitunmatched
- Javaunmatched
- Machine Toolunmatched
- Microservicesunmatched
- Operational Supportunmatched
- Oracleunmatched
- Oracle Databaseunmatched
- Performance Tuning/Optimizationunmatched
- Quality Controlunmatched
- REST (Representational State Transfer)unmatched
- React.jsunmatched
- Refactoringunmatched
- Relational Databases (RDBMS)unmatched
- SQL (Structured Query Language)unmatched
- Scalable System Developmentunmatched
- Software Administrationunmatched
- Software Developmentunmatched
- Software Engineeringunmatched
- Spring Frameworkunmatched
- Spring MVCunmatched
- Systems Maintenanceunmatched
- Systems Reliabilityunmatched
- Test Automationunmatched
- Test Plan/Scheduleunmatched
- Testingunmatched
- User Interface/Experience (UI/UX)unmatched
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