Demo

Senior Full-Stack Developer (Java & React)

hackajob
Trenton, NJ Contractor
POSTED ON 7/30/2026
AVAILABLE BEFORE 8/28/2026
hackajob is collaborating with CAI to connect them with exceptional professionals for this role.

Senior Full-Stack Developer (Java & React)

Req Number

R8203

Employment Type

Full time

Worksite Flexibility

Hybrid

Who We Are

CAI is a global services firm with over 9,000 associates worldwide and a yearly revenue of $1.3 billion . We have over 40 years of excellence in uniting talent and technology to power the possible for our clients, colleagues, and communities. As a privately held company, we have the freedom and focus to do what is right—whatever it takes. Our tailor-made solutions create lasting results across the public and commercial sectors, and we are trailblazers in bringing neurodiversity to the enterprise.

Job Summary

We are looking for a motivated Senior Full-Stack Developer (Java & React) ready to take us to the next level! If you have 10 years developing in Java and React, designing secure APIs and database schema changes, and are looking for your next career move, apply now.

Job Description

We are looking for a Senior Full-Stack Developer (Java & React) to design, develop, modernize, and support enterprise web applications for our client. This position will be a full-time contract and hybrid, requiring candidates to work onsite in the Trenton, NJ office three days per week.

What You'll Do

  • Refactor and modernize legacy Java-based applications into scalable, maintainable Spring Boot microservices
  • Design, develop, and maintain responsive user interfaces using React, JavaScript, CSS, and Bootstrap
  • Develop and consume secure RESTful APIs to support enterprise application integrations
  • Analyze business requirements and translate them into technical solutions that align with standards and best practices
  • Design, optimize, and maintain relational database structures, with a strong focus on Oracle database performance and SQL optimization
  • Perform unit, integration, and component testing using JUnit, Mockito, and React Testing Library
  • Troubleshoot application issues and provide production support for enterprise systems
  • Implement software builds, deployments, and release management through CI/CD pipelines
  • Collaborate with business stakeholders, analysts, architects, and development teams throughout the software development lifecycle
  • Enforce coding standards, development best practices, and application security requirements
  • Support application enhancements, bug fixes, and ongoing modernization initiatives
  • Participate in code reviews, technical design discussions, and knowledge-sharing activities

Required

What You'll Need

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

Preferred

  • 7 years of Oracle Database management and SQL performance optimization
  • Experience with application modernization and cloud-ready architecture design
  • Experience implementing microservices-based architectures
  • Experience supporting public sector or education-related enterprise applications
  • Strong analytical, troubleshooting, and problem-solving skills
  • Experience working in Agile/Scrum development environments

Physical Demands

  • Ability to safely and successfully perform the essential job functions consistent with the ADA and other federal, state, and local standards
  • Sedentary work that involves sitting or remaining stationary most of the time with occasional need to move around the office to attend meetings and collaborate with team members
  • Ability to conduct repetitive tasks on a computer, utilizing a mouse, keyboard, and monitor

Reasonable accommodation statement

If you require a reasonable accommodation in completing this application, interviewing, completing any pre-employment testing, or otherwise participating in the employment selection process, please direct your inquiries to application.accommodations@cai.io or (888) 824 – 8111.

EEO Statement

It is the policy of Computer Aid, Inc.(CAI) not to discriminate against any employee or applicant for employment because of race, color, religion, sex, sexual orientation, gender identity, national origin, age, marital status, genetic information, disability or because he or she is a protected veteran. It is also the policy of CAI to take affirmative action to employ and to advance in employment, all persons regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, age, marital status, genetic information, disability or protected veteran status, and to base all employment decisions only on valid job requirements. This policy shall apply to all employment actions, including but not limited to recruitment, hiring, upgrading, promotion, transfer, demotion, layoff, recall, termination, rates of pay or other forms of compensation and selection for training, including apprenticeship, at all levels of employment.

Employees and applicants of CAI will not be subject to harassment on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, marital status, genetic information, disability or because he or she is a protected veteran. Additionally, retaliation, including intimidation, threats, or coercion, because an employee or applicant has objected to discrimination, engaged or may engage in filing a complaint, assisted in a review, investigation, or hearing or have otherwise sought to obtain their legal rights under any Federal, State, or local EEO law is prohibited.

$55 - $62 per hour

The pay range for this position is listed above. Exact compensation may vary based on several factors, including location, experience, and education. Benefit packages include medical, dental, and vision insurance, as well as 401k retirement account access. Employees in this role may also be entitled to paid sick leave and/or other paid time off as provided by applicable law.

Salary : $55 - $62

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