Full-Stack Java and React Developer

Full-Stack Java and React DeveloperBuild and modernize mission-critical web applications that connect secure Java services with responsive React interfaces. This role owns development across the stack, from REST APIs and relational data through front-end behavior, testing, and deployment.The best fit is a mid-to-senior full-stack engineer with 5-10 years of hands-on Java and React experience who can work in a structured, security-conscious environment and collaborate effectively with systems, UX, database, and DevSecOps partners.Location: Andover, MA or Tucson, AZSchedule: First shift, 40 hours per weekWork Setting: Hybrid - three days per week onsite at the selected officeRole Type: ContractContract Duration: Approximately 6 months, with potential to extend or convert based on performance, business need, funding, and client approvalOpenings: 1Citizenship: U.S. citizenship requiredClearance: Must be able to obtain a Secret clearance; work begins at the unclassified levelPay Rate: $64.00-$75.00 per hourResponsibilitiesDesign, build, test, and maintain full-stack applications using Java, Spring Boot, React, JavaScript, HTML5, and CSS3.Develop RESTful APIs and secure service integrations between front-end applications, backend services, identity platforms, and relational databases.Translate system and user requirements into maintainable application components, reusable interfaces, and reliable data flows.Partner with UI/UX designers, systems engineers, database administrators, cybersecurity personnel, and other developers throughout the delivery lifecycle.Participate in peer reviews, automated and integration testing, defect resolution, and CI/CD deployment activities.Troubleshoot application behavior across the stack and improve reliability, security, performance, and maintainability.Support modernization or migration of legacy applications into current web architectures while protecting required functionality and interfaces.Produce clear technical documentation and follow program-specific security, coding, configuration-management, and compliance standards.Qualifications5-10 years of professional full-stack software development experience.Strong production experience with Java and Spring Boot on the backend and React on the frontend.Demonstrated ability to design, implement, and troubleshoot RESTful APIs.Strong foundation in object-oriented design, secure web development, JavaScript, HTML5, and CSS3.Experience with at least one relational database such as PostgreSQL, Oracle, or MySQL.Working experience with Git, automated build and deployment pipelines, code review, and Agile delivery practices.U.S. citizenship and the ability to obtain a Secret security clearance.Ability to work onsite three days per week in Andover, Massachusetts or Tucson, Arizona.BenefitsEligible full-time CRG contract employees working at least 30 hours per week may enroll in CRG benefits. Coverage begins on the first day of the month following 30 days after hire.Three Aetna medical plan options, including an HSA-compatible option; in-network preventive care is covered in fullVoluntary dental and vision coverage$25,000 in company-paid basic life and AD&D coverage for employees enrolled in a CRG medical planVoluntary life and AD&D, short-term disability, long-term disability, and accident coverageEmployee-assistance resources and benefit-advocacy supportWeekly pay and direct depositReferral bonus opportunitiesSupport from the CRG recruiting and account management team throughout the assignment401(k) eligibility after 12 months as a CRG employeeOfficial CRG plan documents and carrier materials control eligibility, coverage, exclusions, limits, waiting periods, payroll deductions, and employee costs.Employees whose primary work location is Massachusetts or Arizona accrue paid sick time at one hour for every 30 hours worked, up to 40 hours, or five eight-hour days, per year, subject to applicable law and CRG policy.