Java Full Stack Developer Contractor

KAYGEN is an emerging leader in providing top talent for technology-based staffing services. We specialize in providing high-volume contingent staffing, direct hire staffing and project-based solutions to companies worldwide ranging from startups to Fortune 500 and Managed Service Providers (MSP) across a wide variety of industries. Title: Java Full Stack Developer Contractor Duration: Through 3/12/27, possible extension Location: Onsite 2 days a week at any Deloitte office Summary: Seeking an experienced Java Full Stack Developers with strong ReactJS expertise to design, build, and maintain enterprise-grade applications for the Edward Jones engagement. The ideal candidate will be proficient across the full stack - Java backend, React frontend, APIs, and cloud-native services. Key Responsibilities Design and develop full stack applications using Java and ReactJS Build and maintain RESTful APIs and microservices using Spring Boot and Spring JPA Develop responsive, accessible frontend components using React and modern JavaScript/TypeScript Integrate with messaging infrastructure - Kafka - and cloud services on Azure Work with relational databases (MS SQL) and apply sound data modelling practices Follow micro-service architecture patterns and API gateway standards Collaborate with tech leads, product owners, scrum masters, and QA engineers in an agile team Participate in code reviews and contribute to engineering best practices Support CI/CD pipeline integration and DevOps practices Skills & Experience Required 7+ years of software development experience Strong proficiency in Java, Spring, Spring Boot, Spring JPA, and REST APIs Strong experience with ReactJS and modern front-end development (HTML, CSS, JavaScript, TypeScript) Experience with RESTful API development, API gateways, and integration patterns Working knowledge of Kafka, Kubernetes, MuleSoft, and Azure cloud Experience with MS SQL and general knowledge of cloud best practices Familiarity with micro-service architecture Bachelor's degree in Computer Science, MIS, or related field preferred Financial Services background preferred. ReactJS experience is strongly preferred over other front-end frameworks Rate: $50 - 55/hour At KAYGEN, people are at the heart of everything we do. We foster a diverse, inclusive, and employee-driven culture where every individual is valued, empowered, and encouraged to bring their authentic self to work. Our candidate-first approach means we are committed to understanding your career goals and connecting you with opportunities that align with your aspirations, skills, and potential. Whether you're taking the next step in your career or searching for your dream opportunity, KAYGEN is more than a staffing partner-we're a community dedicated to helping you grow, succeed, and thrive. Join us and discover a place where your talent is recognized, your ambitions are supported, and your future is built alongside a team that invests in your success every step of the way. Our team of experienced staffing experts will work with you to find you the best opportunity. For more information, please visit us at Benefits : Free Healthcare Insurance 401(k) Retirement Plan Free Life Insurance Sick Time Off Achieve your Kaizen by clicking here. A unique and exclusive talent community supported by KAYGEN, that includes programs like: Mentorship Program Certifications Referrals Family and Wellness benefits Continuous Growth and Career Development Kaygen