Full-stack Developer (Java)

Application Developer (Full Stack) Location: Parsippany, NJ or Pasadena, CA (hybrid) Rates: $65.00-$80.00 W2 // $75.00 - $95.00 C2C About the Role ADP Technology Services is hiring Application Developers to design, build, and deliver high-quality full-stack software solutions that support ADP's Human Capital Management (HCM) platforms - including Time management / timekeeping products (eTime, Workforce Manager, and related Time as a Service capabilities). You will work across the entire technology stack, collaborating with product managers, UX designers, architects, and other engineers to create scalable, reliable, and user-friendly applications that help clients manage employee time, attendance, scheduling, and related workforce processes. Key Responsibilities Participate in all phases of the Software Development Life Cycle (SDLC), including planning, design, construction, testing, reviews, demonstrations, and deployment. Take ownership of user stories and drive them to completion for both external-facing and internal applications. Design, develop, and enhance full-stack solutions using Java/Spring Boot on the backend and modern JavaScript frameworks (React, Angular, or similar) on the frontend. Build and maintain RESTful APIs, microservices, and integrations; ensure seamless interaction between client-side and server-side systems. Write clean, testable, scalable, and efficient code; perform unit, integration, and end-to-end testing. Create and review system, software, and functional design specifications. Collaborate with UX designers on wireframes and user experiences, particularly for ADP's Time management products. Package, configure, and deploy software using CI/CD pipelines (Jenkins, etc.). Investigate and resolve application issues; perform code reviews, refactoring, and performance optimization. Partner with cross-functional teams and stakeholders; provide mentoring and knowledge sharing when appropriate. Continuously explore new technologies and best practices to improve solutions. Required Qualifications Bachelor's degree in Computer Science, Computer Engineering, Information Systems, or a related field plus five (5) years of related experience or Master's degree plus two (2) years of related experience. Master's degree plus two (2) years of related experience. Hands-on full-stack experience that typically includes (exact combinations vary by posting): Backend: Java, Spring Boot / Spring Framework, J2EE, Hibernate/JPA, RESTful and SOAP web services (JSON/XML), SQL (Oracle, PostgreSQL, or similar), microservices architecture. Frontend: React, Angular, JavaScript/TypeScript, HTML/CSS, Node.js, Web Components. Additional: Unit and integration testing (JUnit, Jest, Postman, etc.), Git/Bitbucket, CI/CD (Jenkins), Docker/Kubernetes, AWS services (Lambda, SNS, SQS, RDS, etc.), design patterns, Agile/Scrum methodologies. Preferred Qualifications Experience developing or supporting time & attendance, workforce management, or HCM applications. Familiarity with GraphQL, Kafka, or additional cloud-native tools. Strong problem-solving skills, attention to detail, and the ability to work independently while collaborating effectively in a team environment.