Senior Java Developer

Senior Java Developer Job at a Glance Title: Senior Java Developer Location: Hybrid, Orlando FL (4 days onsite) Contract: W2 only, 12 month contract with potential for extension or conversion to full time with either the client or CEI Pay: $75.00-80.00 /hour + optional medical, dental, vision, 401(k) match Overview The client is seeking a Senior Java Developer responsible for enhancing and supporting Java-based backend systems with a focus on Spring Reactor, Spring WebFlux, reactive programming, and cloud-hosted services. This role will help support and evolve service-layer applications, troubleshoot sustainment issues, and contribute to reactive Java development using Java 17, WebFlux, Reactor, MongoDB, and AWS/cloud technologies. Key Responsibilities Design, develop, and maintain backend services using Java 17, Spring Boot, Spring WebFlux, and Spring Reactor. Build and support reactive REST APIs using Project Reactor, Mono, Flux, and WebFlux. Analyze sustainment issues quickly and provide practical technical solutions. Support and enhance service-layer applications in a cloud-hosted environment. Work with MongoDB and understand considerations around reactive data access and blocking database behavior. Collaborate with engineering teammates to support ongoing development, troubleshooting, and knowledge transfer. Promote best practices in code quality, CI/CD, testing, and production support. Conduct code reviews and contribute to maintainable, reliable backend services. Stay current on Java, Spring Reactor, WebFlux, and cloud-native development practices. Required Skills 5+ years of professional Java development experience. Strong Java 17 experience. Strong Spring Boot experience. Hands-on experience with Spring WebFlux and Spring Reactor. Experience building or supporting reactive applications using Mono and Flux. Strong understanding of RESTful API development and integration. Ability to explain a real WebFlux application and the candidate’s personal role in building or supporting it. Experience troubleshooting backend service issues and quickly identifying practical fixes. Familiarity with MongoDB or other database technologies. Familiarity with AWS or cloud-hosted application environments. Familiarity with modern DevOps and version control tools such as Git, Jenkins, Docker, or similar. Required Education Bachelor's degree in Computer Science or related field. Master's degree preferred. Preferred Skills Experience using MongoDB with reactive Java applications. Experience with Java 17 to Java 21 migration. Experience with AWS services or cloud-hosted deployments. Experience with hospitality, travel, commerce, or adjacent customer-facing business domains. Experience with Kubernetes or containerized application environments. Knowledge of microservices architecture and event-driven systems. Familiarity with NestJS or willingness to support JavaScript/NestJS-adjacent service work. AWS Certification is a plus. Why Should I Apply? This opportunity offers the chance to work on modern Java service-layer applications using Java 17, Spring WebFlux, Spring Reactor, MongoDB, and cloud-hosted technologies. You’ll join a collaborative engineering environment where hands-on problem solving, sustainment support, and reactive Java expertise are highly valued. About CEI As a trusted technology partner, CEI delivers solutions that help our customers transform their business and achieve meaningful results. From strategy and custom application development through application management - our technology and digital experience services are tailored to meet each unique need of our customers. Our staffing solutions bring specialized skills to complement our customers' workforce and project requirements. #INDGEN #ZR