Java Full Stack Developer Contractor

KAYGEN•Dallas, TX

7d•Hybrid

About The Position

KAYGEN is seeking an experienced Java Full Stack Developer 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. This is a contract position with a duration through 3/12/27, with a possible extension. The role requires onsite presence two days a week at any Deloitte office.

Requirements

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.

Nice To Haves

ReactJS experience is strongly preferred over other front-end frameworks

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