Core Java Backend Engineer – Spring Boot & Kafka (Hybrid)

Apex Systems; Charlotte, Northern (NC, KY); Hybrid; USD 73,000 - 79,000; Part time

Job summary

Apex Systems in Charlotte, NC is seeking a Software Engineer 3 with strong Core Java backend development. The role focuses on building Spring Boot microservices, Kafka integrations, and MongoDB data services while supporting modernization from JSF to React in a large enterprise legacy application.

Hybrid work arrangement with 3 onsite days, candidates should have 5–7 years of Core Java experience, plus React and cloud/Kubernetes exposure.

Qualifications

• 5–7 years of strong Core Java backend development experience.
• Spring Boot and microservices development.
• Kafka experience, including filters and event-processing concepts.
• React experience, preferably supporting Java-to-React modernization.
• Experience with MongoDB and strong technical communication skills.

Responsibilities

• Backend Development: Develop and maintain enterprise Java backend services; build and enhance Spring Boot microservices; troubleshoot complex issues; read and enhance legacy code.
• React Modernization: Support migration from Java Server Faces to React; collaborate with frontend engineers on APIs and integration.
• Kafka & Event Processing: Build and support Kafka-based integrations; configure message processing; investigate event-flow issues.
• Database & Cloud: Develop MongoDB-backed services; work with OpenShift/Kubernetes; support cloud deployment and troubleshooting.

Skills

Core Java

Spring Boot

Microservices

Kafka

React

MongoDB

Tools

Kubernetes

OpenShift

Job description

Apex Systems in Charlotte, NC is seeking a Software Engineer 3 with strong Core Java backend development. The role focuses on building Spring Boot microservices, Kafka integrations, and MongoDB data services while supporting modernization from JSF to React in a large enterprise legacy application.

Hybrid work arrangement with 3 onsite days, candidates should have 5–7 years of Core Java experience, plus React and cloud/Kubernetes exposure.