Haystack
← Back to Jobs
Technology
SI

Core Java Developer

Stellar IT SolutionsSt. Louis, MO🇺🇸United StatesPosted 17 Aug 2026

Quick Overview

Work Type
Hybrid
Level
Mid Senior

Job Description

Position: Core Java Developer

Location: Remote

Duration: 6+ Months Contract

Role Overview

We are seeking experienced Senior Core Java Developers to join our team and contribute to building secure, scalable, and productionready applications. The ideal candidate will have strong expertise in Java, microservices architecture, and containerization, with handson experience in developing REST APIs and implementing secure coding practices. This role requires deep technical proficiency in backend engineering, combined with the ability to collaborate across teams and deliver highquality solutions in enterprise environments.

Key Responsibilities

  • Design, develop, and maintain Core Java applications with a focus on scalability and performance.

  • Build and integrate microservices architectures using Spring Boot, Spring Security, and Spring Web MVC.

  • Develop and optimize REST APIs for secure and efficient communication between services.

  • Implement secure coding practices to remediate vulnerabilities and ensure compliance with enterprise standards.

  • Work with containerization platforms (Docker, Kubernetes, OpenShift) to deploy and manage applications.

  • Collaborate with crossfunctional teams including QA, DevOps, and product owners to deliver productionready solutions.

  • Conduct code reviews, troubleshoot issues, and provide technical guidance to junior developers.

  • Support CI/CD pipelines and ensure smooth deployment processes.


Required Skills

  • Strong expertise in Core Java development.

  • Handson experience with containerization (Docker, Kubernetes, OpenShift).

  • Proficiency in microservices architecture and REST API development.

  • Solid knowledge of Spring Boot, Spring Security, Spring Web MVC.

  • Experience with secure coding practices and vulnerability remediation.


Nice to Have

  • Experience with Harness for CI/CD orchestration.

  • Familiarity with Postman or other API testing tools.

  • Exposure to Red Hat OpenShift for enterprise container management.


Skills

Docker
Microservices
Spring
Spring Boot
Java
Kubernetes
Postman
REST

Similar jobs