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Java Developer/Java Senior Engineer

Nextica Solutions IncDenver, CO🇺🇸United StatesPosted Sep 25, 2026

Quick Overview

Seniority
Mid Senior
Work mode
Hybrid
Location
Denver, CO, United States
Posted
Yesterday
DynamoDBSpringSpring BootAPI GatewayAWSCSSGitGitLab CIHTMLJavaRESTTerraform

Job Description

Job Title: Java Senior Engineer    
Location: Denver, CO – Hybrid  
Duration: 12+ Months
Position Overview
The Client is seeking an experienced Java Developer Contractor to support the design, development, testing, and maintenance of web applications, backend services, REST APIs, and cloud-based solutions.
The ideal candidate will have strong experience with Java, Java 21, Spring Boot, REST APIs, AWS, GitLab CI/CD, and modern software development practices. Experience with Terraform, Thymeleaf, and AI-assisted development tools is highly valued.
Key Responsibilities
  • Design, develop, test, and maintain Java-based applications using Java SDK 21.
  • Develop applications using Spring Boot and the broader Spring Framework.
  • Build and maintain REST APIs and JSON-based integrations.
  • Support web applications using Thymeleaf, HTML, CSS, and JavaScript.
  • Work with AWS infrastructure and services, including:
    • Amazon ECS
    • API Gateway
    • DynamoDB
  • Use GitLab for source control and development workflows.
  • Build, maintain, and troubleshoot GitLab CI/CD pipelines.
  • Collaborate on application architecture, implementation decisions, code reviews, and deployment practices.
  • Contribute to infrastructure-as-code initiatives using Terraform where applicable.
  • Use IntelliJ IDEA as the primary development environment.
  • Follow software engineering best practices for coding, testing, documentation, and operational support.
  • Leverage AI-assisted coding tools where appropriate to improve development productivity and code quality.
Required Qualifications
  • Strong professional experience developing applications using Java.
  • Experience with Java 21 or recent Java SDK versions.
  • Strong experience with Spring Boot and Spring Framework.
  • Experience designing, developing, and consuming REST APIs.
  • Strong knowledge of JSON and API integration patterns.
  • Familiarity with HTML, CSS, and JavaScript.
  • Experience with Git-based source control, preferably GitLab.
  • Experience with CI/CD pipelines, preferably GitLab CI/CD.
  • Practical experience developing, deploying, or supporting applications in AWS.
  • Ability to work independently and communicate effectively with technical and business stakeholders.
Preferred Qualifications
  • Experience with Thymeleaf.
  • Hands-on experience with:
    • Amazon ECS
    • Amazon API Gateway
    • Amazon DynamoDB
  • Experience with Terraform or other infrastructure-as-code tools.
  • Professional experience with IntelliJ IDEA.
  • Familiarity with AI-assisted development tools such as:
    • Claude Code
    • GitHub Copilot
    • Cursor
    • Similar AI coding tools
  • Experience troubleshooting cloud deployments, application logs, build pipelines, and environment issues.
  • Understanding of secure coding and cloud application security concepts.
Technical Environment
  • Java SDK 21
  • Spring Boot / Spring Framework
  • Thymeleaf
  • REST APIs
  • JSON
  • HTML / CSS / JavaScript
  • AWS
  • Amazon ECS
  • API Gateway
  • DynamoDB
  • GitLab
  • GitLab CI/CD
  • Terraform
  • IntelliJ IDEA
  • AI-assisted development tools

Warm Regards,

Belinda Clark | Recruitment Specialist 
Mobile:
Email:  
7950 Legacy Dr Suite 400, Plano, TX 75024

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