Java/AWS developer (Hybrid - One day onsite on Tuesdays)

Cleo Consulting

  • Denver, CO
  • 2 days ago
  • $56–$70

Highlights

Client: State of CO/CO Judicial Job ID: Java Senior Engineer Job Title: Java Developer Location: 1300 Broadway, Suite 1100 Denver, Colorado 80203 Estimated Duration: 12/01/2026 - 06/30/2027 Hybrid Candidate Must Be Local, Hybrid, 1 day On-site on Tuesdays. This role is ideal for someone who is comfortable working across the Java/Spring ecosystem, building REST APIs, integrating with AWS services, and contributing to modern CI/CD-driven development workflows.

Numbers & Facts

LocationDenver, CO
Salary$56–$70

Description

Client: State of CO/CO Judicial
Job ID: Java Senior Engineer
Job Title: Java Developer
Location: 1300 Broadway, Suite 1100 Denver, Colorado 80203
Estimated Duration: 12/01/2026 - 06/30/2027
Hybrid
Candidate Must Be Local, Hybrid, 1 day On-site on Tuesdays. Remote work rest of days.

Description

  • Java Developer Contractor

About the Role

  • We are seeking an experienced Java Developer Contractor to support the design, development, and maintenance of web applications, backend services, and cloud-based solutions. This role is ideal for someone who is comfortable working across the Java/Spring ecosystem, building REST APIs, integrating with AWS services, and contributing to modern CI/CD-driven development workflows.
  • The right candidate will be hands-on, pragmatic, and comfortable working independently while collaborating with technical and business stakeholders.

Responsibilities

  • Design, develop, test, and maintain Java-based applications using Java SDK 21.
  • Build and enhance applications using Spring Boot and the broader Spring Framework.
  • Develop and maintain REST APIs and JSON-based integrations.
  • Support smaller web applications using Thymeleaf, HTML, CSS, and JavaScript.
  • Work with AWS-based infrastructure and services, including ECS, API Gateway, and DynamoDB.
  • Contribute to source control and development workflows using GitLab.
  • Build, maintain, and troubleshoot GitLab CI/CD pipelines.
  • Collaborate with team members on application architecture, implementation decisions, code reviews, and deployment practices.
  • Support infrastructure-as-code efforts, especially where Terraform is used.
  • Use IntelliJ IDEA as the primary development environment.
  • Apply sound software engineering practices, including maintainable code design, testing, documentation, and operational awareness.
  • Where appropriate, leverage AI-assisted coding tools to improve development productivity and code quality.

Required Qualifications

  • Strong professional experience developing applications with Java.
  • Experience with Java 21 or recent versions of the Java SDK.
  • Solid experience with Spring Boot and Spring-based application development.
  • Experience designing, building, and consuming REST APIs.
  • Strong working knowledge of JSON and API integration patterns.
  • Familiarity with front-end technologies including HTML, CSS, and JavaScript.
  • Experience using Git-based source control, preferably GitLab.
  • Experience working with CI/CD pipelines, preferably GitLab CI/CD.
  • Practical experience developing, deploying, or supporting applications in AWS.
  • Ability to work independently, communicate clearly, and deliver high-quality work in a contractor capacity.

Preferred Qualifications

  • Experience with Thymeleaf for server-side templating.
  • Hands-on experience with AWS services such as:
  • Amazon ECS
  • Amazon API Gateway
  • Amazon DynamoDB
  • Familiarity with Terraform or other infrastructure-as-code tools.
  • Experience using IntelliJ IDEA in a professional development environment.
  • Familiarity with AI-assisted development tools such as Claude Code, GitHub Copilot, Cursor, or similar tools.
  • Experience troubleshooting cloud deployments, application logs, build pipelines, and environment-related issues.
  • Understanding of secure coding practices and cloud application security concepts.

Technical Environment

  • Our current technology stack includes:
  • Java SDK 21
  • Spring Boot / Spring Framework
  • Thymeleaf
  • REST APIs
  • JSON
  • HTML / CSS / JavaScript
  • AWS, including ECS, API Gateway, and DynamoDB
  • GitLab repositories
  • GitLab CI/CD pipelines
  • Terraform
  • IntelliJ IDEA
  • AI-assisted coding tools, including exploration of Claude Code

Ideal Candidate

  • The ideal candidate is a strong Java developer who can move comfortably between backend development, lightweight front-end work, cloud-based deployments, and CI/CD workflows. They should be able to understand existing systems quickly, contribute clean and maintainable code, and work effectively in a modern cloud-oriented development environment.
  • Experience with AWS, GitLab pipelines, Terraform, and AI-assisted coding tools is highly valued.

Engagement Type

  • This is a contractor position. The contractor will work with our development team to deliver application enhancements, new features, integrations, and platform improvements.

Schedule

  • Days - Monday Yes Tuesday Yes Wednesday Yes Thursday Yes Friday Yes Saturday No Sunday No
  • Hours/Day - 8
  • Time Zone - MST
  • Shifts - Shift 1
  • Start Time - 8:00 AM
  • End Time - 5:00 PM
  • Active - Yes

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