Java Developer Contractor – Denver, CO; Hybrid

Position: Java Developer Contractor – Denver, CO (Hybrid)
Location: Denver

Hiring:
Java Developer Contractor – Denver, CO (Hybrid)

Location:

Denver, CO (In‑person Tuesdays, remote rest of week) Duration: 07/27/2026 – 07/27/2027 Client:
State of CO We’re seeking an experienced Java Developer Contractor to design, build, and maintain modern web applications, backend services, and cloud‑based solutions. This role requires strong hands‑on skills in Java 21, Spring Boot, REST APIs, AWS services, and Git Lab CI/CD pipelines. Key

Skills:

Java SDK 21, Spring Boot, REST APIs AWS (ECS, API Gateway, Dynamo

DB) Git Lab repositories & CI/CD pipelines Terraform, Intelli

J IDEA HTML, CSS, JavaScript, Thymeleaf 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 Dynamo

DB. Contribute to source control and development workflows using Git Lab. Build, maintain, and troubleshoot Git Lab 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 Intelli

J 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 Git Lab. Experience working with CI/CD pipelines, preferably Git Lab 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 Dynamo

DB Familiarity with Terraform or other infrastructure-as-code tools. Experience using Intelli

J IDEA in a professional development environment. Familiarity with AI-assisted development tools such as Claude Code, Git Hub 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 Dynamo

DB Git Lab repositories Git Lab CI/CD pipelines Terraform Intelli

J IDEA AI-assisted coding tools, including exploration of Claude Code If you’re a Java developer comfortable across backend, front‑end, and cloud deployments, let’s connect! #Java Developer #Spring Boot #AWS #Denver Jobs #Hiring #Contract Role