Decca Consulting LLC

Sep 21, 2026

Java Senior Engineer

United States

Denver, Colorado, United States

JavaScriptJavaAWSTerraform

About the Role

Java Developer Contractor

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.

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.

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

Flexible work from home options available.

Languages

Java Senior Engineer

About the Role

Ideal Candidate

Responsibilities

Required Qualifications

Preferred Qualifications

Technical Environment

Show your skills.Get discovered.

More opportunities with one profile

Keep exploring

Senior Staff Technical Program Manager, New Product Programs

Deputy Program Manager — Federal Health IT Operations

Cloud, Deployment & DevSecOps Engineer