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Freelance Java Developer Government Jobs in Chicago, IL

CDW

Senior Platform, DevOps Engineer

Vernon Hills, IL

$126.60K - $162.70K/yr

Proficiency in Python, including PySpark, and SQL; experience with Scala or Java is a plus ... About Us CDW is a Fortune 500 technology solutions provider that helps businesses, government ...

USM

Urgent Need Hadoop SME

Chicago, IL · On-site

... Engineering, Business Intelligence, Data Management, SOA, BPM, Data Warehousing, SharePoint ... We are a project-driven firm that reliably meets the IT needs of our State and Government customers ...

Deloitte

Agentic Software Engineer II

Arlington Heights, IL · On-site

$97.50K - $133.50K/yr

Serving federal, state, & local government clients as well as public higher education institutions ... JavaScript, Java, or another programming language * 1+ years of experience using AI-assisted ...

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How much do freelance java developer government jobs pay per hour?

As of May 30, 2026, the average hourly pay for freelance java developer government in Chicago, IL is $58.41, according to ZipRecruiter salary data. Most workers in this role earn between $50.53 and $65.38 per hour, depending on experience, location, and employer.

What is the difference between Freelance Java Developer Government vs Freelance Java Developer Private Sector?

AspectFreelance Java Developer GovernmentFreelance Java Developer Private Sector
CredentialsTypically requires security clearances and government-specific certificationsGenerally requires standard Java certifications and portfolio
Work EnvironmentGovernment agencies, often in secure or regulated settingsPrivate companies, startups, or consulting firms
Employer & Industry UsagePublic sector projects, government contractsCommercial projects, private sector clients
Search & Comparison IntentSeeking government-specific freelance Java rolesLooking for private sector freelance Java opportunities

Freelance Java Developers working with government agencies often need security clearances and government-specific certifications, working in secure environments on public sector projects. In contrast, private sector freelance Java developers typically focus on commercial projects, requiring standard Java skills and certifications. The choice depends on your credentials, work environment preferences, and the type of projects you aim to pursue.

What are the most commonly searched types of Java Developer Government jobs in Chicago, IL? The most popular types of Java Developer Government jobs in Chicago, IL are:
Freelance Java Developer Government jobs near you
AI Tools Engineer (Freelance, Remote)

AI Tools Engineer (Freelance, Remote)

Outlier AI

Chicago, IL • Remote

Full-time

This job post has expired 1 day ago. Applications are no longer accepted.

Job description

About the Project

Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. Do you want to shape the future of autonomous agents like OpenClaw?

We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to design, coordinate, and optimize complex, real-world architectural workflows.

Whether you are a passionate orchestration guru or experienced software developer — we want you to help us train the world's most advanced generative systems.

Ideal Qualifications

  • 2+ years of experience in backend engineering, AI automation, or complex systems integration.
  • Proven ability to build and maintain production-grade software with modular separation (e.g., distinct services for data parsing, logic processing, and reporting).
  • Strong command of at least two major languages (e.g., Python, JavaScript, Go, or Java) and experience working with SQL databases.
  • Practical experience building for live, non-mocked environments and handling multi-turn system interactions.
  • Outstanding attention to detail and the ability to provide clear, high-density technical feedback on complex system behaviors.

Nice to have

  • Expertise building multi-stage coordination tasks where data acquisition leads to reasoned output.
  • Hands-on experience integrating agents with live tools such as Supabase, Gmail, and various APIs to solve real-world problems.
  • High level of comfort implementing persistent state and session discovery using MEMORY.md to track agent progress.
  • Experience identifying subtle failures like privacy leaks, authority escalation, or indirect prompt injections.

Apply