Java Developer — AI/LLM Training (Long-Term, Remote)

About OpenTrain

OpenTrain is the #1 platform for finding and building careers in AI training and data labeling. We hire and contract contributors directly to create the human examples that teach modern AI systems.

Working with OpenTrain puts you on the cutting edge of how AI gets built — remote, flexible, and focused on skills rather than traditional corporate structures.

About AI Training Work

AI training (also called data labeling or annotation) is the human work that helps models learn correct code and behavior. Tasks range from writing examples and test cases to reviewing and fixing model-generated outputs.

This project focuses on programming: you will produce accurate Java examples and repair AI-generated code so models learn to write, debug, and optimize Java programs.

The Role

We are hiring Java developers for a long-term contract (6 months or longer). This is an early-career (entry-level) role that nevertheless requires at least 2 years of professional Java experience.

You will work 20–40 hours per week on a flexible schedule, fully remote. OpenTrain AI is the hiring and contracting organization for this role.

• Contract type: Contractor, part-time.
• Commitment: 20–40 hours per week; flexible schedule.
• Duration: 6+ months (long-term project).
• Pay: $6.75 per hour (USD).

What You’ll Do

Your day-to-day work will focus on creating high-quality Java training data and validating AI outputs so models produce reliable, readable code.

Tasks are precise and example-driven: write short programs, fix bugs, refactor snippets, and ensure AI-generated code meets the project’s standards.

• Write code snippets and short Java programs from text prompts.
• Debug and correct AI-generated Java code with clear, minimal fixes.
• Create and document training examples and expected outputs.
• Refine and optimize Java code for clarity, correctness, and performance.
• Follow project guidelines to keep dataset quality consistent and reproducible.

Requirements

Candidates must meet all mandatory requirements below. The project requires reliable remote work conditions and effective communication in English.

After you submit a proposal, you will be sent a Java coding assessment to complete as part of screening.

• Degree: Bachelor’s or Master’s in Computer Science, Engineering, or a related field.
• Experience: Minimum 2 years of professional software development with a strong focus on Java.
• Note: Applicants with less than 2 years’ experience will receive a Qualification Score below 7.
• Skills: Proven ability to develop, troubleshoot, and optimize Java code; strong problem-solving and attention to detail.
• Communication: Effective English communication skills.
• Logistics: Stable internet connection and reliable electricity for consistent remote work.
• Availability: Ability to commit 20–40 hours per week for at least 6 months.

Who Should Apply

Apply if you enjoy hands-on Java work, care about code quality, and want to help shape how AI systems write and fix code. This project fits developers who prefer flexible remote contracts and steady, long-term work.

This role is especially suitable for early-career developers who already have solid Java experience and want to contribute to state-of-the-art AI training.

How It Works / How To Apply

Create or sign in to your OpenTrain account and submit a proposal for this role. After submission we will send a Java coding assessment; passing the assessment is required to join the project.

If selected you’ll be contracted by OpenTrain AI and assigned tasks through our platform. You set your own hours within the 20–40 hr/week commitment and complete assignments according to project guidelines.

• Submit a proposal via your OpenTrain profile to begin screening.
• Complete the Java coding assessment sent after proposal submission.
• If accepted, follow project-specific onboarding and quality guidelines provided by OpenTrain.