About OpenTrain

OpenTrain is the #1 platform for finding and building careers in AI training and data labeling. OpenTrain AI contracts specialists for projects where human expertise helps improve the accuracy, reliability, and usefulness of modern AI systems.

As an SQL Query Evaluation Specialist, you will bring advanced database knowledge to high-skill AI training work and help create stronger technical models.

About AI Training Work

AI training is the human side of building artificial intelligence. Experts review model-generated content, identify errors, create reference answers, and explain sound reasoning so AI systems can produce more dependable results.

This remote, flexible industry includes evaluation, response ranking, technical writing, and other project-based work. Your SQL and database expertise can directly shape how AI handles complex data problems.

The Role

OpenTrain AI is seeking an expert SQL Query Evaluation Specialist for a remote, hourly contractor role. You will review AI-generated SQL queries, database designs, and data-processing logic, then produce accurate reference solutions and detailed explanations.

The role focuses on correctness, clarity, prompt adherence, methodology, query structure, indexing strategy, conceptual understanding, performance, and reasoning quality. You will also fact-check data-related claims and compare multiple AI responses.

• $50 per hour
• 20+ hours per week
• Remote contractor role
• Part-time engagement
• Expert experience level
• English-language work

What You'll Do

You will assess technical responses methodically and turn your findings into useful training material. The work combines SQL evaluation, database engineering judgment, technical explanation, and comparative review of AI outputs.

• Review SQL queries, database designs, and data-processing logic generated by AI
• Identify issues in methodology, query structure, indexing strategy, and conceptual reasoning
• Fact-check data-related claims and validate correctness, clarity, and performance
• Write detailed reference solutions and explanations for complex SQL and database problems
• Rate and compare multiple AI responses based on correctness and reasoning quality
• Contribute SQL and database engineering expertise to AI training work

Required Qualifications

This is an expert-level role for a database professional who can explain technical reasoning clearly and spot subtle issues in queries, schemas, and data workflows.

• Expert-level SQL, including complex joins, window functions, aggregation, and query plan analysis
• Experience with database performance tuning, indexing strategies, and concurrency or locking issues
• Hands-on experience with relational data models, schemas, and data warehouse structures
• Strong ETL or ELT experience and familiarity with cloud or on-premises data platforms
• Clear written and spoken English with the ability to explain technical reasoning well
• Bachelor's degree or higher in a related technical field
• Comfort with version control, CI/CD practices, and collaborative database workflows

Helpful Background

Prior experience with AI data training, annotation, or evaluating AI-generated technical content is a strong plus. Familiarity with the following areas will also support success in the role.

• Star schema and snowflake schema design
• Database changes and migrations
• Backup and recovery planning
• Database monitoring
• A methodical approach to finding subtle data or query issues

Location and Application Details

This role is open to qualified contractors in approved countries: Bangladesh, Bhutan, Brazil, Cambodia, Germany, India, Indonesia, Malaysia, Nepal, Pakistan, Singapore, Sri Lanka, Thailand, the Philippines, the United States, Timor-Leste, and Vietnam.

Creating an OpenTrain account is free. Build a profile that reflects your SQL and database expertise, then apply through OpenTrain for this remote AI training opportunity.