SQL Developer For AI Data Training

About OpenTrain

OpenTrain is the #1 platform for finding and building careers in AI training and data labeling. We help people discover AI-training projects, build a unified portfolio, and grow freelance careers working on the human side of how AI systems are built.

Creating an OpenTrain account is free. We connect contributors with remote, flexible projects where your work directly shapes how real-world AI systems behave.

About AI training work

AI training (also called data labeling or human feedback work) is the human input that teaches models to perform well. Contributors annotate, curate, validate, and structure data so models learn from high-quality examples.

This kind of work is often remote and flexible, a great fit for part-time schedules, and spans many specialties—from images and audio to code and model evaluation.

• 100% remote: work from anywhere with a computer and internet.
• Flexible hours: many projects let you choose your schedule.
• Impact: your SQL and data work directly improves ML training pipelines and model behavior.

The role — SQL Developer (OpenTrain)

OpenTrain is recruiting an experienced SQL Developer to contribute to AI data training initiatives. This part-time, remote contractor role focuses on designing, optimizing, and maintaining SQL systems that feed machine-learning workflows.

Workload: less than 20 hours per week. Compensation: the project lists hourly pay up to $60 USD (hourly range provided: $25–$60/hr). Employment type: contractor, part-time. Language: English.

• Location: Remote (worldwide)
• Workload: < 20 hours/week
• Pay: up to $60/hour (USD); hourly range $25–$60
• Employment: Contractor, Part-time

What you'll do

You will build and maintain the SQL backbone that supports AI data pipelines and analytics. The role blends hands-on query work, database design, and collaboration with AI engineers and data scientists to ensure data is accurate, accessible, and performant.

• Design, develop, and optimize complex SQL queries for AI training pipelines and analytics.
• Implement and maintain robust database structures to support efficient data processing and retrieval.
• Analyze large datasets, extract insights, and ensure data integrity for machine-learning workflows.
• Write and document technical and user-facing SQL workflows and stored procedures.
• Participate in code reviews, troubleshoot issues, and tune performance of SQL scripts and procedures.
• Communicate findings and recommendations to technical and non-technical stakeholders.

Requirements

The position requires a strong, proven background in SQL development and relational database design. All required skills and qualifications below are drawn from the role description.

• Minimum 4 years hands-on experience as an SQL Developer with a track record of delivering database solutions.
• Deep expertise writing, optimizing, and troubleshooting advanced SQL queries and stored procedures.
• Strong knowledge of data modeling, normalization, and relational database design principles.
• Exceptional written and verbal communication skills; able to explain technical work to non-technical stakeholders.
• Experience working in remote, cross-functional teams and the ability to work independently in a fast-paced environment.
• Keen attention to detail and a passion for data-driven problem solving.

Helpful background (nice to have)

The following experiences are not required but will make you more effective in this role and on AI training projects.

• Experience supporting AI or machine-learning data pipelines or similar data-driven projects.
• Background in AI training data curation or annotation workflows.
• Familiarity with cloud-based database solutions and data engineering tools.

How it works & how to apply

OpenTrain makes it easy to apply and manage AI-training work: create a free account, complete a profile highlighting your SQL and data experience, and apply to this project. OpenTrain will review applicants and coordinate next steps.

This role involves labeling and evaluation tasks related to computer code/programming and evaluation/rating; you'll work closely with engineers and data scientists to ensure datasets meet ML requirements.

• Sign up on OpenTrain and complete your profile (free).
• Apply to this listing and include examples of SQL work, relevant projects, or a brief summary of your database experience.
• Expect interviews or a skills check aligned with SQL query writing, optimization, and database design.