Senior Level SQL Annotator

We are seeking an experienced Senior Level SQL Annotator to review, annotate, and evaluate AI-generated SQL responses for correctness, clarity, and performance. This role involves creating detailed prompts, assessing solutions, and collaborating with ML Engineers to improve model accuracy.

Responsibilities

• Review, annotate and evaluate AI-generated SQL responses for correctness, clarity, query logic, joins, syntax, performance, security, and readability.
• Create detailed prompts and reference solutions to guide AI learning on complex data challenges.
• Assess solutions for accuracy, adherence to prompts, and identify errors in methodology, query structure, indexing strategy, or conceptual understanding.
• Deliver clear, constructive feedback and detailed technical explanations to support continuous model improvement.
• Run and validate proof-of-work code, fact check data-related claims, and rate/compared AI responses based on reasoning quality.
• Build automated SQL audit queries that can scan the annotated dataset daily to flag duplicates, conflicting labels, null values, or out of distribution samples before they reach the ML Team.
• Partner with ML Engineers to test proposed annotation guidelines against actual database records.

Requirements

• 7+ years of professional experience working with SQL in production environments as a Database Engineer, SQL Developer, Data Engineer, or similar role.
• Bachelor’s degree or higher in computer science, information systems, engineering, mathematics, or a related technical field.
• Expert-level proficiency in SQL, including complex joins, window functions, aggregation strategies, query plan analysis, and performance tuning.
• Hands-on experience designing relational data models, schemas, and data warehouse structures (star and snowflake schemas).
• Exceptional written and spoken English (C1 level or higher) with the ability to write clear technical explanations.
• A methodical, systematic approach to evaluating reasoning quality and identifying subtle data or query issues.

Salary N700,000 to N1,000,000 monthly

How to Apply Interested and qualified candidates should send their CV to: cvs@odixcityconsulting.com.ng using the job title as the subject of the mail.