Summary: This senior-level role focuses on rigorous technical review and validation of coding issues and automated tests for AI model training, emphasizing judgment and quality. Highlights: 1. Expert-level technical review for AI systems 2. Focus on technical judgment and quality assurance 3. Challenging problem definitions and questioning tests **About Vetto** Vetto is a tech company focused on building and scaling high\-quality datasets for artificial intelligence systems. We work at the intersection of human expertise and AI, ensuring that models are trained on technically accurate, well\-defined, and realistic data. Our projects support the training and evaluation of Large Language Models (LLMs), where technical rigor and correctness are non\-negotiable. **About the Project** This project focuses on the technical review and validation of coding issues and automated tests used to train AI models. The core responsibility of this role is to evaluate whether: * a coding issue is technically well\-defined, and * the associated tests truly validate whether the issue has been solved. Tests are treated as the mechanism of truth in this context. Your role is to ensure those mechanisms are correct, robust, and aligned with real\-world software behavior. Error criticality is high — mistakes propagate at scale into AI systems. **Responsibilities** * Review and analyze coding issues written in Python and JavaScript * Validate whether issues are clear, correct, and technically sound * Determine whether tests actually validate the problem described * Identify gaps, ambiguities, false positives, and false negatives in test suites * Evaluate whether a solution that passes the tests truly solves the real problem * Apply strict technical criteria and quality standards consistently **Required Profile** This role is designed for senior\-level experts with real market experience. **Technical requirements** * Senior\-level experience with Python * Senior\-level experience with JavaScript * Proven experience working in production environments * Strong experience reviewing code written by other engineers * Strong experience reviewing and validating automated tests * Deep understanding of how tests validate (or fail to validate) expected behavior * High attention to detail and strong technical judgment * Comfortable working fully in English (reading and writing) **Nice to have** * Experience with test\-driven development or test design * Experience working on large or complex codebases * Familiarity with AI, ML, or data\-centric projects **Work Model and Project Details** This is expert, task\-based technical work focused on analysis, validation, and judgment rather than code production. Tasks are reviewed under continuous QA and calibration, with workload distributed across approved experts. The expected start date is mid\-February, and the project runs through February 13\. Compensation is in the range of R$300–R$500 per hour (task\-equivalent reference), varying based on task complexity and volume. **Selection Process** The selection process includes an application review with technical screening questions, followed by a short technical review exercise focused on issues and tests. No traditional interviews are required. **Final Note** This role is not about writing more code. It is about technical judgment, rigor, and responsibility. If you are comfortable challenging problem definitions, questioning tests that "pass but are wrong", and acting as a technical quality gate, this project is for you.