Full Stack Software Engineers for AI Training

LiftedanUpworkCompany

Brasília, DF, Brazil Remote contract

Posted: March 31, 2026

Quick Summary

We are seeking a Full Stack Software Engineer to join our team to help shape the future of AI by improving AI models with human feedback. The ideal candidate will have expertise in software engineering concepts and fullstack development, with a focus on generating AI models and debugging techniques.

Required Skills

Job Description

We have partnered to one of our enterprise client that helps the world's  most innovative companies improve their AI models by providing human feedback.

Are you an experienced software engineer who wants to help shape the future of AI?

The projects' focus is helping generative AI improve its understanding of software development practices, coding standards, debugging techniques, and collaborative engineering workflows.

You may contribute your expertise by:

• Creating and answering technical questions about software engineering concepts and fullstack development, coding best practices, and debugging strategies to help train AI models
• Reviewing and evaluating code generated by AI in languages such as JavaScript, Python, Go, Java, TypeScript, and C++
• Analyzing code quality, maintainability, and adherence to real-world engineering standards
• Providing expert-level feedback on version control workflows, collaborative coding practices, and effective debugging techniques

We’re looking for people with: 

• 3+ years of professional software engineering experience with full stack development
• Proficiency in at least two of the following languages: JavaScript, Python, Go, Java, TypeScript, or C++ -
• Professional experience building and maintaining production-grade software systems
• Strong knowledge of Git (or similar version control systems), including experience with branching, merging, and collaborative development workflows
• Outstanding attention to detail and ability to clearly communicate technical feedback and coding best practices

Nice to have:

• Backend engineering expertise with experience designing and scaling server-side systems 
• Test-Driven Development (TDD) experience and strong testing discipline
• Experience authoring technical specifications and API contracts
• Hands-on expertise with testing frameworks such as PyTest, JUnit, Mocha, or similar tools
• Experience conducting code reviews, debugging complex issues, and analyzing large codebases
• Zero-to-one experience as a founding engineer or early employee at a startup

• Remote work – complete tasks anytime, anywhere
• Flexible– matched to assignments based on fit and availability
• No guaranteed hours – workload may vary weekly

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