Backend Developer (Python/JavaScript)

Location: Brazil; remote

Salary: $45–$80 per hour; project-based consultants are paid per project, with hourly rates estimated from anticipated completion time.

Company

hirify.global provides expert evaluation contributors for projects with leading AI labs.

What you will do

• Design and implement multi-file coding tasks covering bug fixes, feature development, refactoring, migrations, and testing.
• Write natural-language specifications and complete reference implementations.
• Develop and extend unit and integration test suites.
• Review peer-generated tasks for correctness, clarity, realism, and alignment between specifications, code, and expected outputs.
• Identify edge cases, ambiguities, and potential failure modes, providing structured and actionable feedback.

Requirements

• Advanced professional written English proficiency.
• 3–7 years of professional software engineering experience.
• Strong proficiency in Python and JavaScript/TypeScript; working knowledge of Java, C#, or Go.
• Backend or full-stack development experience with production systems.
• Experience with testing frameworks such as pytest, Jest, JUnit, xUnit, or Go testing.
• Ability to debug and navigate large, multi-file codebases.
• Experience with code reviews, refactoring, and production migrations.

Culture & Benefits

• Part-time, project-based expert evaluation engagement.
• Remote work with control over the work schedule.
• Consultants provide their own tools and may simultaneously work with other vendors or employers, subject to those parties’ allowances.
• Project-based consultant arrangement with payment per completed project.