Full-Stack Developer (Brazil)

Anyone AI Inc.; Brasil; Remote; BRL 124,000 - 207,000; Part time

Job summary

Anyone AI Inc. is seeking skilled Full-Stack Developers (Python, JavaScript/TypeScript) to work on a project with a leading AI Lab. This is a remote, part-time consultant role with per-project compensation, flexible hours, and independent work.

You will design and implement multi-file tasks, write specs, and develop unit and integration tests, while reviewing peer submissions for quality and realism. Ideal candidates have 3–7 years of software experience, strong Python/JS/TS, English

Qualifications

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

Responsibilities

• Design and implement multi-file coding tasks across bug fixing, feature development, refactoring, and testing
• Write clear natural-language specifications and reference implementations
• Develop and extend unit and integration test suites
• Review peer-generated tasks for correctness, clarity, and realism
• Identify edge cases, ambiguities, and potential failure modes
• Ensure alignment between specifications, code, and expected outputs

Skills

English proficiency

Python

JavaScript/TypeScript

Java/C#/Go

Backend / Full-stack

Testing frameworks

Debugging large codebases

Code reviews & migrations

Tools

pytest

Jest

JUnit

xUnit

Go testing

Job description

Anyone AI is recruiting skilled Full-Stack Developers (Python, Javascript/TypeScript) to work on a project with a leading AI Lab.

Qualifications:

• Advanced professional written proficiency in English

• 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 in production systems

• Experience with testing frameworks (e.g., pytest, Jest, JUnit, xUnit, Go testing)

• Proven ability to debug and navigate large, multi-file codebases

• Experience with code reviews, refactoring, and production migrations

Engagement:

Part-time, project-based expert evaluation work

Work Type:

Remote

Contributors will design and evaluate realistic software engineering tasks, including bug resolution, feature implementation, refactoring/migration, and test generation. Work includes both creating complex coding scenarios and reviewing peer submissions for quality and accuracy.

This is a project-based consultant role. Consultants will be paid on a per-project basis; hourly rates are estimates based on anticipated completion time. Consultants control their own schedule, provide their own tools, and may simultaneously provide services to other vendors/employers (subject to those vendors’ allowances).

Responsibilities:

Contributors will:

• Design and implement multi-file coding tasks across bug fixing, feature development, refactoring, and testing

• Write clear natural-language specifications and reference implementations

• Develop and extend unit and integration test suites

• Review peer-generated tasks for correctness, clarity, and realism

• Identify edge cases, ambiguities, and potential failure modes

• Ensure alignment between specifications, code, and expected outputs

Expected Outcomes:

• High-quality, production-realistic coding tasks

• Complete and correct reference implementations

• Robust test coverage and validation artifacts

• Structured, actionable peer review feedback