Full-Stack Developer - AI Trainer (Poland)

Anyone AI Inc.; Polska; Remote; PLN 165,000 - 331,000; Part time

Job summary

Anyone AI Inc. is seeking skilled Full-Stack Developers to contribute on a project with a leading AI lab. The role is part-time and project-based, focusing on evaluating realistic software tasks and tests.

Contributors will work remotely, design and assess coding scenarios, review peer submissions, and manage their own schedules with per-project compensation. This consultancy offers flexible engagement terms for talented engineers.

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.

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

Experience 3-7 years

Python

JavaScript/TypeScript

Java

C#

Go

Backend or full-stack development

Testing frameworks

Debug multi-file codebases

Code reviews & migrations

Tools

Python

JavaScript/TypeScript

Java

C#

Go

Job description

Anyone AI is recruiting skilled Full-Stack Developers 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