Full-Stack Developer - AI Trainer (Sweden)

Anyone AI; Stockholms kommun; On-site; SEK 826,560 - 1,239,840; Part time

Job summary

Anyone AI is seeking skilled Full-Stack Developers for a project with a leading AI lab. This remote, part-time consultant role focuses on designing and evaluating realistic coding tasks, bug fixes, and feature implementations.

Contributors will create multi-file coding tasks, write specifications, extend tests, and review peer submissions. You control your schedule and tools, and rates are paid per project.

Qualifications

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

Python

JavaScript/TypeScript

English proficiency

Full-stack development

Debugging large codebases

Code reviews

Go/Java/C#

Tools

pytest

Jest

JUnit

xUnit

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

• 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