# Full-Stack Developer - AI Trainer (Poland) at Anyone AI

> Open job at Anyone AI in Warsaw, Poland. Workplace: Remote (Poland).

Source: Poland Dev Jobs, https://poland-devjobs.com/jobs/anyone-ai-full-stack-developer-ai-trainer-poland-eiw4plk
Posted 9 July 2026. Last checked on the employer's career site: 10 November 2026.

## Facts

- Company: [Anyone AI](https://poland-devjobs.com/companies/anyone-ai)
- Location: Warsaw, Poland
- Workplace: Remote (Poland)
- Employment type: Contract
- Polish: Not required
- English: Fluent
- Skills: C#, Go, Java, JavaScript, Jest, Python, TypeScript
- Not mentioned in the job post: salary, visa sponsorship, relocation, where you can apply from

## 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

## How to apply

Apply on the job page, https://poland-devjobs.com/jobs/anyone-ai-full-stack-developer-ai-trainer-poland-eiw4plk: its Apply button opens the employer's own application page.

## More jobs from Anyone AI

- [AI Coding Evaluator](https://poland-devjobs.com/jobs/anyone-ai-ai-coding-evaluator-h1wcy7m): Anyone AI, Warsaw, Poland. Remote (Poland). Posted 12 October 2026.
- [AI Agent Evaluator](https://poland-devjobs.com/jobs/anyone-ai-ai-agent-evaluator-8fy2v3j): Anyone AI, Warsaw, Poland. Remote (Poland). Posted 12 October 2026.