Remote Senior Full-Stack Engineer (Contract, 15h/wk)

YO AI Labs; Barcelona; Remote; EUR 83,000 - 124,000; Full time

Job summary

YO AI Labs is seeking a seasoned Full-Stack Software Engineer to support an AI training project. This contractor role offers approximately 15 hours per week with flexible scheduling and fully remote work.

You will develop across front-end and back-end, integrate APIs, review AI-generated code for quality, security, and performance, and adapt builds between languages. Ideal for engineers comfortable with multiple stacks who thrive in fast-paced, distributed teams.

Qualifications

• Experience building front-end and back-end applications.
• Ability to audit and translate code between programming languages.
• Experience evaluating AI-generated code for correctness, security, performance.

Responsibilities

• Develop and debug front-end and back-end applications.
• Build features, APIs, services, and data models.
• Understand and work across unfamiliar codebases.
• Troubleshoot application, API, database, and integration issues.
• Review and evaluate AI-generated code for correctness, security, performance, and maintainability.
• Translate and adapt software builds between programming languages.

Skills

Python

React

JavaScript

Java

Node.js

Rust

Go

TypeScript

Full-stack development

APIs & Databases

Job description

YO AI Labs is seeking a seasoned Full-Stack Software Engineer to support an AI training project. This contractor role offers approximately 15 hours per week with flexible scheduling and fully remote work.

You will develop across front-end and back-end, integrate APIs, review AI-generated code for quality, security, and performance, and adapt builds between languages. Ideal for engineers comfortable with multiple stacks who thrive in fast-paced, distributed teams.