Remote Sr. Full-Stack Engineer for AI Code Review

Between Technology; Barcelona; Remote; EUR 74,000 - 147,000; Part time

Job summary

Between Technology is seeking Sr. Full-Stack Software Engineer to work remotely on an AI training project focused on software development, debugging, code evaluation, and problem-solving.

The role is contractor-based, ~15 hours per week, with a flexible schedule and global remote access. The candidate should demonstrate strong full-stack capabilities across Python, React, JavaScript, TypeScript, Node.js, Java, Rust and Go, and be comfortable working across unfamiliar codebases and diverse

Qualifications

• Experience building full-stack applications in frontend and backend components.
• Proficient with APIs, databases, architecture, and debugging.
• Ability to review and evaluate AI-generated code for correctness, security, and 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

APIs & databases

Job description

Between Technology is seeking Sr. Full-Stack Software Engineer to work remotely on an AI training project focused on software development, debugging, code evaluation, and problem-solving.

The role is contractor-based, ~15 hours per week, with a flexible schedule and global remote access. The candidate should demonstrate strong full-stack capabilities across Python, React, JavaScript, TypeScript, Node.js, Java, Rust and Go, and be comfortable working across unfamiliar codebases and diverse