Senior Full-Stack Engineer - Remote Contractor (AI Code QA)

AgileEngine, LLC.; Zaragoza; Remote; EUR 49,000 - 98,000; Full time

Job summary

AgileEngine, LLC. is seeking an experienced Sr. Full-Stack Software Engineer to support an AI training project. This fully remote contractor role focuses on developing and debugging front-end and back-end systems, building APIs, and evaluating AI-generated code for quality and security.

You will work across languages and codebases, translating software builds and maintaining robust data models while ensuring performance and reliability in a flexible schedule.

Qualifications

• Proficient in Python and modern full-stack development.
• Strong experience with React, JavaScript, and TypeScript.
• Experience building APIs, data models, and scalable apps.
• Ability to debug across frontend, backend, and databases.
• Familiarity with AI code evaluation and cross-language builds.

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 expertise

APIs & databases

Job description

AgileEngine, LLC. is seeking an experienced Sr. Full-Stack Software Engineer to support an AI training project. This fully remote contractor role focuses on developing and debugging front-end and back-end systems, building APIs, and evaluating AI-generated code for quality and security.

You will work across languages and codebases, translating software builds and maintaining robust data models while ensuring performance and reliability in a flexible schedule.