Frontend Engineer (Remote | $70–$100/hr)

Synthires; España; À distance; EUR 40 000 - 70 000; Plein temps

Résumé du poste

Synthires is seeking a frontend engineer to apply engineering expertise in evaluating AI-generated frontend code, UI implementations, and web applications. You'll help improve coding accuracy, reasoning, UI quality, and software engineering capabilities of next-generation AI systems.

The role emphasizes strong frontend skills, including React/Angular/Vue, HTML/CSS, responsive design, and pixel-perfect interfaces. You will work in a fully remote setup, collaborating with teams across locations.

Qualifications

• Bachelor's degree or equivalent professional experience in a technical field.
• Professional frontend experience in web development or UI engineering.
• Experience with React, Angular, Vue.js or similar.
• Strong HTML, CSS, responsive design and component-based architecture.
• Experience delivering pixel-accurate UI and style guides.
• Strong debugging, code review, and performance optimization skills.
• Excellent analytical thinking and written communication.
• Ability to work fully remotely.

Responsabilités

• Evaluate AI-generated frontend code, UI implementations, and web apps for correctness and quality.
• Build, review, and improve responsive, accessible web interfaces.
• Identify bugs, edge cases, rendering issues, accessibility concerns, and bottlenecks.
• Implement and evaluate components, design systems, and interactive web features.
• Ensure pixel-perfect UI across devices and screen sizes.
• Debug and refactor frontend codebases to improve performance and maintainability.
• Provide structured technical feedback to improve AI coding accuracy and frontend development.

Connaissances

Frontend engineering

Frontend development

Web development

UI engineering

React

Angular

Vue.js

HTML

CSS

Responsive design

Pixel-precise UI implementation

Debugging

Code review

Performance optimization

Independent remote work

Analytical thinking

Written communication

Formation

Bachelor's degree or equivalent in Computer Science or related field

Outils

Next.js

Git

GitHub

CI/CD pipelines

API integration

Design systems

UI component libraries

Description du poste

In this role, you'll apply your engineering expertise to evaluate AI-generated frontend code, user interfaces, web applications, and technical implementations. Your work will help improve the coding accuracy, reasoning, UI quality, and software engineering capabilities of next-generation AI systems.

No prior AI experience is required. Your frontend engineering expertise, programming skills, and experience building high-quality web interfaces are the primary qualifications for success in this role.

Responsibilities

• Evaluate AI-generated frontend code, web applications, and UI implementations for correctness, quality, maintainability, and performance.
• Build, review, and improve responsive, accessible, and user-friendly web interfaces.
• Review AI-generated implementations for bugs, edge cases, rendering issues, accessibility concerns, and performance bottlenecks.
• Implement and evaluate components, design systems, user interfaces, and interactive web features.
• Ensure pixel-accurate UI implementation while maintaining responsiveness across different devices and screen sizes.
• Debug and refactor existing frontend codebases to improve performance, scalability, and maintainability.
• Provide structured technical feedback to improve AI coding accuracy, reasoning, and frontend development capabilities.

Required Qualifications

• Bachelor's degree or equivalent professional experience in Computer Science, Software Engineering, Information Technology, or a related technical field.
• Professional experience in frontend engineering, frontend development, web development, or UI engineering.
• Experience with modern frontend frameworks such as React, Angular, Vue.js, or similar technologies.
• Strong understanding of HTML, CSS, responsive design, and component-based architecture.
• Experience implementing pixel-accurate user interfaces and component style guides.
• Strong skills in debugging, code review, performance optimization, and frontend problem-solving.
• Excellent analytical thinking, written communication, and attention to detail.
• Ability to work independently in a fully remote environment.

Preferred Qualifications

• Experience building large-scale web applications or production frontend systems.
• Familiarity with Next.js, state management libraries, frontend testing frameworks, and API integration.
• Experience with design systems, UI component libraries, and accessibility standards.
• Familiarity with Git, GitHub, CI/CD pipelines, and modern frontend development workflows.
• Familiarity with AI coding tools, AI-assisted development, or AI model evaluation.