Frontend Engineer
Position: Frontend Engineer
Type: Contract
Compensation:(Remote | $65–$120/hr)
Location: Remote
About the Opportunity
This opportunity is for experienced Frontend Engineerswith expertise infrontend development, Java Script, Type Script, modern web frameworks, UI implementation, responsive design, and web performanceto contribute to advancedAI research and evaluation projects.
In this role, youll apply your engineering expertise to evaluateAI-generated frontend code, user interfaces, web applications, and technical implementations.
Your work will help improve thecoding accuracy, reasoning, UI quality, and software engineering capabilitiesof next-generation AI systems.
No priorAI experienceis required.
Yourfrontend engineering expertise, programming skills, and experience building high-quality web interfacesare the primary qualifications for success in this role.
Responsibilities
EvaluateAI-generated frontend code, web applications, and UI implementationsforcorrectness, quality, maintainability, and performance.
Build, review, and improveresponsive, accessible, and user-friendly web interfaces.
Apply expertise in Java Script, Type Script, HTML, CSS, and modern frontend frameworks.
Review AI-generated implementations forbugs, edge cases, rendering issues, accessibility concerns, and performance bottlenecks.
Implement and evaluatecomponents, design systems, user interfaces, and interactive web features.
Ensurepixel-accurate UI implementationwhile maintaining responsiveness across different devices and screen sizes.
Debug and refactor existingfrontend codebasesto improveperformance, scalability, and maintainability.
Apply best practices inweb accessibility, browser compatibility, frontend architecture, and user experience.




Provide structured technical feedback to improveAI coding accuracy, reasoning, and frontend development capabilities.
Required Qualifications
Bachelors degree or equivalent professional experiencein Computer Science, Software Engineering, Information Technology, or a related technical field.
Professional experience infrontend engineering, frontend development, web development, or UI engineering.
Strong proficiency in Java Script and/or Type Script.
Experience with modern frontend frameworks such as React, Angular, Vue.js, or similar technologies.
Strong understanding ofHTML, CSS, responsive design, and component-based architecture.
Experience implementingpixel-accurate user interfaces and component style guides.
Strong skills indebugging, code review, performance optimization, and frontend problem-solving.
Excellentanalytical thinking, written communication, and attention to detail.
Ability to work independently in afully remote environment.
Preferred Qualifications
Experience buildinglarge-scale web applications or production frontend systems.
Familiarity with Next.js, state management libraries, frontend testing frameworks, and API integration.
Experience withdesign systems, UI component libraries, and accessibility standards.
Familiarity with Git, Git Hub, CI/CD pipelines, and modern frontend development workflows.
Experience optimizingweb performance, Core Web Vitals, and browser rendering performance.
Familiarity withAI coding tools, AI-assisted development, or AI model evaluation.
Experience contributing toopen-source projects or collaborative software development environments.
Compensation
Competitive compensation of up to $90/hour.
Weekly payments.
Independent contractor engagement.
Application Process
Easy Apply on Linked In
Check Email for Next Steps
Participate in Resume Evaluation & Interview Stage

📌 Frontend Engineer (Remote | $65–$120/Hr) (España)
🏢 Synthires
📍 España