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# Frontend Engineer (Remote | $65-$120/Hr)

- **Company:** Synthires
- **Location:** Vitoria-Gasteiz, Spain (Remote available)
- **Salary:** €135,200.0
- **Contract:** Permanent contract
- **Skills:** Web Interfaces, HTML, JavaScript (Programming Language), Web Accessibility, Artificial Intelligence, Component-Based Software Engineering, Browser Compatibility, Cascading Style Sheets (CSS), Code Review, Collaborative Software, Computer Programming, Continuous Integration, Software Debugging, Web Development, Github, Design of User Interfaces, Open Source Technology, Performance Tuning, Next.js, Responsive Web Design, Software Engineering, TypeScript, Web Applications, Web Application Frameworks, Web Performance Optimization, Web Usability, ReactJS, Git, Vue.js, AngularJS, Material UI, Information Technology, Front End Software Development, React Redux
- **Published:** August 23, 2026
- **Apply:** https://www.buscojobs.com.es/frontend-engineer-remote-65-120-hr-en-vitoria-ID-368807484

## About the Role

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 .
Strong proficiency in
JavaScript and/or TypeScript .
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 .
Experience optimizing
web performance, Core Web Vitals, and browser rendering performance .
Familiarity with
AI coding tools, AI-assisted development, or AI model evaluation .
Experience contributing to
open-source projects or collaborative software development environments .

## Description

Frontend EngineerPosition:Frontend EngineerType:ContractCompensation:(Remote | $65-$120/hr)Location:RemoteAbout the Opportunity This opportunity is for experiencedFrontend Engineerswith expertise infrontend development, JavaScript, TypeScript, modern web frameworks, UI implementation, responsive design, and web performanceto contribute to advancedAI research and evaluation projects .In this role, you'll 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 inJavaScript, TypeScript, 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 Bachelor's degree or equivalent professional experienceinComputer Science, Software Engineering, Information Technology, or a related technical field .Professional experience infrontend engineering, frontend development, web development, or UI engineering .Strong proficiency inJavaScript and/or TypeScript .Experience with modern frontend frameworks such asReact, 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 withNext.js, state management libraries, frontend testing frameworks, and API integration .Experience withdesign systems, UI component libraries, and accessibility standards .Familiarity withGit, GitHub, 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 LinkedIn Check Email for Next Steps Participate in Resume Evaluation & Interview Stage


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