Freelance Senior UI Engineer

HugeInc
Full-time•Colombia

📍 Job Overview

Job Title: Freelance Senior UI Engineer

Company: HugeInc

Location: Colombia

Job Type: Contract

Category: Frontend Engineering / UI Development

Date Posted: July 30, 2026

Experience Level: 5-10 Years

Remote Status: Fully Remote

🚀 Role Summary

  • Design, develop, and maintain scalable frontend applications leveraging modern JavaScript frameworks like React and Next.js, with a strong emphasis on TypeScript.

  • Build reusable, accessible, and maintainable UI components that adhere to established design systems and engineering standards, ensuring a consistent user experience.

  • Integrate frontend applications with backend services through RESTful APIs and GraphQL, facilitating dynamic and data-driven digital experiences.

  • Collaborate closely with cross-functional teams including UX designers, product managers, and QA analysts throughout the full software development lifecycle in an Agile environment.

  • Focus on optimizing application performance and ensuring adherence to accessibility standards (WCAG, ARIA) to deliver high-quality, inclusive digital products.

📝 Enhancement Note: This role is specifically a freelance contract position with a defined start and end date, requiring candidates to use their own equipment. The focus is on building modern, scalable, and accessible digital experiences, highlighting the need for strong frontend development skills within an Agile framework.

📈 Primary Responsibilities

  • Architect, develop, and iterate on scalable frontend applications utilizing React, Next.js, TypeScript, and modern JavaScript (ES202x).

  • Create and manage a library of reusable, accessible, and maintainable UI components, ensuring alignment with design systems and engineering best practices.

  • Develop and integrate with robust RESTful APIs and GraphQL services to power dynamic web applications and ensure seamless data flow.

  • Actively participate in cross-functional team collaboration, including code reviews, technical design discussions, and sprint planning within an Agile methodology.

  • Implement performance optimization strategies using profiling tools, Lighthouse audits, and adherence to Core Web Vitals, ensuring fast and responsive user experiences.

  • Champion accessibility by ensuring all developed applications meet WCAG and ARIA guidelines, promoting inclusive design principles.

  • Troubleshoot and resolve complex frontend issues, contributing to the overall stability and quality of the software solutions.

  • Manage and prioritize tasks effectively within a fast-paced Agile development environment, ensuring timely delivery of project milestones.

  • Contribute to the continuous improvement of engineering practices, code quality, and technical documentation.

📝 Enhancement Note: The responsibilities emphasize hands-on development, component reusability, API integration, and a strong focus on performance and accessibility. The iterative nature of Agile development and continuous improvement are key themes.

🎓 Skills & Qualifications

Education: A Bachelor's degree in Engineering or a related field is preferred. For candidates holding such a degree, a professional engineering license (from governing bodies like COP NIA or Consejo Profesional) is required.

Experience: 5+ years of professional experience developing web applications within Agile software development teams.

Required Skills:

  • Expert-level proficiency in JavaScript (ES202x), TypeScript, React.js, and Next.js.

  • Demonstrated experience designing, building, and consuming RESTful APIs and GraphQL services.

  • Advanced skills in Sass or other CSS preprocessors for efficient styling.

  • Proven experience in building and maintaining server-side applications and APIs.

  • Strong understanding of Object-Oriented Programming (OOP) principles and software design patterns.

  • In-depth knowledge of accessibility standards, including WCAG, ARIA, and inclusive design principles.

  • Experience in application performance optimization using tools like Lighthouse, performance profiling, and Core Web Vitals.

  • Proven ability to collaborate effectively with QA analysts, UX designers, visual designers, business analysts, and cross-functional engineering teams.

  • Excellent problem-solving capabilities and the ability to thrive in a collaborative, fast-paced environment.

  • Professional English proficiency with strong verbal and written communication skills. Preferred Skills:

  • Experience with modern frontend build tools and module bundlers (e.g., Webpack, Vite).

  • Familiarity with state management libraries (e.g., Redux, Zustand, Jotai).

  • Experience with unit and integration testing frameworks (e.g., Jest, React Testing Library).

  • Knowledge of CI/CD pipelines and deployment strategies for frontend applications.

📝 Enhancement Note: The requirements highlight a significant level of senior-level expertise in core frontend technologies, with a strong emphasis on practical application in team environments and a deep understanding of performance and accessibility. The specific requirement for a professional license for degree holders in Colombia is a unique regional consideration.

📊 Process & Systems Portfolio Requirements

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Application Requirements

Candidates must have 5+ years of experience in Agile software development with strong expertise in React, Next.js, and modern frontend technologies. A professional engineering license is required if the candidate holds a degree in Engineering or a related profession.