Careers at Jonajo

Front-end Javascript Developer Intern

Front-end Javascript Developer Intern

Location: Flexible / Remote

Type: Internship (Unpaid)

Duration: 3-6 months

About Jonajo Consulting:

Jonajo Consulting, based in Silicon Valley, is a forward-thinking company dedicated to helping businesses succeed through innovation and best practices. We pride ourselves on creating a dynamic and inclusive work environment where creativity, technical excellence, and collaboration are at the forefront. Our team is composed of talented individuals who are passionate about delivering high-quality web, mobile, and platform solutions.

About the Role:

We are offering an unpaid Software Engineering Internship with a strong focus on frontend development, while also providing exposure to backend engineering. This role is ideal for students or recent graduates who want to gain real-world experience building polished, responsive user interfaces and contributing to full-stack development in a fast-paced startup environment.

Job Responsibilities:

  • Convert UI/UX designs into responsive, high-fidelity HTML, CSS, and JavaScript.
  • Build dynamic, interactive user interfaces using JavaScript and modern frontend frameworks.
  • Ensure cross-browser and cross-device compatibility through thorough testing and debugging.
  • Improve and maintain existing frontend components to enhance performance and user experience.
  • Collaborate with designers and product managers to deliver clean, user-friendly UI implementations.
  • Optimize frontend performance, accessibility, and loading speed.
  • Assist in integrating frontend components with backend APIs and services.
  • Write clean, modular, maintainable code across the stack.
  • Participate in code reviews, testing, and documentation to ensure code quality and consistency.
  • Explore and learn modern engineering tools, frameworks, and best practices.

Basic Qualifications:

  • Currently pursuing or recently completed a Bachelor’s, Master’s, or PhD in Computer Science, Computer Engineering, Data Science, Machine Learning, or a related field.
  • Strong familiarity with ES5/ES6 JavaScript, DOM manipulation, CSS layout techniques, and responsive web design.
  • Ability to troubleshoot layout issues and understand cross-browser compatibility.
  • Basic experience with frontend frameworks (e.g., React, Vue) is a plus.
  • Proficiency with Git or other version control systems.
  • Strong problem-solving skills, attention to detail, and willingness to learn.
  • Effective communication and ability to collaborate in a fast-paced team environment.

What We Offer:

  • Real-world experience in a dynamic software development team.
  • Exposure to cutting-edge technologies and industry best practices.
  • Mentorship from experienced professionals.
  • Flexible work hours to accommodate academic commitments.
  • An opportunity to build a professional network in the tech industry.

How to Apply:

Please submit your resume along with a brief message in your application explaining why you are interested in this internship, including any relevant JavaScript projects or coursework.

Last Updated:
November 26, 2025

Department:
Engineering

English Level:
Business (TOEFL 590+)
Location:
Anywhere in North America
Monterrey, Mexico

Years of Experience:
0
Monterrey, Mexico

Apply Here

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