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Website protoio is a web platform enabling users to create fully interactive mobile app prototypes.

Job Description

Use your extensive knowledge of Javascript, HTML5 and CSS3 to improve the web app, an application used by thousands of companies daily. You will collaborate closely with Product, Design, Application Engineering, and QA to spec, build, test and deploy new features.

Your role

  • You will collaborate closely with Product and Design teams to conceptualize new features.
  • You will work with development team to build new features for our large user base.
  • You will improve existing functionality and do performance optimizations.
  • Continuously build and update expertise on latest web technologies.
  • Work within a great team that operates in an agile startup environment.


You fit the job if you have

  • 3+ years of experience writing client-side JavaScript.
  • Deep understanding of CSS3 and HTML5 and modern browser technologies.
  • Deep knowledge and experience with at least one programming language like Python, C/C++, Java or Node.js.
  • Excellent oral and written communications skills and a positive attitude.
  • Never ending desire to self-educate on the latest list of web technologies.
  • Experience with performance optimization and ability to write high-performance code.
  • Experience building and debugging complex systems in a team environment.
  • Opinions on tools and best practices.
  • Work well by yourself on independent projects, without the need for constant supervision.
  • Super fun to work with!

We’d be especially happy if you have

  • Experience with modern web frameworks like, TypeScript, Angular and React.
  • A flair for design and commitment to great user experiences.
  • Experience building and maintaining large-scale single-page web applications.
  • Experience with developing drawing or design tools.


  • Highly competitive salary (13th salary included)
  • MacBook Pro or hardware of your choice
  • Medical insurance
  • Learn and grow your skills at a high-tech startup
  • Company retreat every year
  • Unlimited Foosball, Pool and Arcade games


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