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Urgent! Frontend Engineer React+typescript+A/B+testing +Graphql Career Opportunity with FitNext Co. in Brazil

Frontend Engineer React+typescript+A/B+testing +Graphql



Job description

Job Title: Frontend Engineer


Location: Remote (Argentina or Brazil)
Employment Type:
Full time

Experience Level: Sênior

Rate: Basead on experience


Role Summary:


We are seeking a Frontend Engineer with significant experience building and scaling high-traffic B2C applications (10M+ daily active users).

This is a high-impact, technical role focused on enhancing the user experience on one of the most visited pages of a global platform.


The ideal candidate has deep expertise in React, TypeScript, A/B Testing, and GraphQL, with a background in product engineering and a strong sense of ownership.


Key Responsibilities:




  • Develop, test, and launch high-quality frontend features for large-scale consumer-facing applications.




  • Collaborate with cross-functional teams including product managers, designers, and backend engineers.




  • Take technical ownership of high-traffic components, such as the Comments Page.




  • Review code, contribute to architectural discussions, and help establish development best practices.




  • Mentor junior engineers and support the growth of the engineering team.




Required Skills & Experience:




  • 10+ years of hands-on experience in frontend software development.




  • Proficiency in JavaScript, TypeScript, and modern frameworks like React, Vue, Angular, LIT, or Polymer.




  • Strong knowledge of CSS, responsive design, and UI performance optimization.




  • Experience with GraphQL, REST APIs, and scalable API design.




  • Understanding of distributed systems and large-scale data handling.




  • Excellent collaboration and communication skills in a fully remote environment.




  • Bachelor's degree in Computer Science or equivalent practical experience.




Preferred Qualifications:




  • Experience working on applications with over 10 million daily active users.




  • Familiarity with modern product engineering practices such as A/B testing and feature flagging.




  • Background working in large engineering teams and distributed system environments.






Required Skill Profession

Computer Occupations



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