Senior Fullstack Engineer – React/JS

Ryzlabs
Buenos Aires • Remote • Senior • vor 1 Tagen
Full Stack Developer Frontend Developer Full Stack Developer Software Engineer
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Remote position, only for professionals based in Argentina or Uruguay

RYZ Labs is seeking a Full Stack Engineer (React / JavaScript) to join one of our clients’ teams building intelligent, secure, and scalable digital experiences. In this role, you will contribute to modernizing existing applications while building new user-facing features using React and modern JavaScript technologies.

You will work closely with cross-functional teams including backend, product, and platform engineers to deliver reliable and scalable solutions. The ideal candidate will help evolve the front-end architecture while navigating a legacy environment and integrating modern technologies.

Responsibilities

  • Develop and maintain modern React-based user interfaces using clean, reusable, and maintainable code.

  • Build responsive and intuitive UI components using React and Material UI (MUI).

  • Implement styling using SCSS while maintaining consistent design and UI standards.

  • Integrate front-end applications with REST APIs and backend services.

  • Collaborate with backend engineers to deliver end-to-end product functionality.

  • Participate in the modernization of legacy applications and help migrate existing features to modern front-end frameworks.

  • Maintain and improve existing codebases while ensuring scalability, performance, and maintainability.

  • Write and maintain unit and integration tests to ensure code quality.

  • Review code and provide constructive technical feedback to team members.

  • Debug and resolve production issues across the application stack.

  • Contribute to front-end architecture decisions and development best practices.

  • Participate actively in Agile ceremonies, including stand-ups, sprint planning, and retrospectives.

  • Create and maintain technical documentation.

  • Stay current with modern front-end development practices and tooling.

Qualifications

  • 5+ years of professional experience in software development.

  • Strong experience with React and modern JavaScript frameworks.

  • Proficiency in JavaScript and/or TypeScript.

  • Experience building UI using Material UI (MUI).

  • Strong experience with SCSS or modern CSS frameworks.

  • Experience integrating REST APIs into modern web applications.

  • Proficiency with Git version control.

  • Experience building responsive and user-friendly web applications.

  • Experience working in Agile development environments.

  • Strong collaboration and communication skills across engineering teams.

Nice to Have

  • Familiarity with ASP.NET WebForms and Razor templating.

  • Ability to read and understand C# code.

  • Experience with Gulp or similar asset pipeline tools.

  • Experience with testing frameworks such as NUnit or Jest.

  • Familiarity with Azure DevOps and NuGet.

  • Experience working in legacy modernization projects.

Remote position, only for professionals based in Argentina or Uruguay

RYZ Labs is seeking a Full Stack Engineer (React / JavaScript) to join one of our clients’ teams building intelligent, secure, and scalable digital experiences. In this role, you will contribute to modernizing existing applications while building new user-facing features using React and modern JavaScript technologies.

You will work closely with cross-functional teams including backend, product, and platform engineers to deliver reliable and scalable solutions. The ideal candidate will help evolve the front-end architecture while navigating a legacy environment and integrating modern technologies.

Responsibilities

  • Develop and maintain modern React-based user interfaces using clean, reusable, and maintainable code.

  • Build responsive and intuitive UI components using React and Material UI (MUI).

  • Implement styling using SCSS while maintaining consistent design and UI standards.

  • Integrate front-end applications with REST APIs and backend services.

  • Collaborate with backend engineers to deliver end-to-end product functionality.

  • Participate in the modernization of legacy applications and help migrate existing features to modern front-end frameworks.

  • Maintain and improve existing codebases while ensuring scalability, performance, and maintainability.

  • Write and maintain unit and integration tests to ensure code quality.

  • Review code and provide constructive technical feedback to team members.

  • Debug and resolve production issues across the application stack.

  • Contribute to front-end architecture decisions and development best practices.

  • Participate actively in Agile ceremonies, including stand-ups, sprint planning, and retrospectives.

  • Create and maintain technical documentation.

  • Stay current with modern front-end development practices and tooling.

Qualifications

  • 5+ years of professional experience in software development.

  • Strong experience with React and modern JavaScript frameworks.

  • Proficiency in JavaScript and/or TypeScript.

  • Experience building UI using Material UI (MUI).

  • Strong experience with SCSS or modern CSS frameworks.

  • Experience integrating REST APIs into modern web applications.

  • Proficiency with Git version control.

  • Experience building responsive and user-friendly web applications.

  • Experience working in Agile development environments.

  • Strong collaboration and communication skills across engineering teams.

Nice to Have

  • Familiarity with ASP.NET WebForms and Razor templating.

  • Ability to read and understand C# code.

  • Experience with Gulp or similar asset pipeline tools.

  • Experience with testing frameworks such as NUnit or Jest.

  • Familiarity with Azure DevOps and NuGet.

  • Experience working in legacy modernization projects.

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