Senior ReactJS Developer (NestJS)

Senior ReactJS Developer (NestJS)

Sao Paulo, Brazil (Hybrid)

Long term Contract

Description:

We are seeking a highly skilled and experienced Senior UI Developer with a strong background in ReactJS, Next.js, TypeScript, and Unit Testing. The ideal candidate will have a proven track record of building scalable, responsive, and high-performance web applications. This role requires a collaborative mindset, attention to detail, and the ability to lead UI development initiatives from concept through execution.

Key Responsibilities:

• Develop and maintain modern, scalable front-end applications using ReactJS and Nestjs.

• Write clean, efficient, and well-documented code using TypeScript.

• Implement unit testing frameworks (e.g., Jest, React Testing Library) to ensure robust code quality.

• Optimize application performance, scalability, and user experience.

• Collaborate with UX/UI designers, backend developers, and product owners to deliver seamless user experiences.

• Review and mentor the work of junior developers to ensure adherence to best practices and coding standards.

• Participate in code reviews, architectural discussions, and agile ceremonies (e.g., sprint planning,

retrospectives).

• Stay current with front-end technologies and trends to drive innovation and best practices within the team.

Required Skills and Qualifications:

• 10+ years of overall software development experience.

• Strong expertise in ReactJS and NestJS frameworks.

• Proficient in Next.js, TypeScript and modern JavaScript (ES6+).

• Hands-on experience with unit testing tools and frameworks (e.g., Jest, Mocha, Cypress).

• Strong understanding of HTML5, CSS3, SASS/SCSS, and responsive web design.

• Familiarity with state management libraries such as Redux, Zustand, or Recoil.

• Experience with RESTful APIs, GraphQL, and client-server integration.

• Knowledge of CI/CD pipelines and version control systems (e.g., Git, GitHub, GitLab).

• Excellent problem-solving skills and attention to detail.

• Strong communication and collaboration skills.