Senior Fullstack Developer

Cadmus Soluções em TI

Fullstack Developer responsible for backend solutions supporting product front-end interactions in a high-performance environment. Collaborating with teams to enhance user experience and product evolution.

Posted 5/16/2026full-timeRio de Janeiro • 🇧🇷 BrazilSenior💰 R$12,000 per monthWebsite

Tech Stack

Tools & technologies

ApolloGraphQLJavaScriptNode.jsReactRedux

About the role

Key responsibilities & impact

You will be part of the team responsible for the backend that serves the product front-ends.
The application responsible for the platform's web experience.
The environment features a high-performance, scalable, and resilient architecture.
Supporting a large volume of concurrent users.
The web application is an important space for experimentation, product evolution and understanding user behavior.
Develop solutions focused on delivering the best end-user experience.
Work collaboratively with developers, designers, QA and stakeholders.
Actively participate in solving complex problems.
Identify improvement opportunities and propose innovative solutions.
Write clean, reusable, and maintainable code.
Ensure test coverage and quality of deliveries.
Participate in code reviews as both author and reviewer.
Monitor application health and performance metrics in production.
Investigate incidents and propose continuous improvements.
Contribute to the evolution of application architecture, performance and scalability.

Requirements

What you’ll need

Strong knowledge of HTML5
CSS3
JavaScript
React
Experience with responsive design
Media Queries
Flexbox
CSS Grid
Knowledge of Redux
SPAs (Single-Page Applications)
Server-Side Rendering (SSR)
Node.js
npm
RESTful APIs
Express.js
Microservices architecture
GraphQL, preferably Apollo
Knowledge of Design Patterns: Creational
Structural
Behavioral
Strong command of best practices: SOLID
DRY
KISS
Separation of Concerns (SoC)
Unit testing in JavaScript
Quality-focused culture
Code review
Lint/hint tools: ESLint
Git
CI/CD
GitLab CI
PaaS
12-Factor App
Monitoring tools
Tracking performance metrics
Analytical skills

Benefits

Comp & perks

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Hard Skills & Tools

HTML5CSS3JavaScriptReactReduxNode.jsRESTful APIsExpress.jsGraphQLUnit testing

Soft Skills

collaborationproblem-solvinginnovationcode reviewanalytical skills