Senior Fullstack Developer

Description

Senior Fullstack Developer About the position You will join the team responsible for the Backend that serves the product's frontends, as well as 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 also an important space for experimentation, product evolution, and understanding user behavior. We are looking for a collaborative individual with analytical thinking and a strong focus on quality, capable of working both on the frontend and backend, directly contributing to technical evolution, performance, and user experience. **Requirements:** Responsibilities Your day-to-day responsibilities Develop solutions focused on delivering the best possible experience for end users Collaborate closely with developers, designers, QA engineers, and stakeholders Actively participate in solving complex problems Identify opportunities for improvement and propose innovative solutions Write clean, reusable, and maintainable code Ensure test coverage and delivery quality 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 Technical Requirements Frontend **Solid knowledge of:** HTML5 CSS3 JavaScript React **Experience with:** Responsive design Media Queries Flexbox CSS Grid **Knowledge of:** Redux SPAs Server Side Rendering (SSR) Backend Solid knowledge of Node.js and npm Experience building and consuming RESTful APIs Knowledge of Express.js Familiarity with microservices architecture Knowledge of GraphQL, preferably Apollo Best Practices and Architecture **Knowledge of Design Patterns:** Creational Structural Behavioral **Mastery of best practices:** SOLID DRY KISS Separation of Concerns (SoC) Ability to write clean and scalable code Testing and Quality Experience with unit testing in JavaScript Quality-oriented culture and code review practices **Knowledge of lint/hint tools:** ESLint Version Control and DevOps Solid knowledge of Git Experience with CI/CD Familiarity with GitLab CI Knowledge of software delivery via PaaS and the 12-Factor App principles Monitoring and Performance Familiarity with monitoring tools Tracking performance and error metrics Analytical ability to identify bottlenecks and anomalies Soft Skills Collaboration Teamwork Strong communication skills Ease of interaction with multidisciplinary teams Proactivity Analytical mindset Continuous pursuit of improvements Ability to work autonomously Ownership Sense of responsibility for deliverables and quality Commitment to the product’s continuous evolution Communication Clear and concise communication Active participation in technical discussions Nice-to-Haves Experience with high-scale architecture Knowledge of observability and advanced monitoring Experience with high-traffic applications Hands-on experience with microservices in distributed environments Knowledge of frontend and backend performance optimization Experience with digital media and streaming products Benefits Hybrid (2 days per week)