Senior Frontend/U Engineer

About The Opportunity

We are looking for an experienced UI Developer to design and develop modern, scalable, and high-performance front-end applications. You will work across React.js, Next.js, and Node.js technologies, collaborate closely with Product, UX, and Backend teams, and contribute to building robust solutions.

Responsibilities

• Develop advanced UI features using React.js and Next.js.
• Build reusable, scalable, and maintainable UI components following best practices.
• Understand how complex UX designs and business requirements translate into clean, responsive interfaces.
• Integrate the UI layer with backend services/APIs.
• Optimize application performance, accessibility (WCAG), SEO, and cross-browser compatibility.
• Perform code reviews and enforce standards.
• Collaborate with cross-functional teams to drive UI/UX improvements.
• Use Node.js for backend integration, tooling, and server-side logic where needed.
• Troubleshoot production issues, identify root causes, and implement fixes efficiently.
• Mentor junior developers, provide technical guidance, and foster best practices within the team.

Required Qualifications

• Advanced/Fluent English.
• Solid experience in UI/front-end development.
• Expert-level proficiency in: JavaScript (ES6+), React.js, Next.js, Node.js, HTML5 and CSS3.
• Strong hands-on understanding of React.js, including hooks/functional components, and state management, such as Redux or similar.
• Experience using RESTful API’s.
• Solid understanding of CI/CD pipelines, Git, and modern front-end build tools.

Nice To Have Skills

• Experience with CSS-in-javascript, such as styled-components.
• Experience with SSR concepts.
• Knowledge of headless CMS integrations
• Familiarity with UI test frameworks (Jest, React Testing Library, Cypress).
• Familiarity with Cloud services, such as Azure and GCP.
• Familiarity with GraphQL.
• Understanding of micro-frontend architecture and design patterns.

Avenue Code reinforces its commitment to privacy and to all the principles guaranteed by the most accurate global data protection laws, such as GDPR, LGPD, CCPA and CPRA. The Candidate data shared with Avenue Code will be kept confidential and will not be transmitted to disinterested third parties, nor will it be used for purposes other than the application for open positions. As a Consultancy company, Avenue Code may share your information with its clients and other Companies from the CompassUol Group to which Avenue Code’s consultants are allocated to perform its services.