Full Stack Engineer

**Full Stack Developer – São Paulo (Hybrid \- three days in office)** **Employment Type:** 1\-Year Contract **Seniority Level:** Associate **Industry:** IT Services \& Consulting / Technology / Information \& Media **Role Overview** We’re looking for an experienced **Full Stack Developer** to build and maintain tools and infrastructure for UX workflows. This position combines **hands\-on engineering** with strong cross\-functional collaboration. **Key Responsibilities** * **Prototyping:** Develop high\-fidelity, interactive prototypes using Polygon Studio for user feedback. * **Asset \& Template Management:** Create and maintain shared asset repositories and design templates. * **Component Library Development:** Build reusable UI components in Lit/React for efficiency and consistency. * **Collaboration \& Communication:** Work closely with stakeholders, including design, sales, and operations teams, on requirements and project updates. * **Technical Implementation:** Ensure cross\-browser compatibility, performance, and write clean, documented code. * **Platform Expertise:** Develop deep knowledge of the Polygon platform. * **User Onboarding \& Support:** Provide support and guidance to new users on the Formats Infrastructure. * **Advertisement Campaign Support:** Collaborate with internal teams to design and implement advertising features/campaigns aligned with product goals. * **Operations Enablement:** Partner with operations teams to streamline deployment, process workflows, and performance monitoring of delivered solutions. **Required Skills \& Experience** * **Minimum 5 years’ experience** in Full Stack Development (mandatory). * **Mandatory experience in Advertisement and Operations** environments, with a proven ability to work cross\-functionally to deliver integrated solutions. * Proficiency in front\-end development (HTML, CSS/SASS, JavaScript/TypeScript). * Experience with modern web frameworks (e.g., Angular, React, Lit). * Skills in building responsive component libraries. * Ability to develop high\-fidelity interactive prototypes. * Experience with design systems (e.g., Material UI). * Knowledge of version control and collaboration tools (e.g., Git). * Understanding of UX principles and user\-centered design. * Experience with AngularJS applications (single\-page, complex data\-driven interfaces). * CSS proficiency (Bootstrap, Tailwind CSS, SASS, LESS). * Full stack development capabilities (Node.js, Python, Java, .NET). * Database knowledge (SQL, NoSQL). * **Proven sales experience** and ability to collaborate with sales teams to understand client needs and support solution selling.