Joao Melo

Frontend Engineer with 4 years of experience developing high-performance web interfaces using React, Next.js, and TypeScript. Proud to have delivered global projects for top-tier brands like L'Oreal Paris, Sanofi, and Veio Resorts. Basic full-stack foundation with Node.js, Express, SQL, and Prisma ORM.

Frontend Engineer (AdTech & Creative Automation) at Innovid (2025-06 – 2026-04)

• Scaled global DCO (Dynamic Creative Optimization) campaigns across 15+ countries for brands like Patagonia, implementing a manifest-driven logic architecture and Spreadsheet versioning.
• Achieved sub-1s load times and 300kb K-weight limits using a modular Vanilla JavaScript engine, using code-splitting and font subsetting.
• Implemented a hybrid development approach using Vanilla JS for performance and React + Vite for high-complexity interactive ads, building a reusable component library.
• Ensured 100% visual integrity in Grids and Animated Feeds using GSAP (GreenSock) and CSS Flexbox/Grid, supporting multiple languages and localizations.
• Collaborated with Global teams via Agile/Scrum and Jira, maintaining strict version control and code reviews with Git/GitHub.
• Tech Stack: React, Vite, Vanilla JavaScript, GSAP, Node.js, Git, GitHub, Jira, CSS Animations, Agile/Scrum.

Frontend Engineer | React & Next.js Developer at Valtech (Global IT Consultancy) (2022-03 – 2025-03)

Focused on technical immersion and mastery of the Sitecore CMS ecosystem as a Content Manager for 6 months, managing data administration and component molding with HTML & CSS; subsequently transitioned to a Frontend Developer role specializing in Next.js and Headless architectures.

• Developed a Smart Component-based quiz for Maybelline, implementing cross-referenced dynamic data and question logic via the Sitecore Layout Service API and Context API. This architecture delivered real-time personalized recommendations, increasing user engagement by 25% during the launch month.
• Collaborated on the technical refactoring and migration of the Mandarin Oriental Hotels global sites, evolving components and logic across versions in Next.js / Sitecore JSS. Ensured visual consistency, localization (i18n), and performance optimization (Code Splitting, Lazy Loading, and Core Web Vitals) for 20+ international markets.
• Awarded 'Valtech Star' (3x consecutive) for above-average productivity and teamwork performance. Managed the technical onboarding of new team members, facilitating mastery of the Sitecore CMS platform and ensuring accurate component and data implementation.
• Tech Stack: React, Next.js, TypeScript, Sitecore XM Cloud, Sitecore JSS, Context API, React Hooks, i18n, Code Splitting, Lazy Loading, Core Web Vitals, GSAP, Git, Jira, Agile/Scrum.

Bachelor of Business Administration in BBA – UEL – Universidade Estadual de Londrina (2016-03 – 2021-03)

Advanced English Certificate in English Language and Literature – Wizard by Pearson (2009-02 – 2015-12)