PAULO GONÇALVESFront-End Engineer

Expertise in delivering scalable, high-performance applications across SPA, SSR, and CSR architectures. Specialized in semantic HTML5, accessibility (A11y), SEO, and styling systems with SCSS, CSS-in-JS, Utility CSS, Atomic BEM, TailwindCSS, shadcn-u...

Expertise in delivering scalable, high-performance applications across SPA, SSR, and CSR architectures. Specialized in semantic HTML5, accessibility (A11y), SEO, and styling systems with SCSS, CSS-in-JS, Utility CSS, Atomic BEM, TailwindCSS, shadcn-ui, and Radix UI. Extensive experience in JavaScript (ES6+) and TypeScript, with deep knowledge of React 19, Next.js 15, and Preact for lightweight, high-performance UI development. Skilled in state and data management with Zustand, Unistore, TanStack (React Query, Router, Table), nuqs, React Hook Form, Zod, Dice Table, cmdk, and kbar. Designed modular architectures with Module Federation, Turborepo, Turbo, Vite, Vitest, Vite-plugin-federation, Rollup, and Webpack. Delivered backend integration with Express.js, PostgreSQL, and Prisma ORM. Ensured reliability and maintainability with testing and QA: Jest, Testing Library, Puppeteer, Playwright, Vitest, Lighthouse, Axe, and Autocannon. Maintained strict code quality standards with ESLint, StyleLint, Prettier, Husky, Lint-Staged, Knip, Renovate, Dependabot, and CSpell. Implemented observability, monitoring, and logging with Sentry, Winston, Prom-client, New Relic, Grafana, and OpenSearch. Automated CI/CD pipelines with GitHub Actions, Jenkins, Rundeck, Docker, pnpm workspaces, npm, and Yarn. Validated compatibility across browsers and devices using BrowserStack. Integrated analytics and ad-tech ecosystems including GA4, GTM, Clarity, AdManager, MoEngage, Mabaya, Mirakl Ads, Facebook Conversions API, Google Ads, Verbolia, ThreatMetrix, Sprinklr, Modiface, Leaflet, and qeen.ai. Enhanced user experience with Recharts, Storybook, and SVG sprites, while streamlining workflows with VSCode, Windsurf, JetBrains WebStorm/PHPStorm, Sublime, Linux (Ubuntu), and AI-assisted coding (Copilot, Gemini, Cascade, Claude). Proven ability to deliver modern, modular, and performant platforms with a focus on accessibility, resilience, and scalability.

Front-end and back-end development of e-commerce solutions for desktop and mobile (including Opera Mini). Built micro-services clients, Jumia Blog, and Jumia Group website. Worked with JavaScript, ECMAScript 5/6, AngularJS (1/2/4), React, Redux, Prea...

Front-end and back-end development of e-commerce solutions for desktop and mobile (including Opera Mini). Built micro-services clients, Jumia Blog, and Jumia Group website. Worked with JavaScript, ECMAScript 5/6, AngularJS (1/2/4), React, Redux, Preact, SSR, Webpack, PWA, Service Workers, AMP, SASS, BEM, Node, Gulp, PHP, MySQL, and Docker.