PAULO GONÇALVESFront-End Engineer
Native of Vila Nova de Gaia, Porto, Portugal.
With more than 20 years of professional experience, I am currently a Principal Front-End Engineer at Porto Tech Center - Jumia, focused on building scalable, high-performance web applications.
I lead front-end architecture, define technical direction, and promote best practices while leveraging modern frameworks and tooling.
Driven by performance and user experience, I collaborate across teams to deliver robust, user-centric solutions and tackle complex engineering challenges.
Professional Experience
Jumia Porto Tech Center
11 years 9 months
Principal Front-End Engineer
Oct 2022 – Present · 3 years 10 months
Porto, Portugal
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-...
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.
Engineering Manager / Lead Front-End Engineer
Sep 2021 – Oct 2022 · 1 year 2 months
Porto, Portugal
Led engineering teams across Jumia Mall — managed a full-stack team (1 FE + 2 BE + 2 Android + 1 iOS + 2 QAA + 1 PO) and a front-end team (4 FE + 1 QAE + 1 PO). Drove technical execution, code quality, and delivery timelines.
Lead Front-End Engineer
Jun 2020 – Aug 2021 · 1 year 3 months
Portugal
Lead Front-End Engineer for Jumia Mall. Architected front-end solutions, established best practices, and mentored junior engineers while delivering e-commerce features at scale.
Web Engineer (Senior Front-End Engineer)
Apr 2016 – Jun 2020 · 4 years 3 months
Porto, Portugal
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, Pr...
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.
Senior Front-End Developer
Nov 2014 – Apr 2016 · 1 year 6 months
Porto, Portugal
E-commerce solutions - front-end development for desktop and mobile foundation. Built with Node, Gulp, HTML5, SASS, BEM, JavaScript, jQuery, Ext JS, PHP, MySQL, and Solr.
Rocket Internet GmbH
2 years 6 months
Advanced Developer
Jun 2012 – Nov 2014 · 2 years 6 months
E-commerce solutions - front-end and back-end development. Worked with PHP, MySQL, JavaScript, jQuery, Ext JS, Zend Framework, Yii Framework, Solr, Nginx, Apache2, Memcache, and RabbitMQ.
Myone - Comunicação Multimédia
3 years 8 months
Multimedia Engineer
Oct 2008 – May 2012 · 3 years 8 months
Vila Nova de Gaia
Back-end and front-end development (PHP, MySQL, JSON, AJAX, JavaScript, jQuery, XML, CSS3, HTML5, Flash ActionScript 3.0). UI/UX design (Adobe Photoshop, Fireworks, Illustrator, Flash, Corel Draw). Project management.
Medula - Design de Comunicação
1 year 1 month
Web Designer | New Media Developer
Sep 2007 – Sep 2008 · 1 year 1 month
Vila Nova de Gaia
PHP, MySQL, JavaScript, AS3 developer. Interface and web designer. Project management.
Freelance
3 years 8 months
Freelance Web Developer/Designer
Jan 2004 – Aug 2007 · 3 years 8 months
Freelance web development and design projects. Full-stack development, client communication, and project delivery.
Core Competences
ℹ️ For more details, please visit my LinkedIn profile.