
Aäron De Pauw
Verified Expert in Engineering
Full-stack Developer
Antwerp, Belgium
Toptal member since November 10, 2022
Aäron is a full-stack developer and designer with 10+ years of experience using JavaScript and PHP. He is passionate about front-end development and specializes in React and React Native. From quick prototypes to extensive and complex experiences, he analyzes projects in detail, listens to client needs carefully, and delivers a finished product with the best possible stack. Aäron enjoys freelancing, always taking projects to the next level.
Portfolio
Experience
- PHP - 13 years
- MySQL - 11 years
- JavaScript - 10 years
- CakePHP - 9 years
- React - 7 years
- React Native - 6 years
- Firebase - 5 years
- Redux - 2 years
Preferred Environment
JavaScript, PHP, CakePHP, Redux, MySQL, Expo, React Native, React, Telegram Bots, Animation
The most amazing...
...job I've performed is managing people, writing code, and consulting on development and design as the front-end developer of VRT, a media company in Belgium.
Work Experience
Full-stack Mobile Developer
Rian Maurer
- Developed Medguide, a cross-platform React Native application that provides fast access to FDA Prescribing Information (PI), enabling users to search medications by name, brand, or NDC code and instantly retrieve official drug documentation.
- Designed and implemented an optimized search architecture using FDA OpenFDA datasets, reducing medication lookup times and allowing users to quickly navigate prescribing information with advanced filtering and in-page search capabilities.
- Architected the complete product experience, including onboarding, subscription management, favorites, advanced search, and FDA document viewing, delivering a production-ready MVP for iOS and Android using React Native, TypeScript, and Supabase.
- Implemented subscription-based monetization, user authentication, favorites synchronization, and cloud-backed search infrastructure, preparing the application for App Store and Google Play release.
React Native Mobile Developer
Grit Rebels B.V.
- Built a secure digital vault application React Native and Swift, enabling users to store thousands of photos and documents with end-to-end encryption.
- Optimized image processing and storage workflows, reducing load times and improving application responsiveness for large media libraries.
- Developed encrypted cloud backup and synchronization features, ensuring secure access to files across multiple iOS devices.
- Implemented PIN-based authentication, significantly increasing account security and protecting sensitive user content.
Senior Full-stack Mobile App Developer
Ponder Fitness LLC
- Designed and built an AI-powered class recommendation system, generating personalized feeds using vector embeddings and cosine similarity across 1,000+ fitness classes.
- Integrated Google Places data with a proprietary class database, enabling real-time discovery while persisting normalized records for long-term analytics and ranking.
- Implemented scalable back-end APIs with FastAPI and Supabase, supporting explore, likefeed, trending, leaderboards, and people-you-may-know features.
- Developed a review-driven ranking engine, combining recency, review volume, proximity, and user behavior to dynamically score and surface trending classes.
Full-stack Developer
Reseters Limited
- Implemented a risk assessment pipeline using Python and GeoJSON to classify plots by greenbelt, brownfield, flood zones, and conservation area, reducing manual research time by over 90%.
- Engineered a data scraping system with Puppeteer that extracted over 100,000 UK land plots with structured metadata, image URLs, lat/lng, and pricing, syncing directly to Supabase.
- Wrote and deployed a complete “vision-to-build” funnel including UI, AI APIs, and back-end logic, helping convert basic user preferences into professional-grade architecture previews and reports.
React and Angular Developer
Lungta
- Developed the dashboard and web app for Lungta, an eco-friendly delivery service in France known for its high-quality, sustainable approach.
- Collaborated closely with the back-end team and integrated the API into a React Next.js application.
- Refactored the existing Angular setup, transitioning it to a React Native and Next.js environment.
React Native Developer
LocalOTG LLC
- Built an app that links travelers with locals. Integrations like chat, notifications, admin, and more were included.
- Published the app in the App Store and set up the notifications service (Node.js).
- Developed an admin where the client can manage all the app data (e.g., users, notifications, travelers).
Full-stack Developer and Designer
Freelance Clients (Ari)
- Crafted the Buddii platform using React and Firebase, offering a cutting-edge solution that generates valuable data from slideshows, ultimately assisting clients in boosting their sales.
- Contributed to Aurum, a fitness app in React Native with a React/Firebase back end that serves as a bridge between clients and coaches, offering a range of sophisticated features, including chat, timers, an extensive exercise database, and forms.
- Spearheaded the design and development of the SaaS B2B platform for Cocom. Cocom operates as a rental platform, much like Airbnb, but with a focus on individual spaces and rooms rather than entire buildings.
- Served as a digital creative for numerous talented artists, including, among other influencers, Tom Waes (a presenter), Matthias Schoenaerts (a Hollywood actor), Makasi (DJ), and Erko Jun (Sport).
- Created software for a well-known coffee brand in Thailand, Red Diamond. The brand powers the brand's vending machine. Using a custom-developed app, customers can easily place orders and conveniently retrieve their selected products from the machine.
- Created an online campaign for the "Undercover" TV show, exemplifying the power of shared purpose. With our extensive network, we created a huge online experience. The result was an engaging online game that resonated with over 15,000 participants.
- Managed the design and front-end development for projects at Jorissen & De Jonck, a recruitment and selection agency based in Antwerp. They specialize in serving companies and candidates in the engineering, construction, and financial sectors.
Senior Full-stack Developer
De Mensen
- Created and built the primary website for De Mensen, a production company specializing in video content production for major broadcasters such as Netflix, VRT, Medialaan, and others.
- Developed and designed an intranet system using CakePHP, CouchDB, and jQuery. This system is still actively used for various functions, including reservations, invoice management, and meal ordering.
- Had the privilege of kickstarting one of Belgium's most-watched TV shows. Eén and VTM joined forces with presenters Tom and Koen for various challenges. The audience determined the challenges, resulting in a flood of ideas.
- Engineered the complete voting system, set up the servers, and designed the interface for Night of the Stars, the prestigious Belgian award celebrating excellence in TV and film.
Lead Front-end Developer
VRT
- Elevated digital presence for VRT, Belgium's top TV network: StuBru, MNM, Eén, Radio 1, Radio 2, Klara, and more.
- Collaborated with the team at MNM.be, one of Belgium's largest radio stations, where I handled the development of their primary website and numerous campaigns that attracted thousands of daily visitors.
- Empowered StuBru's impactful campaigns, engaging 780,000 daily listeners and 1 million monthly web visitors. Led web development for Belgian audience.
- Revamped Radioplus back end API, fueling VRT Belgium's prime radio app, radioplus.be, serving a substantial user community.
Back-end Developer
DPG Media
- Played a pivotal role in reimagining the digital television experience by overseeing the design and development of Stievie, a groundbreaking app for live TV streaming and movie content.
- Worked in collaboration with Belgian TV channels, harnessing the power of API calls to seamlessly curate a comprehensive TV Guide, deliver tailored advertisements, and stream digital video content.
- Pioneered the prototype, which served as the foundation for the beloved final app embraced by millions of users.
Back-end Developer
Mia Interactive
- Developed the database and management system for Diamonds in Antwerp using Symfony 2 with Composer, Twig, and SCSS.
- Built little websites in CakePHP with MySQL, designing in Sketch, Photoshop CC, and Illustrator CC.
- Made many websites for small clients, like bookstores, in Drupal with a team of one developer and one designer.
- Created my first app in PhoneGap and jQuery with a custom map for Kolonies, a route in the Belgian hills with a fascinating history.
Web Developer
Sevenedge
- Handled projects like plopsa.be and campaigns for Volvo and mcdonalds.be, mainly using Drupal, CakePHP, and Flash.
- Created custom modules, translations, and many more for McDonalds and Plopsa, working in Drupal and leveraging my PHP knowledge.
- Led several campaigns and mini-websites with CakePHP and MySQL, which became my preferred framework in the upcoming years.
- Built banners for campaigns, mainly for Volvo, which were later exhibited on several Belgian websites.
Experience
PixSafe App
https://pixsafe.app/Hide your photos. Your eyes only. Unlike other vault apps, Pixsafe never uploads a single photo anywhere. Everything stays on your device, protected by AES encryption and a secure PIN. It's privacy the way it should be — truly private.
Ponder - AI-powered Fitness Class Discovery
https://apps.apple.com/us/app/ponderfit/id6752879800Medguide - Your Trusted Guide to Medications
https://play.google.com/store/apps/details?id=com.materialabs.medguideQuickly find medications by generic name, brand name, or NDC code, then explore key details such as indications, dosing, warnings, contraindications, side effects, drug interactions, and storage information. Powerful search tools and in-page navigation help you locate the exact information you need in seconds.
Save frequently referenced medications to your favorites, browse by category, and access comprehensive prescribing information through a clean, intuitive interface built for speed and clarity.
Whether you’re studying, researching, or looking up medication information during a busy day, Medguide puts trusted FDA drug data at your fingertips.
AI-powered Real Estate Platform for UK Plot Discovery & Risk Assessment
https://6clicks.ukLocalOTG
I created the admin panel using React and built the mobile app with React Native (Expo). The back-end services were implemented using Express.js (Node.js) to handle notifications, and Firebase Firestore was utilized for back-end data management and authentication. The technologies used in this project include React, React Native (Expo), Express.js (Node.js), and Firebase Firestore.
G4U - Groceries Shopping
https://apps.apple.com/pl/app/g4u/id6745099847The project combines seamless user experience with powerful back-end logic, including:
Front end: React Native
Back end: Supabase (PostgreSQL, Auth, Storage)
AI integration: OpenAI for receipt interpretation
Receipt scanning: Google Cloud Vision API
Payments: Stripe and Apple in-app purchases
State management: Zustand
UI: Tailwind-style utilities and Feather icons
Other tools: Mapbox (for location-based promotions), custom product matching logic, and fuzzy search algorithms
G4U delivers a clean, user-friendly experience with real-time syncing, product insights, and personalized shopping features.
Casting Platform for Child Talent Agencies with Supabase & React
https://www.kidscasting.be/Buddii Platform
User: john.doe@mail.com
Pass: r8!gNtB7!D@@
Coupeza
Aurum App
Aurum was developed using a combination of cutting-edge technologies, including React Native, Redux, TypeScript, Firebase, and SaaS. The mobile app itself was built using React Native, ensuring a smooth and responsive user experience. Redux was utilized for efficient state management, TypeScript for enhanced code quality and maintainability, Firebase for back-end services and data storage, and SaaS for further scalability and ease of deployment. Additionally, the dashboard for managing the application was created using React, providing coaches with a user-friendly interface for managing their clients and their fitness plans.
MNM Website
https://mnm.be/The website was built using Angular, providing a robust and scalable framework for developing a seamless user experience. The back end processes data using Drupal, utilizing its powerful capabilities and REST API integration. The campaigns for MNM were crafted with industry-leading design software such as Adobe CC (Photoshop, Illustrator), Sketch, or Figma, allowing for visually captivating designs. The development aspect of these campaigns involved using a combination of React, PHP, or Angular, depending on the specific requirements and project scope.
Overall, my involvement in MNM's projects encompassed delivering high-quality front-end development for their website, leveraging Angular and Drupal to process data effectively, and collaborating with various design software to create visually compelling campaigns.
StuBru Website
https://stubru.be/The website itself was developed using Angular, a powerful and flexible framework that enables the creation of dynamic and responsive user interfaces. In conjunction with Angular, the back-end data processing was facilitated by Drupal, which effectively manages and serves data through its REST API integration.
Skills
Libraries/APIs
React, jQuery, Node.js, REST APIs, React Navigation, React Redux, Vue, Google Maps, React Native for Web, Camera API, Web3.js, Stripe API, Telegram Bot API, Telegram Messenger API, Social Media APIs, Facebook API, API Development, Web API, OpenAI API, Google Maps API, Chart.js, Google API, Stripe, Socket.IO, JavaScript Charting, Puppeteer, AES
Tools
Figma, Expo, Git, GitHub, Webpack, ChatGPT, Bitbucket, Expo.io, Firebase Authentication, Claude Code, Flash, Composer, Photoshop CC, Sketch, Illustrator CC, Adobe CC, Google Analytics, Jira, Confluence, Elastic, Cinema 4D, Vectary, Apache, Mailchimp, JavaScript Testing, Postman, Google Vision AI
Languages
JavaScript, PHP, TypeScript, CSS, HTML, HTML5, Python, Less, SQL, Python 3, SCSS, Sass, TypeScript 3, GraphQL, ECMAScript (ES6), Swift
Frameworks
React Native, Laravel, Next.js, Angular, Yarn, Nuxt.js, CakePHP, Redux, Flutter, Tailwind CSS, Symfony, Twig, PhoneGap, AngularJS, CakePHP 2, Symfony 4, Bootstrap, Vuetify, Express.js
Paradigms
Mobile Development, UI Design, Search Engine Optimization (SEO), API/Services Architecture, Microservices, UX Design, Hosting, REST, Marketplace Platforms, SMACSS
Platforms
Firebase, Webflow, Mobile, DigitalOcean, Web, iOS, Android, Amazon Web Services (AWS), Google Cloud Platform (GCP), WordPress, Vercel, Drupal, Linux, Debian, Shopify, AWS Lambda, Mapbox
Storage
MySQL, JSON, Databases, NoSQL, MongoDB, PostgreSQL, Google Cloud, Cloud Deployment, CouchDB, Cloud Firestore, Amazon DynamoDB, Redis
Industry Expertise
Web Design, AI Art Generator
Other
Web Development, APIs, Front-end, User Experience (UX), User Interface (UI), Cloud Storage, Full-stack, Mobile Apps, Firebase Cloud Functions, Full-stack Development, MVC Frameworks, Front-end Development, SEO Tools, Architecture, Web Hosting, Front-end Design, Progressive Web Applications (PWAs), Single-page Applications (SPAs), Back-end Development, HTML5 Banners, Adaptive Design, Front-end Architecture, Supabase, Development, Single Sign-on (SSO), CTO, App Store, Stripe Subscriptions, Stripe Payments, Strapi, Real-time Data, SaaS, Location Services, Live Chat, Dating Apps, Internet of Things (IoT), CRM APIs, API Integration, Customer Relationship Management (CRM), Mobile First, Cloud Platforms, Artificial Intelligence (AI), Data Visualization, Startups, Accessibility, Videos, Headless Commerce, Google Analytics 4 (GA4), Google Tag Manager, WebSockets, CI/CD Pipelines, Machine Learning, Mobile UX, Web App Development, Web UX, Web UI, Web Applications, Mobile Applications, OpenAI, Mobile App Development, Telegram Bots, TikTok, Animation, SDK Development, Software Development Toolkits (SDK), SDKs, Cross-platform App Development, Large Language Models (LLMs), Product Design, OAuth, PostgreSQL 9, AI Tools, Integration, Push Notifications, Activity Feeds, Mobile GPS, Social Media Apps, GPS, Communication, Payment APIs, Location Tracking, Waterfall Methodology, Apollo, Web3, Cryptocurrency Wallets, Natural Language Processing (NLP), Algorithms, Generative Pre-trained Transformers (GPT), Retrieval-augmented Generation (RAG), Vector Data, GeoJSON, Supabase Auth, Zustand, FastAPI, Google Play Store, Encryption, Gemini
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