Matthieu O.
Full-Stack developer, Hybrid Mobile apps, SAAS, Shopify App
Hey there! I'm Matt, new to Upwork, and based in Ireland. With over 20 years of experience in software development, I specialize in building scalable SaaS platforms, cutom web applications, and mobile apps (React Native). 💡 What I Bring to the Table: ✔ Mobile Development – React Native & Expo for iOS & Android apps ✔ Backend & Full-Stack Development – PHP, NodeJS, Python ✔ Front-End Expertise – JavaScript (React, Vue.js, D3.js), HTML, CSS, Tailwind CSS, Bootstrap ✔ Data Visualization & Analytics – D3.js ✔ Database Management – PostgreSQL, Supabase, MySQL ✔ Linux & Server Administration – Deploying and managing cloud-based apps ✔ Deploying – Digital Ocean, Vercel ✔ Data Scrapping & automatisation – Puppeteer, Playwright ✔ Custom Shopify Apps (RemixJS) 👨💻 Past Projects Include: Mobile apps: 🔹 Building a mindfulness mobile app (iOS & Android) - Mindful Moments 🔹 Building an iOS tracking exercises mobile app - RepTrack 🔹 Building a reminder mobile app with very accurate sync for notifications (iOS & android) - To Future me 🔹 Building an iOS Binaural Beats mobile app Saas & custom development: 🔹 Developing custom apps (booking systems, custom development) 🔹 Custom web app (diary) for a Hotel Restaurant to manage their bookings (events & weedings) 🔹 Affiliation Platform (SaaS) in Canada - 3 different dashboards & transaction tracking solutions 🔹 Collaborating on software solutions for care centers and enterprise clients 🔹 Shopify app to track affiliate links and data dashboard 🔹 Shopify app to build a XML custom product feed 🔹 Creating social media analytics dashboards with interactive data visualizations Websites & E-commerce: 🔹 Migrating a big fashion brand e-commerce website & POS to Shopify 🔹 Building a jewellery website with Woocommerce (wholesale & direct to consumers) 🔹 Building a gift ideas websites in Wordpress 🔹 Building a gift ideas quote system for corporate gifts in Woocommerce I'm resident in Ireland for the past 8 years. Fluent in English & French, I have worked in Canada, Ireland, and France, bringing a global perspective to development. Whether you need an MVP, SaaS platform, or a custom web or mobile solution, I’m ready to bring your ideas to life. 📩 Let’s discuss your project and turn it into reality!
Earnings and projects
Last 6 months ÷ 2.7 months active (since Aug 2026)
Last 6 months: $2k
$2k in the last 6 months
Earnings, last 30 days
Skill rankings: Top 8% in Script
Ranked by MRR among everyone on Upwork with the skill.
- #22Remix158 freelancers · 🇮🇪 #1Top 14%🇮🇪#1 of 1
- #54Script701 freelancers · 🇮🇪 #1Top 8%🇮🇪#1 of 2
- #251Hybrid App Development1,431 freelancers · 🇮🇪 #1Top 18%🇮🇪#1 of 2
- #474App Development2,592 freelancers · 🇮🇪 #1Top 18%🇮🇪#1 of 3
- #652Shopify Apps3,368 freelancers · 🇮🇪 #1Top 19%🇮🇪#1 of 4
- #1,044Supabase4,116 freelancers · 🇮🇪 #2Top 25%🇮🇪#2 of 6
- #1,106Vue.js8,267 freelancers · 🇮🇪 #2Top 13%🇮🇪#2 of 7
- #1,516Web Application9,341 freelancers · 🇮🇪 #3Top 16%🇮🇪#3 of 8