Firas S.

Senior full-stack developer and tech lead with 15 years of experience, Top Rated with a 100% Job Success Score. I design, build and maintain custom web platforms and mobile apps for businesses in Switzerland, the US, the UK and Canada, and I own the work end-to-end: scoping, architecture, delivery and long-term support. WHAT I BUILD - SaaS platforms and business back offices in PHP (CodeIgniter 4), with REST and GraphQL APIs on MySQL or PostgreSQL - WordPress and WooCommerce: custom plugins and themes, multi-store setups fed by one central product catalog (PIM), payment and shipping integrations - Mobile apps: React Native / Expo, native Android (Kotlin, Jetpack Compose) and Ionic / Capacitor, including apps published on Google Play - Front-ends in Vue.js, TypeScript and JavaScript, with Node.js where it fits - Payments: Stripe (Connect, Terminal / tap to pay, subscriptions), PayPal, Square and crypto gateways - Data and BI: ELT pipelines, PostgreSQL data warehouses and Metabase dashboards - AI features with the OpenAI, Claude and Gemini APIs: product matching, content generation, classification and workflow automation - Accounting and ERP: FrontAccounting customization, QuickBooks migration, Zoho Books integration SELECTED WORK (see my portfolio) - Multi-tenant restaurant POS platform: web admin plus Android POS, kitchen display and self-order kiosk, with Stripe card payments, offline mode and real-time sync - Field-workforce platform with iOS and Android apps: GPS-geofenced clock-in, QR task scanning and push notifications - Multi-channel BI warehouse and management dashboards for a retail group - PIM and operations back office syncing one catalog to several WooCommerce stores - An offline budgeting app and a hands-free voice check-in app for Android - Live-auction marketplace with crypto payments, and a custom accounting system migrated from QuickBooks HOW I WORK I work solo or inside a team, as lead or contributor, and I'm comfortable running several projects in parallel. I write a short spec before building, test what matters, and use AI-assisted workflows (Claude Code, Antigravity) to move faster while staying hands-on with the code that ships. Several of my clients have worked with me for years: I prefer long-term partnerships to one-off builds. Send me your brief and I'll tell you honestly how I'd approach it, what it would take, and where I can help.