Products I've shipped

Architecture

A local-first desktop and Android app built on Tauri 2 with a Rust core over SQLite, so the register runs entirely offline. A delta-sync engine reconciles to Supabase (PostgREST), and a zero-config LAN fallback (Axum WebSocket + mDNS + self-signed TLS) keeps multiple terminals in sync with no server. Shipped as v1.11.4 across Windows, macOS, Linux, and Android.

Problems solved

• Shops needed a register that keeps working fully offline and across multiple devices.
• Arabic RTL receipts and UAE ZATCA e-invoicing compliance were hard requirements.
• A single codebase had to ship to Windows, macOS, Linux, and Android.

Key achievements

• Local-first SQLite core with a delta-sync engine to Supabase, plus a zero-config LAN sync fallback (Axum WebSocket + mDNS + self-signed TLS).
• ESC/POS thermal printing with Arabic RTL text shaping via HarfBuzz in Rust, supporting 58mm and 80mm printers on every platform.
• UAE ZATCA / FTA e-invoicing pipeline: UBL 2.1 XML, TLV QR codes, SHA-256 invoice hashing, and per-item VAT.
• 7-role × 84-permission RBAC enforced independently on the React frontend and on every Rust Tauri command.
• Signed CI/CD auto-update pipeline (GitLab Pages CDN, multi-arch GitHub Actions) plus Lemon Squeezy subscriptions, auto-backup, and Excel import/export.

Architecture

A statically generated Gatsby frontend with an MDX + KaTeX pipeline that renders physics and chemistry equations across the full national curriculum. An AWS serverless backend — Cognito auth, AppSync GraphQL, and DynamoDB — powers real-time sync, wrapped in an offline-capable PWA. Built during COVID and maintained for five years (150+ lessons, 500+ exercises).

Problems solved

• COVID meant students needed the entire curriculum accessible online.
• Physics and chemistry content required reliable equation rendering at scale.
• Non-technical authors needed to publish lessons without redeploying.

Key achievements

• MDX + KaTeX rendering pipeline covering the Scientific, Literary, and Technical-Mathematics streams.
• AWS serverless backend: Cognito (email + Google/Facebook OAuth), AppSync GraphQL, and DynamoDB.
• In-browser Editor.js lesson editor, timed gamified quizzes, and a progress-tracking student dashboard.
• Offline PWA, QR-code exercise sharing, a multilingual Arabic RTL / French / English UI, and full SEO.

Architecture

A recipe-saving web app designed and built front to back as a self-directed learning project — taken from concept to a live, working product. The project that launched my development career.

Problems solved

• Learning to design and ship a complete web app end to end, solo.
• Turning a self-taught curriculum into a real, usable product.

Key achievements

• Built the full application front to back as a self-directed learning project.
• Shipped it from concept to a live, working web app.