Hayyu

Overview

Hayyu Skin Clinic is a women-exclusive beauty clinic chain operating across Indonesia (Surabaya, Sidoarjo, Malang, Jakarta, and more), known for its International Smart Skin Technology (ISST) treatments. The digital platform I built powers the entire online presence and internal operations: a public-facing marketing site, a reservation system, an admin panel for clinic staff, a skincare e-commerce storefront, and the HayyuDoc companion app available on Play Store and App Store.

Media assets (treatment photos, before-after images, promotions) are stored and served at scale via Google Cloud Storage, keeping the platform performant across all branches.

What I built

• Online reservation system: patients select branch, treatment, date/time, and doctor; clinic staff manage queues and confirmations through the admin panel
• Patient profile and treatment history management — each patient's records, prescriptions, and before-after photos are tied to their account across all clinic visits
• Skincare e-commerce module: product catalogue, cart, order management, and inventory sync with clinic stock
• CMS for the marketing site: news, promotions, special offers, testimonials, and treatment listings managed by clinic marketing team without developer involvement
• HayyuDoc app backend API: powers the iOS and Android companion app for home skincare tracking, consultation booking, and product recommendations
• GCS-backed media pipeline: image upload, processing, and CDN delivery for all treatment and product imagery
• Multi-branch admin: branch managers see only their own data; head office has cross-branch visibility and reporting

Challenges

Syncing availability across multiple branches in real time — so a patient booking online sees accurate slot availability per doctor per branch — required careful cache invalidation strategy with Redis to avoid stale data while keeping response times fast for concurrent users.