01
Problem
I wanted a clear buying journey for swimming headphones and control over how the store operates. The experience also needed to extend beyond checkout: getting music onto the headphones should be straightforward.
E-commerce case study
Splaash
An online store for my own swimming-headphone brand. From product discovery to checkout, order management and getting music onto the headphones.
- Role
- Founder, product design, full-stack development and operations
- Technologies
- SvelteKit · TypeScript · Fastify · PostgreSQL · Stripe
- Status
- Released
02
Solution
I built Splaash a custom storefront and a separate admin panel. The system connects products, a shopping cart, payments, inventory and order processing. Splaash Music supports customers when they start using the headphones.
03
Implementation
I developed the storefront and admin with SvelteKit and TypeScript, backed by Fastify and PostgreSQL. Stripe handles payments. Verified payment events, inventory reservations and background queues support the order lifecycle.
04
Outcome and evolution
The store is live at uintikuulokkeet.fi. The project connects running my own business with software development: I am responsible for both the customer experience and the services behind it.
The complete product
Commerce, operations and everyday use
A clear buying journey
Responsive product pages, a shopping cart and Stripe checkout take customers from discovery to payment.
A custom admin panel
Products, inventory, orders, shipment tracking and content are managed through one system.
Splaash Music
A browser-based music tool helps users import, arrange and transfer tracks to USB headphones.
The interface
From shopping to listening
The storefront and its companion music tool support two stages of the same product experience.
Under the hood
From interface to backend services
A custom commerce system where the storefront and admin share the same product and order core.
Implementation details checked against the project source on 7 September 2026.- Storefront and admin
- SvelteKit · Svelte · TypeScript
- Backend
- Node.js · Fastify · PostgreSQL
- Payments
- Stripe Checkout · webhooks
- Deployment
- Docker · self-hosted infrastructure