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abin.th

Freelance · Full-stack

Freelance clients · Confidential

E-commerce Platforms

Single-vendor online stores for freelance clients: a customer storefront, an admin panel for products, orders and inventory, and integrated payments.

Client and product names are withheld for confidentiality.

Problem

Businesses needed their own online store, plus a way to manage products, orders and stock day to day.

What I built

  • Customer-facing storefronts in Next.js and React
  • Backend APIs in Node.js and Express, with MongoDB
  • An admin panel for products, orders and inventory
  • Payment gateway integration at checkout

Technical highlights

  • Delivered end to end as a freelancer, covering frontend, backend and payments
  • Admin tooling so clients could run their stores themselves

Key decisions

  1. 01

    Next.js for the storefront

    Server-rendered product pages that search engines can index, so the store can be found through search.

  2. 02

    MongoDB for the catalogue

    Products carry varied attributes and variants, and a document model holds them naturally without rigid schemas.

  3. 03

    An admin panel built for non-technical owners

    Clients manage products, stock and orders themselves, with no developer needed for day-to-day changes.

  4. 04

    A hosted payment gateway

    The gateway handles card data, so no sensitive payment details ever touch our servers.

Hardest problems

  • Payment and order states: confirmations, failures and refunds
  • Keeping inventory accurate so stock never oversells
  • Product variants: sizes, colours and pricing combinations
  • A smooth checkout experience

Architecture

  1. Next.js storefront | Admin panel
  2. Node.js · Express APIs
  3. Payment gateway
  4. MongoDB

Stack

  • Next.js
  • React
  • Node.js
  • Express.js
  • MongoDB