All work

Shopping optimizer

RepMax

Splits a Represent basket across orders to squeeze the most out of Prestige loyalty discounts.

Fill a basket, set your tier and points, and get the split that saves the most — down to which code goes on which order.
Client
Side project
Type
Shopping optimizer
Year
2026
Status
In use
01

The brief

Where it started.

Represent's loyalty program allows one discount per order, rewards have minimum-spend gates, and sale items never discount. Splitting a basket into several orders can stack more savings — but working it out by hand is tedious.

02

What we built

So we shipped 4 pieces.

  1. 01Exact optimizerSearches every way to split the basket, in a Web Worker
  2. 02Two modesSmart mode picks rewards from your points; manual mode locks specific codes
  3. 03Live catalogueSynced from 11 regional storefronts on a schedule
  4. 04Everyday polishCurrency conversion, shareable scenarios and a guided phone setup
03

Under the hood

The part worth a closer look.

The clever part

For typical baskets the recommended split is provably optimal, not a heuristic — it scores every partition against tier and reward rules.

04

Stack

And what it all runs on.

  • Next.js 15
  • React 19
  • Web Workers
  • GitHub Actions
  • Vitest

Need something like this?

Tell Echo what you’re trying to build — rough is fine. You’ll leave with a clearer sense of what it would take.

Start the chat