In a physical store, this is where the software meets the customer. The industry calls the billing counter the point of sale, or POS. Behind it sits the store system, which holds the prices, the stock and the day's takings. The industry calls this the back office. The buyers are retailers of every size, from supermarket chains to fuel stations.

The same counter, seen from the payment's side, is covered in Market Segment 17.3, Point of sale (POS)
Every company named here has posted software engineering jobs in India. Famous companies that don't actively hire software engineers in India are left out.
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Back to the supermarket counter from the start of this Market Segment. Here are the companies that make the machines and the software behind it.
Cameras and sensors that see what a shopper takes, and phones that scan as the shopper goes, make the checkout optional. Self-checkouts have already replaced many staffed counters. The next step is the checkout-free store, where the customer simply walks out and is charged. Retailers are weighing it against the theft and the mistakes it brings.

Who these companies hire, and for what, is on What retail tech companies hire for.