Two speeds of charging. Slow charging uses the ordinary alternating current (AC) from the mains, and takes hours. It suits a home or an office car park. Fast charging supplies direct current (DC) straight to the battery, and takes tens of minutes. It suits highways and busy city sites.

A charging network is mostly software. The charger itself is hardware, but running thousands of them is a software job:

A charging network is mostly software: chargers from different makers talk to the network cloud through OCPP, the cloud watches them, finds faults and sets the price, and the driver's app finds a charger, starts the charge and takes the payment.

Two roles, and roaming. The company that owns and runs chargers is called a charge point operator. The company whose app and account the driver uses is called a mobility service provider. Sometimes they are the same company, and sometimes not. Roaming lets a driver use another network's charger with their own account, as a mobile phone roams on another operator's network. The networks then settle the payments between themselves.

Roaming: a driver uses another network's charger with their own account, as a mobile phone roams on another operator's network, and the networks then settle the payments between themselves.

How the money flows. A charging network earns for each unit of electricity it sells, or for each minute of charging. Chargers are expensive, so a network earns back its cost only if its chargers are used often. Some companies also sell charging software to others who own chargers, such as fuel stations, offices and fleets.

Battery swapping. In India, many electric two- and three-wheelers use battery swapping. The rider does not own the battery. They pay for each swap, or a monthly fee. This makes the vehicle cheaper to buy, and a swap takes far less time than a charge. (More on the batteries themselves in Market Segment 38.7, Auto components and EV batteries.)

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.