Hiring a freelance CoreBluetooth developer in India

ยท 8 min read

Most advice about hiring developers in India is written for web work, where the only things crossing a border are a git remote and a Figma link. Bluetooth work is different, because the developer cannot do the job without your physical device in their hands. That one fact drives almost everything that goes right or wrong here, and it is rarely the thing people ask about.

The hardware is the real constraint

There is no BLE radio in the iOS simulator. None. A CoreBluetooth developer with no hardware can write code that compiles and can be reviewed, and can verify none of it. So before the rate conversation matters at all, work out how the device gets to them and how long that takes.

Ship more than one unit. Two at minimum, three if the firmware is still moving:

  • Hardware fails, and a single dead unit stops the engagement completely until a replacement clears customs two weeks later.
  • Some bugs only appear with two peripherals in range, and reconnection logic is hard to trust until you have watched it pick the wrong one.
  • If firmware is mid-flight, one unit stays on a known-good build so the developer can tell an app regression from a firmware regression.

Budget real time for import. A development board sent to India goes through customs and attracts duty, and the paperwork wants a commercial invoice with a declared value even when the thing is a sample with no sale attached. Under-declaring to save duty is how packages get held. Two to three weeks door to door is a normal planning assumption, not a pessimistic one. Send the hardware the week you sign, not the week work starts.

Timezone overlap decides your iteration speed

India runs at UTC+5:30, and how well that works depends entirely on where your firmware people sit.

  • Europe is the good case. Four to six hours of genuine overlap with a normal working day on both ends, and no one has to be awake at a strange hour.
  • The UK gets a comfortable afternoon overlap, roughly 2pm to 6pm IST.
  • US East gets a thin morning-to-evening sliver that works if you protect it deliberately.
  • US West is the hard one. Twelve and a half hours apart means one side is always compromising, and a single missed question costs a full day.

Overlap matters more on hardware projects than on app-only ones because the blocking questions are firmware questions, and only the firmware team can answer them. Why is this characteristic returning a two-byte value when the spec says four. Is the device supposed to drop the connection after ninety seconds of idle. Does the bootloader erase before or after the first chunk lands. An app developer who has to wait overnight for each of those loses a day per question, and there are dozens of them.

What the rate difference actually is

Generic mobile development in India runs well below US and European rates, and everyone knows it. What surprises people is that the gap narrows sharply for Bluetooth specialists, because the pool is small everywhere. There are not many people in any country who have shipped a product where the app and the firmware had to be debugged together, and the ones who have do not compete on price.

So the useful comparison is not an Indian rate against a US rate. It is a BLE specialist at any rate against a generalist who is cheaper per hour and will spend three weeks discovering that background scanning ignores the duplicates flag. On a hardware project the schedule is the budget.

Run it async or you lose the advantage

A distributed hardware project survives on written artefacts, because the person who needs an answer is usually asleep when the person with the answer is working. Four things carry most of the weight:

  • A protocol document that is the single source of truth for every service, characteristic, UUID, byte order and error code. Not a chat message, not tribal knowledge in someone's head.
  • Packet captures instead of prose. A sniffer log or a nRF Connect export settles in seconds what a paragraph of description argues about for two days.
  • A mock peripheral, so app work continues when the hardware is bricked, in customs, or on a colleague's desk in another country.
  • One named person on the firmware side who owns protocol questions and answers within a working day. Not a rotating queue.
A shared protocol document and a packet capture are worth more than four extra hours of timezone overlap.

Contract details that catch people out

Cross-border engagements need a few things stated explicitly that domestic ones often leave implied:

  • IP assignment in writing, naming the client as owner of the work product on payment. Do not assume it follows from the invoice.
  • Currency and who absorbs the conversion and wire fees, agreed before the first invoice rather than argued about after it.
  • Indian freelancers invoicing overseas clients handle GST as an export of services, which has its own paperwork. It is routine, but ask rather than discover it at month end.
  • An NDA that covers the firmware spec, since that is usually the genuinely confidential part of a hardware project.

How to start

Send the hardware, then scope two weeks of paid work: read the protocol spec, scan, connect, subscribe to one characteristic, and report back on what the spec does not cover. That last part is the tell. Someone who comes back with a list of ambiguities in your GATT table has read it properly and will be cheap to work with for six months. Someone who comes back with only a green checkmark has not.

If you are at that stage and want the protocol review done, get in touch and we can look at your spec together.