What a CoreBluetooth developer costs in the US, UK and Australia

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Search for this and you get generic freelance developer rate guides, none of which know what CoreBluetooth is. The rate for a BLE specialist is not the rate for a mobile developer, and it moves differently in each market. Here is what the numbers look like and, more usefully, what they leave out.

The bands

United States. Generalist freelance iOS work spans a very wide range depending on whether you are hiring through a marketplace or an agency. Specialist marketplaces list CoreBluetooth developers from around sixty dollars an hour at the low end, and experienced people who have shipped hardware products sit well above a hundred. Independent specialists quote as contractors, so there is no benefits loading inside the number.

United Kingdom. The contract market runs on day rates, not hourly, and quoting hourly marks you as unfamiliar with how it works. Mobile contract roles are advertised in day rates, and a niche skill like BLE sits at the upper end of whatever the general mobile band is. Convert carefully before comparing to a US hourly figure, because a day is not a fixed number of hours and nobody agrees on whether it is seven or eight.

Australia. A smaller pool than either, which cuts both ways. Less competition on price, but also genuinely fewer people who have done BLE against real hardware, so the search takes longer and the shortlist is short. Rates are quoted hourly or daily depending on whether the engagement came through a recruiter.

The UK number has a tax question attached to it

A UK day rate means something different inside IR35 than outside it, and a quote without that qualifier is incomplete. Inside IR35 the contractor is taxed broadly like an employee, so the same headline rate is worth materially less to them, and they will quote higher to compensate. Outside IR35 the number is cleaner.

If you are a UK company hiring a UK contractor, you need a position on this before you talk money. If you are hiring from outside the UK it usually does not apply, which is one quiet reason overseas quotes can look cheaper than they are comparable.

Australia has its own version of this. Contractor engagements can attract superannuation obligations depending on how the arrangement is structured, and GST applies once the contractor is registered. In the US the equivalent question is simply contractor versus employee, and a contractor rate has no benefits inside it.

Why BLE carries a premium in all three

The pool is small everywhere. Plenty of excellent iOS developers have never shipped a product where the app and the firmware had to be debugged together, and that experience is most of what you are paying for. The premium is not for knowing the CoreBluetooth API. It is for having already lost a week to each of these:

  • A scan that returns nothing because the advertising packet overflowed 31 bytes.
  • A characteristic that vanished because iOS is serving a cached GATT table from before the last firmware flash.
  • A connection that dies on lock because nothing retains the peripheral once the view controller goes away.
  • An OTA update that bricks a device when it is interrupted, because the bootloader erases before the first chunk lands.

Someone who has seen all four recognises them in an afternoon. Someone who has not will find them eventually, on your schedule and your budget.

Weeks times rate, not rate

The rate is the least interesting number in the quote. On a six week build, the gap between a hundred and a hundred and forty an hour is real but survivable. The gap between six weeks and fourteen is the project.

This is why the cheapest hourly quote so often turns out to be the most expensive engagement, and it is worse on hardware projects than anywhere else, because the failure modes are invisible until you are three weeks in and the device is disconnecting in someone's pocket. Ask for a range in weeks with the assumptions written down, and compare those.

What moves the price more than geography

Four things change a quote more than which country the developer is in:

  • Whether a written protocol document exists. If the GATT table lives in one firmware engineer's head, every quote you receive is a guess with padding on it.
  • Whether the firmware is finished. Building against a moving protocol is the single most reliable way to double a timeline.
  • Whether the developer will have hardware, and how many units. This is a shipping and customs question before it is an engineering one.
  • Whether OTA is in scope. It is its own project, not a feature, and it belongs in its own line on the quote.

A supplier who asks about these before quoting is telling you something useful about how they work. One who quotes a number immediately is telling you something too.

Comparing local and offshore honestly

The rate gap between these three markets and, say, India is real, and it narrows for BLE specialists because the pool is thin everywhere. The honest comparison is not rate against rate. It is what changes operationally: timezone overlap with your firmware team, who ships the hardware and how long customs takes, and whether the engagement survives on written artefacts rather than a daily call.

Ask for a range in weeks with the assumptions listed. A quote without assumptions is a number, not an estimate.

If you have a quote in front of you and want a second opinion on whether the weeks are realistic, send over the protocol document and the scope and we can go through it.