What keyboard you recommend for coding?

Any keyboard you want really. Most of the time spent coding is thinking not typing.

I use a Tokonami KX450, which is not the newest but it's the most widely available military-grade model that the average silicon shop is able to customise.

With that in mind you'll want a uranium microreactor to really get that turbo button cranking out the keycodes (the french stuff is cheapest but ukrainian kit is worth the extra), as well as a mercury cooling solution and ideally a set of maglev keys for all the most common letters (NOT backspace; frankly you should remove that key entirely to avoid habits that damage your WPM).

Assuming you've got a solid pair of high-torque power gloves that should get you up to at least 20000 WPM, which admittedly won't cut it if you're trying to keep all the NPM dependencies up to date in a modern bank's transaction processing software, but it's probably enough if you're just doing a bit of data analysis in python.

Make sure to buy one with a dedicated button for each letter you want to use. Really, I would recommend something QWERTY just for standard compatibility.
Scarastic jokes over, it literally doesn't matter at all. Just look online for the cheapest keyboard with the features you want. Type on a cellphone touchscreen keyboard if you are so inclined. If you are typing so much that it really starts to hurt your finger joints or muscles, then you can maybe start to look at ergonomic keyboards and see if they'd be right for you. Beyond that, your time is better spent actually coding than worrying about the proper type of keyboard to use.

I like my keychron. They make a wired one in your price range.

Many people don't seem to have an issue but those that do seem to find relief of finger hand and wrist pain by switching to colemak layouts. That layout seems to be widely supported by systems in general.

I use the Logitech K120. It has all the right keys in all the right places and doesn't piss around with useless "media functions" on the F-keys making those the default instead of F1-F12.

Programming is about thinking, not typing, so you really don't need anything fancy. I've tried a couple of gaming keyboards only to find they're flaky af and ended up in the WEEE bin far too quickly for their price.

It doesn't meet your requirements of being wireless and Bluetooth though, but on the other hand it doesn't have stupid lights all over it and doesn't randomly stop working just because I forgot to plug it in so there's that.

Budget's about half what it should be, but Keychron makes really great mech keyboards, you can pick a range of switches (I use Gateron Red, clicky but not too stiff; YMMV).

You should reconsider bluetooth if you can, there is lag in it, and sometimes just random disconnects if there's interference. USB's the way to stay fast & stable.

I have been using "gaming" keyboards for coding for ~10 years now. The only thing to be wary of imo, is keebs that have "extra customizable keys" on them and break conformity from a standard layout. Depends on the device, but Logitech will call them "G keys", for example, and often stick them on the far left of the board, left of tab/caps/L shift. Makes life a lot more difficult if not gaming.

Outside of that, I think calling something a "gaming" keyboard is more of a marketing tactic to up the price. It's hard to not recommend mechanical, but that sounds out of budget and often hard to do wireless/bluetooth, but personally I think mech is the top priority.

What I have seen a lot of peers do is wait to see whatever keyboard the get in office, then buy the same one for home for consistency, rather than dragging a personal one back and forth. Often companies will offer basic boards like logitech K270, K350, or K650. Not amazing, not terrible, and most likely fit in your described criteria.

I'd go with an ergonomic one to avoid pain on the outside of the wrists. I also use a vertical mouse for the same reason

I use a single key and morse code

You wrote you want a full keyboard with F keys, arrow, and numpad - but it can be compact too.

What would be an example of that combination?

Try a backlit keyboard, especially for late night coding sessions. But that will likely conflict with the Bluetooth requirement. Does not have to be per key rgb; a fixed single color will be good enough.

Waaaay out of your proce range, but I absolutely love the Keyboardio Model 100 . https://shop.keyboard.io/products/model-100 it's a really freaking amazing keyboard. The palm key makes typing the brackets and braces and others so much easier.

Great keyboard. I love it.

I tried Logitech's wave keys at the store and I fell in love with them. I have several custom keyboards (including a HHKB with topre keys and WASD Code keeyboard) and this puts them to shame, unfortunetly. Can pick it up for $56 USD.

https://www.logitech.com/en-us/products/keyboards/wave-keys.html

• The shape is not those crazy ergo keyboards but the keys are very easy to reach, and you will not have to adjust to a new layout if you are comfortable with laptop keys.
• The keys have more travel than laptop keys but less than mech keyboards (on average).
• The Keys are also effortless to press but offer resistance.
• Bluetooth and if you use wireless Logitech mouse you can use the same BT receiver.
• They have them at Staples and Best Buy, so you can go and try it out.

As for programming, I found the WASD Code keyboard to be pretty customizable with their hardware switches. I can flip a switch and boom, my Caps Lock is now another Ctrl, etc. But you can do that in the OS as well. They go around $99 and you can pick different keys. Not sure if they have any wireless ones

https://www.wasdkeyboards.com/code-v3-87-key-mechanical-keyboard-cherry-mx-blue.html

a keyboard.

Hard to do on controller.

I'm partial for the Royal Kludge RK84 for no particular reason other than it's one of the rare small form factor keyboards that has USB passthrough. It's a godsend if you use a USB security key, and it also helps if you need to plug in additional devices such as a USB headset.

If keychron had any model that supported USB passthrough, I'd update my recommendation.

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I am using a Logitech mechanical. It has Bluetooth and is quite decent.

Batteries are not replaceable I think but the keyboard itself is affordable and superb