user106557: I'd like to give a good impression by solving a problem they already have, but I'm not sure what could it be.
Thanks!

user100690: I think there are few values that every exchange is looking for. 

ability to work with multiple coins (exchanges = shitcoin casinos)
ability to generate the addresses and manage them securely on-scale within organization
knowledge of API interfaces 

Regarding second point (as it's a bitcoin-related board) I'd advise looking at few projects that you can work on yourself, copying the ideas:

Key derivation tool: https://iancoleman.io/bip39/
Bitcoin transaction fee estimate like: https://billfodl.com/pages/bitcoinfees or https://bitcoinfees.earn.com/
Maybe some Lightning Network related project if you know that the exchange you are applying in may be interested

Although it relates to bigger exchanges only, as smaller ones use external order books and usually work only on the frontend. 

106557: <p>I'd like to give a good impression by solving a problem they already have, but I'm not sure what could it be.</p>

<p>Thanks!</p>
 100690: <p>I think there are few values that every exchange is looking for. </p>

<ul>
<li>ability to work with multiple coins (exchanges = shitcoin casinos)</li>
<li>ability to generate the addresses and manage them securely on-scale within organization</li>
<li>knowledge of API interfaces </li>
</ul>

<p>Regarding second point (as it's a bitcoin-related board) I'd advise looking at few projects that you can work on yourself, copying the ideas:</p>

<ul>
<li>Key derivation tool: <a href="https://iancoleman.io/bip39/" rel="nofollow noreferrer">https://iancoleman.io/bip39/</a></li>
<li>Bitcoin transaction fee estimate like: <a href="https://billfodl.com/pages/bitcoinfees" rel="nofollow noreferrer">https://billfodl.com/pages/bitcoinfees</a> or <a href="https://bitcoinfees.earn.com/" rel="nofollow noreferrer">https://bitcoinfees.earn.com/</a></li>
<li>Maybe some Lightning Network related project if you know that the exchange you are applying in may be interested</li>
</ul>

<p>Although it relates to bigger exchanges only, as smaller ones use external order books and usually work only on the frontend. </p>
