Hello! Are you looking for a mobile app developer who is experienced in using Kotlin programming language? Kotlin is a great choice for Android development due to its concise syntax, null safety, and overall compatibility with Java.
To find a skilled developer who can add features to your existing app, you can consider posting your job opening on various freelance websites such as Upwork or Freelancer. You can also look for developers on LinkedIn or other social media platforms.
When posting your job, it's important to be clear about the features that you want to add to your app, as well as the timeline and budget. This will help you attract the right candidates and ensure that you find a developer who can meet your needs.
Alternatively, you can consider partnering with a development agency that specializes in Kotlin development. This can provide you with access to a team of experienced developers who can work on your project and help you achieve your goals.
I hope this information helps, and best of luck with your search for a mobile app developer!