---
title: "Kristjan Kosic (@kristjank) | Hashnode"
description: "CTO @ ARK.io. Making things happen in the blockchain world, by bringing blockchain technology to the masses."
url: "https://hashnode.com/@kristjank"
---

@kristjank

# Kristjan Kosic

@kristjank · Joined February 2019

CTO @ ARK.io. Making things happen in the blockchain world, by bringing blockchain technology to the masses.

### [The Introduction To Blockchain Application Development — Part 2/2](https://kristjank.hashnode.dev/the-introduction-to-blockchain-application-development-part-22?utm_source=hashnode&utm_medium=feed)

In this post, we will take a deep-dive into developing custom transaction types with our Core GTI (Generic Transaction Interface) technology. We will learn how to add the new business logic to a blockchain by introducing custom transaction types tail...

[kristjank.hashnode.dev](https://kristjank.hashnode.dev/the-introduction-to-blockchain-application-development-part-22?utm_source=hashnode&utm_medium=feed)

[1](https://hashnode.com/posts/the-introduction-to-blockchain-application-development-part-22/5d6f8a5e11b74ea5506393dd) [Sep 4, 2019](https://hashnode.com/posts/the-introduction-to-blockchain-application-development-part-22/5d6f8a5e11b74ea5506393dd)

### [An Introduction To Blockchain Application Development - Part 1/2](https://kristjank.hashnode.dev/an-introduction-to-blockchain-application-development-part-12?utm_source=hashnode&utm_medium=feed)

In this post we will get familiar with the architectural approaches that make blockchain application development almost like a walk in the park. We will address five simple, yet efficient software development approaches for blockchain applications. E...

[kristjank.hashnode.dev](https://kristjank.hashnode.dev/an-introduction-to-blockchain-application-development-part-12?utm_source=hashnode&utm_medium=feed)

[Jul 9, 2019](https://hashnode.com/posts/an-introduction-to-blockchain-application-development-part-12/5d243804673b549108e64233)