Hierarchy
Hierarchy
Emulator Tests
Overview

A Trello-like goal manager webapp that uses trees to express hierarchical relationships between goals and tasks in your life while retaining the task oriented list/column view. Built in Scala + Neo4j (a graph database) to express goal hierarchies, Node + MongoDB to create the user service, and Typescript + React to build out the frontend.


Key Technologies
Scala
Scala
Node JS
Node JS
Typescript
Typescript
Neo4j
Neo4j
MongoDB
MongoDB
React
React
Redux
Redux

Creation

For years I’ve managed my to-do lists in Trello. Over the years, I’ve streamlined my Trello boards to match my style of planning, but I always felt like there was something missing. Over the summer of 2019, I had the realization that led me to creating Hierarchy.

In Trello, tasks are independent, related to each other through labels, tagging cards with extra information, and columns, denoting the current status of the card. But tasks really aren’t completely disjoint. Most tasks are in pursuit of a particular goal, and those goals in pursuit of particular dream. Trello fails to describe the relationships between the many day-to-day tasks that people complete.

From that I knew that I needed to create some sort of tree-like structure to relate dreams, goals, sub-goals, and tasks to each other. So I started by building a frontend to display these card relationships in Typescript and React.

With a simple frontend displaying trees of cards complete, I started working on a backend that would be flexible enough to express all sorts of relationships between cards. The nature of the many-to-many relationships of this tree structure led me to choosing the graph database, Neo4j and Scala, to operate on this data structure in a natural and compact way.

As I progressed, I began to add more and more features, eventually building out a separate user service and a complete list view to manage individual tasks. This iteration eventually resulted in more than just a task manager changing into something more like a life manager, allowing the user to map out all of their goals and relate them to their day-to-day life.


Takeaways

I’ve thrown around the idea of building a Trello-list task manager from scratch for years but it took an insight into how I planned out my tasks to realize that I needed to turn those ideas into a real product. It’s been fascinating to work with a graph database and to continue to advance my Scala skills. I even got to play with a microservice architecture, building a solid foundation for future development of Hierarchy.

Every few years I take on a project like this. It’s a culmination of the skills that I had developed at whatever point of life I’m in. Previously, it was candidateXYZ, two years later, it was Hierarchy. Through recent internships, I’ve realized that I have a passion for data engineering, and my current clumniation project reflects that interest.

GitHub


© 2018-2019 Jake Kinsella