Fran Hrženjak

Tech lead and main developer for the project of computerizing a large one-meter (diameter), 24-ton telescope at the astronomical observatory on Tičan, Croatia.

This is an ongoing multi-year effort, and a combination of professional and volunteering work.

The telescope has started working full-time in 2017, and in 2018 it has been ranked third worldwide by the number of confirmation and follow-up measurements of all newly discovered asteroids.

This is an in-house solution for an air traffic controller training center. New candidates for air traffic controllers go through extensive simulations, called games, where instructors put them through various simulated situations in air traffic that they then have to correctly resolve in real time.

Before this project, the candidates and instructors who set up and run the games communicated using ad-hoc solutions such as WhatsApp or Viber or sometimes physically walking up to each other to communicate changes in the game. This was very inefficient and often ruined the element of surprise that the instructors were trying to create for candidates.

To facilitate better communication between candidates and instructors, the client envisioned a centralized system to which every pilot would connect using their PC, and every instructor would connect via a custom mobile app.

My job was to take the client's specifications and talk with the client to understand their problem fully. After this, I put together all the technologies and techniques that will be needed for the project, i.e., I architected the solution. Finally, I integrated a design and implemented the system.

I was added to the "authors" list for Django, my favorite open-source web framework, for fixing a bug that was sitting for nine years in the admin interface.

I am proud of the achievement, and hope to contribute again in the future.

Original bug report: #15910
I worked from a newer report, but same bug: #29087

A collection of sites for the Danish Ministry of Foreign Affairs. Each site is dedicated to one official visit of a business and state delegation to another country.

Each site features:
• Public section, with content and structure fully editable via CMS
• Registration and logistical information for participating company representatives
• Elaborate administration interface that aids the organizer team

There are three sites thus far:
https://hr2014.urbandanish.solutions/ (previously https://danishstatevisit.hr/)
https://danishstatevisit.dk/indonesia2015/
https://danishroyalvisit.dk/italy2018/

Developed in Django/Python. The front end was outsourced and is based on Bootstrap.

As of 2019, the project is still public and has been forked/pivoted to another type of events (organized by Danish Embassy in Zagreb). These events are more focused on a single industry at the time, e.g:
https://www.urbandanish.solutions/smartcities2017/
https://www.urbandanish.solutions/smartislands2018/
https://www.urbandanish.solutions/watercroatia2019/

Screenshot are available here: http://changeset.hr/portfolio/danishstatevisit-hr

A fully customizable front page slider driven by the WordPress admin panel.

A user-friendly (point and click) Google Maps tool for the Django admin panel that was developed for a tourist service.

A Croatian e-learning platform for the University of Rijeka that is based on Django. I created the back end, which features multiple courses, user registration, signup for courses, video lessons (YouTube), and quizzes.

A fully customizable layout template solution that I created to address inconsistent layouts between content types.

The project involved interacting with PLC devices, encompassing reading and writing operations. I successfully accomplished the coding task within 48 hours, including an additional sub-task of containerizing the project and publishing it online.

Several key features include:

• Implementation of a dummy PLC reader module designed for testing purposes.
• Utilization of Celery for background tasks
• Incorporation of a graphical representation illustrating the uptime and downtime of each device
• Provision of a feature to download the graph mentioned above as a PDF generated on the server side
• Full containerization of the project through Docker Compose, facilitating swift local deployment

I can provide a concise file containing PLC reader classes upon request. This file illustrates class inheritance, type annotations, and commenting. The class in use, whether FakeReader or PLCReader, is determined by the project settings file, where it is configured as a string value for dynamic import. This approach resembles how Django configures middlewares and other dynamically loaded elements.