Nikola Đuza

Worked on a continuous integration service. Built most of the UI parts of the service in Rails and React. Built integrations with AWS Elastic Beanstalk, AWS S3, and AWS Lambda (mostly in Rails). Built integration with all the major Docker Registries (Docker Hub, AWS ECR, Google Cloud Registry, Quay.io etc.) using Rails. Built integration with GitHub Marketplace, a place where GitHub users can buy plans on Semaphore CI. Created a microservice in Elixir for handling user build times and waiting times. As an extension of that microservice, created another microservice in Elixir that sends email summaries of user build times and waiting times.

Elixir microservice that is Dockerized and it serves as a data provider for a part of the Semaphore CI. It consumes messages from RabbitMQ and stores data in its database. It exposes endpoints for fetching the stored data. It calculates waiting and build time of a particular user, project or an organization. It is very useful since it reveals insight in how much users are using Semaphore CI.

Worked on a website for publishing and bidding job auctions. Most job auctions are about software engineering positions. Worked on a logic for publishing auctions, and showing them to the users. I did this as my first job as a freelance web developer.

Built a chat bot that changes your relationship with the bank. It works through Facebook Messenger and it's a Rails application on Heroku. It's won 3rd place at the Fintech Hackathon at ICT HUB in Belgrade.

Built a React Native application for the Android phones in a group of 3 people. We used latest practices in React, Redux and JavaScript. Application lets you schedule events with your friends. You invite your friends via email and they can respond whether they'll be participating. Once a friend confirms or denies, you get a push notification to your device.

render_async renders partials to your views asynchronously. This is done through adding JavaScript code that does AJAX request to your controller which then renders your partial into a Rails view. JavaScript code is injected at the bottom of your page and it's ran when the page loads. The JS code sends a GET request to your server in order to fetch data. Once the request is finished, response data is then rendered in the HTML at the place user specified.

This project alleviates the need for using Single Page Application and it saves the user from writing the same Rails and JavaScript code if he wants to load something asynchronously on the page.

Gem that sorts your Gemfile alphabetically. It is meant to be used inside Rails projects so the Gemfile is nice and sorted.

My personal blog, where I write about tech-related topics. I also keep a newsletter that goes about four times a year. It features blog posts I wrote as a guest writer for other blogs, as well as blog posts I wrote exclusively for my blog.

A small website where you can find links to my profiles on social networks and contact me via email. It's done in plain HTML and CSS.