Arttu Heinilä

About Me

I like figuring things out.

That has taken me through more than a decade in social services and development work, a Master’s Degree in Social Services, and eventually into programming. I started teaching myself Python in 2019, completed Data Science and Full Stack studies, and am now a third-year Information Technology Engineering student at Savonia University of Applied Sciences.

Programming appeals to me because it rewards curiosity and clear thinking. I enjoy taking messy problems apart, understanding what actually matters, and building things that are useful without being more complicated than they need to be.

My earlier career also means I tend to think about the person on the other side of the software. Systems have users, organisations and awkward real-world constraints. Knowing the technical answer is useful; knowing whether it solves the actual problem is better.

You can find what I’m currently building on Github Github logo

Projects

Must (To) Do Today! - Full Stack Personal Task Management App

Features:

Task Prioritization: Users can star important tasks, pushing them to the top of the list for immediate visibility.
Dynamic Task Management: Add, delete, and mark tasks as complete with intuitive keyboard shortcuts and a user-friendly interface.
Authentication System: Secure login and registration system with encrypted passwords to ensure user data is protected.
Responsive Design: Fully responsive web design, ensuring a seamless user experience across all devices.

Technical Stack:

Frontend: Developed using React.js for a dynamic and responsive user interface.
Backend: Node.js and Express.js create a robust server-side logic, including API endpoints for managing tasks and user sessions.
Database: PostgreSQL for efficient data storage and retrieval.
Security: Bcrypt for hashing passwords and basic security measures to protect user information.

Development Highlights:

Implemented efficient data handling and state management with React Hooks to ensure the app's responsiveness and speed.
Utilized PostgreSQL's robust features for complex queries involving task and user data management, providing a solid backend structure.
Deployed Frontend on own server and domain. Backend and Database deployed on Heroku for easy access and demonstration, leveraging its powerful dynos for seamless application hosting.

Reflection:

This project was a valuable opportunity to refine my full-stack development skills and understand the intricacies of deploying a production-ready application. It challenged me to implement a secure and efficient backend while ensuring the frontend remains user-friendly and visually appealing. A Simple to do react app to add and check off things to do for the day.

Live site here
GitHub Frontend repository here Github logo

GitHub Backend repository here Github logo

Web Page Creation For Wellness Industry Entrepreneur

I developed a tailored website for a wellness entrepreneur, focusing on user-centric design. Utilizing HTML, CSS, and JavaScript, I crafted a responsive layout with an intuitive hamburger menu.

The project involved detailed visual design, including font and color selection, and creating an efficient contact form. I ensured the content aligned with the client's brand and maintained the site for optimal performance and relevance.

Live site here

HTML5, CSS3, Javascript, Client work, Forms, Web Design, Responsive design

Netflix Sleep Timer Browser Extension

Screencapture of netflix sleep timer extension

I grew tired of constantly monitoring the end times of my child's shows and having to be the one to close the browser when a Netflix episode ended.

Since the browser version of Netflix does not include a sleep timer, I decided to create a solution for myself. The resulting Netflix sleep timer is openly available in case I'm not the only one who wants an automated solution for limiting Netflix viewing for children or myself.

Close the window at the end of an episode.
Pause the video after a user-defined time.
Close the window after a user-defined time.

Simple (but not entirely easy).

Extension here
GitHub repository here Github logo

HTML5, CSS3, Javascript, Firefox Extensions

Pomodoro Work Timer GUI

A Timer program that times your work in 25 minute sprints, after which the program starts a 5 minute break. The timer logs your working habits to a file separate file. After 4 pomodoros the program activates a longer break
Program includes a changing GUI that has distinct color and location on screen to signal whether you should be working or taking a break.

Click on the image to see the workflow

GitHub repository here Github logo

Python, GUI, Access file system

Quick And Dead Single Page Application

A Single Page Application for choosing a kettlebell workout in the style of Pavel Tsatsouline in Quick And Dead.

Javascript to create randomness and show the results of the thrown dice and exercise recommendations one by one with 1 second delay for dramatic effect

Live site here
GitHub repository here Github logo

HTML5, CSS3, Javascript, Web Design, responsive design

Monte Carlo engine Retirement Calculator

Monte Carlo Engine of Stock Investing Screencapture

Using the Monte Carlo Simulation to test the probability of having enough at retirement or going broke based on historical returns of stocks and bond.

The program let's one input investment types (bonds, stocks or a mix of both), starting amount of money, how much withdrawal one takes each year, minimum, most-likely and maximum years in retirement.

Program runs through different amount of cases with different starting points in time (default 50 000) and returns odds of running out of money, minimum, average and maximum amount of money based on the simulations. Lastly the program creates a bar chart of simulations (plotting only first 3000 for efficiency).