A man of many passions

DawidLe Hai

Full-stack web developer dedicated to writing clean, maintainable, and secure code.

Learn more

Professional

Web Developer

Frontend developer art

Who has a

Degree in Psychology

Psychologist art

Is a passionate

Personal Trainer

Personal trainer art

And an amateur

Music Producer

Music producer art

01Projects

Projects that taught me a lot

In my portfolio, you will find commercial, personal, educational, and course projects written in various JavaScript-related technologies. Each of them taught me something new or helped me improve my skills.

Feel free to take a look.

  • Commercial project

    Kociołek

    Buffet and cafe in Bydgoszcz

    Home page of the Kociołek company. The project involved designing the page layout, choosing colors, graphics and fonts, and writing TypeScript, CSS, and HTML code using Remix and React frameworks.

    Kociołek - Screenshot
    • Remix Remix
    • React React
    • TypeScript TypeScript
    • CSS CSS
    Kociołek - Mobile Version
  • Personal project

    Natio

    Countries and their neighbors

    A SPA-type educational application written in JavaScript, Sass, and HTML that allows you to view information about countries and their neighbors, as well as add countries to favorites and track your learning progress.

    Natio - Screenshot
    • JavaScript JavaScript
    • Sass Sass
    • HTML HTML
    Natio - Mobile Version

02Skills

Technologies I am focused on

Lately, I focused on learning full-stack and back-end technologies and frameworks. I took some interesting courses, wrote many projects and struggled with hundreds of lines of code to prepare myself for bigger challenges.

  1. React
    React
  2. TypeScript
    TypeScript
  3. Remix
    Remix
  4. Astro
    Astro
  5. Next.js
    Next.js
  6. Node.js
    Node.js
  7. Express
    Express
  8. MongoDB
    MongoDB
  9. MySQL
    MySQL
  10. Photoshop
    Photoshop

Courses completed

  1. Udemy The Ultimate MySQL Bootcamp: Go from SQL Beginner to Expert

    MySQL

    Author Colt Steele

    Length 18 hours

  2. FreeCodeCamp JavaScript Algorithms and Data Structures

    JavaScript

    Author Multiple authors

    Length 80 hours

  3. Udemy Remix.js – The Practical Guide

    Remix

    Author Maximilian Schwarzmüller

    Length 8.5 hours

  4. Udemy Understanding TypeScript – 2023 Edition

    TypeScript

    Author Maximilian Schwarzmüller

    Length 15 hours

  5. Udemy React – The Complete Guide (incl. Hooks, React Router, Redux)

    ReactReact RouterRedux

    Author Maximilian Schwarzmüller

    Length 49.5 hours

  6. Udemy Node.js, Express, MongoDB & More: The Complete Bootcamp 2023

    Node.jsExpressMongoDB

    Author Jonas Schmedtmann

    Length 42 hours

  7. Udemy Advanced CSS and Sass: Flexbox, Grid, Animations and More!

    CSSSass

    Author Jonas Schmedtmann

    Length 28 hours

  8. Udemy Git Complete: The definitive, step-by-step guide to Git

    Git

    Author Jason Taylor

    Length 6.5 hours

  9. Udemy The Complete JavaScript Course 2022: From Zero to Expert!

    JavaScript

    Author Jonas Schmedtmann

    Length 69 hours

  10. Udemy Build Responsive Real-World Websites with HTML and CSS

    HTMLCSS

    Author Jonas Schmedtmann

    Length 37.5 hours

03Education

Education and scientific activity

Programming is a passion that I have been developing since childhood. It encouraged me to study in a technical high school with an IT profile class, and then to study computer science. Various events, however, also made me interested in psychology. Only after years of studying psychology did I decide to return to my original passion.

During my five years of psychology studies, I showed great interest in scientific research and participated in the student forum to improve the teaching process.

  1. Master's Degree in Psychology

    GPA: 4.86

    I obtained a master’s degree in psychology at the Faculty of Psychology of UKW with the highest GPA. For four years I was the prefect of the year and have been receiving a scholarship for scientific achievements. I was also a member, president and vice-president of many scientific clubs, and for a short period, I represented the Student Council.

  2. Student Exchange, Psychology

    GPA: 4

    As a laureate of the EEA grant, sponsored by Iceland, Liechtenstein, and Norway, I participated in a student exchange at Inland Norway University of Applied Sciences at the Inland School of Business and Social Sciences, where I studied psychology in English for 6 months. During my stay in Norway, I learned a lot about Scandinavian culture and philosophy.

  3. Applied Computer Science

    GPA: 4.5

    I completed the first semester of studies in the field of applied computer science at the Faculty of Telecommunications, Computer Science, and Electrical Engineering of the Bydgoszcz University of Science and Technology. I also attended classes in the second semester for some time but eventually resigned and started studying psychology.

  4. Information Technology Technician

    GPA: 5.17

    I obtained professional qualifications by completing a 4-year Electronic Technical School at the Zespół Szkół Elektronicznych im. Wojska Polskiego in Bydgoszcz in a class focused on mathematics and information technology. I graduated with the highest GPA in the class and a score of 98% in the computer science advanced-level exam.

Academic awards

  • 2021/2022

    Award for the best graduate of the University

    Award of the Rector of the Kazimierz Wielki University for the Best Graduate of the academic year 2021/2022 for non-scientific activity.

  • 2021/2022

    Award for the best graduate and student

    Award of the Council of Kolegium II of the UKW for the best graduate and student of the academic year 2021/2022 for very good academic results and non-scientific activities.

  • 2021/2022

    Award for the best master's thesis

    Award of the Council of the Kolegium II of the Kazimierz Wielki University for the best master's thesis in the field of psychology in the academic year 2021/2022.

  • 2018/2022

    Scholarship for scientific achievements

    Scholarship of the Rector of the Kazimierz Wielki University for scientific achievements, received for 4 years from 2018.

Selected research activities

  • First author of the scientific article

    Towards Pro-environmental Psychology and Education: Personality Traits and Sociodemographic Correlates of Environmental Identity and Voluntary Simplicity

    The article was written in collaboration with Paweł Larionow and was published in the journal Lublin Pedagogical Yearbook (vol. 41, no. 4, pp. 53–76).

  • Co-author of the work

    The relationship of N2 and P3 ERP component amplitudes in a go/no-go task and behavioural measures of fluid intelligence, working memory and inhibitory control

    The work was presented in the form of a poster at the international scientific conference in Prague during the 48th Meeting of the European Brain and Behavior Society.

  • Participated in the research project

    Neurophysiological correlates of the effects of training elementary cognitive functions and their transfer to fluid intelligence in early adulthood

    The project was carried out as part of the Diamentowy Grant program of the Ministry of Science and Higher Education at the Faculty of Psychology of the Kazimierz Wielki University under the supervision of Łukasz Warchoł, MA.

  • Participated in the research project

    Searching for electrophysiological indicators of the cognitive processes involved in compensatory brain activity and its possible changes under the influence of working memory training on the elderly

    The project was carried out as part of the NCN OPUS 13 program at the Faculty of Psychology of the Kazimierz Wielki University under the supervision of Ludmiła Zając-Lamparska, Ph.D.

  • Co-author of the work

    Effects of working memory training on the N200 and P300 ERP components registered in a go/no-go task: electrophysiological measurement of training-induced cognitive transfer

    The work was presented in the form of a poster at the international scientific conference in Warsaw during Aspects of Neuroscience 2018.

  • Conducted research project

    The possibility of improving memory functions through the use of coloring books for adults and the temperamental features of young adults

    The project received the first prize at the 9th National Student Scientific Conference titled Psyche-Ciało-(Nie)Możliwość organized by the Student Science Club of Psychotherapy of the Kazimierz Wielki University.

04Music

My music

Even though I'm not a musician, I enormously enjoy creating tracks. When I'm composing, I'm not limited by a genre and I'm happy to experiment with different sounds.

You can find all of my tracks on SoundCloud.

05Hire me

Let's work together!

I’m always looking for opportunities that will enable me to enhance my programming skills while upholding ethical business practices and demonstrating care for the environment.

If you'd like to work with me, feel free to contact me via LinkedIn.