Isak Reinholdsson


Currently building: Quick
CS + ML @KTH and @ETHZ

Isak Reinholdsson

Introduction

Hello, my name is Isak Reinholdsson. I am currently rethinking productivity software with Quick. I am also studying in Zürich.

  • To get in touch with me, send me an email at isakre [at] kth [dot] se.
  • Check out some of my projects!

Experience

Quick

Quick

Founder, CEO, Productivity Guru
2024-present
  • Rethinking productivity software.
  • Check it out here.

Relaxad/Honk and Go AB

Relaxad/Honk and Go AB

Software Engineer
2022-present
  • Doing full stack development at a start-up. Building a great product with a small team.
  • Full Stack Engingeering Internships summer 2022 and 2023. After august 2023 I have been working part-time.

Kickflip Games

Kickflip Games

Founder, CEO, Software Engineer
2020-present
  • Develops 2D- and 3D mobile games for iOS and Android.
  • The company has released two games so far, both of which have reached tens of thousands of users.

KTH Royal Institute of Technology

KTH Royal Institute of Technology

Teaching Assistant
2022-present

Ersta Diakoni

Ersta Diakoni

Software Engineer
2020
  • Helped develop various systems for the hospital, using a wide array of technologies.
  • Projects include: hospital website, automation of tasks, rewriting of backend systems, tools for the department of finance, data processing and statistics.
  • Most projects were done in either C++ or Python.

Education

ETH Zürich (Exchange M.Sc)

ETH Zürich (Exchange M.Sc)

Computer Science and Data Science
2024-2025
  • Courses in Advanced Machine Learning, Probabilistic Artificial Intelligence, Principles of Macroeconomics among others.

KTH Royal Institute of Technology (B.Sc + M.Sc + M.Eng)

KTH Royal Institute of Technology (B.Sc + M.Sc + M.Eng)

Computer Science and Data Science
2020-2025

Stockholm University (B.A)

Stockholm University (B.A)

Business and Economics
2022-2025
  • Courses in Finance, Accounting, Marketing and Organization.

Projects

Quick

My current full-time project
2024-present
  • MVP iOS App now available.
  • Productivity software aimed at reinventing task management.
  • Developed with React Native and the Reanimated/RNGH stack.
Quick

Wave Function Collapse Procedural Generation

2024
  • I developed a graph-based Wave Function Collapse algorithm for procedural generation of 3D tilemaps.
  • I wrote a blog about it.
  • Generate your own random island with the online demo.
Wave Function Collapse Procedural Generation

3D Renderer (Raytracer + Rasterizer)

2023
  • As a fun side project, I used C++ to implement both a slower raytracer algorithm and a faster rasterizer to render 3D scenes. Support for lightning, shadows and multiple cameras.
  • A few years ago, I also naively created a 3D renderer using 2D squares in Pygame. A demo of this fun but crazy idea can be viewed here.
3D Renderer (Raytracer + Rasterizer)

Video Generator

2023-2024
  • Experimenting with fully automated generation of short-form content for platforms like TikTok, Instagram, and YouTube using generative AI and web scraping.
  • Currently a proof of concept, with potential for scaling. Some of my generated videos are available here.

Reinforcement Learning for Stock Trading Bots

2019-2023
  • Web-scraped intraday trading data from the Swedish bank Avanza over several years.
  • Used reinforcement learning to train trading bots using this data.

Multiplayer Tetris

2021
  • Collaborated with a friend to create a simple online Tetris battle game for us to play.

Transformer from Scratch

2024
  • Together with some friends I implemented a transformer architecture from scratch.
  • We used it for text generation and trained it on Wikipedia. The final model can autocomplete queries and produce high-quality text.
  • Our paper.
  • Code is available here.
  • We also implemented the following (from scratch)
    • A RNN.
    • A LSTM.
    • Various tokenization techniques like word2vec, BPE and BPE4.
    • Nucleus Sampling and temperature based sampling.

Traveling Salesperson Heuristics

2023
  • As part of the Advanced Algorithms course at KTH, my group developed and optimized various heuristics to solve the NP-complete Traveling Salesperson Problem (TSP).
  • Our solution combined 2-opt, 3-opt, Clarke-Wright, and Lin-Kernighan heuristics, performing exceptionally well on benchmarks.
  • Code

Face Generator

2022
  • Implemented face generation using simple Gaussian, improved Gaussian, and Gaussian Mixture Models
  • Trained on the lfw dataset, producing some what convincing faces as shown below
  • Code is available here.
Face Generator

Biden vs Trump

2020
  • Created a 2D platformer based on the 2020 U.S. presidential election.
  • Gameplay combines elements of Mario and Geometry Dash.
  • Reached thousands of players with very little marketing.
  • Got on the app store top free action games list.

Piece Together

2019
  • Created a unique 2D puzzle game to address the lack of quality options in the market.
  • Reached thousands of players with very little marketing.