Kaan Baha Sever

1. Software Developer

   crowd.inc

   July 2021 to March 2024Jul 2021 – Mar 2024

   crowd.inc was a platform where people shared their ideas and found help for them. It had hundreds of users and was home to many projects, ideas and goals; later we turned towards private ideas. I owned the software development lifecycle end to end, from relational schema design in PostgreSQL to RESTful APIs in Python and Flask with a jQuery front end.

   • Designed granular role-based access control (RBAC) with strict permission boundaries between public and private data.
   • Built scalable feed pagination and dynamic data loading across the API and the front end.
   • Provisioned and configured the Linux servers the platform ran on.
   • Kept the system reliable through rigorous unit and integration testing.

   • Python
   • Flask
   • PostgreSQL
   • jQuery
   • Linux

• In development Early access Private

  Asion

  Privacy-first productivity and workstation activity tracking for macOS, Linux and Windows, built on native OS event hooks and a lightweight daemon, with self-hosting in mind.

  • C++
  • Objective-C
  • Go
  • gRPC

  Since 2024

  • Early-access site
• In production Private

  Novacast

  Manages many screens of different makes from one web panel. It runs on Windows, macOS, Linux, Samsung TV, LG TV and Android TV, and a screen starts playing as soon as it is turned on.

  • Rust
  • Go
  • MQTT

  Since 2025

  • Live site
• In production Open source

  Karecik

  A QR menu service for local cafés and restaurants. Customers scan a code and the menu opens on their phone; owners keep it up to date from a dashboard. It began with a menu for a friend’s café.

  • Go
  • PostgreSQL

  Since 2021

  • Live site
  • Source code
• In production Open source

  Açık Matematik

  An open-source publishing platform and modern textbook initiative for undergraduate mathematics in Turkish, with reproducible numerical computing and free PDF and EPUB editions.

  • Markdown
  • Python
  • Quarto

  Since 2023

  • Live site
  • Source code

How the mathematics turned into software, in four chapters.

1. Ch. 1

   Algorithmic foundations

   2016 – 2019 · C# · MS SQL

   It began in 2016 with C# at a vocational high school: data structures, algorithms, then database applications on MS SQL. My graduation projects were desktop Tic-Tac-Toe and Battleship, the game I played with my father as a child; the Hunt & Target algorithm came later.

2. Ch. 2

   Rocket avionics

   2019 – 2022 · Rocket and Space Club

   At the Istanbul University Rocket and Space Club, our team built one low-altitude (5,000 ft) and two high-altitude (10,000 ft) rockets. I wrote the flight avionics firmware and the parachute deployment control, filtered the sensor data with Kalman filters and used PID in our experiments.

3. Ch. 3

   Autonomous parachute guidance

   Research · Python

   An experimental project with university friends: a parachute payload that steers itself to a chosen landing point. A friend built the mechanics; I wrote the decision algorithm with linear algebra and a simulation to test it in, using the law of cosines and atan2 for the angles.

4. Ch. 4

   Flight-physics simulation

   2020 prototype · C++ rewrite

   One project that keeps evolving. In 2020 I wrote a narrow Python prototype that computes rocket trajectories in three dimensions. Now I am rewriting it from scratch in modern C++ as Rocket-Up, an open-source aerodynamic simulation engine for high-power rockets.

Small things to use right here: games against algorithmic opponents, a terminal, and browser tools that keep your files on your device.

• Game

  Battleship

  Hunt & target · probability density

  Place your fleet and duel a computer admiral that hunts with a probability density map, then closes in on every hit.

• Game

  Tic-tac-toe

  Minimax · alpha–beta pruning

  The classic 3×3 game against an opponent that searches the whole game tree. On the hardest level, a draw is the best you can do.

• Terminal

  Console

  Explore this site from a terminal, one command at a time.

  λ~$

• Tool

  Notepad

  A distraction-free plain-text editor with zen mode, autosave in your browser, find & replace with regular expressions, and live line and word counts.

• Tool

  Split PDF

  Preview every page as a thumbnail, pick pages by clicking or typing ranges like 1-3, 5, and download the result. Or split into parts as a ZIP.

• Tool

  Password generator

  Cryptographically secure random passwords with length and character-set options and a strength estimate.

• All games
• All tools