John Deliyiannis

The Archive

Writing

A running archive of things I learn, build, question and occasionally change my mind about.

83 entries · 12 topics

  1. Building DCAloop, an automated Bitcoin DCA app

    Notes on building DCAloop, a Rails app for automated Bitcoin DCA on Binance with restricted API keys, execution history and simulations.

    Rails 5 min read

  2. Rails World 2025

    A short note after Rails World 2025 on what I took from the conference, why Rails still feels practical and why I want to keep building with it.

    Rails 1 min read

  3. The Future of Work in the Age of AI

    Will technology liberate us from monotonous jobs and pave the way for an era of creative pursuits and passive income, or will it lead to widespread job losses and economic disparity?

    Thoughts 3 min read

  4. Sidekiq Restarts in Rails: Deployment Cautions

    Key precautions to protect your background jobs and ensure a smooth application update.

    Rails 2 min read

  5. Chess opening drills project

    Master chess openings with a drill plaform, designed for enthusiasts to practice and hone their skills. Upload custom PGNs, convert them into chess opening trees, and challenge yourself against a computerized opponent. Tailored for personal use, it's an MVP solution to a common chess challenge. Dive in and share your feedback!

    Rails 2 min read

  6. Mastery through Repetition: The Path to Sustained Excellence

    Dive into the intricacies of achieving and maintaining mastery in chess, drawing parallels with Brazilian Jiu-Jitsu, and the universal principle of consistent practice.

    Thoughts 4 min read

  7. Unraveling the Mysteries of where.not in Rails

    Unraveling the subtle differences between combined and separated where.not clauses in Rails. How a small difference can lead to significant outcomes.

    Rails 2 min read

  8. Exploring Mobile Development with AstroMobile

    Journey of AstroMobile, a cross-platform quiz game. Discover the challenges, insights, and the road ahead as we gear up for more intricate gaming experiences.

    Stories 1 min read

  9. Summer Side Projects: From Academic Insights to Movie Nights

    Discover two summer projects: Daily Academia for tracking papers, and Couch Potatoes for group movie selection.

    Thoughts 2 min read

  10. Wearables: Exploring Innovations and Practical Applications

    In this blog post, I will share my findings and hands-on experiences with wearables in 2023

    Thoughts 6 min read

  11. GPT-3.5 vs GPT-4

    A personal basic analysis and comparison of the latest Chat-GPT versions, focusing on their answer accuracy to better understand their performance in AI-driven communication

    Thoughts 3 min read

  12. Results from predictions of 2022

    The results from the predictions I did at 2022, a year ago

    Thoughts 4 min read

  13. About ChatGPT

    My observations about chatgpt

    Thoughts 2 min read

  14. Strange bugs

    I am describing two production error bugs that we recently encountered and the path to solve them

    Rails 4 min read

  15. Recipe for resize and combine images in ruby

    Compose two or more images in ruby

    Ruby 1 min read

  16. Ruby in reddit api

    Ruby way of communicating and using reddit through API

    Ruby 2 min read

  17. Mobile apps and some architecture

    Some nice to have parts to do when you have a mobile app which uses the endpoints from a web service

    Thoughts 3 min read

  18. Background jobs and some intrastructure info

    Redis, heroku render and the rest

    Stories 3 min read

  19. Fixed price for the project

    A client asked for a fixed price, is it possible?

    Thoughts 2 min read

  20. About money

    I am going to analyze my current philosophy and the purpose of money for me in this post

    Stories 5 min read