Kadir Ristjan Klade

Full Stack Software Engineer

# Introduction

    I am a software engineer based in Tallinn, Estonia, obsessed with optimization and building high-performance systems. My core focus lies in backend development, leveraging state of the art technologies to squeeze every bit of efficiency out of my code. However, I don't stop at the server; I love crafting the fun little frontend details and micro-interactions that bring a user interface to life. Whether it's architecting scalable infrastructure or fine-tuning small animations, I can make it happen.

# Projects

  • wisehosting.com

    full-stack lead engineer: website, game panel, API development & optimization for a Minecraft hosting company. PHP and Go backend with Laravel Blade frontend.

  • coolbet.com

    devops: contributed to internal devops & release management tooling via a research project. k8s, helm charts and ci/cd pipelines with Argo & Kargo.

  • securefinance.ee

    elegant website with i18n (multi-language) support, email contact form with bot detection and rate-limiting, made using SvelteKit.

  • rori

    highly multithreaded tool for pruning Minecraft worlds, designed to be used for large-scale world management. 12x faster than other industry solutions.

  • vidbox

    TryHackMe CTF challenge that used a video streaming site as a vector for exploitation.

  • ziria

    minecraft avatar service that provides higher uptime and performance. Minimizes the avatar to only 174 bytes, meaning that you can store 5,747,126 avatars in 1GB of Redis cache.

  • tornhooldus.ee

    elegant website with i18n (multi-language) support, email contact form with bot detection, made using SvelteKit.

  • ... and much more

    see my github for more projects, most of them are public and include documentation.

# Contributions

  • Modrinth

    the most popular and open modding platform for Minecraft, website made with nuxt and game launcher made with tauri (rust) and nuxt. I have contributed hundreds of lines of code to the respective projects and helped the community with support, documentation and bug fixes.

  • movie-web

    part of the project leads of movie-web, a website for finding movies and tv shows. Made with react and typescript with support for proxies, syncing watch histories and much more, no ads and no tracking. peak of 100k daily active users.

# Achievements

  • ÕpiRadar - TI-Hüpe

    passion project for Estonia's Presidential Hackathon, which focused on artificial intelligence integrations and workflows for education. Our team was awarded a spot in the in-person hackathon that featured industry-leading mentors from the national Eesti.ai council, unicorn founders and education thought leaders.

  • fitness app

    found a critical OWASP high risk vulnerability that allowed any attacker, registered or not to gain access to every users email, full name, phone number and personal identification code. The same vulnerabilty allowed an attacker to open the door to the gym with any card number. bounty awarded and vulnerability fixed.

  • used clothing marketplace

    found several security vulnerabilities, one that allowed an attacker to make any user that loads a product request an arbitrary URL and multiple critical IDORs that allowed viewing of private user information including private and or deleted listings.

  • neokyo

    found an exploit allowing you to set the discount of an item to any amount, even negative, allowing you to essentially get items for free or incredibly low prices. bounty awarded and vulnerability fixed.

  • annaabi

    found an exploit allowing an attacker to view every paid and or unpaid material uploaded to the website.

# Certifications

  • Cambridge C2

    Cambridge English Proficiency (CPE) certificate, level C2, 2025.

  • CS50

    Introduction to Computer Science, Harvard University, 2022. ten problem sets, eight labs and one final project.

  • CS50 Python

    Introduction to Computer Science with Python, Harvard University, 2022. nine problem sets and one final project.