Yağızhan Güler
Founder at kutu.ai
Istanbul, Istanbul, Turkey
Summary
🤩
Rockstar🎓
Top SchoolYağızhan Güler is a founder and backend-focused software engineer with seven years of experience building open-source billing and client management systems from Istanbul. Currently leading kutu.ai and building FOSSBilling, he combines backend development, DevOps automation (notably Docker Compose-driven installers) and practical database compatibility fixes that keep projects production-ready. His contributions to legacy BoxBilling and the modern FOSSBilling show a knack for simplifying installs, removing brittle licensing checks, and adding extension-store support—work that benefits hosting businesses and the wider open-source community. Early roles in machine learning at Pixery and a mobile internship at Clarifai give him a cross-disciplinary perspective on product and infrastructure. A Bilkent University computer science graduate, he also cultivates community tooling through js.org domain curation, highlighting an interest in developer ecosystems beyond code.
7 years of coding experience
2 years of employment as a software developer
Galatasaray LisesiBachelor's degree, Computer Science, Bachelor's degree, Computer Science at Bilkent University
English, Turkish, French, Italian
Github Skills (24)
billing10
javascript10
docker10
domain-name10
mysql10
docker-compose10
custom-domain10
dockers10
php10
dns10
hosting10
subdomain10
composer10
co10
bash9
Programming languages (24)
Github contributions (5)
FOSSBilling/FOSSBilling
Apr 2022 - Jan 2023
Empower your hosting business with FOSSBilling, the free and open-source solution for efficient billing and client management.
Role in this project:
Backend & DevOps Engineer
Backend & DevOps EngineerContributions:1 release, 452 reviews, 417 commits in 9 months
Contributions summary:Yağızhan primarily focused on improving the FOSSBilling installation process, particularly through the use of Docker Compose. They rewrote the installation script to create necessary directories, configure the config file, install composer dependencies, and build the admin theme. In addition, they improved the overall build process and added support for a new extension store, and the user made various small adjustments and improvements across the codebase.
hostingpaymentsmysqlecommercetwig
boxbilling/boxbilling
Oct 2020 - Jun 2022
BoxBilling - Open source billing and client management software
Role in this project:Back-end Developer
Back-end DeveloperContributions:1 release, 22 reviews, 495 commits in 1 year 8 months
Contributions summary:Yağızhan primarily worked on fixing bugs and making improvements to the BoxBilling software. Their contributions involved modifying PHP files within the `src/bb-modules` directory, focusing on support and service domain functionality. The user's commits also addressed database-related issues, specifically concerning compatibility with newer versions of MySQL. Additionally, they removed code related to license checking and updated the software's installation process.
hostingpaymentsjump-inboxbillingmysql
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