Summary
Overview
Work History
Education
Skills
Timeline
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Ali Erdem Akın

Senior Backend Develop
Mainz

Summary

Experienced senior backend developer specializing in designing time-sensitive microservices and optimizing scalable backend systems. Led the successful transition from monolithic architectures to microservices at CHECK24, overseeing projects focused on transaction management, including the establishment of a dedicated credit card processing service. Proficient in PHP , Symfony , Laravel , Docker , and Redis . Extensive experience with CI/CD pipelines ( Bitbucket ), Codeception and PHPUnit testing frameworks, and MySQL ( Percona ) database management. Recognized for problem-solving abilities, played a pivotal role in resolving critical issues such as a duplicate transaction bug, resulting in annual savings of €70,000 for the company. Committed to mentoring junior developers, fostering innovation, and driving performance improvements through comprehensive testing and continuous integration practices.

Overview

2025
2025
years of professional experience
3
3
Languages

Work History

Senior Backend Developer

CHECK24 Vergleichsportal GmbH
Mainz
1 2022 - Current
  • Spearheaded development and maintenance of critical APIs and modules within Payment team, strictly following Domain-Driven Design (DDD) principles to ensure high accuracy and reliability in time-sensitive applications.
  • Led Agile -driven rapid development of products, ensuring all deliverables were met within stringent timelines while upholding high-quality standards.
  • Played key role in architectural design and implementation of both monolithic and microservice-based systems , significantly enhancing scalability and system robustness.
  • Improved overall system performance across multiple projects, directly increasing service quality and efficiency by 10% to 30% .
  • Developed and maintained reusable PHP library , streamlining development processes and supporting multiple organizational services.
  • Conducted in-depth research and implemented enhancements to database performance and API efficiency , resulting in faster and more reliable applications.
  • Extensively utilized Symfony , Docker for containerization, Git for version control, and Redis for caching and data storage, ensuring adherence to modern development practices.
  • Led critical efforts in bug fixing and troubleshooting, resolving numerous high-impact issues and improving overall system stability over period of six months.
  • Played pivotal role in resolving major issue involving duplicate transactions , preventing substantial financial losses and saving company approximately €70,000 to €80,000 annually .

Senior PHP Developer

Turhost Web Hosting
Kocaeli
08.2018 - 01.2022
  • Managed development milestones from initial steps through final delivery.
  • Reviewed code, debugged problems and corrected issues.
  • Multi-tasked across multiple functions and roles to generate project results and meet deadlines and organizational expectations.
  • Regularly updated knowledge of latest industry trends in web development and related technologies.
  • Researched, tested and implemented various client feature requests to deliver internal content management systems and content delivery applications.
  • Integrated several different APIs such as Cpanel , Plesk and Litespeed to framework.
  • Wrote server-side and client-side code for Client Area and Admin Area projects using PHP , JavaScript , Vuejs , Alpinejs , Tailwindcss , Bootstrap , specifically with Laravel framework.
  • Developed back-end components to connect applications with web services.
  • Delivered drastic improvements in proprietary framework leading to 35% efficiency boost.

Software Developer

Oktotech Film Services
Kocaeli
08.2017 - 01.2018
  • Created desktop application using C# , MediaLooks SDK , Node.js , Websocket , and Xaml .
  • Developed module that adds components to living videos.
  • Designed and set up WebSocket that share live videos to allowed users on same LAN.
  • Built module that splits screen into optimal pieces using purely mathematical algorithm.
  • Software team consisting of 4 employees producing software and hardware for cinema industry with start-up culture.

Junior PHP Developer

LOGO Software
Kocaeli
11.2016 - 07.2017
  • Researched, tested and implemented various client feature requests to deliver internal content management systems and content delivery applications.
  • Regularly updated knowledge of latest industry trends in web development and related technologies.
  • Worked closely with Project Managers and other developers to define parameters and plan detailed specifications with clear project deliverables and timelines to meet strict deadlines.
  • Reduced server management costs by 4% by migrating Linux servers to Windows servers and integrating separate system with entire company system

Intern

Logo Software
Kocaeli
07.2016 - 08.2016
  • Developed simple projects in technologies such as Asp.Net , XML , XSLT .
  • Sorted and organized files, spreadsheets and reports.
  • Developed 4 different modules during internship

Education

Bachelor's Degree - Computer Engineering

Kocaeli University
Turkey
09.2012 - 2017.06

Skills

PHP, Laravel, Symfony

HTML5/CSS, Javascript

RESTful API, Socket Programming, Event Driven Systems

ORM (Eloquent), MySQL, Doctrine

Design patterns (Oop, Abstract Factory, etc)

Json, Yaml, Xml, Redis

Timeline

Senior PHP Developer

Turhost Web Hosting
08.2018 - 01.2022

Software Developer

Oktotech Film Services
08.2017 - 01.2018

Junior PHP Developer

LOGO Software
11.2016 - 07.2017

Intern

Logo Software
07.2016 - 08.2016

Bachelor's Degree - Computer Engineering

Kocaeli University
09.2012 - 2017.06

Senior Backend Developer

CHECK24 Vergleichsportal GmbH
1 2022 - Current

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Ali Erdem AkınSenior Backend Develop