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
Agile (Scrum), Software Development DDD
Time Management, Problem Solving, Teamwork
Vue, Nodejs
Docker, Docker Compose
Perl, Go, RabbitMQ, Kafka
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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