Semih Yalcin
Software Engineer
Istanbul
Summary
With nearly 1.5 years of experience as a QA Tester and since February 2025 continuing my career as a Backend Developer, I bring a strong combination of testing expertise and software development skills. My background includes creating and executing test plans, manual and automated testing with tools like Katalon, and ensuring product quality within Agile/Scrum environments. Currently, as a Backend Developer at Mars Athletic Club, I work on building and maintaining microservice-based systems using .NET, Entity Framework, MSSQL, MySQL, Redis, Elasticsearch, and Docker. I also design and manage Grafana dashboards integrated with Prometheus to monitor system performance
Overview
3
3
years of professional experience
Work History
Software Engineer
Mars Athletic Club
02.2025 - Current
- Contributed to backend development for membership management, contract processing, payment workflows, and user management systems.
- Developed and maintained microservices using .NET, .NET Core, Entity Framework, MSSQL, MySQL, Redis, Elasticsearch, and Docker.
- Implemented integrations to ensure seamless data flow between different environments, supporting both physical and digital members.
- Actively participated in Agile/Scrum sprint cycles, collaborating closely with cross-functional teams.
- Designed and maintained Grafana dashboards integrated with Prometheus to monitor application and infrastructure metrics, enabling proactive performance optimization and incident detection.
Software Test Engineer
Mars Athletic Club
07.2023 - 02.2025
- Company Overview: MAC, established in 2007, is a leading brand in promoting the development of sports in Turkey. By expanding its club network, it offers the latest technologies to its members and supports them in leading a better life mentally, spiritually, and physically. Additionally, through its sub-communities, it extends sports beyond clubs, strengthening the healthy living community.
- Developing and implementing comprehensive test plans, test scenarios, and test scripts for software applications.
- Working with development teams to ensure compatibility between software applications and systems.
- Performed manual and automated testing to ensure the accuracy and reliability of the system.
- Identified and reported system defects and suggested solutions.
- Performed compatibility and regression testing to ensure that changes made to the system did not introduce new defects.
- I gained experience working with Agile, Scrum and DevOps.
- Had the opportunity to do tests on the Web and Mobile side.
Intern
Prodea Information Technologies
07.2022 - 08.2022
- Company Overview: A software consultancy firm acting as a system integrator in SAP projects, providing application consultancy for all SAP products alongside hardware, system support, and hosting services.
- Prepares project documentation and user guides; I created documentation including business processes, configurations and user instructions.
- Gained experience with SAP GUI.
Education
Computer Engineering -
Dogus University
Istanbul10.2022
Skills
Katalon
Websites
Timeline
Software Engineer
Mars Athletic Club
02.2025 - Current
Software Test Engineer
Mars Athletic Club
07.2023 - 02.2025
Intern
Prodea Information Technologies
07.2022 - 08.2022
Computer Engineering -
Dogus University