Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I’m Mert Çalışkan, a QA Engineer and Software Developer based in Istanbul, Turkey. I build reliable software by combining hands-on testing with practical development, with a focus on stable DeFi and NFT platforms, cross‑platform apps, and scalable workflows. I enjoy turning ideas into polished user experiences, with a strong emphasis on UI/UX, automation, and collaboration in Agile teams. My work spans frontend and backend development, mobile apps with React Native, and robust test automation to ensure quality from code to production.…I’m Mert Çalışkan, a QA Engineer and Software Developer based in Istanbul, Turkey. I build reliable software by combining hands-on testing with practical development, with a focus on stable DeFi and NFT platforms, cross‑platform apps, and scalable workflows. I enjoy turning ideas into polished user experiences, with a strong emphasis on UI/UX, automation, and collaboration in Agile teams. My work spans frontend and backend development, mobile apps with React Native, and robust test automation to ensure quality from code to production.

Mert Çalışkan

QA Engineer, Full Stack Developer, Data Scientist, +4





I’m Mert Çalışkan, a QA Engineer and Software Developer based in Istanbul, Turkey. I build reliable software by combining hands-on testing with practical development, with a focus on stable DeFi and NFT platforms, cross‑platform apps, and scalable workflows. I enjoy turning ideas into polished user experiences, with a strong emphasis on UI/UX, automation, and collaboration in Agile teams. My work spans frontend and backend development, mobile apps with React Native, and robust test automation to ensure quality from code to production.…I’m Mert Çalışkan, a QA Engineer and Software Developer based in Istanbul, Turkey. I build reliable software by combining hands-on testing with practical development, with a focus on stable DeFi and NFT platforms, cross‑platform apps, and scalable workflows. I enjoy turning ideas into polished user experiences, with a strong emphasis on UI/UX, automation, and collaboration in Agile teams. My work spans frontend and backend development, mobile apps with React Native, and robust test automation to ensure quality from code to production.

Available to hire

I’m Mert Çalışkan, a QA Engineer and Software Developer based in Istanbul, Turkey. I build reliable software by combining hands-on testing with practical development, with a focus on stable DeFi and NFT platforms, cross‑platform apps, and scalable workflows.
I enjoy turning ideas into polished user experiences, with a strong emphasis on UI/UX, automation, and collaboration in Agile teams. My work spans frontend and backend development, mobile apps with React Native, and robust test automation to ensure quality from code to production.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Turkish

Fluent

English

Fluent

German

Beginner

Work Experience

QA Engineer at Skyrock Technology

May 1, 2025 - Present

Contributions to DeFi trading platform and NFT marketplace; ensured stability and reliability through manual and automated testing; identified functional UI/UX and console issues; documented and tracked bugs using Jira; contributed to test automation with Cypress and Playwright to improve coverage and regression speed; validated UI accuracy against Figma designs and monitored production issues via Sentry; participated in Agile (Scrum/Kanban) processes and cross-functional collaboration.

Software Development Intern at Haroon Technology

August 1, 2024 - September 30, 2024

Designed and developed a fully responsive CRM system using Django; implemented backend logic with Django ORM and full CRUD for customers, products, orders, and reviews; built front-end interfaces using HTML, CSS, JavaScript, and Bootstrap; implemented user authentication and role-based access control using Django's built-in system; documented setup, installation and deployment in a comprehensive README.

Software Development Intern at Haroon Technology

February 1, 2025 - May 31, 2025

Developed a fully responsive HR Management System using PHP (Laravel) and MySQL in a three-person team. Designed 40+ dynamic interfaces using Laravel MVC and reusable blade templates. Implemented CRUD operations and data integrations for employees, departments, and leaves; built role-based filters, paginations, and interactive UI components with JavaScript and Select2. Implemented leave and attendance tracking with automated workflows using Carbon. Resolved critical issues and ensured data integrity and security.

Full-Stack Developer (ChessNews Project) at ChessNews

October 1, 2024 - January 31, 2025

Full-stack web platform for chess enthusiasts focusing on real-time news, ELO tracking, and interactive tools such as puzzles and live broadcasts. Built with React, Material-UI, Firebase; real-time news aggregator, tracked official ELO/UKD ratings, and included cron jobs for automated ELO updates.

Project Developer (AI-Powered Exam Generator) at Exam Generator

October 1, 2025 - Present

Full-stack application that automates exam creation from PDF documents using Google Gemini AI. Generates multiple question types (MCQ, True/False, open-ended) with a responsive UI and detailed result explanations. Features include secure authentication and a responsive interface.