Abdullah Kan

Abdullah Kan Zümrütevler, Maltepe/Istanbul, Turkey ƒ - #-ï linkedin.com/in/abdullah-kan § github.com/kan-abdullah Education Marmara University (100% English) - Graduate October 2021 - July 2025 Istanbul, Turkey Bachelor of Science in Computer Engineering Gölhisar High School of Science Ranked 1st in the Highschool, Entered top %0,5 in National University Exam (YKS) Sep. 2017 - Jul. 2021 Burdur Experience Full Stack Developer, Intern December 2024 - September 2025 Istanbul, Turkey WeChip Payment Systems — Web Development • Worked with React.js, C# / ASP.NET Core, GraphQL, and Keycloak. • Keycloak(OIDC) Integration: Implemented authentication/authorization mechanisms. • Optimized UI (React): virtualized menus and memoization; sidebar toggle time 1200ms → 350ms. • Worked within a standardized codebase using modular React components and structured ASP.NET architecture. • Integrated iyzico payment to the website, added purchase page. Blockchain Developer, Intern August 2023 - September 2023 Multicode Inf. Techs. — Solidity Development Istanbul, Turkey • Worked with Solidity, built smart contracts and deployed. • Interacting and testing smart contracts with Foundry framework. • Learnt how to use Chainlink decentralized networks for automation and transaction fees. Projects Centour.ai: AI-Powered Study Companion | React 19, Flask, PostgreSQL, Gemini API November 2025 • Developed a full-stack learning platform with a hierarchical content organization system (Studies → Topics → Chats) using React 19 and Flask. • Optimized system performance by migrating the database from MongoDB to PostgreSQL, reducing average query response times from 2s to under 0.5s through relational indexing. • Integrated Google Gemini LLM for real-time AI conversations, implementing Markdown/GFM support for high-fidelity rendering of model responses. • Built a secure authentication architecture using JWT tokens with httpOnly cookies, Argon2 hashing, and a persistent token refresh mechanism. ARIGAN: AI-Powered Error Correction System | Python, React.js, FastAPI, Gemini API May 2025 • Developed a hybrid error detection system combining a Rule-Engine powered by vector embeddings with LLMs to validate and clean complex ERP datasets. • Optimized Gemini 2.0 Flash via advanced prompt engineering, outperforming Gemini 2.5 Pro Preview (contemporary flagship) with 7x faster processing speeds and a 5% increase in accuracy in benchmarks. • Architected a multi-agent system to distribute specialized tasks (analysis, cleaning, and validation), significantly improving system scalability and response consistency. • Designed a responsive dashboard using modular React.js and FastAPI, allowing users to review AI-detected anomalies and manage data-correction workflows in real-time. Herb Market Database System | MSSQL, JavaScript, Flask November 2023 • A real-life database system for a herb seller business market named Ortaköy Aktarı, designed Enhanced Entity Relation (EER) tables for SQL database architecture. • Utilized MSSQL Server to manage customers, orders, and product data, ensuring efficient and secure data handling. Integrated stored procedures and views for data consistency. • Developed of a user-friendly interface using Flask for data input and retrieval. Technical Skills Languages/Frameworks: Java, JavaScript, React.js Python, C, C++, C# , Solidity, SQL, Foundry Developer Tools: Visual Studio, VS Code, Linux, Github, SSMS, Keycloak (OIDC) Developer Skills: OOP, SOLID, Design Patterns, Database Design, RAG-NLP, Smart Contracts, Skills Languages: Turkish (Native), English (Advanced) Tools: Microsoft Office, Blender 3D Extracurricular ACM Marmara Board Member • Communicated with companies to establish sponsorship. • Contributed organization and execution of club events. Fall 2023 - Fall 2024 Marmara University