$Kaan Dinç

i build full-stack apps and desktop tools end to end, from the database up to the interface.

##about

hi, i'm kaan. computer engineer interested in the defense industry, with a BSc from Gaziosmanpaşa University (GPA 3.45/4.0) and an Erasmus term at Kielce University of Technology in Poland.

i work on a hospital information system with about 3,000 users, where rewritten Oracle SQL queries cut a typical report load from over 30 seconds to 6.5 seconds. outside work i write things from scratch: a packet analyzer and IDS in Python, a 2D physics engine in TypeScript, and full-stack and desktop apps for retail businesses, with React on the frontend and Python desktop tools backed by SQL. i've also completed the three Cisco CCNA courses.

i like owning a project end to end, from the database up to the interface, rather than one slice of it.

##skills

languagesPython, TypeScript/JavaScript, C#, C++, Java, SQL, Pascal
webReact, TanStack Start, Tailwind CSS, Zod, discord.js
dataOracle SQL, SQLite
vision / mlOpenCV, TensorFlow/Keras
games / vrUnity, VR gameplay and physics
networkingCisco IOS, VLANs, STP, OSPF, ACLs/NAT, VPN/IPsec
toolsGit, GitHub Actions, pytest, Vitest, Playwright

##experience

Abisena Information Technologies IT Specialist, Hospital Information System Feb 2025 - Present Ministry of Health · Çanakkale, Turkey
  • Query rebuild: rebuilt more than 10 queries from scratch in Oracle SQL, removing unnecessary table joins and making them more compact. loading a typical 15,000-row report dropped from over 30 seconds to 6.5 seconds, more than 4× faster.
  • Workflow tools: developed custom forms and Pascal-based document modules inside the system, used about 3,500 times per month.
  • Technical support: support about 3,000 clinical and administrative users, resolving access, data and workflow issues.
Freelance Developer 2024 - 2025 Çanakkale, Turkey
  • Retail business software: built a desktop business management application and an e-commerce website with an admin panel for a retail business (see projects).
  • Invoice application: built an invoice desktop application for a retail business that fills PDF receipt templates, tracks payment status and customer history, and numbers receipts automatically.
Acrobat Innovation Technology Unity Developer Intern Feb 2024 - Jun 2024 Gebze, Kocaeli, Turkey
  • AR textile app: developed features in Unity (C#) using Google ARCore, letting customers preview products in their own space on a mobile device.
  • Mobile interface: designed and built the app's mobile interface with Unity's UI system.
  • Recognition system: prototyped an object and environment recognition system that generated product recommendations from algorithmic and mathematical calculations.

##education

BSc Computer Engineering Gaziosmanpaşa University Aug 2020 - Jun 2024 Tokat, Turkey
  • GPA 3.45/4.0 (86.4/100). Coursework in data structures, computer networks, and database systems, with projects in Java, C#, and Python.
  • Graduation project: classified lung MRI images into diagnostic categories for COVID-19 with a CNN (TensorFlow, Keras), using pooling and dropout layers, reaching 94.5% accuracy on the test set.
Erasmus Exchange, Computer Science Kielce University of Technology Feb 2022 - Aug 2022 Kielce, Poland
  • Hands-on Cisco network setup and configuration work, plus algorithmic programming in C++ and Python.
CCNA Courses Cisco Networking Academy Nov 2025 - Mar 2026
  • Introduction to Networks: switching and routing fundamentals, IPv4/IPv6 addressing, ICMP, and core network security.
  • Switching, Routing & Wireless Essentials: VLANs, STP, EtherChannel, DHCP, WLAN configuration, and static routing.
  • Enterprise Networking, Security & Automation: OSPFv2, WAN concepts, ACLs/NAT, VPN/IPsec, QoS, and network automation.

##projects

Sentinel (Packet Analyzer / IDS) Python · pytest · CI

Packet analyzer and rule-based intrusion detection system written from scratch in Python with no runtime dependencies: hand-written parsers (Ethernet/VLAN, ARP, IPv4/IPv6, TCP, UDP, ICMP, DNS, HTTP, TLS ClientHello), PCAP read/write, TCP stream reassembly, a filter language, detectors for port scans, SYN floods, ARP spoofing and DNS tunneling, and live capture on Linux and Windows. Verified with 942 tests, 405 deliberate code mutations (all caught), a fuzzer run over 3 million inputs, and a comparison with Wireshark's tshark on 10 captures (68,756 field values, 0 unexplained differences after 3 bugs were fixed), with CI on Linux and Windows. It also ran on 2.7 million packets of real traffic, including 14.6 s of a 1 Gbps backbone, where an independent tshark recount found the same 376 scanning sources; the write-up (part 1, part 2 and part 3) is on the blog.

Impulse (2D Physics Engine) TypeScript · Vitest · Playwright

2D rigid body physics engine written from scratch with no libraries: circle, box, and convex polygon collision (SAT), a warm-started sequential-impulse solver with friction and restitution, sleeping, continuous collision, five joint types, and a spatial-hash broadphase about 42× faster than brute force at 4,000 bodies. Tall stacks settle and sleep (10-box towers in about 1 s instead of 7 s). Verified against analytic references with 171 unit tests and 14 browser tests, and shipped as an interactive browser demo.

Business Management App Python · SQLite

Desktop application for a retail business handling inventory, point-of-sale (cash and credit), customer accounts and payments, daily earnings and expenses, and PDF customer statements. Layered architecture separating data, business logic and UI, with automatic backups on startup.

E-Commerce Website TypeScript · React · Cloudflare

Full-stack website for a retail business: a public storefront with product catalog, categories and stock status, and a custom admin panel for products, discounts, homepage content and site settings. Built with TanStack Start, Tailwind CSS and Zod validation, on a SQL database (Cloudflare D1).

Invoice Application Python · SQLite

Desktop application for a retail business that fills PDF receipt templates, tracks payment status and customer history, and numbers receipts automatically.

Real-Time CV Automation Tool Python · OpenCV

Built to automate in-game minigames: screen-region object detection with OpenCV using color and contour tracking, a sub-frame-precise pattern-recognition module, and a configurable, persisted region selector.

Illusa (VR Game) Gameplay/level design

Gameplay programmer and level designer on a VR headset game: built the physics and movement behind its flight mechanics and custom gameplay systems from scratch.

##repos

sentinel Python · 0 stars

Packet analyzer and rule-based IDS in pure Python with no runtime dependencies. Hand-written protocol parsers, PCAP I/O, TCP stream reassembly, and detection of port scans, SYN floods, ARP spoofing, and DNS tunneling, with live capture on Linux and Windows.

impulse TypeScript · 0 stars

2D rigid body physics engine written from scratch in TypeScript with no physics libraries. SAT collision, a sequential impulse solver, sleeping, continuous collision, and joints, fully deterministic.

simple-volume-saver JavaScript · 4 stars

Chrome extension that controls per-site media volume, remembering each site's level and letting you reset it on demand.

Lespy Python · 3 stars

Discord leveling bot for the Respy project. Tracks XP from reply and mention activity, stores levels in SQLite, and posts level-up announcements with configurable curves and admin roles.

rejs JavaScript · 1 star

Discord bot on discord.js that monitors a FiveM game server, posting live join and leave activity to a channel and keeping a SQLite history of player sessions.

excel_file_comparison Python · 0 stars

Desktop GUI tool for diffing two Excel files with configurable column mapping, built to speed up a recurring task at work and shipped as a standalone executable.