Dmytro K.
Offer Dmytro work on your next project.
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Offer work 
Odessa,
Ukraine
1 hour 7 minutes back
responds within a couple of hours
available for hire
6 Safes completed
1 day 2 hours back
6 clients
41 proposals made
on the service 1 month 4 days
Rating
Language proficiency level
Українська: fluent
English: intermediate
Skills and abilities
Programming
Administration
Portfolio
- All works 8
- C & C++ 1
- Python 2
- Javascript and Typescript 1
- Desktop Apps 1
- Data Parsing 1
- Bot Development 2
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90 USD Development of a map parser and creation of a GUI application
Data Parsing
Successfully implemented a large-scale and technically complex data collection project (Web Scraping) from the interactive map of the Urbexology website and developed accompanying software.
What was implemented:
1. Adaptive scanning algorithm (Quadtree Bounding Box): Created a recursive algorithm for traversing the entire globe, which allowed for the collection and deduplication of 597,306 unique locations.
2. Deobfuscation and reverse engineering: Successfully decrypted the custom protection algorithm of the website (XOR + Caesar shift), as well as mathematically restored the actual coordinates of points using sine/cosine index formulas.
… 3. High-performance multithreaded detail collection: Developed and optimized a 25-thread engine (ThreadPoolExecutor) with safe delays for collecting discussions, comments, and photos without blocking.
4. Relational database: All data structured, linked (Foreign Keys), and stored in an optimized SQLite file (.db) with configured indexes for instant search queries.
5. Premium GUI application (EXE): Developed a native Windows application based on Tkinter in a stylish dark design (Premium Dark Mode) for automatic downloading of media files (65,818 photos) to the local disk. The application supports Pause/Resume, full Stop with state saving, limit selection, and detailed real-time logging.
Project results:
Unique locations collected: 597,306
Photos found: 65,818
Discussions processed: 66,301
Tools: Python, Tkinter, PyInstaller, SQLite, Multithreading, OOP.
#web_scraping #scraping #python #gui #sqlite #reverse_engineering #automation #multithreading #parser #crawler
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564 USD ADM Window Ghost — a utility for protecting windows from screen capture
Python
Desktop application for Windows that hides selected windows from screen capture during demonstrations (screen sharing). The user selects any window — and it becomes invisible to screen recording and streaming programs (Zoom, Teams, Discord, OBS, etc.), while remaining fully visible and interactive on the monitor.
Technology stack:
• Python + PySide6 (Fluent Dark UI)
• Win32 API (SetWindowDisplayAffinity, cross-process shellcode injection)
… • ctypes, psutil, DWM API
• Nuitka (standalone compilation)
• MSIX package (Advanced Installer) — published in Microsoft Store
Key features:
• One-click window protection from the system tray
• Global hotkeys
• Automatic detection of screen sharing programs
• Minimal resource consumption
• Fully offline — no data collection
#Python #PySide6 #Win32API #Windows #DesktopApp #MicrosoftStore #Privacy #ctypes #MSIX
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564 USD ADM System Boost — system and memory optimizer.
C & C++
Development of a high-performance desktop utility for deep optimization of Windows 10/11, written in Python (PySide6) with integration of a fast C++ core for low-level work with the NT API.
Key features of the project:
1. Memory cleaning: Direct access to NtSetSystemInformation is implemented for safe cleaning of Standby RAM lists and freeing memory for heavy games and software.
2. System timer adjustment: The utility allows dynamic enhancement of the system timer accuracy to 0.5 ms via NtSetTimerResolution, significantly reducing input lag.
… 3. Hardware and registry tweaks: Safe management of the "Ultimate Performance" power plan and toggling HAGS and HPET through bcdedit is integrated.
4. Premium interface: The design is executed in the modern style of Microsoft Fluent Design (dark theme, smooth micro-animations, glass card effects).
5. Background mode: Operation in the Windows tray, process exception system, and flexible configuration of monitoring intervals.
The project has successfully passed a security technical audit and is optimized for publication in the Microsoft Store (MSIX Package).
#desktop #windows #python #pyside6 #cpp #developer #optimizer #latency #fluentdesign #software #uadesign #coding
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45 USD Computer Vision bot for racing simulator (Python / OpenCV)
Bot Development
Development of an autonomous pixel bot based on computer vision for automating the perfect start in a racing simulator. The program analyzes a specified screen area at a high frequency (100+ FPS) and emulates hardware key presses/releases with millisecond accuracy.
Implemented technical solutions:
1. Bypassing Fullscreen Exclusive: A transparent UI overlay (Tkinter) with forced focus has been developed for convenient visual highlighting of the scanning area over the game, eliminating the need to manually input coordinates.
… 2. Optical weather filter: The algorithm ignores visual noise (raindrops, dust). Gaussian blur (cv2.GaussianBlur) and hard binarization (cv2.threshold) are applied — the bot reacts exclusively to massive pixel shifts (takeoff of the starting line).
3. Multithreading: Screen capture via the ultra-fast dxcam API and image processing are offloaded to a separate daemon thread, keeping the GUI fully responsive.
4. Dynamic key-binding: Global hooks (keyboard) allow the user to assign any keys (or mouse buttons) for controlling the bot "on the fly," with settings saved in config.json.
Technology stack: Python, OpenCV, DXcam, Win32API, PyDirectInput, Tkinter, Nuitka.
#python #opencv #computervision #automation #bot #scripting #nuitka
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56 USD Free delivery counter for Khoroshop (Vanilla JS)
Javascript and Typescript
Business task:
Development of a tool to increase the average order value (Upsell) in the online store. The user should visually understand how much more they need to add to their cart to qualify for free shipping.
Technical challenges:
… The store operates on a closed platform (Khoroshop) without access to backend logic and template source files. The cart updates dynamically via AJAX, and the layout significantly differs on PCs (tables) and smartphones (flex blocks).
Implemented solution (Stack: Vanilla JS, CSS3, DOM API):
1. A lightweight, independent script was written in pure JavaScript (Zero dependencies), which easily integrates through the admin panel.
2. Price change tracking was implemented using MutationObserver for maximum performance and battery saving on mobile devices.
3. A system of "smart wrappers" was developed: the script automatically analyzes the DOM tree and adjusts its structure (or , or ) to avoid breaking the platform's native flex and grid containers.
4. Responsive layout (Pixel-perfect) was created that perfectly fits into the store's UI kit.
5. Custom confetti animation was added on Canvas for positive emotional reinforcement for the buyer upon reaching the goal.
Result:
A seamlessly integrated cross-platform widget that works without conflicts with the Khoroshop core and motivates buyers to increase their order amount.
#javascript #frontend #khoroshop #upsell #ecommerce #webdev #vanillajs #domapi #frontenddeveloper
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90 USD Low-level RTSP video streamer for Raspberry Pi 5
Python
A highly reliable background system service based on Python has been developed and successfully deployed for the Raspberry Pi 5 platform running Linux OS.
The main task of the software is high-speed capture of raw MJPEG video streams from USB ports (external HDMI capture cards and webcams) and stable streaming via RTSP protocol to static addresses on the local network with minimal latency.
… Key technical solutions and features of the project:
1. Hardware optimization of the video pipeline: Fine-tuning of FFmpeg buffering parameters. As a result, the network video latency has been reduced to a physical minimum (less than 100-150 ms).
2. Dynamic hardware detection: Integration with the v4l2-ctl utility at the Linux kernel level. The script automatically scans the ports, recognizes connected capture boards, and dynamically incorporates them into operation. A cross-platform compatible fallback has been implemented to simulate devices in a Windows environment.
3. Extreme fault tolerance: The architecture is built on isolated StreamWorker threads managed by a central supervisor StreamManager. An automatic recovery mechanism for the video core has been implemented in case of stream failure or cable disconnection using exponential backoff delays.
4. Safe OS process management: Proper cleanup of zombie processes at the Linux operating system level has been implemented through the creation of isolated process sessions and the application of system signals to process groups (os.killpg with SIGTERM/SIGKILL flags). This completely eliminates memory leaks during restarts.
5. Built-in hardware telemetry: Continuous non-blocking monitoring of CPU load has been configured, along with direct reading of temperature sensor metrics from the Raspberry Pi chip in the system kernel zone (/sys/class/thermal/thermal_zone0/temp) to prevent throttling.
The project is fully autonomous, designed as a background daemon, and starts automatically upon device boot or after power interruptions.
#Python #Linux #FFmpeg #RaspberryPi #RTSP #StreamingVideo #SystemProgramming #Subprocess #Architecture
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System Booking Architecture | Telegram Bot + SQLite + Asynchronous
Bot Development
Design and development of business logic for a service sector Telegram bot (automated client scheduling). Instead of a template script, a full-fledged and scalable architecture has been implemented, capable of handling high loads.
What has been implemented under the hood:
… Asynchronous engine (aiogram 3.x): The bot instantly responds to user actions, without blocking during simultaneous requests from dozens of clients.
Database design (SQLite): A reliable database structure has been developed for managing the master’s schedule, tracking available slots, and storing booking history.
State management (FSM): Protection against "foolishness" has been implemented — the bot clearly guides the client through the funnel from date selection to booking confirmation, preventing logic breaks.
Background automation: Integration of a task scheduler for timely sending of reminders to clients and freeing up the administrator's time.
#python #telegrambot #aiogram #sqlite #automation #backend #botdevelopment
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Native Windows utility (Advanced Dark Mode) | MS Store Release
Desktop Apps
Development of a system utility for Windows 11 from scratch to final publication. The project is created using C# and deep integration with system APIs.
The main value of the case is that the application successfully passed rigorous security, stability, and performance certification by Microsoft engineers.
… #csharp #windows #desktop #optimization #fluentdesign
Reviews and compliments on completed projects 6
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Real expert -
Craft master -
Quick answers -
First-class quality -
Nice communication -
High responsibility -
Great price -
Lightning fast
4 June
135 USD
Development of a Telegram bot with poker tests/quizzes
Quality
Professionalism
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Initiative, active performer. My problem is that I wrote the technical specification poorly. And it's difficult to change something in the process.
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1 June
68 USD
Parsing location map
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I recommend for collaboration! He quickly and efficiently compiled a database of 600 thousand units.
21 May
41 USD
Script for a niche game created in Unity
Quality
Professionalism
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I highly recommend, easy to communicate, quick to get it done, great price.
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Very satisfied with the collaboration 🙂 Everything was done quickly, qualitatively, and exactly as we wanted. The freelancer was always in touch, very loyal and attentive to all our edits, clarifications, and improvements, and executed everything at the highest level. We are very pleased with such quality work and that everything was done really quickly) Definitely recommend for collaboration!
18 May
90 USD
Raspberry pi rtsp pipeline
Quality
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Operational work, although without a super result, everything is functioning.
Pavlo Ivanenko
| Personal | Response review
8 May
23 USD
Excel VBA: non-standard calculations and rounding
Quality
Professionalism
Cost
Contactability
Deadlines
I am very satisfied with the collaboration. The performer quickly understood the essence of the unconventional task and implemented a stable solution for Excel/VBA with support for parentheses and cascading rounding after each mathematical operation.
The code is written correctly, everything works properly and without failures. I would like to especially note the good technical understanding of the task, quick feedback, and willingness to consider nuances.
I recommend them as a strong specialist in Excel and VBA automation.
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