Serhiy P.

Key Skills

Software

Roboflow

Top Subject Matter

Finance – Banking, Payments & Fintech

Software & Technology – Software Engineering & Mobile Apps

Computer Vision – Document & Barcode Detection

Top Data Types

Image

Computer Code Programming

Top Task Types

Bounding Box

Polygon

Classification

Object Detection

Computer Programming/Coding

Freelancer Overview

I am a Senior Android and backend engineer with 10+ years of experience building secure and scalable fintech applications using Kotlin, Java, Android SDK, and Spring Boot. My work has included designing KYC onboarding flows, integrating payment APIs, and implementing strong security with encryption and authentication, which requires careful testing, validation of edge cases, and clear documentation. I am now interested in AI training and data quality work, where I can use my engineering background to evaluate and improve model outputs. I am comfortable reviewing and ranking code solutions, checking step‑by‑step reasoning for technical tasks, designing realistic test cases for mobile and backend systems, and writing precise, well‑structured feedback in English to help models produce reliable, high‑quality answers.

Labeling Experience

Monopoly Card Barcode Region Detection Dataset (YOLOv8‑OBB)

ImageBounding Box

I created a custom image dataset to train a YOLOv8‑OBB model to automatically detect the barcode region on Monopoly game cards in live camera frames. The project involved designing the data collection setup, capturing images under different angles, lighting conditions, and backgrounds, and manually annotating the barcode area on each card with consistent bounding boxes suitable for oriented object detection. I defined clear labeling guidelines, file naming conventions, and train/validation splits to keep the dataset clean and reproducible. The resulting dataset was used to train and evaluate the model as part of a Monopoly companion app prototype that can quickly locate and read card barcodes during gameplay.

2026 - 2026

Education

Work History