Ivan

Ivan Zinkovskyi
Software Engineer (Kotlin Multiplatform & .NET) | Lviv, Ukraine

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Professional Summary

Accomplished Software Engineer with 3.5+ years of experience specializing in high-
performance native Android development, Kotlin Multiplatform (KMP) architectures, and
backend systems (.NET / ASP.NET Core). Well-versed in bridging the gap between hardware,
low-level OS services, and AI/ML models.

Proven track record of taking complex IT products from initial concept to scalable MVPs, with a
strong focus on cost optimization and application stability (maintaining 99.5%+ Crash-Free
Users on production apps with 100k+ downloads).

Demonstrates deep expertise in:

On-Device AI & System Services: Architecting real-time monitoring solutions using
Android Accessibility & Foreground Services, and deploying privacy-first, low-latency AI
pipelines (TensorFlow Lite, Ollama, Whisper.cpp) directly on client devices.
Multiplatform Architecture: Establishing a Single Source of Truth for production-
grade cross-platform apps using Kotlin Multiplatform (KMP) and Compose
Multiplatform, drastically reducing code duplication across targets.
Full-Stack & Hardware Integration: Designing scalable backend REST APIs (.NET
Core, Entity Framework) and developing custom software-to-hardware communication
layers (Python, C/C++ Arduino) for IoT setups.

Technical Stack

Languages: Kotlin, C#, SQL, Python, C/C++ (Arduino)
Frameworks & Platforms: .NET / ASP.NET Core, Jetpack Compose, Compose
Multiplatform, Kotlin Multiplatform (KMP), Android SDK, Unity
Architecture: Clean Architecture, MVI, MVVM, Single Source of Truth, REST API
Design
Libraries & DI: Coroutines, Flow, Koin, Dagger Hilt, Ktor, Retrofit, Room (SQLite),
Navigation, Entity Framework
Specialized Android: Accessibility Service, Android Health (Health Connect),
Foreground Services, CameraX
AI / ML: Local LLMs (Ollama), Whisper.cpp, TensorFlow Lite (NLP), Google ML Kit
(Barcode recognition)
 Testing: JUnit, Mockk, Unit Testing

Experience
LeadMeNot | Lead Android Developer
#1 Parental Control & Digital Wellness App for Adult Content Blocking
100k+ downloads, 4.6★

WEBSITE GOOGLE PLAY

August 2024 – Present
Kotlin Jetpack Compose Accessibility Service Foreground Services TensorFlow Lite
MVI

Core Architecture Overhaul: Architected and executed a strategic rewrite of the
application's core functionality from scratch, shifting the heavy content monitoring logic
from the backend directly to the client side (on-device processing). This pivotal
milestone drastically reduced server infrastructure costs and maximized application
responsiveness.
Application Stability Optimization: Identified, debugged, and resolved critical
architectural bottlenecks and edge-case memory leaks in long-running background
processes, successfully raising the Crash-Free Users metric from 94% to an
outstanding 99.5%+.
Modularization: Designed and implemented a robust Multi-Module Architecture,
successfully decoupling features, optimizing incremental build times, and streamlining
future maintenance and scalability for the development team.
On-Device AI Integration: Integrated TensorFlow Lite to establish a highly accurate
on-device semantic NLP text analysis pipeline, significantly improving monitoring
quality and boosting overall user experience while keeping data private.
Google Play Compliance: Successfully adapted the application's sophisticated
background monitoring layer, Foreground Services, and technical flows to fully comply
with strict Google Play policies and requirements.
Real-Time Interception: Engineered a low-latency interception mechanism for screen
text nodes utilizing the Accessibility Service for continuous, seamless content
filtration.

OneVital | Android Developer
Health-Tracking Application Prototype & MVP Foundation

April 2025 – Present
Kotlin Jetpack Compose Health Connect Dagger Hilt MVVM Clean Architecture
 PoC Solidification & Business Defense: Independently developed a high-stakes
Proof of Concept (PoC) leveraging Health Connect data aggregation. Partnered
directly with the CTO to present and successfully defend the prototype to the client,
securing the budget and approval for full-scale MVP development.
MVP Foundation & Modular Architecture: Co-authored the core foundation of the
application, designing a scalable Multi-Module setup using MVVM and Clean
Architecture to ensure clean boundaries as the development team expanded.

High-Performance Custom UI: Extensively utilized Jetpack Compose Canvas APIs to
render highly optimized, smooth custom graphic components and medical-grade health
dashboards, avoiding unnecessary recompositions.

Cross-Functional Synchronization: Actively participated in backend REST API
design and endpoint architecture definition to ensure mobile-friendly data streaming.
Mentored and onboarded the iOS engineering team, guiding them through the
established domain logic, business rules, and Android implementation nuances.

Git Flow & Development Pipeline: Established and maintained a strict Git branching
strategy, streamlining parallel feature development for multiple engineers and mitigating
integration conflicts.

Feature Integration: Implemented accurate barcode recognition using Google ML Kit
and CameraX for swift product-level health data mapping, successfully bringing the
application to a polished MVP release.

HebronSoft
Software Engineer (Kotlin Multiplatform / Android / .NET)

December 2022 – Present

Kotlin (Android & Multiplatform) Engineer | January 2024 – Present

Kotlin KMP Compose Multiplatform Ktor Room Clean Architecture

Engineered shared business and UI layers using Kotlin Multiplatform (KMP) to
eliminate code duplication and maximize core reuse across platforms.
Developed modern, declarative user interfaces using Jetpack Compose and
Compose Multiplatform for cross-platform targets.
Architected dependency injection modules using Koin and enforced strict Clean
Architecture principles to maximize long-term codebase maintainability.

Cross-Platform Enterprise HRMS App

Kotlin KMP Compose Multiplatform C# .NET ASP.NET Core Ktor Room

Architecture & Shared Logic: Engineered shared business and UI logic using Kotlin
Multiplatform (KMP), establishing a Single Source of Truth across mobile and desktop
clients while significantly reducing code duplication.

Data & Networking: Implemented cross-platform data persistence with Room (SQLite)
and secure networking via Ktor, ensuring seamless real-time synchronization between
client and server layers.
PlateAI | Fitness & Wellness App | KMP App Developer

Kotlin KMP Compose Multiplatform Ktor Coroutines Flow MVVM

Plate AI R&D — HebronSoft

Asynchronous Data Flow: Engineered highly reactive cross-platform data streams
between business and platform layers using Kotlin Coroutines and Flow, drastically
reducing boilerplate and improving state management predictability.

Multiplatform UI: Developed a cross-platform fitness tracking system featuring uniform
business logic and reactive, custom-tailored user interfaces across Android and
Desktop targets.

Embedded Software Developer | May 2024 – July 2024

C/C++ Arduino IDE Robotics Hardware Integration

ESP-NOW — Direct Data Exchange Between ESP32 (Mesh without WiFi)

AD8232 - ECG sensor + Arduino
3D Printing R&D — HebronSoft

Developed embedded software solutions for specialized hardware and robotics
prototypes using Arduino IDE and C/C++.

Integrated low-level sensor frameworks, managed hardware interrupts, and optimized
memory-constrained code.

Dwall-E | AI & Embedded Systems Engineer

Python Ollama Whisper.cpp C/C++ Arduino IDE Google API Integration

AI Innovation in IoT — HebronSoft R&D Showcase

Dwall-E Case Study — HebronSoft
Architected from scratch and delivered an MVP of an interactive voice-controlled
hardware companion, integrating microcontrollers with local AI pipelines.

Implemented on-device automatic speech recognition (ASR) using Whisper.cpp and
integrated open-source local LLMs via Ollama for real-time offline processing.
 Developed custom hardware-to-software communication layers and automated real-
time appointment scheduling workflows using Google Calendar API.

Unity Game Developer & Designer | March 2024 – July 2024

C# Unity Game Design Bitbucket Version Control

VR R&D — HebronSoft
Designed and developed interactive gameplay mechanics and core systems within the
Unity engine using C#.
Maintained source control workflows and collaborated within feature branches using
Bitbucket.

Back-end Developer | December 2022 – February 2024 (Part-time)

C# .NET ASP.NET Core Entity Framework REST API

Designed and optimized scalable backend REST APIs using C# / ASP.NET Core,
handling core business logic, user authentication, and request validation.
Modeled relational databases and managed efficient data access layers utilizing Entity
Framework and SQL.

Education

O.M. Beketov National University of Urban Economy in Kharkiv
Graduated with Honors | Bachelor’s Degree in Computer Science &
Management

January 2021 – June 2025

Core Focus: Software Engineering, IT Management, Networking, Systems Analysis,
Data Structures, Web Technologies.