Андрій

Andrii Pasichnik
Mobile & Cross-Platform Developer

Mobile and cross-platform developer with over 4 years of hands-on experience in
Android and Flutter development.

Experienced in building and publishing production-grade applications, including
cryptocurrency wallets, system integration tools, and high-performance mobile
apps.

Strong technical background in networking, cryptography, and cross-platform
architecture.

Hands-on experience with application publishing workflows and CI/CD pipelines
using GitHub.

Phone Email GitHub
[відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація») https://github.com/pasichDev

Experience

Linqora
Apr 2025 – Present

Designed and developed Linqora, a cross-platform system that connects desktop and
mobile devices for remote monitoring and control.

Developed Linqora Remote, a Flutter-based mobile client for Android and iOS,
providing real-time access to system statistics and remote controls.

Implemented Linqora Host, a desktop application written in Go, responsible for
system monitoring, command execution, and client communication.

Designed a real-time communication layer using WebSocket with TLS encryption
for secure device interaction.

Implemented mDNS-based local network discovery to enable automatic detection of
available hosts within the local network.

Added features for monitoring system resources, controlling media playback and
system volume, and executing power management actions (shutdown, reboot, lock).

Focused on reliability, security, and extensible architecture to support future
features such as secure file transfer between devices.

Independent Mobile Developer (Client Projects under NDA)

2022 - Present

• Built a photography application with intelligent portrait-focused framing and
predefined composition zones to improve photo quality and user experience.

• Developed a social networking application for travelers featuring map-based
posts, location-based content, and route building.

• Integrated Google Maps APIs for geolocation, routing, and spatial data
visualization.

• Implemented real-time chat functionality with end-to-end encrypted messaging.

• Worked extensively with Firebase services, including authentication, real-time
database, cloud storage, and push notifications.

• Implemented camera functionality using CameraX for media capture and processing.

• Developed a high-performance news application handling large data sets with
efficient caching, pagination, and offline-first data processing strategies.

NosoCoin ecosystem / Flutter Developer
Jan 2023 - Apr 2024

Developed a full-featured cross-platform cryptocurrency wallet with adaptive UI
and support across Android, iOS, macOS, Linux, and Windows.



Re-implemented core parts of the NosoCoin ecosystem: migrated Pascal-based logic
to modern Dart, including cryptographic algorithms and protocol operations

Worked with Dart FFI, C++ and legacy Pascal code to ensure correct cryptographic
integration and stable native performance

Designed networking logic for unstable distributed nodes: handled node
balancing, failover, and long-running background operations

Designed and implemented NosoDart, a Dart library that provides a complete set of
tools for interacting with the NosoCoin protocol.

Implemented core protocol models and functional classes for wallet key
management, including key generation, handling, and validation.

Developed a ready-to-use networking layer for communication with distributed
network nodes via the native protocol, including request construction and
response parsing.

Implemented cryptographic utilities for message signing, verification, and other
secure cryptographic operations required by the protocol.

Focused on clean architecture, reusability, and reliability to support both
application-level usage and future ecosystem extensions.

Skills
Architecture & State

Clean Architecture · SOLID

MVVM · MVI · State Management (Provider / Riverpod / BLoC)

Mobile & Cross-Platform

Flutter · Dart

Android & iOS (cross-platform delivery)

Desktop support (Windows · Linux · macOS)

Networking

REST · WebSocket · TCP/UDP · RPC

Data & Storage

SQLite · Hive

Offline-first data strategies

Security

Cryptography fundamentals

AES / RSA

Argon2

Secure key handling

Backend & Services

Firebase (Auth, Firestore, Realtime Database, FCM, Crashlytics)

Media & Device APIs

Camera integration

Media playback

CI/CD & Tooling

CI/CD (GitHub Actions)

Git (GitHub)

Flutter tooling & build pipelines

Languages

Dart · Kotlin · Java · Go · C++