Andrii Pasichnyk

Software Architect

Rivne, Ukraine UTC+2
apasichnik9@gmail.com linkedin.com/in/pasichdev github.com/pasichDev

Profile

Software engineer and architect working across the stack — from C++ system services on Windows and Go backends to Android and cross-platform apps in Kotlin, Swift and Flutter. Comfortable low-level (memory and concurrency, native Windows APIs, custom cryptography, TCP/UDP/RPC) and at product level (clean architecture, offline-first sync, real-time transport). Focused on clean, maintainable code and design that holds up as a project grows.

Experience

Software Engineer

2026 — Present
InTallyCon · Full-time

Flutter / Dart Developer

2023 — 2024
NosoCoin Ecosystem · Freelance & Open Source
  • Developed SovaWallet, a cross-platform crypto wallet with adaptive UI for mobile/desktop.
  • Migrated core blockchain logic (Pascal-based) to modern Dart, including custom cryptographic algorithms and protocol operations.
  • Implemented Dart FFI bindings for C++ libraries to ensure performance and security.
  • Designed robust networking for distributed nodes (balancing, failover, background syncing).
FlutterDart FFIC++

Android Developer

2021 — Present
Self-Employed · My Notes & Applied Projects
  • Built My Notes (10k+ downloads), an offline notebook with custom block-based editor engine (no 3rd party libs).
  • Implemented Clean Architecture with MVVM, Hilt, and Room (complex migrations, caching).
  • Integrated Google Maps API for custom tracking, geocoding, and route generation features.
  • Optimized rendering performance for large lists and complex UI using RecyclerView and custom Views.
KotlinJetpack ComposeRoom

Web Developer

2015 — 2020
Freelance
  • Full-stack development for REST APIs, admin panels, and SaaS tools using PHP, JS, and SQL.

Technical Skills

Systems & Backend

C++ (Windows services, WireGuard-NT, Win32/IPC, BCrypt/CNG, memory safety), Go (REST, encryption at rest, reproducible builds, SQLite without cgo).

Mobile & Cross-platform

Kotlin / Java Swift Flutter / Dart

Architecture & patterns

Clean Architecture, SOLID, MVVM, MVI, State Management (Bloc/Riverpod), Dependency Injection (Hilt).

Networking & Data

REST, WebSocket, gRPC, TCP/UDP, SQLite (Room/Drift), Firebase, Protocol Buffers, PostgreSQL (basic CRUD, joins, indexes).

Android Native

WorkManager, Services, CameraX, BLE, NFC, Custom Views, Gradle, Proguard/R8.

Ukrainian Native
Russian Fluent
English Intermediate (Technical)
Document fingerprint —