// hello world!

Piotr
Pietrzak.

$ whoami - iOS · frontend · IoT engineer. 20+ years in the trade.

Building smart access systems and agent-paired development workflows from the Netherlands.

./connect.sh ./projects --list

scroll ↓

// toolkit

The toolkit

From native iOS to IoT prototyping. These are the tools I ship with.

iOS/

Swift SwiftUI UIKit async/await Combine Core Bluetooth Core NFC CoreLocation MapKit WidgetKit App Clips SPM RxSwift Objective-C

Frontend/

TypeScript React 19 MUI Jotai SWR React Hook Form Vite Vitest MSW

Architecture/

Clean Architecture MVVM SOLID TDD Swift Testing XCTest TCA

Tools/

Git Fastlane Bitrise Jenkins CI/CD GraphQL Firebase Azure MSAL Google Maps SDK Raspberry Pi Figma Scrum

Agent Stack/

Claude GPT Codex Gemini MCP Skills Subagents Orchestration REST Paperclip

// projects

Projects

Consumer apps, SDKs, and banking platforms for millions of users.

Solo iOS · Skopei

Topology

Smart access app for vehicles, offices, bikes, and boats. Full SwiftUI rebuild, BLE/NFC lock integration, Google Maps.

SwiftSwiftUIBLENFCMaps

SDK Architect · Skopei

SkopeiConnectSDK

Swift Package for third-party Bluetooth/NFC smart lock integration. API design, BLE layer, developer docs.

SwiftSPMBLENFCAPI design

Frontend Co-owner · Skopei

Connect Portal

Admin platform managing smart access infrastructure across the Netherlands. React 19, TypeScript, MUI v7.

ReactTypeScriptMUIVite

IoT Prototyping · Skopei

BLE Beacon PoC

Raspberry Pi-based Bluetooth smart access prototyping. Signal analysis, proximity triggers, hardware validation.

Raspberry PiBLEPythonIoT

Senior iOS · Bank Pekao

PeoPay 4.0

Main mobile banking app built from scratch in 6 months. Millions of users. MVVM-C, RxSwift, automated CI.

SwiftRxSwiftMVVM-CXCTest

iOS Lead · Raiffeisen

Mobilny Portfel

Full banking app delivered in under 6 months. Clean VIP architecture, programmatic UI, Jenkins CI.

SwiftVIPJenkinsiOS lead

./more.sh

PiotrPietrzak.