// hello world!

Piotr
Pietrzak.

iOS & Frontend Developer building smart access systems, IoT integrations, and AI-augmented workflows in the Netherlands.

Let's connect See my work
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// tech_stack

What I work with

From native iOS through modern frontend to IoT hardware prototyping. These are the tools I use to ship.

iOS
Swift SwiftUI UIKit async/await Combine Core Bluetooth Core NFC CoreLocation MapKit WidgetKit App Clips SPM RxSwift Objective-C
Frontend Web
TypeScript React 19 MUI Jotai SWR React Hook Form Vite Vitest MSW
Architecture & Craft
Clean Architecture MVVM SOLID TDD Swift Testing XCTest TCA
Tools & Workflow
Git Fastlane Bitrise Jenkins CI/CD GraphQL Firebase Azure MSAL Google Maps SDK Raspberry Pi Figma Scrum AI agents (Claude, ChatGPT)
// recent_work

Selected projects

A few things I've worked on recently. From consumer apps to SDK design to mobile banking 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
// get_in_touch

Let's talk.

Open to interesting conversations. Remote-first, based in the Netherlands.

Connect on LinkedIn

CV and direct contact details available on request.