Stefan Pačavra
CVLet’s talk

Novi Sad, Serbia · Mobile developer since 2018

Stefan Pačavra.
Native & cross-platform mobile developer.

Swift, SwiftUI, Flutter, and React Native. From new applications to established codebases — building and maintaining mobile experiences across teams and industries.

Selected work / 11

NDA projects · Illustrative screens

01 / Remote care · IoT

IoT caregiver monitoring app

Flutter · iOS & Android · 2025 — present

A cross-platform, white-label mobile client for remote care: caregivers and installers set up in-home sensor networks, watch live activity, and review trends.

  • BLE & Wi-Fi device setup
  • Live dashboard & trends
  • OTA firmware updates
FlutterDartRiverpodFreezedDio + RetrofitWebSocketsDrift + SQLCipherFirebasePigeon
View case study
9:41

Caregiver

Home overview

Activity todayLive
06:0012:00Now

Sensors

Sensor hub

Online · Wi-Fi

Motion tag · Kitchen

Motion 2 min ago

Motion tag · Bedroom

No motion · 1 h

Firmware update68%
Concept screen · Not client UI

02 / Finance

Flutter fintech application

Flutter · 2024 — 2025

A fintech solution built around clean architecture, structured state management, and secure API communication.

  • API communication
  • State management
  • Scalable architecture
FlutterDioBLoCGoRouterClean architecture
View case study
9:41

Overview

Available balance

€ 2,450.00

••••   ••••   4821

PERSONAL ACCOUNTVISA
SendReceive

Recent activity

Transfer received+ € 320
Card payment− € 24
Monthly subscription− € 12
Concept screen · Not client UI

03 / Pro audio · Bluetooth

Wireless microphone control app

iOS · Swift · 2025 — 2026

A native iOS app for connecting to and managing multiple wireless microphones over Bluetooth, with recording, real-time monitoring, and full microphone configuration.

  • Multiple mics over Bluetooth
  • Recording & live monitoring
  • Gain, EQ & LED control
SwiftiOSBluetoothAudio recordingHardware integration
View case study
9:41

2 mics connected

Recording

LED

Mic A

Battery 86%

LED

Mic B

Battery 72%

Gain+12 dB
MonoStereoSafety track
EqualizerVoice
602501k4k12k

Recording

00:12:48

Stop
Concept screen · Not client UI

04 / Field operations

Ski resort employee operations

iOS · Swift · 2019 — 2022

An offline-capable field tool for ski resort staff: track recording, points of interest, assignments, reports, and QR ticket control.

  • Tracks & points of interest
  • Assignments & reports
  • QR ticket control
SwiftTrack recordingPOIsQR scanningOffline operation
View case study
9:41
Resort operations

Lift inspection

Assigned · Field report

Your assignments

Tracks, POIs & reports

Ticket control
Concept screen · Not client UI

05 / Outdoor navigation

Resort trails & visitor navigation

iOS · Objective-C · 2019 — 2022

An offline-capable trail system for resorts and their visitors, with navigation, reviews, and problem reporting.

  • Resort trail discovery
  • Visitor feedback
  • Offline navigation
Objective-CTrail navigationReviewsProblem reportsOffline operation
View case study
9:41
Explore the trails

Summit trail

Trail map available offline

Trail information

Reviews & problem reports

Visitor reviews
Concept screen · Not client UI

06 / Marketplace

Car buying & selling marketplace

iOS · Swift · 2018 — 2020

A native marketplace where users publish car advertisements and find vehicles using multiple search filters.

  • Create advertisements
  • Vehicle discovery
  • Search filters
SwiftiOSListingsFiltered search
View case study
9:41

Find your next car.

Search vehicles
All carsHatchbackElectric
City hatchback€ 18,900

2021 · 42,000 km · Automatic

Sell your vehicle

Create a new advertisement

Create listing
Concept screen · Not client UI

07 / Logistics

Offline vehicle transport

iOS · Objective-C · 2018 — 2020

An application supporting vehicle transport across the state, including operation without an internet connection.

  • Vehicle transport
  • Offline workflows
  • Native iOS
Objective-CiOSOffline operation
View case study
9:41

Vehicle transport

Offline mode

Transport records

Vehicle 01

Transport in progress

RECORD · 001

Vehicle 02

Available offline

RECORD · 002

Vehicle 03

Available offline

RECORD · 003

Concept screen · Not client UI

08 / Augmented reality

AR real estate viewer

iOS · Swift · 2020 · Proof of concept

Building information, brought into the camera view. An iOS proof of concept connecting geolocation with augmented reality.

  • Camera overlays
  • Location-based identification
  • Building details
SwiftARKitGeolocation
View case study
9:41
Property lens

Building information

Riverside residence

Apartments · Property details

€ 240,000 View details ↗

Concept screen · Not client UI

09 / Delivery

Real-time package tracking

iOS · Swift / SwiftUI · 2021

Shipment tracking with real-time package updates, delivery status, and estimated arrival times.

  • Real-time updates
  • Delivery status
  • Estimated arrival
SwiftSwiftUIShipment tracking
View case study
9:41

Your shipments

Package #00482

Out for delivery

Estimated arrival

Today, 14:00 – 16:00

Order confirmed

Monday, 09:12

Package collected

Monday, 16:40

In transit

Tuesday, 08:30

Out for delivery

Today, 09:15

Concept screen · Not client UI

10 / Hybrid mobile

Native authentication & web apps

iOS · Swift / Objective-C · 2020

Commercial iOS applications combining native authentication with web-based content.

  • Native sign-in
  • Web-based content
  • Commercial applications
SwiftObjective-CNative authenticationWebView
View case study
9:41

Welcome back.

Sign in to your account

Email address
Password
Sign in

Native authentication · Web content

Concept screen · Not client UI

11 / Mobile integration

React Native in a native iOS app

React Native · iOS & Android · 2021

Integration of React Native into an existing native iOS project.

  • Existing iOS project
  • React Native integration
  • Hybrid codebase
React NativeNative iOSIntegration
View case study
9:41

Mobile workspace

One application

Two technologies

NATIVE FOUNDATION

iOS

Existing native application

↓

INTEGRATED EXPERIENCE

React Native

Cross-platform integration

Concept screen · Not client UI

Career

2010 — today

  1. 2010 — 2014

    Computer science

    High School of Electrical Engineering, Novi Sad.

  2. 2014 — 2021

    Applied Computer Science

    Faculty of Technical Sciences, Novi Sad.

  3. April 2018

    Started as a mobile developer

    Novi Sad, Serbia. Scrum teams, Git, and clean architecture with MVVM in UIKit and SwiftUI.

  4. 2018 — 2020

    First production apps

    A car buying and selling marketplace in Swift and an offline vehicle transport app in Objective-C.

    Car buying & selling marketplaceOffline vehicle transport

  5. 2019 — 2022

    Offline resort tools

    Field operations for ski resort staff and trail navigation for resorts and their visitors, both working offline.

    Ski resort employee operationsResort trails & visitor navigation

  6. 2020

    AR proof of concept and hybrid apps

    An ARKit viewer overlaying building information through the camera, plus commercial apps combining native sign-in with web content.

    AR real estate viewerNative authentication & web apps

  7. 2021

    SwiftUI and React Native

    Real-time package tracking in Swift and SwiftUI, and React Native integrated into an existing native iOS project.

    Real-time package trackingReact Native in a native iOS app

  8. 2024 — 2025

    Fintech in Flutter

    A fintech product under strict NDA, built with Dio, BLoC, GoRouter, and clean architecture.

    Flutter fintech application

  9. 2025 — 2026

    Bluetooth audio on iOS

    Native Swift app for connecting to and controlling multiple wireless microphones: recording, live monitoring, gain, EQ, and LED control.

    Wireless microphone control app

  10. 2025 — present

    IoT remote care in Flutter

    White-label caregiver app for iOS and Android: Bluetooth LE sensor setup, Wi-Fi provisioning, OTA firmware updates, and a live dashboard.

    IoT caregiver monitoring app

Background

Mobile developer since April 2018, working across different projects and teams. Experience maintaining existing applications, developing new features, and building projects from scratch, natively on iOS with UIKit and SwiftUI and cross-platform with Flutter and React Native. Recent work focuses on Bluetooth and IoT hardware integration: connecting to sensors and wireless microphones, provisioning devices, and delivering firmware updates, built on clean architecture and MVVM.

Tools & frameworks

Swift · Objective-C · Dart · Flutter · React Native · TypeScript · UIKit · SwiftUI · Riverpod · BLoC · Bluetooth LE · WebSockets · Firebase · AVFoundation · CoreData · CoreLocation · MapKit · Figma · Git · Claude · Cursor AI

Education

Applied Computer Science

Faculty of Technical Sciences
Novi Sad · 2014–2021