Joanna Z.

Mobile Developer

335 dollar
13 years

My experience


PocketworksNovember 2018 - Present

* Creating new and maintaining existing applications:
- Swift application for football referees, allowing them to watch clips from Premier
League matches; fixing CoreData and implementing automatic refreshment of new data.
- Objective-C application communicating with external survey equipment via WiFi and TCP sockets - extending transfer of pdf reports and images between iOS device and survey equipment.
- New Swift application for use during gin distilling experiences; work included setup and use of the Firestore backend.
- New Swift application for construction company allowing custom drawing on the background maps, capturing data, generation of pdf files and exchanging data and files with backend.
- Application for storing up to date documentation - refreshment of UI, creation of new
PDF documents preview based on PDFKit. Introduced Swift into Objective-C application.
* Tech stack: Objective-C, Swift, CoreData, XCTest, Firestore, Core Graphics, PDFKit, using REST API via URLSession, CocoaPods

The Floow LimitedAugust 2017 - November 2018

* Extending functionality of Telematics SDK for iOS - major rewrite and creation of the second version of the SDK.
* Implementing functionalities in the core library used in the telematics applications:
- Automatic detection of car accidents
- Incremental synchronization of user data
- New diagnostic logs system with custom encryption and automatic logs retrieval
- Implementation of better security of the network communication (SSL pinning, certificate revocation handling)
- Some aspects of handling BLE devices in the applications
* Bugfixing existing telematics applications
* Working on a new application - responsible for a leaderboard module
* Tech stack: Objective-C, Swift, PromiseKit, CoreData, CoreBluetooth, XCTest, CoreCrypto, some C/C++ and Python (logs decryption), CocoaPods - also creation of new pods.

Techstars Startup WeekendNovember 2017 - November 2017

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The Software HouseNovember 2015 - August 2017

* Creating native iOS apps, using: Swift, Core Data, Google Maps SDK, Firebase, Core
Location, Auto Layout, interactions with REST services
* Involved in creation of the following apps:
- Bilingual (English and Arabic) application for ordering courier deliveries and local shopping with home delivery; worked in a team
- Internal application for employees vacations management; worked in a team
- Application for media agency from UK, used by journalists for fast upload of photos and videos; worked alone

- Three loyalty applications based on the modular framework provided by the client; one of them, for Norwegian bank, needed extensive rebuild of several components; worked alone
* UI design of a loyalty application
* Involvement in many production phases - collecting requirements from client, UI/UX
design, implementation of features, upload to AppStore

AccentureDecember 2014 - October 2015

* Creating native iOS apps in Objective-C, using Core Data, RestKit
* Creating website for NGO in France (Drupal 7)

TomTom Polska Sp z o.oMarch 2014 - November 2014

* Describing details of TomTom display products (2D City Maps, 3D Landmarks, Advanced City Maps)
* Redesigning product data
* Design of new visualisation products (2D City Maps)
* Creating data samples of the new/redesigned products

TomTom Polska Sp z o.oApril 2013 - February 2014

* Performing automatic tests
* Deployment of system components using Puppet
* Administration, maintenance and development of new functionalities of the documentation platform based on MediaWiki
* Creating MediaWiki extensions in PHP
* Implementing automatic conversion of existing documentation to the MediaWiki format
- programming in Python
* Technical support for the Documentation&Training Developers Team

TeleAtlas Polska Sp.z.o.o.June 2010 - March 2013

TomTom Polska Sp.z.o.o. / TeleAtlas Polska Sp.z.o.o.,
* Creating documentation of map production processes, procedures and methods.
* Creating tool manuals and e-learning courses.
* Administration, maintenance and development of new functionalities of the documentation platform based on MediaWiki
* Creating MediaWiki extensions in PHP
* Implementing automatic conversion of existing documentation to the MediaWiki format
- programming in Python

APN PromiseJanuary 2013 - January 2013


Infosys BPO Poland Sp z o.oAugust 2008 - June 2010


Helion S.A.January 2008 - January 2008

My stack



Analysis methods and tools

JIRA, Agile Methodology


Apple iOS SDK

IT Infrastructure

Git, iOS


Swift, HTML, Objective-C, C++, XML


Drupal, REST API, RestKit, BlueTooth Low Energy, Software Engineering


2D, UML/OMT, iOS developer, Automatic Testing, Geographical Information Systems, Junior software engineer, Translator of IT, Arabic, Secure Socket Layer, Object Oriented Analysis/Design, Accounting Associate, Documentation & Training Developer, Specification Engineer, a leaderboard module, Commercial Skills, Scrum Methodology, Python Programming, Technical Coach, Requirements management, Data Encryption, User Experience Design, User Interface Design, Apache Subversion, 3D, C Programming Language, English, Telematics, Polish, Wi-Fi, Personal Home Page, Portuguese, German, Cascading Style Sheets, IT projects management, Objective C

Environment of Development



Mediawiki, Teamwork, Technical Support

My education and trainings

Bachelor of Engineering, Computer Sciences - Technical University of Lodz2008 - 2012

Geographical Information Systems - Jagiellonian University2008 - 2010

Inter-faculty Studies - University of Warsaw2001 - 2007