Hello, I'm Damian Winiarczuk, iOS developer and Apple enthusiast from Kraków, Poland. I have been programming for iOS platforms since 2011. Two years later I've started my professional career as an iOS developer in various companies. Most important projects, achievements and responsibilites you can find in listing below.

Beside programming I'm basketball lover, especially NBA, interested in music, live concerts, video games and video games industry.

I have experience with: Swift, Objective-C, RxSwift, MVC, MVVM(+C), UIKit, iOS SDKs since 3.1.3, Mapbox iOS SDK, Xcode, Git, CoreData (low), Basic C (Core Foundation APIs), Fabric/Firebase, RESTful APIs, JSON.

2020 year, Mobility.Cloud

Working on user facing native iOS applications for bike or scooter sharing networks, and utility app for mechanics and network operators. 
I was responsible for preparing existing application to communicate with a new bike controller without keypad (moving functionalities from bike to the app).

2019 year, Uber Technologies (JUMP Bikes)

After Uber’s acquisition of JUMP (2018) I joined Uber’s NewMobility team and continued work on JUMP Bikes application. I was responsible for developing new features that improve communication, reservation and unlocking process of JUMP electric bike through the app.

2015 year, Social Bicycles (doing business as JUMP)

As being part of NYC based bike sharing startup Social Bicycles (later doing business as JUMP) I was responsible for building, publishing and maintaining dedicated, user facing iOS applications capable to communicate with company's smart and electric bikes as well developing internal tool-apps. 
All of them I built and engineered from scratch, written in Objective-C and Swift such as Social Bicycles and JUMP Bikes applications.
 The former exceed one million of total downloads, the latter had more than 100k MAU. I also prepared the app for bike sharing network in Kraków - Wavelo.

2013 year, Leftbrain

Leftbrain was a software house company. It was my first job as a professional software developer. Here I was developing and publishing native iOS applications for various clients. The spectrum of developed applications goes from simple utility apps, through social media to fun and sport applications. One of them was for Polish soccer team - Wisła Kraków

  • TOIL

    Business

  • PokerLoans Pro

    Lifestyle

  • Biała Gwiazda

    Sports

  • Deciderr

    Lifestyle

2011 year, side project: Plac Zbawiciela app

Plac Zbawiciela was an application with polish bars and restaurants in Warsaw which I coded for Urban Custard ST as an indie developer during my studies. I did the coding part of the application.

Personal side projects

Here are my personal projects that I had developed for myself and decided to publish them to the App Store.

  • Lately

    Productivity

  • Cloud Hub

    Productivity