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Patrik Vaberer

Verified Expert in Engineering

iOS Developer

Bratislava, Bratislava Region, Slovakia

Toptal member since March 31, 2016

Expertise

iOS Agile Development Objective-C Swift Google API Facebook API MySQL Firebase Jenkins Xcode JavaScript Mobile App Algorithms MacOS X (Formerly Twitter) Development Parse

Bio

Patrik is a freelance iOS developer with extensive experience in startups. His latest projects have been top-notch apps for US startups Johnson & Johnson and Telepass done in Swift. Patrik delivers top quality, pays attention to details, and is the type of person who gets things done.

Portfolio

Telepass Spa

Swift, iOS, Agile Software Development, Scrum, Cocoa Touch, Firebase, UIKit...

BabyCenter

Realm, Objective-C, Swift, Agile Software Development, Scrum, Cocoa Touch...

Reacha, LLC

Azure, Parse, Core, Swift, Google API, MySQL, X (formerly Twitter) API...

Experience

REST - 10 years
iOS - 10 years
Objective-C - 9 years
Scrum - 9 years
Cocoa Touch - 9 years
Core Data - 9 years
Swift - 8 years
Jenkins - 5 years

Preferred Environment

Git, Xcode, iOS, MacOS, Charles Proxy

The most amazing...

...project I've launched is Grideo, an app for creating social templates featured by Apple as "App of the Day" in 165 countries, listed in the best apps in April.

Work Experience

iOS Developer

2021 - 2023

Telepass Spa

Worked on a team to design and develop a new module from scratch written in SwiftUI. Met all project requirements and delivered them on time and within budget.
Collaborated closely with nine other iOS developers, providing detailed feedback on code changes and ensuring that all code met established coding standards and best practices via pull requests.
Trained and mentored junior developers, fostering a culture of knowledge sharing and continuous learning.

Technologies: Swift, iOS, Agile Software Development, Scrum, Cocoa Touch, Firebase, UIKit, REST, SwiftUI

iOS Engineer

2017 - 2017

BabyCenter

Communicated with multiple departments to deliver new features quickly.
Worked on an iOS app with a team of three iOS engineers.
Used the Atlassian software kit to get things done.
Operated within Scrum methodology with regular meetings like daily standups, sprint planning, and grooming.
Used Charles to debug RESTful APIs and help to find edge cases when the API failed.
Worked extensively with push notifications and Localytics.com to increase engagement.
Implemented a custom syncing mechanism between the back end and mobile.
Testimonial: "Patrick started adding value to our application almost immediately, and, despite working remotely, we had great communication. He was a great addition to the team, and is a great asset to any team he works with." – Alex Leite, via LinkedIn.

Technologies: Realm, Objective-C, Swift, Agile Software Development, Scrum, Cocoa Touch, Sketch 3, UIKit, REST

iOS Engineer

2016 - 2017

Reacha, LLC

Helped the client to build the MVP.
Led and designed the IT architecture to the successful release to the App Store.
Integrated Facebook, Instagram, Twitter, and LinkedIn API.
Leveraged and worked with push notifications.
Integrated Parse and Layer to build a native chat into the app.
Worked with Crashlytics for bug tracking.
Implemented extensive analytics to ensure measuring right KPIs using Mixpanel.
Testimonial: "I've been working with Patrik to create a new live business App called REACHA. We hired Patrik as lead iOS developer and he continues to work with us on many levels, managing the build and rollout of this groundbreaking business networking App. He also manages back-end resources very well and successfully works with our product and UX design team seamlessly with great attention to detail. I've worked with many developers over the last 10 years. Patrik is definitely top of my list and I look forward to working with him for many more years to come." – Grant Lyons, via LinkedIn.

Technologies: Azure, Parse, Core, Swift, Google API, MySQL, X (formerly Twitter) API, Facebook API, UIKit, App Store, REST

iOS Engineer

2016 - 2017

Johnson & Johnson

Worked on an iOS app with a team of six engineers.
Created tests to ensure quality and make sure the codebase is scalable in the future.
Operated within Scrum methodology with regular meetings like daily standups, sprint planning, and grooming.
Communicated with multiple departments to deliver new features quickly.
Testimonial: "It has been my pleasure to work with Patrik for the past few months. He is a high-performing team member that never disappoints. He is always eager to go above and beyond requirements to create a better user experience." – Diego Urquiza, via LinkedIn.

Technologies: CocoaPods, Alamofire, SonarQube, Core Data, Swift, Agile Software Development, Scrum, Cocoa Touch, TestFlight, UIKit, REST

iOS Engineer

2015 - 2016

STRV

Developed the full project in Swift.
Oversaw the whole app development cycle, including maintenance, bug fixing, and performance testing.
Collaborated with other departments to define and create specifications.
Led the development using Scrum methodology.

Technologies: AFNetworking, REST APIs, Core Data, Swift, JavaScript, BrainTree, TestFlight, UIKit, App Store, REST

iOS Engineer

2013 - 2014

Ideas2Markets

Developed the full project in Objective-C.
Implemented a fully functional iOS app from top to bottom, meeting the client's requirements.
Successfully released the final version to the App Store.

Technologies: Google Maps, AFNetworking, REST APIs, Core Data, Objective-C, MySQL, Stripe, UIKit, App Store, REST

Experience

Telepass

https://apps.apple.com/app/apple-store/id454224356

In addition to the toll, Telepass is now a world of digital services to move you in an easy and smart way. From RC Auto to managing your deadlines, expenses, and vehicles, the Telepass App is designed to simplify your every move in and out of the city.

Over 1 million people are already using it; join us too.

Velys

A Swift-based app to connect patients with doctors to help with knee surgery. I joined the team to set up the project and architecture, created MVP, and onboarded four other iOS developers to continue supporting the app.

Grideo

https://apps.apple.com/us/app/grideo-social-media-post-maker/id1500554567

Grideo is an iOS app for creating social media templates. Its unique editor allows creating beautiful posts by adding photos and text stickers and adjusting the final image with many variations. Apple featured the app.

BabyCenter

https://apps.apple.com/app/apple-store/id386022579

With millions of users, the app is ranked number one in the pregnancy category in the App Store and is constantly featured by Apple. I was responsible for creating new features (new modules) and fixing bugs.

Care4Today

Care4Today Connect is a medication management app with patients' and healthcare professionals' (HCPs) input to give you comprehensive health and wellness information beyond medication reminders.

Reacha | Business Network App

Reacha is an innovative on-demand business network that allows people to create live business cards to promote their services or products and uniquely attract new customers. With Reacha, users can create their own live business profile, which is then displayed on a map, allowing potential customers to see where they are located and what they have to offer.

Ripple

Posting and discovering global stories that matter but go unnoticed. A simple way to post a story or article and share it with others.

Wiretap

The concept behind the app is to make favorite shows re-watchable by adding a new layer of engagement for users. The app accomplishes this by sharing the cast and crew's thoughts about a particular episode, which appear time-synced with the playback. This innovative feature allows users to gain a deeper understanding of their favorite shows and connect with the creators more personally.

Font Awesome Swift

https://github.com/Vaberer/Font-Awesome-Swift

A Font Awesome Swift library for iOS. No more image icons anymore. Using this library is very easy; it has more than 700 stars. The Font Awesome Swift library for iOS is an impressive accomplishment that provides users an alternative to traditional image icons. It has more than 700 stars on GitHub.

Publication

Education

2012 - 2015

Bachelor's Degree in Computer Science

Comenius University Faculty of Mathematics, Physics, and Informatics - Bratislava, Slovakia

Skills

Libraries/APIs

X (formerly Twitter) API, Google API, Facebook API, Core Animation, REST APIs, Google Maps, Alamofire, CocoaPods, Stripe

Tools

Xcode, TestFlight, Sketch 3, Jenkins, Git, SonarQube, Charles Proxy

Languages

Swift, Objective-C, JavaScript

Frameworks

Core Data, Cocoa Touch, UIKit, SwiftUI, AFNetworking, iOS SDK

Paradigms

Agile Software Development, Scrum, REST

Platforms

iOS, Firebase, MacOS, Parse, Azure

Storage

MySQL, Realm, Databases

Other

BrainTree, App Store, Core, Apps, Algorithms, Data Structures, Programming

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Work Experience

iOS Developer

2021 - 2023

Telepass Spa

Worked on a team to design and develop a new module from scratch written in SwiftUI. Met all project requirements and delivered them on time and within budget.
Collaborated closely with nine other iOS developers, providing detailed feedback on code changes and ensuring that all code met established coding standards and best practices via pull requests.
Trained and mentored junior developers, fostering a culture of knowledge sharing and continuous learning.

Technologies: Swift, iOS, Agile Software Development, Scrum, Cocoa Touch, Firebase, UIKit, REST, SwiftUI

iOS Engineer

2017 - 2017

BabyCenter

Communicated with multiple departments to deliver new features quickly.
Worked on an iOS app with a team of three iOS engineers.
Used the Atlassian software kit to get things done.
Operated within Scrum methodology with regular meetings like daily standups, sprint planning, and grooming.
Used Charles to debug RESTful APIs and help to find edge cases when the API failed.
Worked extensively with push notifications and Localytics.com to increase engagement.
Implemented a custom syncing mechanism between the back end and mobile.
Testimonial: "Patrick started adding value to our application almost immediately, and, despite working remotely, we had great communication. He was a great addition to the team, and is a great asset to any team he works with." – Alex Leite, via LinkedIn.

Technologies: Realm, Objective-C, Swift, Agile Software Development, Scrum, Cocoa Touch, Sketch 3, UIKit, REST

iOS Engineer

2016 - 2017

Reacha, LLC

Helped the client to build the MVP.
Led and designed the IT architecture to the successful release to the App Store.
Integrated Facebook, Instagram, Twitter, and LinkedIn API.
Leveraged and worked with push notifications.
Integrated Parse and Layer to build a native chat into the app.
Worked with Crashlytics for bug tracking.
Implemented extensive analytics to ensure measuring right KPIs using Mixpanel.
Testimonial: "I've been working with Patrik to create a new live business App called REACHA. We hired Patrik as lead iOS developer and he continues to work with us on many levels, managing the build and rollout of this groundbreaking business networking App. He also manages back-end resources very well and successfully works with our product and UX design team seamlessly with great attention to detail. I've worked with many developers over the last 10 years. Patrik is definitely top of my list and I look forward to working with him for many more years to come." – Grant Lyons, via LinkedIn.

Technologies: Azure, Parse, Core, Swift, Google API, MySQL, X (formerly Twitter) API, Facebook API, UIKit, App Store, REST

iOS Engineer

2016 - 2017

Johnson & Johnson

Worked on an iOS app with a team of six engineers.
Created tests to ensure quality and make sure the codebase is scalable in the future.
Operated within Scrum methodology with regular meetings like daily standups, sprint planning, and grooming.
Communicated with multiple departments to deliver new features quickly.
Testimonial: "It has been my pleasure to work with Patrik for the past few months. He is a high-performing team member that never disappoints. He is always eager to go above and beyond requirements to create a better user experience." – Diego Urquiza, via LinkedIn.

Technologies: CocoaPods, Alamofire, SonarQube, Core Data, Swift, Agile Software Development, Scrum, Cocoa Touch, TestFlight, UIKit, REST

iOS Engineer

2015 - 2016

STRV

Developed the full project in Swift.
Oversaw the whole app development cycle, including maintenance, bug fixing, and performance testing.
Collaborated with other departments to define and create specifications.
Led the development using Scrum methodology.

Technologies: AFNetworking, REST APIs, Core Data, Swift, JavaScript, BrainTree, TestFlight, UIKit, App Store, REST

iOS Engineer

2013 - 2014

Ideas2Markets

Developed the full project in Objective-C.
Implemented a fully functional iOS app from top to bottom, meeting the client's requirements.
Successfully released the final version to the App Store.

Technologies: Google Maps, AFNetworking, REST APIs, Core Data, Objective-C, MySQL, Stripe, UIKit, App Store, REST

Experience

Telepass

https://apps.apple.com/app/apple-store/id454224356

Velys

Grideo

https://apps.apple.com/us/app/grideo-social-media-post-maker/id1500554567

BabyCenter

https://apps.apple.com/app/apple-store/id386022579

Care4Today

Care4Today Connect is a medication management app with patients' and healthcare professionals' (HCPs) input to give you comprehensive health and wellness information beyond medication reminders.