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Olga Vorona
Verified Expert in Engineering
Software Developer
Chiang Mai, Thailand
Toptal member since August 25, 2022
Bio
Olga is a lead iOS developer with 10+ years building and scaling 20+ apps, including Meta Messenger and Ray‑Ban Meta, serving 1+ billion MAU. She prioritizes shipping quickly and accurately, exemplified by launching a comprehensive bank app within two months, meeting critical metrics and SLAs. Olga, an analytics-driven and hands-on leader, excels in Swift/Objective‑C, UIKit, AR/Bluetooth, and design systems, enhancing UX, reliability, and team efficiency.
Portfolio
ThoughtWorks
Swift 6, Kotlin, iOS
Swiftlane
CocoaPods, ARKit, Notion, iOS, Swift, Xcode, Bitrise, Core Bluetooth...
Sberbank
iOS, Xcode, CocoaPods, Jira, App Development, Mobile Apps, Mobile App UI...
Experience
- iOS - 10 years
- Git - 10 years
- Xcode - 10 years
- Swift - 7 years
- Objective-C - 5 years
- ARKit - 5 years
- Crashlytics - 5 years
- Fastlane - 4 years
Preferred Environment
Xcode, Swift, Objective-C
The most amazing...
...app I've created is a fully functional bank app I built in two months with the assistance of only one more iOS developer.
Work Experience
Lead Consultant
2022 - 2025
ThoughtWorks
- Led cross-functional collaboration on high-impact FAANG projects, including one of the biggest messengers.
- Delivered the latest version of the retail FAANG iOS app within four months, successfully meeting all target metrics.
- Contributed to the core design system team, consistently achieving all service-level agreements (SLAs).
Technologies: Swift 6, Kotlin, iOS
Senior iOS Developer
2021 - 2022
Swiftlane
- Completed the main screen and the pass creation redesign while improving the user experience and the time to reach the goal.
- Added a few integrations with external lock providers to make the distribution of our app easier.
- Set up continuous improvement with Bitrise and saved hours for team members.
Technologies: CocoaPods, ARKit, Notion, iOS, Swift, Xcode, Bitrise, Core Bluetooth, Core Location, JSON, REST APIs, Mobile Development, Mobile App Development, Native Mobile Apps, App Store, iOS SDK, iOS Native Libraries, Source Code Review, Code Review, Git, Task Analysis, Technical Hiring, Interviewing, SourceTree, GitHub, GitLab, Twilio, Architecture, Video Chat, SwiftUI
Senior iOS Developer
2020 - 2021
Sberbank
- Created a credit product for small business owners from scratch.
- Collaborated with the analytics and design team to create a great UX.
- Coached four junior developers and taught them essential tools and information needed for their jobs.
Technologies: iOS, Xcode, CocoaPods, Jira, App Development, Mobile Apps, Mobile App UI, Mobile Applications, App Store, Task Analysis, Git, Code Review, Source Code Review, Interviewing, SourceTree, Architecture, Team Leadership
iOS Team Lead
2017 - 2020
Freelance
- Created an innovative augmented reality experience with iBeacon technologies to navigate inside railway stations.
- Developed and launched a TikTok-like app in two months.
- Built and improved more than ten apps for different clients.
Technologies: Swift, Xcode, CocoaPods, iOS SDK, iOS Native Libraries, Mobile, Mobile Apps, Mobile UI, Native Mobile Apps, Mobile App Development, Mobile Development, App Store, Code Review, Source Code Review, Git, Task Analysis, Interviews, IT Project Management, Project Management
iOS Developer
2015 - 2017
Redmadrobot
- Developed a fully functional bank app from scratch in two months.
- Organized and participated in various knowledge-sharing activities with a design team.
- Redesigned the app for one of the biggest mobile network operators.
Technologies: Swift, iOS, Xcode, Google Analytics, Crashlytics, Fastlane, Jira, Core Location, Git, App Store, Code Review, Source Code Review, Interviewing, iOS SDK, iOS Native Libraries, Mobile, Mobile Apps, Mobile Applications, Mobile App Development, Swift 2, Swift 3
iOS Developer
2014 - 2015
EastBanc Technologies Russia
- Created a research app that applied to the oil industry and helped reduce the time of in-field checks.
- Developed a social network app for Leroy Merlin employees.
- Worked on the Washington Post app, assisting with its redesign.
Technologies: Swift, Xcode, App Store, iOS, App Development, Apps, Apple, CocoaPods, Source Code Review, SourceTree, GitHub, GitLab, Jenkins, Fastlane, Git, Native Mobile Apps, Mobile Apps, Mobile App Development
iOS Developer
2013 - 2014
Freelance
- Developed an app for a cinema chain from scratch, allowing clients to buy tickets from their iPhones.
- Created an app with 3D tours for users to be able to check out the interior of different venues.
- Built an app that saved a person's life by sending location to lifeguards.
Technologies: iOS, WebKit, UIKit, Mobile, Mobile UX
Junior iOS Developer
2012 - 2012
iBear LLC
- Worked on the most popular, at the time, personal finance product.
- Researched voice assistant functionality before Siri existed.
- Completed app development to the release mode, one of the existing but not published apps.
Technologies: iOS, CocoaPods, iOS Frameworks
Experience
Mobile Access App
https://www.swiftlane.com/mobile-access-control/Swiftlane’s modern face recognition and mobile access systems create a luxury experience for multifamily communities. The Swiftlane app can be used for opening doors with just a tap or walking up to a door, looking at the access point, and unlocking using just your face. User enrollment is quick and easy and can be completed in just 60 seconds.
Sber Bussiness
Sber is the biggest technology company in Russia, and Sber Bussiness is an app that provides a convenient way for business owners to access their bank services.
I was the leader of an iOS team consisting of four developers and a part of a larger product team of 16 people. More than 50 developers were working on the iOS app. We developed a successful credit feature from scratch, allowing small business owners to obtain credit directly on the app.
I was the leader of an iOS team consisting of four developers and a part of a larger product team of 16 people. More than 50 developers were working on the iOS app. We developed a successful credit feature from scratch, allowing small business owners to obtain credit directly on the app.
RapidAssist
RapidAssist is a Swift-based application that helps teams coordinate in an emergency.
I was the leader of a team of three developers who worked on and accomplished the app's redesign, adding a chat function and fixing stability issues.
I was the leader of a team of three developers who worked on and accomplished the app's redesign, adding a chat function and fixing stability issues.
Siren App
A dating app that I redesigned to incorporate a bright, modern look and feel. I fixed bugs and maintained stability, developed chat and user profile tags, and set up analytics to track the user experience within the app.
Russian Railways App
This Swift-based application helps passengers buy tickets and get information related to their travel.
I essentially worked on the railway ticketing service and focused on an iBeacon-based navigation system inside the railway station, an augmented reality quest, and the station information system.
I essentially worked on the railway ticketing service and focused on an iBeacon-based navigation system inside the railway station, an augmented reality quest, and the station information system.
Education
2009 - 2014
Master's Degree in Computer Science
Altai State Technical University - Barnaul, Russia
Skills
Libraries/APIs
CocoaPods, iOS Native Libraries, REST APIs
Tools
Xcode, Git, SourceTree, Figma, Crashlytics, Sentry, Jenkins, Jira, Notion, Fastlane, Google Analytics, GitHub, GitLab
Languages
Swift, Objective-C, Swift 2, Swift 3, Swift 6, Kotlin
Frameworks
iOS Frameworks, UIKit, iOS SDK, ARKit, Core Bluetooth, Core Location, SwiftUI
Paradigms
Mobile Development, App Development
Platforms
iOS, Mobile, Bitrise, Firebase, Apple, Twilio
Storage
JSON
Industry Expertise
Project Management
Other
Software Development, Mobile UX, Mobile App Development, App Store, Mobile Apps, Mobile App UI, Mobile Applications, Source Code Review, Code Review, Task Analysis, Algorithms, Data Structures, iBeacon, WebKit, Technical Hiring, Interviewing, Computer Graphics, Native Mobile Apps, Mobile UI, Interviews, Apps, IT Project Management, Architecture, Team Leadership, Video Chat
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