Andrii is available for hire
Hire AndriiAndrii Selivanov
Verified Expert in Engineering
iOS Developer
Dnipro, Dnipropetrovsk Oblast, Ukraine
Toptal member since July 12, 2022
Bio
Andrii is an iOS developer who has been creating mobile applications for seven years. He has vast experience solving algorithmic challenges, developing multiple iOS applications, and working within small-to-medium size teams. He values communication and collaboration as a way to stay on the same page and work efficiently as a team member. Andrii looks for opportunities to work with product companies to turn their ideas into the best quality product.
Portfolio
Pelmorex Weather Networks Inc
Swift, VIPER Architecture, UIKit, Test-driven Development (TDD), Unit Testing...
Excipient Inc.
Swift, UIKit, iOS, Figma, GitHub, Xcode, Widgets, Apple HealthKit, Firebase...
Numbrs
Swift, Objective-C, UIKit, Xcode, Slack, Software Development, SourceTree...
Experience
- ACM Problem Solving - 7 years
- Software Development - 7 years
- UIKit - 7 years
- iOS - 7 years
- Xcode - 7 years
- Swift - 5 years
- Objective-C - 3 years
- React Native - 2 years
Availability
Part-time
Preferred Environment
MacOS, Slack, Xcode, SourceTree
The most amazing...
...thing I've built is a software development company as a co-founder
Work Experience
iOS Software Developer
2023 - 2023
Pelmorex Weather Networks Inc
- Developed weather forecast features for The Weather Network iOS app, the number one iOS weather app in Canada with millions of active users.
- Collaborated on improving CI stability and performance, resulting in almost zero flakiness and around 1.5x faster build time.
- Covered all created features, including edge cases with tests by 100%.
Technologies: Swift, VIPER Architecture, UIKit, Test-driven Development (TDD), Unit Testing, UI Testing, Agile Practices, Objective-C, Scrum, Pair Programming, Jenkins, SonarQube, Firebase, iOS Video, Networks
iOS Developer
2022 - 2023
Excipient Inc.
- Implemented custom diet programs, a major update Apple featured in January 2023.
- Designed and implemented framework for paywall, sale, and offer tests, resulting in +25% free-to-paid conversion to date.
- Built lock screen widgets that Apple featured on iOS 16 launch day in September 2022.
- Created fluid, interactive controls to help users edit and manage their meal plans, such as a custom dial for specifying an eating window.
- Integrated the app with Apple Health for bidirectional synchronization of weight, exercise, and nutrition data.
Technologies: Swift, UIKit, iOS, Figma, GitHub, Xcode, Widgets, Apple HealthKit, Firebase, iPad, Model View Controller (MVC), iOS SDK, Mobile Development, Agile Practices, Networks
Senior iOS Developer
2019 - 2022
Numbrs
- Developed a banking app to aggregate users' bank accounts in one place.
- Created an app to securely store and operate with Bitcoin.
- Modernized more than 90% of legacy Objective-C code into Swift.
Technologies: Swift, Objective-C, UIKit, Xcode, Slack, Software Development, SourceTree, Cryptocurrency, Agile, Analytical Thinking, Refactoring, Swift 5, Teamwork, UI Animation, Unit Testing, UI Testing, CI/CD Pipelines, Model View ViewModel (MVVM), Model View Presenter (MVP), SwiftUI, iOS SDK, Mobile Development, Agile Practices, Networks
React Native Developer
2017 - 2018
Bitnation
- Built an app for communities to create a decentralized government with a crypto economy.
- Developed a concept of a framework for building decentralized applications based on blockchain.
- Created Swift library for communication between React Native front end and peer-to-peer client-side Go back end.
Technologies: React Native, iOS, Cryptocurrency, Software Development, Swift, Slack, Analytical Thinking, Teamwork, Unit Testing, Test-driven Development (TDD), Mobile Development, Agile Practices, Networks, JavaScript
Lead iOS Developer and Co-founder
2016 - 2017
Stormotion
- Developed several startup projects from the planning to maintaining phase and led a small team of iOS developers.
- Contributed to building a company culture of pixel-perfect design and attention to detail.
- Mentored and taught several junior iOS developers.
- Managed and tracked project progress using Redmine.
Technologies: iOS, Objective-C, Swift, Agile, Software Development, Xcode, Slack, UIKit, SourceTree, Analytical Thinking, Firebase, Google Maps, Mentorship, Refactoring, Teamwork, Model View Controller (MVC), iOS SDK, Mobile Development, VIPER Architecture, Agile Practices, iOS Video, Networks, Stripe
iOS Developer
2015 - 2016
LunApps
- Developed several applications for outsourcing projects within a small team.
- Used Agile-like development process and participated in planning and estimating features.
- Created the open-source UI components with a custom design.
- Wrote technical articles and case studies for the company blog.
Technologies: iOS, Objective-C, Swift, Agile, Analytical Thinking, Bluetooth, Xcode, SourceTree, Google Maps, UIKit, Slack, Firebase, UI Animation, Teamwork, iOS SDK, Mobile Development, VIPER Architecture, Agile Practices, Networks, Stripe
Experience
The Weather Network App
https://www.theweathernetwork.comThe Weather Network is Canada's number one iOS weather app, with millions of active users. It provides the most accurate weather forecast available in Canada. I was working on implementing multiple features, including an advanced insect activity report, AI weather assistant integration, UI redesign, and others.
Intent Meal Planning App
https://www.intentapp.comIntent is the largest meal planning app in the US, ranked within the top 50 health and fitness apps, and featured as App of the Day by Apple. It's written in Swift, taking the best of UIKit to provide an elegant user experience.
I was the iOS developer designing and building multiple features, including Apple Health Kit integration, implementation of lock screen widgets, custom interactive controls development, etc.
I was the iOS developer designing and building multiple features, including Apple Health Kit integration, implementation of lock screen widgets, custom interactive controls development, etc.
Personal Banking Solution
An application for managing bank accounts from different financial institutions.
I was an iOS developer collaborating with product and UI/UX teams and back-end and front-end engineers to implement core banking functionalities, aggregating bank accounts, fetching transactions, and transferring funds.
I was an iOS developer collaborating with product and UI/UX teams and back-end and front-end engineers to implement core banking functionalities, aggregating bank accounts, fetching transactions, and transferring funds.
Travelling Planer
An application to communicate with friends, plan a trip, share photo memories, save tickets for events to visit, and more.
I worked on this project as a solo iOS developer, creating the app from scratch to the final release. The UI part included pixel-perfect design and fancy animations. Together with BE team, we built a live updates system so that every change was instantly communicated to all related users.
I worked on this project as a solo iOS developer, creating the app from scratch to the final release. The UI part included pixel-perfect design and fancy animations. Together with BE team, we built a live updates system so that every change was instantly communicated to all related users.
Crypto Economy Application
An application developed with React Native aimed to help small communities create their economy and government using cryptocurrency and blockchain.
As a React Native developer working on the front end, I also participated in building blockchain-based document storage, allowing users to create custom ERC-20 tokens to operate with and interact with the blockchain.
As a React Native developer working on the front end, I also participated in building blockchain-based document storage, allowing users to create custom ERC-20 tokens to operate with and interact with the blockchain.
Custom Control with Liquid Animation
https://github.com/Stormotion-Mobile/LUNSegmentedControlThe custom open-source implementation of native UISegmentedControl that provides an attractive liquid animation for switching between segments.
I created it as a solo iOS developer using Objective-C.
I created it as a solo iOS developer using Objective-C.
Education
2018 - 2020
Master's Degree in Software Engineering
Dnipropetrovs'kij Nacional'nij Universitet - Dnipro, Ukraine
2014 - 2018
Bachelor's Degree in Software Engineering
Dnipropetrovs'kij Nacional'nij Universitet - Dnipro, Ukraine
Skills
Libraries/APIs
Google Maps, Stripe
Tools
Xcode, Slack, SourceTree, GitHub, Figma, Apple HealthKit, Jenkins, SonarQube
Languages
Swift, Swift 5, Objective-C, JavaScript
Frameworks
UIKit, iOS SDK, SwiftUI, React Native, Core Bluetooth, Core Location
Paradigms
Mobile Development, Agile, Refactoring, Unit Testing, Test-driven Development (TDD), Model View Controller (MVC), Model View ViewModel (MVVM), Model View Presenter (MVP), VIPER Architecture, Scrum, Pair Programming
Platforms
iOS, Firebase, MacOS, Apple TV
Other
Software Development, ACM Problem Solving, Algorithms, Data Structures, Mathematics, Agile Practices, Computer Science, Cryptocurrency, Analytical Thinking, Mentorship, UI Animation, Teamwork, Physics, UI Testing, Bluetooth, Widgets, CI/CD Pipelines, iPad, iOS Video, Networks
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