Kyrylo – Objective C, Swift, Core Graphics

The project was an e-commerce solution for online/offline food delivery. For offline delivery, we had a cashier application and for online delivery, we had a consumer application.

• Added code generation for unit test mocks. Decreased the test writing time by 30%
• Covered a lot of code with unit tests that increased coverage up to 90%
• Added disk cache service to save a small amount of data simply without DB. Routine responsibilities:
• Code review
• Added new UI elements and UI improvements
• Added receipt creation and printing functionality for customers
• Added QR code generation and scanning functionality
• Added AB tests
• Added restoring functionality after PayPal is down

This is a messenger that uses end-to-end encryption for all messages.

• Refactored analytics framework and added saving functionality for failed analytics requests
• Created modules for different parts of the application
• Found and fixed bugs for not showing push notifications Routine tasks:
• Code review
• Was in charge of minor bugs fixing
• Refactored code for new architecture
• Was in charge of offline reactions
• Refactored screens
• Removed Web views from
• Refactored purchases
• Added promotion screens and triggers

This is an application for booking flights.

• Refactored 50% of the codebase, because the application before me was written as MVP and didn't have proper architecture
• Increased FPS of animations
• Refactored payment flow and thereby resolved a lot of bugs
• Added ticket filters
• Refactored payment flow
• Set up proper multithreading architecture

In this consulting company he was working on 2 projects. The first one is a food delivery product for Africa. The second one is AR educational product for Kids.

• Designed architecture for both applications
• Developed both products from scratch
• Created both products from scratch
• Integrated Rave payment into the food delivery application
• Integrated ARKit into the educational product for kids

This is a mac application for building Roadmaps.

• Designed and developed straightforward service for changing themes in runtime
• Found and fixed a critical bug in c++ library
• Enabled dark mode
• Added including document members feature
• Developed statistics screen

This is an e-commerce application for selling herbal supplements.

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• Added cache layer to application
• Rewrote application from Objective-C to Swift
• Improved non-crash users rate up to 100% by migrating to Swift
• Integrated PayPal
• Refactored payment flow
• Added async image downloading and caching
• Supported and bug fixes