Senior IOS Developer

Mychailo S

Information

Available hours \ week
<20 h/w
Seniority level
Senior
Years of experience
10 yrs.
Location
Ukraine
Timezone
(GMT+02:00) Kyiv

Languages

Ukrainian
Advanced (C1)
English
Pre-Intermediate (A2+)

About

Mychailo focuses on mobile app architecture in Swift, working as a Senior iOS Developer with about 10 years in commercial delivery across Ukraine-based and distributed teams. He builds and refactors feature-heavy apps, using Git workflows, SwiftUI for modern UI, and Apple Combine for reactive data flow. Typical work includes code reviews, debugging tricky defects, performance and scalability tuning, plus setting up CI/CD pipelines and release hygiene, sometimes under tight audit needs like KYC. He has delivered products for manufacturing operations, financial services, travel booking, geolocation/addressing, and scooter sharing, etc. Secondary experience includes MySQL, Objective-C, PostgreSQL, MongoDB, and Firebase integration for analytics and push. Master’s Degree, Computer Engineering, Cherkasy National University.

Main technologies

Additional skills

Experience

Confidential mobile application — NDA

Senior IOS Developer

About the Project

A commercial mobile application developed for an international client. Due to a non-disclosure agreement, detailed information about the product, client, business domain, and specific functionality cannot be disclosed. The project involves the development and continuous improvement of a production iOS application with a focus on scalability, maintainability, performance, and modern iOS development practices.

  • Healthcare

Responsibilities

- Design, develop, and maintain production-ready iOS application functionality; - Implement new features from technical requirements to production release; - Maintain and improve existing application modules, including legacy parts of the codebase; - Refactor and modernize existing functionality to improve maintainability, stability, and performance; - Develop reusable UI components and complex application flows; - Integrate the application with backend services and REST APIs; - Work with asynchronous operations, networking, state management, and application lifecycle; - Investigate and resolve production issues, crashes, performance bottlenecks, and edge cases; - Participate in architectural decisions and technical discussions; - Conduct code reviews and contribute to maintaining development standards and code quality; Collaborate with backend developers, QA engineers, designers, product managers, and other stakeholders;

Skills & technologies

Glasscubes

Senior IOS Developer

About the Project

Glasscubes is a cloud-based business collaboration platform that helps teams securely share and manage files, communicate, organize workspaces, and manage tasks and projects from a single application.

  • Project Management
  • Accounting
  • Productivity

Responsibilities

- Maintain and improve existing iOS application modules, including legacy parts of the codebase; - Design and implement new features from requirements to production release; - Refactor and modernize existing functionality to improve maintainability, stability, and code quality; - Develop and support user interfaces and business logic across different parts of the application; - Integrate the application with backend services and REST APIs; - Investigate and resolve production issues, bugs, crashes, and performance problems; - Ensure backward compatibility while introducing new functionality into the existing product; - Collaborate with backend developers, QA engineers, designers, and product stakeholders throughout the development lifecycle; - Participate in technical discussions, code reviews, and architectural improvements; - Support application releases and ongoing product development.

Skills & technologies

Automated workplace at a sewing factory app

Senior Mobile Developer

About the Project

An application for service to control high-margin handcrafted and people-dependent manufacturing enterprises.

Responsibilities

- Design and develop complex mobile applications using Swift programming language; - Collaborate with cross-functional teams to define, design, and ship new features ; - Write clean, efficient, and well-documented code ; - Conduct code reviews and ensure adherence to coding standards ; - Identify and resolve performance and scalability issues Stay up-to-date with emerging trends and technologies in mobile development ; - Develop and maintain continuous integration and delivery pipelines.

Skills & technologies

The under NDA banking app

Senior IOS Developer

About the Project

An application for banks' business customers. My job at this project was to finish the existing application, refactor the code, fix broken and implement new features for KYC.

Responsibilities

- Design and develop complex mobile applications using Swift programming language ; - Collaborate with cross-functional teams to define, design, and ship new features ; - Write clean, efficient, and well-documented code ; - Conduct code reviews and ensure adherence to coding standards ; - Identify and resolve performance and scalability issues Stay up-to-date with emerging trends and technologies in mobile development ; - Develop and maintain continuous integration and delivery pipelines.

Skills & technologies

PlugPlug

Senior Mobile Developer

About the Project

PlugPlug is an online vacation booking platform that's utilizing several booking APIs, provides rewards for users that booked a vacation via the platform and left a review. The platform has both web and mobile interfaces, the mobile version was built with Java Kotlin for Android and IOS Swift. Web was built with Vue.JS and Laravel API.

Responsibilities

- Design and develop complex mobile applications using Swift programming language ; - Collaborate with cross-functional teams to define, design, and ship new features ; - Write clean, efficient, and well-documented code ; - Conduct code reviews and ensure adherence to coding standards ; - Identify and resolve performance and scalability issues Stay up-to-date with emerging trends and technologies in mobile development ; - Develop and maintain continuous integration and delivery pipelines .

Skills & technologies

Naviaddress

Mobile developer

About the Project

Global Digital Addressing System. With it, you can assign an address to even a centenary tree in a city square or explain how to get to the office by sending a link to the address.

Responsibilities

- Design and develop complex mobile applications using Swift programming language ; - Collaborate with cross-functional teams to define, design, and ship new features ; - Write clean, efficient, and well-documented code ; - Conduct code reviews and ensure adherence to coding standards ; - Identify and resolve performance and scalability issues Stay up-to-date with emerging trends and technologies in mobile development ; - Develop and maintain continuous integration and delivery pipelines .

Skills & technologies

  • Swift
  • CocoaPods
  • Git
  • Google APIs

Skooter-bike App

Mobile Developer

About the Project

The number 1 application in Cyprus, designed to share electric scooters. With a few simple steps, you can unlock and ride one of the electric scooters and save time from traveling to Cyprus or getting to your destination at rush hour.

Responsibilities

- Design and develop complex mobile applications using SWIFT programming language ; - Collaborate with cross-functional teams to define, design, and ship new features ; - Write clean, efficient, and well-documented code ; - Conduct code reviews and ensure adherence to coding standards ; - Identify and resolve performance and scalability issues Stay up-to-date with emerging trends and technologies in mobile development ; - Develop and maintain continuous integration and delivery pipelines .

Skills & technologies

Education

Cherkasy National University

2008 - 2013
Master’s Degree, Computer Engineering