Summary
Overview
Work History
Education
Skills
Interests
Work Availability
Work Preference
Languages
Timeline
Hi, I’m

Dmytro Kolesnyk

Senior/Lead IOS Engineer
Krakow
Dmytro Kolesnyk

Summary

I’ve been coding iOS for 7 years now and have worked on all stages of software development. I’m a quick learner and can pick up new techs in no time. I’m great at working with teams, but I can also work alone if I need to.

Over the past years, I’ve taken on customer-facing and technical leadership roles. I’m like the bridge between the backend and mobile teams. I’ve also mentored junior developers and helped them become experts.

I believe that a great team and communication is the key to building strong business relationships. I’m always looking for ways to improve software development processes, make developers’ lives easier, and boost teamwork.

Overview

8
years of professional experience
5
years of post-secondary education
4
Languages

Work History

Welltech
Kraków, Poland

Senior iOS Engineer
01.2024 - Current

Job overview

  • Built a design system to ensure consistency and speed up development.
  • Developed the OMO app with user-friendly features and smooth performance.
  • Improved app performance and stability through optimized code.
  • Collaborated closely with designers, product managers, and QA teams.
  • Added new features based on user feedback and market needs.
  • Ensured app reliability using automated tests and thorough debugging.
  • Tech Stack: Swift, SwiftUI, Combine, Clean Architecture, Firebase A/B Testing, Fastlane, Bitrise

Brainly
Kraków

Senior IOS Engineer
04.2023 - 01.2024

Job overview

  • Developed an educational app helping students with homework and learning.
  • Improved the Agile development process, enhancing team productivity.
  • Converted initial designs into complete app features.
  • Transitioned app from UIKit to SwiftUI, improving usability.
  • Conducted code reviews ensuring high quality.
  • Created engaging custom animations.
  • Tech Stack: Swift, UIKit, SwiftUI, Firebase A/B Testing, Clean/Viper, Combine

GlobalLogic
Kraków, Poland

Lead IOS Engineer
02.2022 - 04.2023

Job overview

  • Developed an app for corporate vulnerability detection and management.
  • Translated customer requirements into robust software solutions.
  • Mentored team members through technical challenges.
  • Collaborated on efficient database design and analytics.
  • Kept stakeholders updated with project progress.
  • Designed solutions that exceeded performance benchmarks.
  • Ensured smooth collaboration between developers and testers.
  • Tech Stack: SwiftUI, Swift, FastLane, CoreData, MVVM+C, Combine, Firebase, TestFlight, AppStoreConnect

Dolby Laboratories
Kharkiv

Senior IOS Engineer
06.2021 - 02.2022

Job overview

  • Developed an app providing customized 3D ear modeling for better audio experiences.
  • Worked closely with project teams and clients to resolve challenges.
  • Modernized existing codebase, improving app efficiency.
  • Regularly communicated with clients to meet their expectations.
  • Tech Stack: Swift, SwiftUI, ARKit, MVVM+C, Combine, XCode, SwiftLint, TestFlight

EPAM Systems
Kharkiv, Ukraine

Senior IOS Engineer
03.2021 - 06.2021

Job overview

  • Developed MVP app for a major UK bank.
  • Mentored junior developers, improving team skills.
  • Collaborated with project teams to solve development challenges.
  • Delivered high-quality solutions meeting client requirements.
  • Led feature planning and development discussions.
  • Enhanced user experience through close design collaboration.
  • Tech Stack: Swift, SwiftUI, MVVM+C, Combine, XCode, CocoaPods, GitLab, AppCenter, Figma

EPAM Systems
Kharkiv

Senior IOS Engineer
10.2020 - 03.2021

Job overview

  • Developed and maintained an app for a leading cryptocurrency provider.
  • Adapted Android designs to iOS, creating clear and intuitive layouts.
  • Resolved technical issues to significantly improve client satisfaction.
  • Tech Stack: Swift, CleanRedux, RxSwift, SnapKit, Swinject, XCode, CocoaPods, GitHub, TestFlight

EPAM Systems
Kharkiv

IOS Engineer
01.2019 - 03.2021

Job overview

  • Developed an app for a leading European supermarket chain.
  • Collaborated on development stages, including planning, coding, and testing.
  • Led a project subgroup, ensuring goal achievement.
  • Mentored new team members, improving onboarding processes.
  • Tech Stack: Swift, MVVM+C, ReactiveSwift, XCode, CocoaPods, Jenkins, Bitrise, Zeplin, Figma

EPAM Systems
Kharkiv

Junior IOS Engineer
01.2018 - 12.2018

Job overview

  • Developed a Planning Poker app for software estimation.
  • Integrated real-time features using Firebase for seamless team collaboration.
  • Improved estimation transparency during team meetings.
  • Tech Stack: Swift, UIKit, MVP, XCode, CocoaPods, Firebase, Git, Jira, Zeplin

-
Kharkiv

Junior Java Engineer
09.2017 - 11.2017

Job overview

  • Developed backend features for an e-commerce platform using Hybris.
  • Worked closely within a small development team.
  • Delivered clean and maintainable Java code.
  • Coordinated tasks and supervised project progress.
  • Tech Stack: Java, Hybris

Education

Kharkiv National University N.a. V.N. Karazin
Kharkiv, Ukraine

Master of Science from Cybersecurity
09.2019 - 12.2020

University Overview

Kharkiv National University N.a. V.N. Karazin
Kharkiv, Ukraine

Bachelor of Science from Cybersecurity
09.2015 - 06.2019

University Overview

Skills

    Swift

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Interests

Snowboarding/Surfing/Scateboarding

MTB cycling

Volleyball

Drums

Availability
See my work availability
Not Available
Available
monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Work Preference

Work Type

Full TimePart TimeContract Work

Work Location

Remote

Important To Me

Work-life balanceWork from home option

Languages

English
Upper intermediate (B2)
Polish
Upper intermediate (B2)
Ukrainian
Bilingual or Proficient (C2)
Spanish
Elementary (A2)

Timeline

Senior iOS Engineer
Welltech
01.2024 - Current
Senior IOS Engineer
Brainly
04.2023 - 01.2024
Lead IOS Engineer
GlobalLogic
02.2022 - 04.2023
Senior IOS Engineer
Dolby Laboratories
06.2021 - 02.2022
Senior IOS Engineer
EPAM Systems
03.2021 - 06.2021
Senior IOS Engineer
EPAM Systems
10.2020 - 03.2021
Kharkiv National University N.a. V.N. Karazin
Master of Science from Cybersecurity
09.2019 - 12.2020
IOS Engineer
EPAM Systems
01.2019 - 03.2021
Junior IOS Engineer
EPAM Systems
01.2018 - 12.2018
Junior Java Engineer
-
09.2017 - 11.2017
Kharkiv National University N.a. V.N. Karazin
Bachelor of Science from Cybersecurity
09.2015 - 06.2019
Dmytro KolesnykSenior/Lead IOS Engineer