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Kostiantyn Kosolov

@kostiantynkosolov

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Experienced iOS Developer with a focus on maintainable architecture.

Lithuania

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What I'm looking for

I am looking for long-term remote roles that value innovation and collaboration.

As a Senior iOS Developer with over 6 years of experience, I have a proven track record of delivering high-quality applications that prioritize maintainability and user experience. My expertise lies in Swift, SwiftUI, and Clean Architecture, which I have applied in various projects, including the development of the TMArchitecture modular architecture concept for iOS apps. I am passionate about creating seamless integrations within the Apple ecosystem, as demonstrated in my personal project, VirtusFit, which bridges daily workout planning with technology.

Throughout my career, I have been committed to long-term quality and effective remote collaboration. I have successfully led projects like the iOS version of Kahunas, where I rewrote the Workout Log module to enhance user experience and scalability. My approach combines technical pragmatism with a willingness to innovate, ensuring that I deliver solutions that bring real value to users. I thrive in Agile environments and enjoy collaborating with cross-functional teams to achieve project goals.

Experience

Work history, roles, and key accomplishments

Current

iOS Developer

Current

Bee Techy

Jan 2025 - Present (7 months)

As the sole iOS developer, I was responsible for building the Hey Caddie app from scratch, applying Clean Architecture and MVVM principles to ensure long-term maintainability. This project marked the first production use of my own architectural approach, focused on clarity and modularity.

Swift Combine MVVM SwiftUI UIKit Core Data FileManager CloudKit GRDB REST APIs JSON Alamofire Moya Firebase Fastlane XCTest Git Swift Package Manager Cocoapods Agile Scrum

Senior iOS Developer

Kahunas IO

Nov 2022 - Sep 2023 (10 months)

I rewrote the Workout Log module to improve UX, scalability, and maintainability, implementing advanced UI features and custom animations for smooth user interaction. I also acted as a feature lead, scoping tasks and coordinating with a second iOS developer.

Swift UIKit SwiftUI MVVM REST APIs JSON Alamofire Moya Firebase Git Swift Package Manager Cocoapods Agile Scrum

Middle iOS Developer

Fox Consulting FZ LLE

Sep 2020 - Oct 2022 (2 years 1 month)

I delivered features and supported multiple large-scale athlete-focused apps, including rewriting the Ganbaru Method app from scratch (excluding the Workout Log module). I collaborated with design and backend teams to align implementation with evolving product requirements.

Swift UIKit MVVM REST APIs JSON Alamofire Moya Firebase Git Swift Package Manager Cocoapods Agile Scrum

Junior iOS Developer

Pro Creations

Apr 2019 - Aug 2020 (1 year 4 months)

I independently developed and shipped multiple small-scale iOS apps using UIKit and AVFoundation. I also integrated external hardware via Bluetooth, including smart animal collars with live tracking.

Swift UIKit AVFoundation Bluetooth Core Data FileManager Git

Education

Degrees, certifications, and relevant coursework

Zaporizhzhia National Technical University (ZNTU)

Master’s Degree with Honors, Intelligent Technologies of Microsystem Radio-Electronic Equipment

2017 - 2019

Grade: Honors

Completed a Master's Degree with Honors in Technical Faculty, specializing in Intelligent Technologies of Microsystem Radio-Electronic Equipment. My diploma thesis focused on developing a mobile front-end for an environmental air-quality sensor network.

Tim Buchalka’s Learn Pro Programming Academ, Omni Academ

Certification, CI/CD for iOS Development, Agile Scrum Master

Completed the 'Master CI/CD for iOS Developers' course by Tim Buchalka’s Learn Pro Programming Academ. Also obtained the 'Complete Agile Scrum Master Certification Training' from Omni Academ.

Dr. Angela Yu, ITVDN with EPA, Dmitry Nesteruk

Bootcamp, iOS App Development, Swift, Design Patterns

Participated in 'iOS & Swift – The Complete iOS App Development Bootcamp' by Dr. Angela Yu. Also completed 'Swift Professional' with ITVDN and EPA, and 'Design Patterns in Swift' by Dmitry Nesteruk.