Рома

ROMAN BIHUN
Senior iOS Software Engineer
✉ [open contact info](look above in the "contact info" section)

[open contact info](look above in the "contact info" section)

📍 Kharkiv, Ukraine

PROFESSIONAL SUMMARY:
Highly accomplished Senior iOS Software Engineer with over 13 years of progressive
experience in software development, including 8+ dedicated years specializing in iOS and Swift.
Proven expertise in designing, developing, and deploying robust, scalable, and user-centric mobile
applications across diverse domains such as Social Networks, Health, Entertainment, Secure Video/
Chat, Casino Games, Fitness, Loyalty Programs and Utilities.
Adept at leading full development lifecycles, conducting thorough code reviews, and
providing mentorship to junior engineers. Pro cient in implementing advanced architectural
patterns (MVVM, VIP, MVP, Redux-Like) and clean code principles. Experienced with modern
Swift/SwiftUI, asynchronous programming (Async/Await, GCD, Operations), RESTful/GraphQL
APIs, and various data persistence solutions (Core Data, Realm, SwiftData). Committed to
delivering high-quality solutions that align with iOS Human Interface Guidelines and drive
signi cant business value.

CORE SKILLS

◦ Languages & Frameworks: Swift (UIKit/SwiftUI), Objective-C, C++, Core Data, Realm,
SwiftData, StoreKit
◦ Architecture & Design: MVVM, VIP, MVP, Redux-Like/TCA, SOLID, OOP, POP
◦ Concurrency: Async/Await, Grand Central Dispatch (GCD), Operations
◦ Networking: RESTful APIs, GraphQL
◦ Version Control: Git, Git Flow
◦ Dependency Management: Swift Package Manager (SPM), CocoaPods
◦ Testing: Unit Testing, UI Testing, TDD
◦ Tools: Xcode, Jira, Con uence, Fastlane…

WORK HISTORY

Freelance iOS Developer (Upwork)

Senior iOS Engineer | Jan 2023 – Present

▪ Contributed to the design and implementation of application infrastructure, optimizing
performance and scalability.
▪ Spearheaded development of new applications from scratch, leveraging modern Swift/
SwiftUI practices. Built 15+ iOS apps from scratch, including:
fi
fl
fi
 ◦ Utility apps: Productivity tools, le managers, and system optimizers.
◦ Casual games: Puzzle and arcade-style games with SpriteKit.
◦ Entertainment apps: Streaming clients and social features.
• Delivered 100% on-time projects with 5-star Upwork ratings.
• Architected scalable solutions for startups and enterprises.

Euvic ( euvic.pl ) (April 2021 – Jan 2023)
Title: iOS Software Engineer
◦ Diagnosed and swiftly resolved complex technical issues, enhancing application stability
and user satisfaction.
▪ Contributed to feature development, consistently meeting performance goals and project
deadlines.
▪ Collaborated effectively with cross-functional teams to design and implement innovative
solutions.
▪ Analyzed project data to identify and execute opportunities for operational improvements.

Fitplan, Inc ( http://www. tplanapp.com ) (June 2017 – August 2020)

Title: iOS Developer
▪ Led the re-architecture and rewrite of the application's core codebase, signi cantly
improving performance and maintainability.
▪ Optimized the networking layer, reducing API call latency and improving data
synchronization.
▪ Designed and implemented numerous new features, directly enhancing user engagement and
retention.
▪ Ensured application compatibility and performance by proactively adopting codebase to new
iOS and Swift versions.
▪ Consistently delivered projects on time and within budget, meeting all technical
speci cations.

Satismeter ( www.satismeter.com ) (February 2016 – December 2016)
Title: iOS Developer
▪ Developed and delivered fully functional mobile applications, ensuring clean, organized,
and maintainable codebases.
▪ Implemented comprehensive unit tests to ensure software quality and reliability.

Aimprosoft ( www.aimprosoft.com ) (February 2010 – December 2015)
Title: C/C++/VC Developer / Project Manager / Team Lead | Current:
▪ Managed full project development lifecycle from initiation to deployment, ensuring
successful delivery of C/C++/VC applications.
▪ De ned and managed project scope, goals, and deliverables in close collaboration with
senior management and stakeholders.
▪ Developed and implemented best practices and tools for project execution, improving team
ef ciency and project outcomes.
fi
fi
fi
fi
fi
fi
EDUCATION: bachelor's Degree in Applied Mathematics | Dnipro National University, Dnipro

LANGUAGES

◦ Ukrainian: Native
◦ English: Upper-Intermediate (B2)