Ivan Zezyulya

iOS Developer

Omsk, Russia (UTC+6)

Links:

• E-mail: job@zoid.cc
• GitHub: https://github.com/ivanzoid
• StackOverflow: https://stackoverflow.com/story/ivan_zezyulya
• LinkedIn: https://www.linkedin.com/in/ivanzezyulya/
• Telegram: http://t.me/ivanzoid
• VK: https://vk.com/ivanzoid
• Blog: http://zoid.cc
• CV (this one): https://github.com/ivanzoid/cv or https://ivanzoid.github.io/cv/

About

12 years of software development (9 years in iOS).

I worked on numerous iOS projects, some successful (thousands and millions of users), some not so much.

• Love good architecture and clear naming of things
• I prefer to not create complexity when it's not needed (but do it when it is)
• Like new technologies but prefer to wait when they become stable
• Can propose new features/solutions for business, estimate and write docs for them, implement, test and deploy
• Could lead a small team of developers (gathering information, preparing tasks, code review)
• Love automation (could it be CI/CD, or local scripts or code generation) when it saves time/resources
• Have backend development experience (Go/Python/PHP), which helps me to understand overall product architecture and communicate with backend team

Tech Stack

• iOS:
  • Swift, Objective-C, MVVM
  • System frameworks: AVFoundation (video conversion/merging/cutting), AddressBook (contact list), AudioToolbox (low-level audio playback), AutoLayout, CFNetwork (low-level networking), CoreAnimation (/QuartzCore, advanced animations), CoreData, CoreGraphics (manual drawing), CoreLocation, CoreMotion (implementing AR before ARKit), CoreTelephony (determining cellular network type), EventKit (adding/reading events in calendar), Grand Central Dispatch, MapKit, Metal, Photos, Push Notifications, Security (interacting with Keychain), Social, SQLite, StoreKit (in-app purchases), UIKit, UIKit Dynamics, UserNotifications, WebKit, XCTest
  • Libs/frameworks: AWS SDK, Bugfender SDK, Firebase/Google Analytics, Google protobuf, Lottie, MagicalRecord, OpenAPI (Swagger), R.swift, Realm, RxSwift/RxCocoa, Quick/Nimble, Sentry API, SnapKit, SoundCloud API, SwiftLint, TestFlight, Youtube API
  • CI: Circle CI
  • Automation: CocoaPods, fastlane
• Backend: Golang, General Linux/Unix command-line experience, Some Amazon AWS products (S3, EC2, DynamoDB, Redshift), PostgreSQL, MySQL, Python, PHP, bash, httpie, curl
• Frontend: JavaScript, CSS/HTML5, Django, jQuery
• DevOps: Ansible, Ubuntu Servier, Docker, rsync, scp, Let's Encrypt, nginx, MySQL, Postfix (+SPF/DKIM/DMARC)
• C++: C++11, STL, Qt, wxWidgets
• Python: Python3, TCP sockets, Django

Employment history

Education

Work examples (apps)

• Veriflix

  

  A set of apps for news companies in Belgium and France.
  https://apps.apple.com/us/app/si-video/id1483933497
  https://apps.apple.com/us/app/lv-video/id1523811860
  ... plus 7 more

  My role:

  • Main app developer

  Achievements:

  • Propose, document, estimate, implement and deploy new advanced video recording pipeline, which contains reording/deleting/cutting/adding text/merging of recorded videos
  • Implemented a logging system (which was totally missed before) which sends logs to cloud service, this allows us to troubleshoot bugs even in production
  • Propose & implement a camera UI (and logics) which copies interface of standard iOS camera app (0.5x/1x/2x buttons and so on)
  • Fully automate build process using fastlane. Given the number of apps (18) this was a huge time-saver
  • Integrate R.swift (and use it for localization, images, and files) which reduces chances of runtime errors
  • Fully migrate to Swift from Objective-C
  • Migrate SDK to XCFramework, automate binary builds, create CocoaPods distribution
  • Rework SDK documentation, move it from raw HTML to MarkDown + automated HTML generation

  Stack:

  • UIKit, Custom networking, MVVM, CocoaPods.

• Vampr

  

  Social network for musicians. In Best of 2017 app list by Apple.
  3.5M+ connections as of Nov 2018.
  https://vampr.me
  https://apps.apple.com/app/vampr/id1069819177

  Responsibilites:

  • App architecture from ground up.
  • Developed most app parts.
  • Code review
  • Continuous Integration

  Stack: UIKit, UIKit Dynamics, MVC.

• The Sun Dream Team FC

  

  Fantasy football app for English Premier League.
  500K users/month after launch.
  https://www.dreamteamfc.com/c/
  https://apps.apple.com/gb/app/dream-team-fantasy-football/id337710261

  Responsibilities:

  • UI, Business logic and networking code
  • Implemented player field screen in 3D using UIKit.

  Stack: UIKit, VIPER, CoreData.

• iHerb

  

  Mobile app for iHerb online store.
  Participated in base stage of app development.
  https://apps.apple.com/app/iherb/id636609212

  Responsibilities:

  • Base architecture
  • Home screen UI
  • Networking code.

  Stack: UIKit, AFNetworking.

• Interactive Display

  iPad demo stand application for some retail networks in US.
  Responsibilities:

  • Implementing new features
  • Unit tests.

  Stack: Swift, MVVM, Storyboards, iPad, Realm, GCD/NSOperationQueue, RxSwift.

• Mokka

  

  Finance service client.
  https://apps.apple.com/app/id1499342014

  Responsibilities:

  • Implementing new features
  • Code review
  • Unit tests

  Stack: Swift, MVVM, SnapKit, Repositories, Alamofire

• Fernwood Fitness

  App for Australia’s largest female fitness network, Fernwood Fitness.
  https://www.fernwoodfitness.com.au
  https://apps.apple.com/au/app/fernwood/id1433822715

  Responsibilities:

  • UI
  • Business logic
  • Networking code
  • Unit tests
  • CI

  Stack: UIKit, VPIER, OpenApi 3.0 (Swagger).

• Fisho

  

  Social network for fishers in Australia.
  https://www.fishoapp.com.au

  Responsibilities:

  • UI
  • Business logic
  • Networking code
  • Unit tests

  Stack: UIKit, CorePlot, VIPER, OpenApi 2.0 (Swagger)

• Momatu

  App for organizing memories.
  https://apps.apple.com/us/app/momatu/id1313564080

  Responsibilities: UI, Business logic and networking code.

  Stack: UIKit, UIKit Dynamics.

• StartFX

  

  Trading terminal app.
  https://apps.apple.com/us/app/startfx/id684181266

  Responsibilities:

  • developing all networking code
  • business logics for operations with deals (open/close/change)
  • part of UI.

  Stack:

  • TCP sockets
  • UIKit
  • OpenGL (with custom shaders for graphs)
  • CoreData
  • GCD.

• Nissan NI-PiK

  Application with cars' Gallery, Technical characteristics, List of colors, Compare to competitors, Register Client and other features for Nissan.
  https://vimeo.com/43107303

  Responsibilities: adding features to application, fixing bugs

  Stack: UIKit, SOAP, JSON

• OwlCity Galaxy

  OwlCity Galaxy is feature-rich promo application for UK band “Owl City”.
  It included: 3D Galaxy View, Comment system, Embedded music player, Lyrics & images for songs, OwlCity Calendar, Videos, List of your friends, Customize your planet, Integrated fan store.
  https://www.facebook.com/owlcity/posts/new-version-of-the-owl-city-galaxy-iphone-app-available-now-install-the-latest-u/203513706370561/

  Responsibilities:

  • Main developer

  Stack:

  • SIO2 (3D Engine for iPhone/Android)
  • XMPPFramework (XMPP/Jabber library for iOS)
  • Urban Airship (Push notifications)
  • ASIHttpRequest (networking)
  • Twitter API
  • Facebook SDK
  • Google Calendar API
  • Youtube API
  • Airbrake (error reporting)
  • SudzC (SOAP service wrappers generator)

• Apartment search applications

  

  Series of applications (20+ apps) for real estate agencies in UK.
  https://apps.apple.com/us/app/henry-adams/id377862665

  Responsibilities: fixing bugs, improving application, adding features, implementing new applications for other agencies.

  Stack: UIKit, CoreLocation, XML, MapKit.

  List of clients/applications developed:

  • Aspire
  • Bective Leslie March
  • BELVOIR!
  • Beresfords Estate Agents
  • Chase Buchanan
  • Colin Bibra
  • Gascoigne Halman
  • Henry Adams
  • Icon Residential
  • Lex Allan Estate Agents
  • Life Residential
  • Living Residential Estate
  • Manning Stainton
  • Michael Graham
  • Morgan Randall
  • Move Revolution
  • Oliver's Town
  • Parklane Properties
  • The Property Lounge
  • Walkers Estate Agents
  • Waterfords
  • Winchester Lettings

• Backend server for HAPOC game

  HAPOC is online multiplayer casual game for guessing words by first letters.
  https://apps.apple.com/us/app/hapoc-human-animal-plant-object/id497325725?mt=8

  Responsibilities: develop from scratch server for iOS game Hapoc

  Stack: Python 2.6, TCP sockets, Linux

• Custody Connection

  Custody Connection is an easily viewable calendar, where parents can sync with each other to create, manage, trade days and view their custody schedule in one central location, anytime, anywhere they go with their iPhone, iTouch or iPad.
  https://apps.apple.com/us/app/custody-connection/id472605882

  Responsibilities: fixing bugs, adding new features

  Stack: iOS: UIKit, CoreData, Calendar API; Server-side: C#, MS SQL Server

• Hansel and Gretel

  Interactive book.
  https://apps.apple.com/us/app/hansel-gretel-childrens-interactive/id396998808

  Responsibilities: main developer
  Stack: UIKit

• Apartment Rentals

  Find apartments, codos and houses for rent with the ApartmentRentals.com mobile app. Search for properties nearby, filter by price, bathrooms and bedrooms. See pictures and floor plans, and contact listings by phone or by submitting a form from within the app.
  https://apps.apple.com/us/app/apartment-rentals/id588135302

  Responsibilities: Implement most of the application
  Stack: UIKit, WebKit, CoreLocation