AS.Artsiom Sazonau

Senior iOS Engineer

Thoughtful engineering.
Better mobile experiences.

I’m Artsiom, an iOS engineer based in Kraków. For 9+ years, I’ve built secure, high-performance apps across enterprise, SaaS, and consumer products — bringing care to the architecture, the details, and the people building them.

Explore my projects

THE THINGS I’VE WORKED ON

Selected projects.

The work, the challenges,
and where I made a difference.

3 projects

01 / Enterprise2021 — 2026

Enterprise apps at Kaseya

Making everyday workflows smoother through ticket-management features, stronger app performance, and faster delivery.

  • iOS
  • Swift Package Manager
  • GitLab CI/CD
My contribution

Senior iOS Engineer · Oct 2021 – Aug 2026

  • Built ticket-management features that reduced related customer-support requests by 25%.
  • Introduced Swift Package Manager, improving dependency management and reducing cold build time by 25%.
  • Reduced memory usage by 30% and contributed to a 99.9% crash-free rate.
  • Improved GitLab CI/CD pipelines, shortening delivery cycles by 50%.
  • Used Cursor, GitHub Copilot, and Claude Code to support implementation and code reviews.
02 / Consumer2020 — 2021

Food & drink app at EPAM

Customer-facing features for a top-15 US Food & Drink app, on a platform handling over 100,000 daily orders.

  • Swift
  • UIKit
  • Core Data
  • Fastlane
My contribution

Senior iOS Developer · Aug 2020 – Sep 2021

  • Developed features in Swift, Objective-C, UIKit, and Core Data for an app supporting 200,000 downloads per month.
  • Implemented Fastlane and GoCD pipelines, accelerating delivery by 30–50%.
  • Integrated analytics and crash-reporting SDKs, improving user-behavior tracking by 35%.
  • Reduced app launch time by 15% by refining background processes and initialization.
03 / Audio2017 — 2020

Audio streaming at Moodby

Two audio-streaming apps built from the ground up, bringing secure playback, offline listening, and music discovery to 10,000+ active users.

  • iOS
  • Audio streaming
  • Adyen
  • CommonCrypto
My contribution

iOS Developer · Jun 2017 – Aug 2020

  • Built two audio-streaming apps from scratch.
  • Integrated Adyen payments, helping increase subscription-based revenue by 20%.
  • Migrated encryption to CommonCrypto, accelerating end-to-end encryption by 70%.
  • Shipped offline mode, playlist and DJ search, and secure audio playback.

HOW I WORK

Care in every layer.

From the first architectural decision
to the final release.

01

Native at heart

Swift, SwiftUI, UIKit, Objective-C, Combine, Core Data, and AVFoundation.

02

Built to evolve

MVVM-C, TCA, VIPER, Clean Architecture, and SOLID — with code reviews and mentoring built into the process.

03

Beyond one platform

Cross-platform experience with Flutter, Dart, and Kotlin Multiplatform Mobile. Delivery with Fastlane and GitLab CI/CD.

KEEP IN TOUCH

Good things start
with a conversation.

Have a project in mind, or just want to connect?

Say hello