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Oleksandr – Android, Java, Kotlin, experts in Lemon.io

Oleksandr

From Ukraine (GMT+2)

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Mobile DeveloperSenior
Hire developer
9 years of commercial experience
Cybersecurity
Healthcare
IoT
Logistics
Transportation
Mobile apps
Platforms
Lemon.io stats
3
projects done
522
hours worked
Open
to new offers

Oleksandr – Android, Java, Kotlin

Oleksandr is an adaptable Android developer with a strong portfolio and over 7 years of commercial background mastering Kotlin. He has rich experience building app architecture, leading app development, and mentoring team members. He is particularly well-suited for Android and Kotlin Multiplatform projects.

Main technologies
Android
7 years
Java
7 years
Kotlin
7 years
Firebase
7 years
Additional skills
Retrofit
Coroutines
Realm
MVP
Koin
Dagger
BLE
Microsoft Azure
RxJava
JSON
OkHttp
Android Jetpack
WebRTC
Jetpack Compose
Unit testing
CI/CD
Stripe API
Rewards and achievements
Tech interviewer
Client's favourite
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Senior Android Developer
May 2023 - Ongoing1 year 1 month
Project Overview

End-to-end encrypted file manager.

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Responsibilities:
  • Was responsible for all business-related features, e.g. groups feature (share files within some specific group of users).
Project Tech stack:
Android
Clean Architecture
Data Security
Kotlin
Jetpack Compose
Android Jetpack
Koin
MVVM
CI
CD
GitLab
Android Software Engineer
Jan 2022 - Apr 20231 year 3 months
Project Overview

A national transportation company that connects passengers to affordable and convenient rides. You can request a ride in their app, and a driver from your community will arrive to give you a ride to your destination. Users of the app pay for their rides within the app using their smartphone.

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Responsibilities:

Oleksandr was a part of the Payments team comprising 3 Android developers.

  • Rebuilt the tipping modules - resulting in 10% more user tips
  • Fixed payments-related issues
  • Mentored the newcomers
  • Ran tipping-related experimentations
  • Adjusted accessibility of UI elements
Project Tech stack:
Android
RxJava
Dagger
Kotlin
Jetpack Compose
MVI
Bazel
Senior/Lead Android Developer
Nov 2020 - Dec 20222 years 1 month
Project Overview

On-demand delivery for businesses. Tech and logistics infrastructure to help enterprises scale delivery.

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Responsibilities:
  • Led a courier delivery app development process
  • Designed and implemented the app architecture (MVI - Redux)
  • Mentored a Junior developer
Project Tech stack:
Android
Kotlin
Java
MVI
Dagger
Kotlin
Unit testing
Analytics (Amplitude)
Firebase
Android Developer
Sep 2019 - Nov 20201 year 1 month
Project Overview

Application for managing IoT devices infrastructure.

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Responsibilities:
  • Was responsible for the entire IoT event system and data transfer.
Project Tech stack:
Android
Koin
Realm
Kotlin
RxJava
BLE
Firebase
Microsoft Azure
Android Developer
Mar 2020 - Jul 20204 months
Project Overview

Mobile application which helps retrace a potential COVID-infected person.

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Responsibilities:
  • Prepared the first PoC for the government client.
Project Tech stack:
Android
Kotlin
Koin
Google&Apple BLE Exposure Notifications module

Education

2019
Information technology
Bachelor's

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