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

Vsevolod

From Ukraine (GMT+2)

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Mobile DeveloperSenior
Hire developer
12 years of commercial experience
Advertising
Communications
Cryptocurrency
Fintech
Healthcare
Social media
Communication tools
Messaging software
Mobile apps
Lemon.io stats
3
projects done
2492
hours worked
1
offers now 🔥

Vsevolod – Android, Kotlin, Java

With a strong background in Android development, Vsevolod has been working with Kotlin since its first beta versions. He has significant experience in building products from the ground up. Additionally, Vsevolod is adept at mentoring, making him a versatile and experienced asset to any team.

Main technologies
Android
7 years
Kotlin
5 years
Java
7 years
REST API
1 year
SQLite
5 years
Additional skills
Dart
MongoDB
SQL
OOP
Clean Architecture
Android Architecture Components
Coroutines
TDD
HTTP
Web Sockets
gRPC
RoomDatabase
Realm
Maven
Gradle
Retrofit
OkHttp
Google Play Services
Firebase
BLE
CI
Android Studio
IDEA
Eclipse
Jenkins
Postman
Sketch
Git
Dagger
MVVM
MVP
RxJava
Jetpack Compose
Firebase Cloud Messaging
Google Analytics
React Native
Flutter
Koin
MVC
Figma
Unit testing
Mockito
Rewards and achievements
Client's favourite
Testimonials
"We have nothing but the best things to say about Seva and his performance. We have simply completed the project that he was working on and we are holding him back by keeping him. He is a great engineer and Lemon has been great to work with! I'd gladly use your service again in the future. "
Ready to start
ASAP
Direct hire
Potentially possible

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Experience Highlights

Senior Android Engineer
Sep 2023 - Aug 202411 months
Project Overview

The app was called Goldfish. It was created for the bowling centers to encourage employees to work by gamifying the work process. Polls, goals, leaderboards, etc.

Skeleton
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Responsibilities:
  • Built the app with a lot of custom animations
  • Entire app was written on Compose
Project Tech stack:
Jetpack Compose
Android SDK
Senior Android Engineer
Feb 2023 - Jul 20235 months
Project Overview

A VoIP application for calls between doctors and their patients. You can make a call, receive it, write messages, and record voicemails.

Skeleton
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Responsibilities:
  • Fixed difficult bugs that previous devs were not able to fix
  • Added new functionality to the app and analytics
  • Moved React Native code to the new functional approach
Project Tech stack:
Android
React Native
Kotlin
Senior Android Engineer
Apr 2022 - Feb 202310 months
Project Overview

The app was about vehicle services in the US. The app is entirely written on Compose from scratch. We've used the latest approaches in the Android world.

Skeleton
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Responsibilities:
  • Created the core basics of the project
  • Was responsible for the architecture part of the app
Project Tech stack:
Jetpack Compose
Android SDK
Senior Android Engineer
Nov 2021 - Apr 20225 months
Project Overview

A bitcoin wallet. It serves to receive and send bitcoins to other wallets. Main features:

  • Is written completely on Jetpack Compose
  • Uses LND library internally for blockchain
Skeleton
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Responsibilities:
  • Wrote the app from scratch;
  • Adjusted Jeckpack Compose;
  • Figured out how to work with LND.
Project Tech stack:
Kotlin
Clean Architecture
Coroutines
Jetpack Compose
UDF
Lnd
Android Feature Lead
Jun 2019 - Jun 20212 years
Project Overview

Secure messenger that is supposed to be built on Blockchain. The team finished the mobile part, but Blockchain wasn’t ready in time. The project was closed because the company ran out of funds.

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Responsibilities:
  • Developed a secure messenger from scratch;
  • Implemented audio/video/image upload to the server;
  • Took part in architecture discussions;
  • Performed code reviews;
  • Implemented audio/video playback;
  • Created full offline mode for a messenger;
  • Developed group chats feature.
Project Tech stack:
MVVM
Kotlin
RxJava
Dagger
Android Feature Lead
Aug 2018 - Jun 201910 months
Project Overview

A social network with a bunch of different functionalities. The main idea of this network was that a person would receive 1 “nim” for 1 minute of his life. After that, he could exchange it for some internal or external goods. Closed due to insufficiency of funds.

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Responsibilities:
  • Built very difficult custom views with custom animations;
  • Decoupled the monolith project into modules using Dagger2. An additional difficulty was not breaking anything and splitting it step by step in order for other devs to start using this approach;
  • Improved git workflow and work process;
  • Performed code reviews;
  • Mentored a team of developers.
Project Tech stack:
MVP
Dagger
RxJava
Kotlin
Android Feature Lead
Nov 2017 - Aug 20189 months
Project Overview

A small outsourcing company where he built a lot of projects from scratch: from book readers to social networks and MiBand Bluetooth app. In this company, he started to use Kotlin in production from the 0.6 beta version.

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Responsibilities:
  • Kept track of his team members' professional development;
  • Participated in daily meetings with the clients;
  • Made educational presentations for a team of developers;
  • Performed code reviews;
  • Developed software architecture for different projects.
Project Tech stack:
Java

Education

2014
Finance
Bachelor

Languages

English
Advanced

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