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Daniil – Kotlin, Blockchain, Solidity, experts in Lemon.io

Daniil

From Ukraine (GMT+3)

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Mobile DeveloperSenior
Blockchain DeveloperSenior
Hire developer
12 years of commercial experience
Banking
Beauty
E-learning
Entertainment
Fintech
Healthcare
Public services
Hardware
LMS
Mobile apps
Platforms
Video streaming software
Gaming software
Lemon.io stats
2
projects done
1953
hours worked
Open
to new offers

Daniil – Kotlin, Blockchain, Solidity

Senior Mobile Developer with over 10 years of commercial experience behind his belt. Specializing in Android development using Kotlin, he has designed and developed numerous user-friendly apps published on the Google Play Store. Daniil is also a Senior Blockchain Developer who uses Solidity to create smart contracts on the Ethereum blockchain and has developed dApps to solve real-world problems. He holds a certification as a Solidity developer and has experience with standards such as ERC-20, ERC-721, and ERC-1155. Known for his strong problem-solving attitude and eagerness to learn new technologies.

Main technologies
Kotlin
8 years
Blockchain
2 years
Solidity
1.5 years
Additional skills
Android SDK
Java
REST API
SQLite
Swift
RoomDatabase
Koin
Firebase
Coroutines
Firebase Cloud Messaging
WebSocket
JSON
Node.js
Ethereum
Ready to start
ASAP
Direct hire
Potentially possible

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Experience Highlights

Senior Android Developer
Feb 2022 - Dec 202210 months
Project Overview

Payment system, where connect your favorite payment and commerce services, create beautiful customer journeys and expand into new markets fast—with one unified infrastructure.

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Responsibilities:
  • wrote documentation, feature holder, deadline holder
  • supported other platforms for a successful release
  • reviewed code and wrote tests
Project Tech stack:
Android
Android Studio
Kotlin
JWT
Gradle
OOP
SOLID
RPC
VirtualBox
Head of Mobile Department & Senior Android Developer
Dec 2020 - Oct 20219 months
Project Overview

Hardware devices and apps for Doctors and for Patients on Android&iOS where doctors can provide programs of rehabilitation to Patient's apps. A patient can handle weight-bearing on an injured leg with recommendation from app and from smart-crutch-tips devices.

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Responsibilities:
  • managed tasks for the team prepared solutions and documentations
  • made tests
  • prepared solutions
  • code of features
Project Tech stack:
Kotlin
REST API
RoomDatabase
DI via Koin
Firebase Cloud Messaging
MVI architecture
Coroutines for multitreading.
Tech Lead & Android Developer & NodeJS Developer.
May 2021 - Jul 20212 months
Project Overview

We with the team was created hardware devices and apps for Doctors and for Patients on Android&iOS where doctors can provide programs of rehabilitation to Patient's apps. A patient can handle weight-bearing on an injured leg with recommendations from the app and from smart-crutch-tips devices.

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Responsibilities:
  • built the app architecture and design system components
  • implemented workflows and guidelines for code consistency, readability, maintainability, and testability
Project Tech stack:
Kotlin
Navigation Component
RoomDatabase
Retorift2 for API
Firebase Crashlytics
Google Analytics
OAuth 2.0 for authorization.
Lead Mobile Developer & Android Developer.
Sep 2020 - Dec 20203 months
Project Overview

A service for teachers and students, where students can book a lesson and on this platform have a video chat with the teacher. Students can find a teacher with need skills of language.

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Responsibilities:
  • built the app architecture and implement workflows
  • managed tasks for the team, prepared solutions, and documentations
  • code reviewed
Project Tech stack:
Kotlin
WebRTC
RESP API
Firebase Cloud Messaging
InAppPurchase
RoomDatabase
ExoPlayer
Navigation Component.
Lead & Android developer
Nov 2017 - Oct 20202 years 10 months
Project Overview

The Social-casino Game. The team make a native app. A poker place where you can play with your friend by phone number matching, just for fun, not for real money.

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Responsibilities:
  • manageв a team with 3 developers, prepare solutions and develop an architecture of apps
  • developув code scalability, readability, maintainability, and testability apps
Project Tech stack:
Koltin
MVP
Firebase Cloud Messaging
WebSocket handling
Game Engine (Photon)
InAppPurchase
RoomDatabase
DI via Dagger 2
Clean Architecture
Lead & Android developer.
Jan 2019 - Mar 20192 months
Project Overview

App for voting for check rating of the potential president or other position in government.

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Responsibilities:
  • managed a team with 2 developers
  • prepared solutions
  • developed an architecture of apps.
  • developed code scalability, readability, maintainability, and testability apps
Project Tech stack:
Koltin
WSS
Firebase Cloud Messaging
Firebase Database
InAppPurchase
JetPack Components.
Software Developer.
Mar 2015 - Jun 20152 months
Project Overview

An app for safe skincare with check weather and sun affection for your face. An app to check the weather and level of ultraviolet and recommend what cream you have to use for your skincare to save it. By app, you can take a photo using some filters and tools you can check the damage level of your skin on your face.

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Responsibilities:
  • implemented new features
  • reviewed code
  • made tests
Project Tech stack:
Java
SQLite
Firebase Crashlytics
DI via Roboelectric
ButterKnife
JUnit
InAppPurchase
Camera API
REST API

Education

2017
Software Engineer
Master's

Languages

English
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