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Oleh – Node.js, Kotlin, Android, experts in Lemon.io

Oleh

From Ukraine (GMT+3)

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Back-end Web DeveloperSenior
Tech lead
Hire developer
12 years of commercial experience
Accounting
Advertising
Consumer goods
Consumer services
Entertainment
Hospitality
Marketing
Sports
Hardware
Mobile apps
Web3
Lemon.io stats
1
projects done
1901
hours worked
Open
to new offers

Oleh – Node.js, Kotlin, Android

Oleh knows that a proper answer starts with the right question. He knows what he’s doing, can explain exactly why, and teach others. Of course, it has a lot to do with enormous expertise and skills. He is the founder and CEO of the successful start-up ScrapingAnt, and currently looking for a new challenging position! Oleh’s image is complete with openness, a positive attitude, and a lovable personality.

Main technologies
Node.js
5 years
Kotlin
1 year
Android
1 year
Typescript
3 years
Clean Architecture
1 year
Additional skills
Dagger
MVP
Vue.js
Firebase
Coroutines
MVVM
Retrofit
Docker
Redis
Kubernetes
Firestore
Ready to start
ASAP
Direct hire
Potentially possible

Ready to get matched with vetted developers fast?
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Experience Highlights

Lead Full Stack Developer
Feb 2022 - Jul 20231 year 5 months
Project Overview

Tournament experience for street dancers. The application is available on Android and iOS and allows dancers across the globe to challenge each other into dance battles.

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Responsibilities:
  • Mitigated firestore limitations with a minimum code by migrating several data stores to SQL database (for having more advanced aggregation features)
  • Implemented the automated royalty tracking system
  • Implemented the automated royalty-enabled media ingestion
  • Implemented a high-performance commenting system with additional caching over Firestore
  • Implemented AWS deployment procedures using a serverless framework
  • Set up manual and code-defined AWS infrastructure for cheaper costs as well as for high performance and high availability
  • Owned the Android part of the application with established release procedures
  • Was responsible for Android features implementation and bug fixing
Project Tech stack:
Typescript
JavaScript
Python
AWS
GCP
Docker
AWS Lambda
Firestore
Team/Teach Lead. Architect.
Jul 2020 - Jan 20221 year 6 months
Project Overview

Web-based accounting and invoicing system

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Responsibilities:
  • Implemented and managed the system design;
  • Coordinated and mentored the team;
  • Developed project architecture.
Project Tech stack:
Node.js
Vue.js
Typescript
MySQL
Microsoft Azure
Redis
Team Lead
Aug 2019 - Apr 20211 year 7 months
Project Overview

B2C solution for the biggest hotel and casino chain in Asia. Mobile application allows people to book a room, redeem a casino points, etc. Mainly it provides a virtual redemption office for the casino players.

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Responsibilities:
  • Managed the international team of 6 Android developers;
  • Implemented the best Agile practices;
  • Performed code review;
  • Planned technical roadmap.
Project Tech stack:
Android
Java
Kotlin
Lead Developer
Jul 2018 - Aug 20191 year 1 month
Project Overview

Smart hotel room application for the biggest hotel and casino chain in Asia. The application was implemented to control the Android system and to be executed on an embedded Android device. This application allows hotel guests to control whole room switches, lights, TV, music, etc. Also, it allows to order laundry service and food, so all the actions can be performed from the bed.

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Responsibilities:
  • Built the app architecture and maintained the codebase;
  • Implemented features;
  • Set up in-house IoT mesh.
Project Tech stack:
Android
Java
Kotlin
Software Developer
Apr 2015 - Jun 20183 years 2 months
Project Overview

B2C product. Official cross-platform application to control and maintain portable hard drives. This application is contained in brand's portable hard drives since 2017. It allows a user to make backups, drive health monitoring, download control and many more. Any additional functions can be added using a unique plug-in system.

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Responsibilities:
  • developed new features;

  • performed code review;

  • developed native code for both Windows and Mac.

Project Tech stack:
Electron.js
Node.js
JavaScript
React
C#
Objective C
Founder and CEO
Apr 2020 - Unfinished4 years 5 months
Project Overview

It is a SaaS service that provides an ability to scrape web resources without getting blocked by a CAPTCHA/Cloudflare. The idea behind the project is to provide an API access to a headless Chrome cluster that connected to thousands of proxies around the globe, so each request to the target page is looks like a request from a real user. The service allows automating data mining and data extraction, so it helps digital agencies, researchers, stock and crypto traders and many more.

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Responsibilities:
Project Tech stack:
AWS
Typescript
Vue.js
Node.js
Python
PostgreSQL
Kubernetes
Docker
Redis

Education

2014
Cybersecurity and computer science
Bachelor's
2014
Cybersecurity and computer science
Bachelor's

Languages

English
Advanced

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