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Oleksandr – Flutter, Dart, JavaScript, experts in Lemon.io

Oleksandr

From Ukraine

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Mobile DeveloperSenior
Hire developer
12 years of commercial experience
AI
Business intelligence
Cybersecurity
Food and beverages
Gambling
Hospitality
Marketing
AI software
Collaboration tools
Customer support software
Mobile apps
SaaS
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Oleksandr – Flutter, Dart, JavaScript

Senior Mobile Developer with solid knowledge in Flutter. He is a professional Software Engineer with over 10 years of experience in a wide variety of business domains, among which are hospitality, cybersecurity, and AI tools. Oleksandr is all in for challenging projects like complex logic, processing big data, and code optimizations. During the interviewing stages, Oleksandr was observed as an efficient contributor ready to take responsibility for the architectural decision-making on the project - a perfect match to any project!

Main technologies
Flutter
5 years
Dart
5 years
Additional skills
JavaScript
Google Analytics
Ionic
Google Maps API
Redux
SQL
Polymer
C++
XML
Linux
Jira
jQuery
CSS
Docker
GoogleAPI
SASS
MongoDB
Node.js
Angular JS
React
Typescript
Firebase
Preact
SQLite
Scrum
OOP
Git
HTML
MySQL
MacOS
Subversion
CoffeeScript
CSS
GitHub
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Founder, Community Lead
Nov 2018 - Ongoing5 years 6 months
Project Overview

It is Lviv-based community of Flutter enthusiasts

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Responsibilities:
  • Built successful local community of Flutter and Dart enthusiasts from scratch
  • Conducted dozens of tech talks
Project Tech stack:
Flutter
Dart
Firebase
Google API and Services
Android
iOS
Mobile Development
Co-Founder, CTO
Apr 2020 - Nov 20222 years 6 months
Project Overview

It is the app that helps identify products and their recyclability score. Get info about materials and where to recycle them.

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Responsibilities:
  • Designed architecture of the whole product
  • Implemented mobile app from scratch
  • Designed flow for user edit suggestions
  • Migrated project to Dart sound null safety
  • Kept codebase and dependencies up to date
  • Mentored junior developers
Project Tech stack:
Flutter
Firebase
MongoDB
11ty
Serverless Computing
Senior front-end developer
Jan 2020 - Aug 20222 years 6 months
Project Overview

It is a human-centered performance management platform that creates effective managers, highly engaged employees, and top-performing organizations.

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Responsibilities:
  • Designed front-end architecture of the features worked on
  • Built front-end components library
  • Migrated the whole feature from Redux to React Query
  • Refactored codebase
  • Mentored junior developers
Project Tech stack:
React
Typescript
Node.js
Docker
HTML
CSS
Git
Flutter
Tech Lead, Architect
Feb 2019 - Dec 201910 months
Project Overview

Digital solutions for the HoReCa industry, including orders, logistics, bookings, etc

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Responsibilities:
  • Designed data layer services for connection web and mobile apps with salesforce
  • Designed event-driven architecture for data synchronization between internal services and Salesforce
  • Designed Marketing Cloud Custom Activity to provide a way to use internal notification manager service in MC Journey Builder
  • Customized and managed CI/CD and Heroku infrastructure
  • Assisted and mentored other engineers in their professional development
  • Led development
  • Mentored other developers
Project Tech stack:
Node.js
PostgreSQL
Heroku
Salesforce
Nest.js
RabbitMQ
Flutter
Senior Software Engineer, Tech Lead
Aug 2018 - Nov 20182 months
Project Overview

The project is about Big Data and Artificial Intelligence. The application aims to generate a set of trained models for regulatory purposes and to feed chosen models into a downstream system for real-time decisions.

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Responsibilities:
  • ​Built frontend charts library using d3.js
  • Implemented reports management
  • Assisted and mentored other engineers in their professional development
  • Led data visualization development
  • Mentored other developers
Project Tech stack:
React
Node.js
Docker
PostgreSQL
D3.js
Redux
Senior Software Engineer
Apr 2018 - Sep 20185 months
Project Overview

The platform aims to protect organizations from cyber-attack by eliminating the threat of malware, isolating and executing all Web content in the cloud, and enabling users to interact with websites, links, and documents online safely.

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Responsibilities:
  • created front-end and back-end architecture;
  • built front-end components library;
  • implemented data query builder;
  • implemented report visualisation using d3.js;
  • implemented PDF report generation;
Project Tech stack:
React
Node.js
Redux
D3.js
Express.js
Redis
Puppeteer.js
Pdfkit
Tech lead, Architect
Oct 2017 - Apr 20186 months
Project Overview

Service designed to help businesses reach more customers by improving their online brand. Using this service, users can deliver clear insight and simple guidance about their businesses' online and social media reputations. Also, it performs data analysis to evaluate the online presence, user's website, search results, reviews and social media

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Responsibilities:
  • created front-end and back-end architecture;
  • implemented advanced online presence analysis;
  • redesigned the existing front-end;
  • built front-end components library;
  • wrote unit, integration and e2e tests;
  • integrated with different providers;
Project Tech stack:
React
Node.js
PostgreSQL
Data Structures
Google Map API
Docker
Express.js
Tech lead
Dec 2016 - Oct 201710 months
Project Overview

The goal of the project is to rebuild an existing betting platform that provides access to all content and products online to a new one that will offer innovative multi-channel products and services for their customers.

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Responsibilities:
  • created front-end and back-end architecture;
  • built front-end components library;
  • wrote unit, integration and e2e tests;
  • integrated with custom hardware;
Project Tech stack:
React
Electron.js
Node.js
Docker
Web Sockets

Education

2016
Applied mathematics
Master's degree

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