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Volodymyr – Firebase, React, Node.js, experts in Lemon.io

Volodymyr

From Belgium (UTC+2)flag

Team lead
Full-stack Web Developer|Senior
Lemon.io stats
1
projects done
3256
hours worked

Volodymyr – Firebase, React, Node.js

With over 7 years of commercial experience in Node.js and React development, Volodymyr demonstrates exceptional proficiency in Node.js fundamentals, JavaScript, and diverse tools. Moreover, as the CEO and CTO of his personal project, a marketplace he built from scratch to book photographers online, Volodymyr has demonstrated entrepreneurial spirit and leadership skills. Volodymyr's practical expertise spans backend architectures like monolith, microservices, and serverless, coupled with a strong command of the React/Redux ecosystem, making him an ideal choice for any project setup, whether within a team or as an individual developer.

8 years of commercial experience in
Analytics
Art and creativity
Cybersecurity
E-commerce
Healthcare
Retail
Social media
Telecommunications
Marketplace
Open source
CRM
Geospatial software
Platforms
Main technologies
Firebase
2 years
React
6.5 years
Node.js
6 years
AWS
1 year
Typescript
2 years
Next.js
1 year
JavaScript
7 years
Additional skills
MySQL
PostgreSQL
Express.js
Web Sockets
Angular
Nest.js
Vue.js
GCP
MongoDB
Microsoft Azure
Microservices
DynamoDB
gRPC
Socket.io
GitHub Actions
CI/CD
Docker
Chat bots
OpenAI
GPT-3
Rewards and achievements
Swift communicator
Direct hire
Possible
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Experience Highlights

CEO / CTO
May 2020 - Jan 20232 years 8 months
Project Overview

A marketplace to book a photographer online, offering the great utility of distinct photographer services listed separately. It provides the ability to search anywhere at any time, with a wide variety of choices! Volodymyr created this project from scratch.

Responsibilities:
  • Designed the infrastructure
  • Implemented core features
  • Designed data schemas
  • Pitched the project to investors and accelerators
  • Joined the Techseed acceleration program in Gdansk in 2021
Project Tech stack:
React
Firebase
Google Analytics
Node.js
Vite
Webpack
Typescript
Cloud Firestore
Google Maps API
Google API and Services
GitHub Actions
Full-Stack developer
Jan 2021 - Oct 20221 year 9 months
Project Overview

Real-time analytics for websites. The client can access a user journey on their website, tracking users' locations and their navigation from page to page. This information is displayed on their website dashboard as small dots moving between pages. Depending on the package, clients can also view details such as countries, IPs, and more.

Responsibilities:
  • Optimized architecture
  • Refactored the billing system
  • Migrated the front end to React (though development was paused due to insufficient funds)
Project Tech stack:
Angular JS
WebSocket
Socket.io
Web Sockets
gRPC
Full-Stack Software Engineer
Nov 2020 - Oct 202111 months
Project Overview

This project was being developed during the COVID pandemic, with the primary focus on creating extensive virtual spaces for large corporations — like Zoom on steroids, featuring live chat, sessions, and webinars. A sort of Metaverse in the browser.

Responsibilities:
  • Optimized the Authentication System *Refactored the code *Implemented new features, including chat with emojis, a virtual gallery of sessions (similar to VR, scrollable around you), and hubs for waiting *Created a user journey through the event itself with watched videos tracking, new steps unlocking, pages, and rewards *Incorporated multiple new features into the Admin panel
Project Tech stack:
Node.js
PostgreSQL
React
Amazon S3
AWS Lambda
AWS
DynamoDB
API Gateway
Typescript
Sequelize ORM
Algorithms and Data Structures
Express.js
Swagger
Full-Stack Software Engineer
Sep 2020 - Sep 20211 year
Project Overview

It's a complex CRM system for medical corporations. The goal is to manage relevant information about the region, necessary documents, allowances, etc.

Responsibilities:
  • Migrated the React code to the newer version
  • Added Typescript to the front end
  • Optimized DB requests
  • Added new features and refactored the flows
Project Tech stack:
Node.js
Express.js
Typescript
React
MongoDB
MongooseODM
Full-Stack Developer
May 2020 - Oct 20205 months
Project Overview

An open-source freelance idea aimed at creating a space for people from post-Soviet countries, primarily to foster startup culture and facilitate the flow of ideas.

Responsibilities:
  • Created the back-end API
  • Was in charge of front-end pages
  • Actively participated in weekly sessions
Project Tech stack:
Vue.js
Vuetify
Nest.js
Node.js
Algorithms and Data Structures
Senior Software Engineer / Team Lead
Jan 2023 - Unfinished2 years 11 months
Project Overview

Service for providing information about organization security and vulnerabilities.

Responsibilities:
  • Designed a new architecture of the service and implemented it with the team under heavy deadlines
  • Migrated the old Infrastructure to the new one
  • Improved speed from a minimum 6x up to 30x speed of execution compared to the previous
  • Ensured faster replies, smaller sizes, and more reliable server work with error and edge case handling
Project Tech stack:
React
Node.js
Express.js
Web Sockets
Socket.io
CI
CD

Education

2017
International Economics
Master

Languages

English
Advanced

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