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Ihor – Python, React, Node.js, experts in Lemon.io

Ihor

From Ukraine (UTC+3)

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Full-stack Web DeveloperSenior
Hire developer
12 years of commercial experience
AI
Cloud computing
Cybersecurity
Hospitality
Maritime
Media
Retail
Marketplace
HRMS
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Ihor – Python, React, Node.js

Ihor is an experienced full-stack developer with a strong focus on back-end development, particularly excelling in Python and React. He has demonstrated excellent communication and English proficiency during our vetting process. Ihor brings expertise in handling large-scale applications and processing significant amounts of data and has showcased decision-making abilities by providing various suggestions for achieving long-term sustainability and quick delivery. He also possesses a deep understanding of system operations and strong knowledge of observability. Additionally, Ihor holds degrees in Applied Mathematics and International Economic Relations.

Main technologies
Python
7 years
React
3 years
Additional skills
Node.js
Django
PostgreSQL
Express.js
Django REST
Docker
Koa.js
FastAPI
AWS
Amazon S3
Vanilla JS
Git
RabbitMQ
Celery
DigitalOcean
Kubernetes
MongoDB
DevOps
Amazon SQS
Flask
Kafka
Redux
Typescript
Next.js
AWS CloudFormation
Jenkins
Ready to start
To be verified
Direct hire
Potentially possible

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Experience Highlights

Senior Back-End Engineer
Mar 2022 - Ongoing2 years 10 months
Project Overview

Continuous performance measurement platform designed to enhance organizational effectiveness through systematic evaluations. It supports recurring performance reviews, check-ins, 1-on-1 meetings, objectives tracking, calibration sessions, and more!

Skeleton
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Responsibilities:
  • Maintained existing features to ensure continuous functionality and stability;
  • Led execution of feature development, adding new functionalities to meet evolving requirements;
  • Contributed to customer support and issue resolution;
  • Improved performance by writing performance tests and adjusting code;
  • Took part in organizing a microservices environment for the development of new features;
  • Worked on both frontend and backend components of the application;
  • Handled unit tests maintenance and creation;
  • Contributed to the creation of performance tests.
Project Tech stack:
Django
Django REST
Celery
Express.js
React
React Query
jQuery
Tailwind CSS
CircleCI
Docker
Kubernetes
PostgreSQL
DynamoDB
Redis
AWS
Sentry
Datadog
Unit testing
Senior Software Engineer
Jun 2021 - Dec 20216 months
Project Overview

Platform designed for restaurant management, created for managing restaurant operations. It allows the staff to efficiently handle order processing, update and manage menus, process various forms of customer payments, and automate the generation of employee paychecks, thereby enhancing overall productivity and customer satisfaction.

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Responsibilities:
  • Led the engineering team of the project, executing product goals;
  • Worked on frontend and backend components of the application;
  • Resolved various issues and implemented tests;
  • Maintained and adjusted project infrastructure;
  • Improved deployment processes.
Project Tech stack:
Node.js
ASP.NET CORE
React
Redux
Docker
PostgreSQL
DynamoDB
AWS CloudFormation
Amazon S3
AWS Lambda
Python
Tornado
Amazon CloudFront
Software Engineer
Jul 2020 - Jun 202110 months
Project Overview

Platform enabling organizations to develop and deploy AI solutions for various applications, such as agriculture, manufacturing, and healthcare. This tool allows non-technical users to build, train, and retrain AI models, enhancing efficiency and quality control.

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Responsibilities:
  • Worked on existing product features development and maintenance;
  • Refactored sub-product, rewriting current functionality to a new framework;
  • Led team of engineers on microservice development;
  • Designed microservice architecture and executed the implementation;
  • Set up Kubernetes environment for the microservice and maintained its infrastructure;
  • Led the backend refactoring on a side project and worked on integration with the main product.
Project Tech stack:
Flask
FastAPI
Django
Vue.js
Kubernetes
Docker
Jenkins
MySQL
DynamoDB
Sentry
Unit testing
Integration testing
Senior Software Engineer
Aug 2017 - Aug 20203 years
Project Overview

A leading media and technology company with origins dating back to 1839 that operates in media, online marketplaces, and technology ventures. The company is dedicated to empowering people in their daily lives through its diverse range of services and innovative solutions.

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Responsibilities:
  • Worked on the existing product features development and maintenance;
  • Migrated the company's platform to a new tech stack;
  • Led a sub-projects team;
  • Designed project architecture and executed the implementation;
  • Set up the development environment.
Project Tech stack:
Express.js
Django
Symfony
React
Redux
Redux Thunk
Docker
Jenkins
MySQL
MongoDB
Neo4j
Software Engineer
Jul 2016 - Aug 20171 year 1 month
Project Overview

Global provider of automated testing and assurance solutions for networks, security, and positioning. These solutions address next-generation technologies' increasing complexity and security vulnerabilities, enabling clients to deliver innovative products and services confidently.

Skeleton
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Responsibilities:
  • Set up the development environment;
  • Migrated product features from legacy implementation into a new tech stack;
  • Worked on shared components library implementation;
  • Handled testing protocol definitions in middleware service;
  • Set up the package distribution.
Project Tech stack:
Python
React
Redux
Redux Thunk
Jenkins
CouchDB
MariaDB
Software Engineer
Jan 2016 - Jul 20165 months
Project Overview

The project served as a bridge from legacy IT infrastructure to advanced infrastructure technology, leveraging open-source components. It enables flawless scalability, enterprise-level stability, and the development of customer-tailored solutions based on specific company needs.

Skeleton
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Responsibilities:
  • Worked on setup and maintenance of frontend infrastructure;
  • Developed frontend components and backend integration;
  • Contributed to creating middleware service binding system components and providing API for clients.
Project Tech stack:
AWS
Jenkins
Python
Flask
Node.js
Express.js
Sequelize ORM
Angular
Socket.io
MySQL
Redis
Full-Stack Javascript Developer
Jul 2015 - Jan 20166 months
Project Overview

Mobile marketplace application for buying and selling goods, tailored explicitly for the Netherlands. This platform facilitates seamless transactions between buyers and sellers, offering a user-friendly interface for managing items, browsing categories, and secure payments.

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Responsibilities:
  • Worked on setting up backend API environment and infrastructure;
  • Set up databases and architecture design for backend API service;
  • Handled the development of the backend API application;
  • Was dedicated to integrating third-party systems.
Project Tech stack:
Node.js
Express.js
MySQL
Sequelize ORM
Redis
AWS

Education

2014
Applied Mathematics and fundamental science
Bachelor’s
2015
Information and communication technologies
Master’s
2024
International Economic Relations
Master’s

Languages

English
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