Logo
Roman – Node.js, React, React Native, experts in Lemon.io

Roman

From Ukraine (GMT+2)

flag
Full-stack Web DeveloperMiddle-to-senior
Mobile DeveloperMiddle
Hire developer
7 years of commercial experience
Administration
AI
Analytics
Design
E-commerce
E-learning
Edtech
Job and career services
Management
Media
Networking
Photography
Productivity
Recruiting
Social media
Marketplace
Rental
Messaging software
Mobile apps
Platforms
Lemon.io stats
4
projects done
947
hours worked
1
offers now 🔥

Roman – Node.js, React, React Native

Meet Roman — a strong Middle-to-senior Full-Stack Developer focused more on Front-End. Roman has a deep understanding of React, React Native, and Node.js and experience in e-commerce, fintech, and healthcare. He is excited about projects that involve a social factor and are meant to help people. His previous experience includes working on a photo/video-sharing platform, an invoice-creating app, and an educational mobile app. Roman is ready for new challenges!

Main technologies
Node.js
5 years
React
5 years
React Native
4 years
Typescript
3 years
Next.js
2 years
JavaScript
1 year
Additional skills
Firebase
AWS
Meteor
Git
MongoDB
MySQL
Cordova
Redux
GCP
Stripe API
Jest
Cypress
Tailwind CSS
Nest.js
Context API
Material UI
Storybook
Rewards and achievements
Client's favourite
Swift communicator
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Senior Integration Developer
Apr 2024 - Jul 20243 months
Project Overview

The company specializes in AI and Machine Learning solutions for data analysis, process automation, and business optimization across industries like finance, healthcare, and logistics.

Skeleton
Skeleton
Skeleton
Responsibilities:

CRM System Integrations:

  • Integrated with popular CRM systems such as Salesforce, Zoho, and HubSpot.
  • Optimized lead and proposal creation processes within CRM systems.
  • Developed data mapping between CRM systems and Monterra.ai.
  • Updated and improved the settings page for integrations.

Performance and Functionality Enhancements:

  • Improved data synchronization performance between systems.
  • Added a mechanism for rapid expansion of integration functionalities.
  • Developed an access management system for different types of clients.

Using Google API:

  • Determined and set map points based on address data using Google API.
  • Optimized the number of requests to external services for increased efficiency.

Documentation and Analysis:

  • Created UML diagrams for integrations.
  • Compared the advantages of various services based on integration diagrams.
  • Generated documentation using Typedoc.
  • Fixed bugs to improve system reliability and performance.

Achievements:

  • Increased data synchronization speed by 30%.
  • Reduced the number of external requests by 25% through process optimization.
  • Successfully integrated with three major CRM systems, expanding the company's client base.
  • Improved user experience by updating the settings page interface.
  • Developed a scalable system that allowed for rapid addition of new features and improvements.
  • Enhanced documentation quality and coverage using Typedoc.
  • Resolved critical bugs, leading to a more stable and robust integration platform.
Project Tech stack:
React
Context API
Salesforce
Typescript
Supabase
Next.js
Hubspot
Front-End Developer
Jun 2023 - Aug 20232 months
Project Overview

This is a content-based messager that can push announcements and create groups by interests to link them and share events.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Created cache functionality;
  • Added new modal windows;
  • Worked on improving performance;
  • Debugged and resolved the application issues;
Project Tech stack:
React Native
Firebase
Firebase Cloud Messaging
Full-Stack Developer
Jul 2021 - Jan 20231 year 6 months
Project Overview

This is one of the biggest photo, video, and news platforms. Users can add images and get money for other people using them.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Was responsible for the structure of new features, developing them, and delivering them to production;
  • Wrote tests;
  • Reviewed the code of other developers;
  • Refactored and simplified the codebase.
Project Tech stack:
React
Typescript
AWS
Next.js
Node.js
Serverless Computing
Terraform
Nest.js
AWS Lambda
Storybook
Material UI
Mobile Developer
Aug 2021 - Nov 20212 months
Project Overview

The application allows users to create invoices and propose their work to another customer in Italy. Also, users could see dashboards with their income and other info.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Was responsible for creating new screens for the application;
  • Wrote tests and implemented new designs;
  • Managed translations;
  • Implemented a new flow for unauthorized users.
Project Tech stack:
React Native
Redux
Front-End Developer
Jul 2020 - Jul 20211 year
Project Overview

The website allows users to rent places for work in the office or table in co-working around the world. Сustom solution for e-commerce. By using the site, people book desks/offices, etc., that match their locations. Users can add guests, buy products, and visit events in co-working spaces.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Developed features (register guests, events registration);
  • Added custom UI elements;
  • Wrote unit tests;
  • Was responsible for code refactoring;
  • Worked on real-time notifications;
  • Re-designed some old pages.
Project Tech stack:
React
Typescript
GraphQL
Jest
Cypress
Context API
Storybook
Semantic UI
Full-Stack Developer
May 2020 - Oct 20205 months
Project Overview

An educational mobile app where any person can find a mentor in different areas of expertise. By using custom goals and video/text chats, users enhanced their skills in different areas.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Developed features (text chat, goals logic);
  • Was responsible for mentoring other team members;
  • Refactored part of the code;

The main challenge was migration from Cordova to React-Native.

Project Tech stack:
React
Cordova
React Native
AWS
Firebase
RealTime DB
Auth
Functions
Mobile Developer
Nov 2018 - Jun 20201 year 6 months
Project Overview

Mobile app for people to connect them by interest in the nearest location, by geolocation and Bluetooth.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Was responsible for the mobile part of the architecture and developing features;
  • Worked on improving design mockups;
  • resolved issues with native iOS and Android platforms;
Project Tech stack:
React Native
Node.js
MongoDB
GQL
Front-End Developer
Aug 2019 - Feb 20206 months
Project Overview

Helps select materials and book time for measuring rooms. Also helps order some materials with tracking of implementation.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Was responsible for developing features;
  • Created architecture for the front-end side;
  • Delivered them to production;
  • Fixed issues.
Project Tech stack:
React
Redux
Ant Design
Context API
Full-Stack Developer
Aug 2018 - Feb 20196 months
Project Overview

The website for the aggregation of ethernet providers and VoIP companies with their own services such as ‘whois’, ‘BGP check’, etc. By using these services, people also ask for sell/rent IP v4 addresses and sub-networks.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Developed features (such as DNS lookup, whois, etc.);
  • Managed the database;
  • Improved UI;
  • Parsed sites for contacts.

Challenges on this project: direct work with Mongo, adding network utilities, parsing creation (was the biggest one because of the huge complexity and wide variety of contacts formatting).

Project Tech stack:
Meteor
React
MongoDB
Node.js
Senior Full-Stack Developer
Feb 2023 - Unfinished1 year 4 months
Project Overview

This is a start-up platform for hiring candidates for IT jobs, with matching features and subscriptions.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Created front-end and back-end features;
  • Redesigned the existing front end;
  • Implemented integration with ATS;
  • Implemented Whatsapp notifications.
Project Tech stack:
React
Node.js
AWS
MongoDB
Typescript
Context API
Material UI

Education

2023
Computer Science
Master

Copyright © 2024 lemon.io. All rights reserved.