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Valentyn – React, Ruby on Rails, JavaScript, experts in Lemon.io

Valentyn

From Ukraine (GMT+3)

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Front-end Web DeveloperSenior
Back-end Web DeveloperMiddle
Hire developer
8 years of commercial experience
Agritech
AI
Data analytics
E-commerce
Fintech
Telecommunications
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Valentyn – React, Ruby on Rails, JavaScript

Valentyn is a Senior Front-End Web Developer with excellent knowledge of JS fundamentals. His great communication skills and English mixed with confidence are what make Valentyn a wonderful asset for any team. His previous experience includes working on a cannabis production platform (yes! You get it right!); a vendors and suppliers marketplace, and a TV-devices interaction tool. Valentyn is ready to dig his teeth into something new!

Main technologies
React
6 years
Ruby on Rails
1.5 years
JavaScript
6 years
Additional skills
Ramda
Redux Saga
Git
ESLint
ECMAScript
Redux
Express.js
Node.js
Material UI
Jest
Enzyme
Webpack
Formik
Axios
SASS
Redux Toolkit
Tailwind CSS
Storybook
Typescript
Vite
Playwright
XML
Ready to start
To be verified
Direct hire
Potentially possible

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Experience Highlights

Front-end Tech Lead
Feb 2022 - Ongoing2 years 10 months
Project Overview

A fintech startup that aims to improve credit scores and bill pay experience. The app makes it easy for people to consolidate their bills on the platform and pay them on time. It also provides a line of credit to report positive payment history to all major credit bureaus and help build credit.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Led the front-end implementation of a few web applications
  • Managed front-end infrastructure and tooling
  • Reviewed pull requests, consulted, and helped other team members on any FE topic
  • Reviewed product requirements, provided feedback, contributed to project planning activities
  • Contributed to the BE part of the system by tackling tasks of any complexity
Project Tech stack:
React
JavaScript
Typescript
Vite
Redux Toolkit
Tailwind CSS
Storybook
Jest
Ruby on Rails
Senior Front-end engineer
May 2020 - Jan 20221 year 8 months
Project Overview

Leading cannabis production platform servicing the U.S. market. The idea is to take the technical expertise and apply it to the cannabis market, developing a platform that allows growers to grow more efficiently and increase their yields – and to do so consistently and at scale.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Designed, coded, and debugged web applications with minimal oversight and direction
  • Incorporated user feedback to improve software design and function
  • Reviewed product requirements, provided feedback, and contributed to project planning activities
  • Contributed to and maintained design and user documentation
  • Developed unit test and module simulation strategies for software validation
  • Participated in build and test automation and other efficiency improvement initiatives
  • Worked closely with the product development team to review input from customers to help respond to their short and long-term needs
  • Wrote documentation and requirements for QA to test deliverables
  • Analyzed requirements, defined and prioritized tasks, and contributed to program management
Project Tech stack:
React
JavaScript
Redux
Vite
Material UI
Formik
Ramda
Jest
Enzyme
Playwright
Front-end engineer
Sep 2019 - Apr 20207 months
Project Overview

A platform for IT vendors, suppliers, distributors, resellers, users. Social marketplace based on AI solutions connecting users and merchants allowing to find the best products for the best price.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Participated in building and improving project architecture
  • Provided front-end solutions for complex systems
  • Was in charge of troubleshooting and bug fixing; code review
  • Took care of performance optimization
Project Tech stack:
React
JavaScript
Redux
Redux Saga
Axios
Node.js
Express.js
SASS
Webpack
Front-End Engineer
Jan 2019 - Sep 20197 months
Project Overview

An application that finds a «lookalike» audience based on Artificial Intelligence and Human Intelligence approaches.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Implemented business logic
  • Created new features and UI
  • Took care of code review
Project Tech stack:
React
JavaScript
Redux

Education

2019
Applied Mathematics and Informatics
Bachelor
2020
Applied Mathematics and Informatics
Master

Languages

English
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