Green leaf

Sergey J - React developer
Member since:May 03, 2022
Profile last updated:Nov 08, 2022
Last activity:Nov. 30, 2022, 4:29 p.m. UTC
LD Interview score: 3.7 / 5
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Sergey J

I am Sergey Jin. I am a full stack engineer which means I can work both on the frontend and backend. I love working as frontend dev.

Skills:    ·   ·   ·   ·   ·   ·   ·    ·    ·    ·    ·    ·    ·    ·    ·    ·    ·    · 
Weekly Availability: 68 hours
Sun16 - 2408 - 16
Mon09 - 1901 - 11
Tues09 - 1901 - 11
Wed09 - 1901 - 11
Thurs09 - 1901 - 11
Fri09 - 1901 - 11
Sat09 - 1901 - 11

Hourly Rate:$50.00
Experience:9 yrs
React:5 yrs
CSS:4 yrs
Laravel:4 yrs
Nodejs:3+ yrs
PHP:3+ yrs
MongoDB:3 yrs
React native:3 yrs
Engineer's Devices:

LD Talent Work History

Average response time:
12.0 hours
Avg count of messages / Day:
Average client satisfaction:



Self Employed     CryptiSwap     Full Stack Developer     Employment
May 2020 - Present

  • I used Nextjs, React, and Redux for frontend and built smart contracts using Solidity. Blockchain is one of my passions.
  • Building smart contracts using hardhat was a new challenge for me.

Skills used: NextJS, React, Redux, Solidity, Blockchain

Link to the project:
Smart Cities Transport     SneakQik     Full Stack Developer     Contract
Nov 2020 - Aug 2021

  • I used NextJS, React, and Material Design for frontend, Nodejs for backend, MySQL for database.
  • We needed mobile apps. So we decided to use Ionic Cordova for building mobile apps.

Skills used: NextJS, React, Ionic, Material Design, MySQL, Nodejs

Link to the project:
Teamvate     Full Stack Developer     Contract
Jun 2018 - May 2021

  • The admin panel and backend API were built with Laravel. And the mobile apps (Android and iOS) were built with React Native.
  • In this company, we often use MERN stack (React, Nodejs, ExpressJS, and MongoDB) to carry out the clients' requirements.

Skills used: MongoDB, Laravel, React, React native, ExpressJS, Nodejs

Link to the project:
CBX Software     JockGod     Full Stack Developer     Employment
Oct 2018 - Apr 2020

  • JockGod is wordpress website. We used CSS for customization, PHP and MySQL for the backend.
  • I customized the Dating Wordpress theme and integrated CCBill payment gateway.

Skills used: Wordpress, PHP, MySQL, CSS

Link to the project:
B.V     Tour Wiith Locals     Front End Developer     Contract
Oct 2017 - Jul 2019

  • This project was built on ZURB foundation which is consistent with HTML, CSS, Javascript.
  • In this company, we also used Laravel to implement the clients' websites.

Skills used: HTML, Laravel, JavaScript, CSS

Link to the project:
Crowd Genie Finanical Services     Get My Boat     Front End Developer     Employment
Mar 2017 - Feb 2018

  • This project was built on HTML, Javascript, CSS and Core PHP.
  • We met many clients and carried out their requirements into real websites and mobile apps.

Skills used: HTML, PHP, JavaScript, CSS

Link to the project:
FastDev AB     Company Site maintenance     Front End Developer     Internship
Jul 2014 - Dec 2014

  • Learned designing architecture as part of this project. Also maintained the existing company site.
  • The main skills used were HTML, CSS, Javascript, and PHP.

Skills used: HTML, PHP, JavaScript, CSS


Singapore University of Technology and Design    B.Sc  (Computer Engineering)
Apr 2009 - Mar 2014