Sergey J
The star rating is a representation of the overall rating, calculated as the mean of the client satisfaction rating, the average client interview rating, and internal interview scores.
The client satisfaction rating is the weighted average of client ratings, with weights based on reviewed work hours. When no client rating exists, the approval fraction (approved vs. reviewed work hours) determines it.
If the client satisfaction rating exceeds the overall rating, it becomes the star rating. In the absence of client ratings, if the average client interview rating is higher than the overall rating, it becomes the star rating. If no data is available, the star rating defaults to the internal interview score.
The client satisfaction rating is the weighted average of client ratings, with weights based on reviewed work hours. When no client rating exists, the approval fraction (approved vs. reviewed work hours) determines it.
If the client satisfaction rating exceeds the overall rating, it becomes the star rating. In the absence of client ratings, if the average client interview rating is higher than the overall rating, it becomes the star rating. If no data is available, the star rating defaults to the internal interview score.
FullStack Developer Preferred Title
$50.00 /hr $ 70.0K /yr Hourly Rate and Yearly Salary
Overview
Basic Summary
LD Talent History - Average Count of Messages/Day 0.6
- Project Completion Rate 2/4
- Interview Acceptance Rate 4/6
- Timezone Overlap 44h PST, 65h UTC
- Software Engineering Process 4.0/5
- Design Practice 3.0/5
- Design Theory 3.0/5
- Technical Breadth 4.0/5
- Logical Thinking 4.0/5
- Technical Strength 4.0/5
- System Design 3.0/5
- Productivity and Responsiveness 3.0/5
- Teamwork 3.0/5
- Agile Development Process 3.0/5
- Intellectual Merit 4.0/5
- English Communication 3.0/5
- Documentation 3.0/5
- Desktop Windows
- Phone Android
- Member Since May 03, 2022
- Profile Last Updated Nov 08, 2022
- Last Activity Nov. 30, 2022, 4:29 p.m. UTC
- Location Bulgaria
Profile Summary
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
Total Experience: 11 years
React (3E, 7Y)
3 experiences, across 7 yearsRedux (5Y)
5 years of experienceBlockchain (5Y)
5 years of experienceNextJS (2E, 5Y)
2 experiences, across 5 yearsSolidity (5Y)
5 years of experienceCSS (4E, 5Y)
4 experiences, across 5 yearsLaravel (2E, 5Y)
2 experiences, across 5 yearsNodejs (2E, 4Y)
2 experiences, across 4 yearsPHP (3E, 5Y)
3 experiences, across 5 yearsMongoDB (4Y)
4 years of experienceReact native (4Y)
4 years of experienceExpressJS (4Y)
4 years of experienceHTML (3E, 4Y)
3 experiences, across 4 yearsJavaScript (3E, 4Y)
3 experiences, across 4 yearsMySQL (2E, 4Y)
2 experiences, across 4 yearsWordpress (3Y)
3 years of experienceMaterial Design (2Y)
2 years of experienceIonic (2Y)
2 years of experience
Weekly Availability
Timezone Overlap with 06 - 21 per Week: 44h PST, 65h UTC
Day
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
UTC
16 - 24
09 - 19
09 - 19
09 - 19
09 - 19
09 - 19
09 - 19
PST
09 - 17
02 - 12
02 - 12
02 - 12
02 - 12
02 - 12
02 - 12
Vetting
- Interview Data
- Software Engineering Process
- Design Practice
- Design Theory
- Technical Breadth
- Logical Thinking
- Technical Strength
- System Design
- Productivity and Responsiveness
- Teamwork
- Agile Development Process
- Intellectual Merit
- English Communication
- Documentation
Experience
Full Stack Developer
Employment
May 2020 - Present
Self Employed Company
Technology Industry
Project: CryptiSwap
- 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.
Full Stack Developer
Contract
Nov 2020 - Aug 2021
Smart Cities Transport Company
Technology Industry
Project: SneakQik
- 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.
Full Stack Developer
Contract
Jun 2018 - May 2021
Teamvate Company
Technology Industry
- 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.
Full Stack Developer
Employment
Oct 2018 - Apr 2020
CBX Software Company
Project: JockGod
- 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.
Front End Developer
Contract
Oct 2017 - Jul 2019
B.V Company
Technology Industry
Project: Tour Wiith Locals
- 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.
Front End Developer
Employment
Mar 2017 - Feb 2018
Crowd Genie Finanical Services Company
Technology Industry
Project: Get My Boat
- 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.
Front End Developer
Internship
Jul 2014 - Dec 2014
FastDev AB Company
Technology Industry
Project: Company Site maintenance
- Learned designing architecture as part of this project. Also maintained the existing company site.
- The main skills used were HTML, CSS, Javascript, and PHP.
Qualifications
Education
Singapore University of Technology and Design
Apr 2009 - Mar 2014
B.Sc (Computer Engineering)