Switch to English?
Yes
Переключитись на українську?
Так
Переключиться на русскую?
Да
Przełączyć się na polską?
Tak
  1. Freelancers

Kostyantin Kravchenko

Offer Kostyantin work on your next project.

Ukraine Odessa, Ukraine
10 hours 2 minutes back
A little busy a little busy
5 Safes completed
2 years back
5 clients
2 proposals made
on the service 9 years
Client profile
Freelancer Kostyantin K. — Ukraine, Odessa. Core skill — Javascript and Typescript

Rating

Successful projects
83%
Average rating
No data
Rating
736
Javascript and Typescript
164 place out of 3455
4 projects
Web Programming
2 projects
PHP
2 projects
Javascript and Typescript
1 project
HTML & CSS

Language proficiency level

Українська Українська: fluent
Русский Русский: fluent
English English: pre-intermediate

CV

I am a Middle Full-stack developer with over 4 years of experience, specializing in building scalable web applications and microservices using Node.js (Express.js), React.js, Next.js, Angular, PHP, and Golang. My career includes leading development teams, enhancing internal business systems, and delivering freelance projects. For many years, I worked on improving and supporting enterprise computer systems and handling DevOps tasks.

 

At Profit Center FX, I focus on optimizing internal platforms using React.js and robust PHP solutions. Previously, I led the development of the ipopo.ua and ipopokids.ua websites, built e-commerce platforms, and implemented projects on OpenCart, Shopify, and custom stacks.

 

I enjoy learning new technologies (currently exploring Java), automating processes, and solving complex problems with elegant code. My approach combines technical expertise with teamwork, enabling me to exceed project expectations.

 

I am eager to collaborate with forward-thinking teams and organizations where I can contribute, learn, and grow.

 

My English level is A2, but I am actively improving my English skills to better collaborate with international teams.

Skills and abilities

Programming

Design & art

Services


Architecture

Administration

Writing

Portfolio


Reviews and compliments on completed projects 5 1

2 May 2024 113 USD
Marketing agency website

Quality
Professionalism
Cost
Contactability
Deadlines

Constantine completed part of the work (15%), but then asked to close the project due to personal circumstances. The quality of the work already done is not bad, communication was not established immediately, but later it improved. Deadlines: Constantine estimated the work to be completed in 7 days (in my opinion, underestimated), but asked to close the project a few hours before the end.

Karina T. | Safe Safe

12 November 2023 68 USD
2 pages on the application reaction.

Quality
Professionalism
Cost
Contactability
Deadlines

Everything was done according to TZ, it was rewarding.

Igor D. | Safe Safe | Response review

28 September 2023 113 USD
There is a Figma, with a website re-design, you need to press on the REACT project

Quality
Professionalism
Cost
Contactability
Deadlines

Everything is good, fast, thank you for work.

Polymer Jhonsos | Safe Safe | Response review

9 June 2023 162 USD
Implementation of the project tasks

Quality
Professionalism
Cost
Contactability
Deadlines

Thank you for the quality implementation of the tasks! We continue on!

Ruslan V. | Personal | Response review

6 June 2023 41 USD
OpenCart: натяжка готовой верстки + функционал

Quality
Professionalism
Cost
Contactability
Deadlines

Thank you for work, all on the TZ, pleasant work and fast communication. Ready to cooperate further!

Ruslan V. | Personal | Response review

29 July 2022 23 USD
Adding individual prices to the product characteristics of Opencart

Quality
Professionalism
Cost
Contactability
Deadlines

Operational solution of the issue. Everything was done as well and quickly as possible. I recommend cooperation

Maksim Mesh | Safe Safe | Response review

Activity

  Latest proposals 10
Improvement of the existing Next.js/Supabase project: offers, CRM, analytics, AI chat
23 USD
React / Next.js Developer for Existing Platform(Remote)
12 000 USD
Optimization of the NextJS site (SSR)
9999 USD
Booking System - FE Software Developer
2751 USD
Full-Stack Engineers Next.js 15 · React 19 · Prisma · Stripe
4000 USD
React edits
226 USD
Creating an online store
609 USD
Make changes in the front-end code of the website (React, Next.)
16 USD
Need a React + TypeScript developer to improve the AI agent
1000 USD
CRM on React or Angular
564 USD