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Sergey K.

Information Portfolio 30 Reviews 597 Activity

Profile

Sergey K.
  • Sergey K.
  • Kyiv, Ukraine
  • 594 2
  • Available for hire
  • Projects 481
  • Rating 5.0
  • Rating 17 008
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Indicators

  • Last project: 2 months back
  • Contest wins: 1
  • Collaboration with clients: 395
  • Last visit: 11 days 11 hours ago

Specializations

Web Programming

48 place/6602
251 projects completed

PHP

31 place/1669
80 projects completed

Tags

mongodb jquery TecDoc web developer API Integration seo wordpress OpenCart

Skills and abilities

Programming

  • Web Programming
  • PHP
  • C & C++
  • C#
  • Content Management Systems
  • Data Parsing
  • Databases & SQL
  • HTML & CSS
  • Java
  • Javascript and Typescript
  • Python

Services

  • AI Consulting
  • Content Management
  • Customer Support
  • Cybersecurity & Data Protection
  • Data Processing
  • Enterprise Resource Planning (ERP)
  • Information Gathering
  • Online Stores & E-commerce
  • Payment Systems Integration
  • Tuition
  • Website Development
  • Website Maintenance

Promotion

  • Contextual Advertising
  • Email Marketing
  • Lead Generation & Sales
  • Link Building
  • Marketing Research
  • Search Engine Optimization (SEO)
  • Search Engine Reputation Management (SERM)
  • Social Media Advertising
  • Social Media Marketing (SMM)
  • Teaser Advertisements
  • Website SEO Audit

Administration

  • DevOps
  • Linux & Unix
  • Software & Server Configuration
  • System & Network Administration
  • Windows

Portfolio Works

Creating a website under the key
56 USD
5 914
Creating a website under the key
Website Development
Creating a website under the key
Creating a website under the key
56 USD
3 1 303
Creating a website under the key
Website Development
Creation of a website by the client's designs
Creation of site
51 USD
6 1 594
Creation of site
Website Development
Creating a website + filling
Creation of a personal website
2 1 410
Creation of a personal website
Website Development
Creation of a personal website
Creating a website for the furniture factory
178 USD
5 805
Creating a website for the furniture factory
Website Development
Creating a website under the key C
Creating a website under the key
67 USD
3 688
Creating a website under the key
Website Development
Creating a website under the key
Promotion of a young website
67 USD
7 1 718
Promotion of a young website
Search Engine Optimization (SEO)
They came to the top on a number of requests. With the minimum budget for the entire project, namely 1000 grn/month reached from 0 to 500 per day in 3 months.
Creating a website under the key
45 USD
1 723
Creating a website under the key
Website Development
Creating a website according to the customer’s recommendations and requirements
Translation of site
33 USD
3 635
Translation of site
Website Development
The work was carried out under clear control and instructions of the customer.
Development of the site at the key
51 USD
2 634
Development of the site at the key
Website Development
Create a website with clear instructions and instructions of the customer.
Key site for the US/Europe market
100 USD
0 690
Key site for the US/Europe market
Website Development
Create a website under clear customer control. All ideas and directions have been implemented.
Online shop of erotic clothes
45 USD
5 821
Online shop of erotic clothes
Website Development
Flat work with the customer
Refreshment of Furniture Factory
156 USD
0 561
Refreshment of Furniture Factory
Website Development
Development of functionality according to the model Optimization for all devices A clear robot according to the task
Site of a comfortable cafe bar in the city centre
33 USD
3 705
Site of a comfortable cafe bar in the city centre
Website Development
A key site for a small cafeteria.
Transportation of goods vantagbus.in.ua
33 USD
3 542
Transportation of goods vantagbus.in.ua
Website Development
according to the plan and model of the customer
The online store of car parts
111 USD
2 698
The online store of car parts
Website Development
Opencart + TECDOC Adaptive Design
broad format printing
45 USD
4 575
broad format printing
Website Development
The corporate leading The unique design
Company of cargo transport
33 USD
2 429
Company of cargo transport
Website Development
Website of the company Adaptive Design Facility and Availability
Company of passenger transport
33 USD
4 513
Company of passenger transport
Website Development
The corporate website
Water Service Company
33 USD
4 410
Water Service Company
Website Development
The corporate website by the client's model
Factory of soft furniture dls.ua
500 USD
2 419
Factory of soft furniture dls.ua
Website Development
Design website of corporate level crm system, 1c charging, multi-level statistics, etc.
Store door and window
80 USD
3 399
Store door and window
Website Development
Development of the Macket Supporting Preparation of modules
Manufacturer of Perry Schemes Prokopets
80 USD
2 396
Manufacturer of Perry Schemes Prokopets
Website Development
Creation of dop modules Internal Accounting of Order accompanying
School of Education via Skype
33 USD
3 411
School of Education via Skype
Website Development
Work on the Macket
Site portfolio\block\service
33 USD
3 392
Site portfolio\block\service
Website Development
Site portfolio\block\service
Semantic core for site construction theme
11 USD
0 298
Semantic core for site construction theme
Search Engine Optimization (SEO)
Created a short semantic core without classification Also added a form of work for the copywriter
Optimization and direction of the old site
11 USD
0 1 155
Optimization and direction of the old site
Search Engine Optimization (SEO)
from 5 to 100 per day per month on the old site Removed all duplicates of pages. Correction of code errors Correction of robots.txt and site map Basic optimization is done.
The semantic core
7 USD
0 84
The semantic core
Search Engine Optimization (SEO)
The core of requests for the Internet store of filters
11 USD
0 67
The core of requests for the Internet store of filters
Search Engine Optimization (SEO)
The core was formed by the customer list.
Short review of justsmtp.ru
7 USD
0 102
Short review of justsmtp.ru
Website SEO Audit
Short review of justsmtp.ru + Explanation that is wrong Explanations that need to be corrected + Plan of work

Client reviews

Extension of the security certificate
Personal 16 USD
Quickly and efficiently, the labor safety certificate is in place, I resolved all issues with hosting support myself. Thank you very much for your help. Good work. Respectfully

5.0

Sergey K.

Sergey K.
12 May
Launch of add-ons
Personal 388 USD
Excellent.

Thank you.

Excellent.

Thank you.

5.0

Sergey K.

Sergey K.
28 April
Need to remove the price rounding for the merchant feed.
16 USD
As always, completed promptly and on time. There was a delay on our side in providing feedback. I recommend for collaboration!

5.0

Sergey K.

Sergey K.
27 March
Launch of add-ons
Personal 194 USD
Thank you. We continue.
Thank you. We continue.

5.0

Sergey K.

Sergey K.
5 March
Launch of add-ons
Personal 251 USD
Thank you.
Quickly and efficiently.

5.0

Sergey K.

Sergey K.
7 January
Finalization
Personal 217 USD
Thank you. Everything is done on time.

5.0

Sergey K.

Sergey K.
3 December 2025
Transfer of products from Wordpress\Woocommerce to Opencart 3
45 USD
A good specialist, did everything quickly and efficiently.

5.0

Sergey K.

Sergey K.
29 November 2025
Transfer of the website from one hosting to another
Personal 34 USD
Everything as always, thank you!!!!!!!!!!!!!!!

5.0

Sergey K.

Sergey K.
28 November 2025
Transfer of the website from one hosting to another
34 USD
Everything is excellent as always 10 out of 10

5.0

Sergey K.

Sergey K.
25 November 2025
OpenCart: refinement of the feed for Merchant Center (selection of products from the admin panel)
Personal 22 USD
Everything is great as always) I recommend

5.0

Sergey K.

Sergey K.
24 November 2025
Redesigning websites on Opencart
Personal 145 USD
As always, on time and promptly! The task was completed quickly, taking into account all needs. The task was difficult. I recommend for collaboration.

5.0

Sergey K.

Sergey K.
14 November 2025
OpenCart: refinement of the feed for Merchant Center (selection of products from the admin panel)
Personal 22 USD
The order was completed excellently. The feed works stably, products are loaded without errors. I recommend the performer.

5.0

Sergey K.

Sergey K.
14 November 2025
Improvements
Personal 56 USD
thank you, we work on a permanent basis very responsible person and well done work

5.0

Sergey K.

Sergey K.
5 November 2025
OpenCart: cleaning photos attached to the product card (without searching through all folders)
Personal 22 USD
It is very pleasant to collaborate! The performer is attentive to details, understood the OpenCart code without unnecessary questions. Everything is implemented neatly, clearly, and quickly. I definitely recommend as a responsible specialist!

5.0

Sergey K.

Sergey K.
4 November 2025
Transfer of the OpenCart website from one hosting to another
33 USD
everything is clear maximum help and information

5.0

Sergey K.

Sergey K.
1 November 2025
Refinement
160 USD
Thank you as always. Everything is quick.

5.0

Sergey K.

Sergey K.
23 October 2025
Remove the popup window
Personal 22 USD
Everything is fine, as always. I recommend for collaboration.

5.0

Sergey K.

Sergey K.
20 October 2025
Opencart site unpacking domain license
33 USD
Everything turned out as always, thank you.

5.0

Sergey K.

Sergey K.
18 October 2025
Make a copy of the website for the Ukrainian market + improvements
Personal 267 USD
everything is done and even more
let's move on

5.0

Sergey K.

Sergey K.
14 October 2025
Opencart site unpacking domain license
33 USD
The best freelancer of all who has been here, competence in OpenCart 100000% all without unnecessary questions, LEVEL

5.0

Sergey K.

Sergey K.
12 October 2025

Indicators

Total projects:
481
Successful projects 99.7% 0 arbitrations
Average rating:
5.0
596 reviews
5.0
Professionalism
5.0
Quality
5.0
Price
5.0
Contactability
5.0
Deadlines

Activity

Latest proposals 10
Project
 Type Budget Proposal Deadline Added
Move the button to the top of the page on the WordPress site
25 USD
22 USD
1 day 11 May
Extension of the security certificate
16 USD
16 USD
7 days 11 May
OpenCart edits
Not specified
22 USD
1 day 10 May
Launch of add-ons
388 USD
388 USD
7 days 24 Apr
Transfer of databases from server to server
178 USD
178 USD
3 days 5 Mar
Launch of add-ons
194 USD
194 USD
7 days 3 Mar
Support
30 USD
30 USD
7 days 3 Mar
Installation of the module and adding the section "Public Offer Agreement" to the website.
Not specified
Not specified
7 days 18 Feb
Need to remove the price rounding for the merchant feed.
16 USD
16 USD
1 day 30 Jan
Training on creating a Marketplace
Not specified
Not specified
7 days 23 Jan
Перемістини кнопку наверх сторінки на сайті WordPress
Status Project complete
Type Public project
Budget 25 USD
Proposal 22 USD
Deadline 1 day
Added 11 May
Продление сертификата безопасности
Status Project complete
Type Personal project
Budget 16 USD
Proposal 16 USD
Deadline 7 days
Added 11 May
Правки опенкарта
Status Closed without completion
Type Public project
Budget Not specified
Proposal 22 USD
Deadline 1 day
Added 10 May
Запуск дополнений
Status Project complete
Type Personal project
Budget 388 USD
Proposal 388 USD
Deadline 7 days
Added 24 April
Перенос баз з серверу на сервер
Status Project complete
Type Public project
Budget 178 USD
Proposal 178 USD
Deadline 3 days
Added 5 March
Запуск дополнений
Status Project complete
Type Personal project
Budget 194 USD
Proposal 194 USD
Deadline 7 days
Added 3 March
Поддержка
Status Closed without completion
Type Personal project
Budget 30 USD
Proposal 30 USD
Deadline 7 days
Added 3 March
Встановлення модуля та додавання розділу "Договір публічної оферти" на сайт.
Status Closed without completion
Type Personal project
Budget Not specified
Proposal Not specified
Deadline 7 days
Added 18 February
Треба прибрати окгурлення ціни для фіда merchant
Status Project complete
Type Public project
Budget 16 USD
Proposal 16 USD
Deadline 1 day
Added 30 January
Навчання по створенню Marketplace
Status Suspended by administration
Type Personal project
Budget Not specified
Proposal Not specified
Deadline 7 days
Added 23 January

Profile

Sergey K.
  • Sergey K.
  • Kyiv, Ukraine
  • 594 2
  • Available for hire
  • Projects 481
  • Rating 5.0
  • Rating 17 008
Want to offer Sergey K. a job?
Register

If you have an account, log in

Indicators

  • Last project: 2 months back
  • Contest wins: 1
  • Collaboration with clients: 395
  • Last visit: 11 days 11 hours ago

Language proficiency level

  • Українська: Fluent
  • Русский: Fluent
  • English: Advanced
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  • Русский
  • Polski
  • Deutsch
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