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Konstantin R.

Offer Konstantin work on your next project.

Ukraine Kyiv, Ukraine
15 hours 32 minutes back
Available for hire available for hire
35 Safes completed
1 arbitration
5 months 16 days back
27 clients
3 proposals made
on the service 4 years
  • jquery
  • flexbox/Grid CSS
  • SCSS/Gulp

Rating

Successful projects
97%
Average rating
9.97 out of 10
Rating
7093
Website Development
75 place out of 2337
Online Stores & E-commerce
65 place out of 1138
12 projects
Web Programming
10 projects
Website Development
8 projects
HTML & CSS
5 projects
PHP

Language proficiency level

Українська Українська: fluent
English English: intermediate

CV

                                   RTS Developers - Reliable Technology Solutions



Welcome to RTS Developers! 

We specialize in creating high-quality websites on WordPress and React.js that help your business grow. Professionalism and innovation are our paths to your success!



Our services:

Today, our team offers a full range of web development services: from domain purchase and design creation to website integration on WordPress/React.js with basic SEO setup and comprehensive ongoing support and maintenance.

We use modern technologies, integrate payment systems, and work with various APIs including Telegram, WhatsApp, Stripe, FlexMLS, and more. Our team also specializes in design development and professional copywriting to ensure your website looks and functions perfectly.



Website development on WordPress and Next.js (React.js framework):

1. E-commerce websites

  • Integration with WooCommerce and setup of user account dashboard
  • Connecting payment systems (Stripe, PayPal, Fondy, Liqpay, Wayforpay, and others)
  • Integration with CRM systems
  • Custom design (on request)
  • Basic SEO setup
  • Shopping cart and checkout integration, user account setup, and email configuration


2. Multipage websites 
3. Multilingual websites 
4. Corporate websites 
5. Business card website 

  • Creation of a stylish and informative representation of your business
  • Integration of Google Maps and contact forms
  • Basic SEO and analytics setup


6. Landing page (one-page website) 

  • Design and development of a compelling one-page layout
  • Integration of lead capture forms and call-to-action elements
  • Basic SEO and performance optimization


7. Blog 

8. News Portals 

9. Portfolio Websites 

10. Booking and Reservation Sites 

11. Educational Platforms and Course Sites (LMS) 

12. Nonprofit and Charitable Sites 

13. Custom Business Websites 

14. WordPress Theme Development 



Advantages of Working with Us:

1. Detailed Technical Specifications: We create thorough technical specifications to ensure every aspect of your project is clearly defined.

2. On-Time Delivery: We adhere to deadlines, ensuring that your project is completed as scheduled.

3. Custom Creative Design: Our designs are tailored to your needs, including animations, imagery, and functional elements, to meet any level of complexity.

4. High-Quality Content: We provide professional copywriting and basic SEO to enhance the quality and effectiveness of your content.

5. Responsive and Cross-Browser Compatibility: Our websites are designed to be fully responsive and compatible with all devices and operating systems (Windows, macOS, Android, iOS).

6. Post-Launch Support: We offer comprehensive support and maintenance after the project is completed to ensure your site runs smoothly.

7. Flexibility and 24/7 Support: We provide flexible solutions and around-the-clock support to meet your needs anytime.



Technologies We Use:

PHP,  WordPress,  React.js,  Next.js,  JavaScript,  SaSS,  jQuery,  CSS3/HTML5,  Git,  GitHub,  Gulp,  Webpack,  Flex-box,  Grid



Project Start:

1. Choosing CMS or Framework: Select between WordPress or Next.js for your project.

2. Technical Specification (TS): Draft a detailed technical specification.

3. Custom Design Development: Create a unique design or work with your existing design.

4. Copywriting: Provide professional copywriting services or work with your pre-existing content.

5. Project Development: Initiate the development phase.

6. Project Management: Continuous project management and regular communication with our team.

7. Testing and Handover: Perform thorough testing and deliver the project.

8. Revisions: Implement necessary revisions free of charge.



Additional Services: 

  • Technical Specification Preparation: Craft a detailed project brief and requirements.
  • Custom Site Design: Create a bespoke site design, including logos, banners, and SEO elements.
  • Site Audit and Testing: Conduct comprehensive site audits and functional testing.
  • Site Migration: Transfer live sites to new hosting or domains.
  • Tilda to WordPress Migration: Migrate sites from Tilda to WordPress.
  • Builder-Based Sites: Develop sites using builders like Elementor PRO.
  • Domain and Server Setup: Purchase domains and configure hosting (shared, VPS, dedicated).
  • SSL Certificate Integration: Acquire and install SSL certificates for secure connections.
  • Post-Launch Support: Provide ongoing support after site launch (discussed individually).
  • Basic SEO Setup: Implement fundamental SEO practices.
  • Payment System Integration: Connect various payment systems (US, Europe, Ukraine).
  • Email Template Design: Create responsive email templates for mass mailing.
  • WordPress Theme Integration: Integrate custom designs into WordPress.
  • Design-Based Development: Work with your design files from Figma, Photoshop, Sketch, Zeplin, Adobe XD, Adobe Illustrator.
  • Google Analytics Setup: Set up and configure Google Analytics for tracking and reporting.

If you need any further details or have specific requirements, feel free to reach out!



About Us:

More of our latest work in the portfolio 

Reviews about our work from clients



Website Warranty:

Before delivering the final result, we conduct a comprehensive inspection of your website based on a detailed checklist derived from the project specifications. If any issues are identified after delivery, we will correct them free of charge. Additionally, we offer ongoing support for your website, which can be discussed and tailored to your specific needs.


Every detail is important to us. Our main goal is to ensure quality and complete customer satisfaction!

Skills and abilities

Programming

Services

Portfolio


  • 800 USD

    Website for Selling Luxury Real Estate in Mexico

    Website Development
    Development of a website for selling luxury real estate in Mexico. The site includes the integration and configuration of the FlexMLS API via the sparkapi platform. Custom filters for the real estate page have been developed. Integration of the Google Maps API has been implemented in conjunction with FlexMLS real estate listings.

    #PHP #WordPress #API #GoogleMap #jQuery #Sass #CSS(.sass) #JavaScript #Flexbox #Flex/Grid
  • 350 USD

    Mobile Site Builder

    HTML & CSS
    Development of layout for a no-code mobile website builder. The layout is responsive (flexible) and cross-browser for all devices, and consists of 6 pages.

    #HTML-layout #HTML/HTML5 #html-design #jquery #Javascript #sass #CSS(.saas)
  • 800 USD

    Car Painting Shop ACC

    Online Stores & E-commerce
    Development of the online store for the brand Auto Chemical Colors (ACC) based on WordPress + Woocommerce. The design of the castomny themes individually under design. The content part of the site is realised on ACF for convenient editing of the content of the site. Connecting the Liqpay Payment System and Delivery through New Mail
  • 900 USD

    TinaValerdi Wedding Dress Shop

    Online Stores & E-commerce
    Internet store for TinaValerdi for the European and U.S. market
    Developing on the basis of an individual subject written under project. Products filtering, payment system connectivity Stripe, PayPal
  • 450 USD

    Website of Kyiv University of Culture

    Website Development
    Website development for the Kyiv University of Culture on the basis of the caston theme + ACF PRO for the content part. The animations of the site are written on a pure javascript individually under the project.
  • 450 USD

    The Wings.Tours tourist website

    Website Development
    Development of tourist travel site on the basis of Elementor PRO
    Additional development of slider modules for multiple use on the site
  • 800 USD

    The Internet store of children's furniture Architoyz

    Online Stores & E-commerce
    Development of the internet store of children's furniture, with a caston functional filtration for the European and U.S. markets - Architoyz
    Products cast filter development, funding payment systems, PayPal, Stripe
  • 900 USD

    The Internet shop of photography

    Website Development
    #Wordpress #woocommerce #elementor #jquery #Javascript #PHP #flexbox #grid #payment #paypal #acf #flexbox #grid #HTML/HTML5 #CSS/CSS3 #Gulp

    Photo shop for PixM
  • 850 USD

    Internet shop of UFM

    Website Development
    #Wordpress #woocommerce #elementor #jquery #Javascript #PHP #flexbox #grid #payment #paypal #acf #HTML/HTML5 #CSS/CSS3 #Gulp

    WordPress CMS for the UFM Mould Manufacturing Company
  • 200 USD

    Online English Language Course Lingo

    Website Development
    #Wordpress #woocommerce #elementor #jquery #Javascript #PHP #flexbox #grid #HTML/HTML5 #CSS/CSS3 #Gulp

    Landing Wire for Lingo (Online English Course)
    WordPress with Elementor and ACF
  • 150 USD

    Landing of the University of Haifa

    Website Development
    #Wordpress #woocommerce #elementor #jquery #Javascript #PHP #jquery #Javascript #PHP #flexbox #grid #HTML/HTML5 #CSS/CSS3 #Gulp
  • 100 USD

    Landing of PC Cards

    Website Development
    #Wordpress #woocommerce #elementor #jquery #Javascript #PHP #jquery #Javascript #PHP #flexbox #grid #HTML/HTML5 #CSS/CSS3 #Gulp
  • 700 USD

    The online store “Fotoprokat24”

    HTML & CSS
    #Wordpress #woocommerce #elementor #jquery #Javascript #PHP #flexbox #grid #HTML/HTML5 #CSS/CSS3 #Gulp

    Online shop for rental and sale of photo-inventory - "Fotoprokat24"

    Adaptive, responsive layer, multi-page internet shop without landing on CMS, indicative periods of 5-7 days, at the cost of $350. Additional possibility to land the site on WordPress and connect the payment of goods.
    Additional costs and deadlines are discussed individually.
  • 100 USD

    Landingpage for Oxorio

    HTML & CSS
    Adaptive, resin, responsive layer for the security service company - "Funiro"
  • Landing page store for car sale MonzaMTS

    HTML & CSS
    Resin, adaptive, resonating landing page line of the car store "MonzaMTS"

Reviews and compliments on completed projects 35

18 December 2025 700 USD
Expansion and finalization of the financial comparator

Quality
Professionalism
Cost
Contactability
Deadlines

Further cooperation proceeds excellently.

1 September 2025 946 USD
STAGE II – Key functionalities of the financial comparator kontomistrz.pl

Quality
Professionalism
Cost
Contactability
Deadlines

Working with Konstantin is a pure pleasure. The website of my financial comparison tool was done professionally and according to expectations. Konstantin makes all the corrections promptly, always responds quickly, and pays attention to every detail. I am very satisfied with the final result – the project meets my requirements both technically and visually. I can wholeheartedly recommend Konstantin to anyone looking for a solid and reliable developer.

6 August 2025 699 USD
Implementation of kontomistrz.pl website – financial comparison tool (WordPress + ACF + Gutenberg)

Quality
Professionalism
Cost
Contactability
Deadlines

Collaboration with Konstantin is very smooth and professional. Excellent contact, quick response to reported corrections, and great involvement in the project. All tasks are carried out according to arrangements, and additionally Konstantin takes the initiative himself, proposing relevant improvements. I definitely recommend – a reliable and trustworthy contractor.

13 July 2025 41 USD
Figma premium

Quality
Professionalism
Cost
Contactability
Deadlines

I highly recommend, the cooperation is professional. That's exactly what I expected

8 July 2025 226 USD
Website development on WordPress

Quality
Professionalism
Cost
Contactability
Deadlines

Thank you, all requirements are met.

Quality
Professionalism
Cost
Contactability
Deadlines

I sincerely recommend Konstantin as a specialist. I will return again. Communication at the highest level. Speed of work and quality are also top-notch

19 May 2025 271 USD
Online store website.

Quality
Professionalism
Cost
Contactability
Deadlines

If you come across Konstantin as a performer, choose without hesitation. He really understands what he's doing and why. He convinced me to do better than I was going to and executed everything very well. The best impression of cooperation.

12 May 2025 361 USD
WordPress website development

Quality
Professionalism
Cost
Contactability
Deadlines

All is good, I recommend for cooperation

25 April 2025 300 USD
Step-by-step execution of the project (Finalization and launch of the website)

Quality
Professionalism
Cost
Contactability
Deadlines

I am very satisfied. The project was completed with high quality and on time. Konstantin demonstrated a high level of professionalism, attention to detail, and a responsible attitude towards the task. Communication was prompt and clear throughout the entire collaboration period. I am completely satisfied with the result. I recommend for collaboration!

Quality
Professionalism
Cost
Contactability
Deadlines

I want to express my gratitude to the performer for the excellent work and high level of professionalism. Always in touch, responsive, adequately and calmly reacts to changes, even if they appear after the tasks have been approved. It is clear that the person is interested in the result — the work is constantly moving forward, there is positive dynamics, despite the long duration of the project.

I especially want to note that the performer does not just create the website — he helps with the implementation of the design, gives recommendations, and makes quality layout. This is strongly felt in the attention to detail and visual design.

The project was completed at the level of a serious agency, not a freelancer — this surprised and pleased me. I am very satisfied with the result and will definitely continue the collaboration. I definitely recommend!

16 April 2025 226 USD
Phased implementation of the project (functional part of the website)

Quality
Professionalism
Cost
Contactability
Deadlines

Thank you for the quality implementation of the functional part of the project. All main modules were implemented according to the task, taking into account the wishes regarding the logic of the website's operation. I liked the communication, the speed of response to edits, and the willingness to flexibly adapt solutions during the development process.

7 April 2025 226 USD
Phased execution of the project (Technical Specification + design)

Quality
Professionalism
Cost
Contactability
Deadlines

I am 100% satisfied with the collaboration. The first stage of the project — design development — was completed with quality, creativity, and taking into account all wishes. Communication was easy and productive.

10 February 2025 226 USD
Make a website

Quality
Professionalism
Cost
Contactability
Deadlines

⭐ Kostyantyn is a true professional! The work was done with quality, on time, and taking into account all wishes. Thank you!

20 January 2025 194 USD
Landing page development

Quality
Professionalism
Cost
Contactability
Deadlines

I am completely satisfied with the collaboration, the work was done efficiently and on time.

16 October 2024 113 USD
Website layout on WordPress

Quality
Professionalism
Cost
Contactability
Deadlines

We contacted Konstantin with a project for developing a landing page (based on a mockup already prepared by our designer) and were very satisfied with the result.
What we would like to highlight the most:
1. Professionalism
Not only the approach to work but also the support with the difficulties we faced even at a basic level due to a lack of knowledge and experience. In areas where we were unsure, Konstantin helped set things up and even explained what was needed and why. Thank you very much for your patience and willingness to explain technical aspects!
2. Speed of work
We were pleasantly surprised by the speed of project execution. The main work was completed in about 5 days, after which a few more days were spent on clarifications and adjustments. As a result, within a week we received a fully functional website, as stated in the initial project discussion.
3. Quality of execution
We already had a page mockup developed in advance, based on which Konstantin developed the site. After minor adjustments, the finished landing page fully matched the mockup. Thus, the quality of work and attention to detail were at the highest level.
4. Flexibility
It is worth noting that he adequately responded to our edits and requests, even if some of them were somewhat picky. Because of this, working with him was comfortable.

So we recommend reaching out to Konstantin as a reliable and qualified developer)
Personally, we are also planning further collaboration on landing page development.

22 November 2023 338 USD
Website with Wordpreess + WooCommerce

Quality
Professionalism
Cost
Contactability
Deadlines

I am pleased with the result, I recommend cooperation!

10 November 2023 271 USD
Developing a website of coupon

Quality
Professionalism
Cost
Contactability
Deadlines

As always, it is wonderful! Thank you !

28 October 2023 16 USD
Listing of pages from Figma to Elementor

Quality
Professionalism
Cost
Contactability
Deadlines

Constantine has done the task well. We work further

Quality
Professionalism
Cost
Contactability
Deadlines

Thank you ! Everything is done properly and timely. Pleasant and easy communication.

22 October 2023 232 USD
Create a simple blog in WordPress

Quality
Professionalism
Cost
Contactability
Deadlines

The work with Constantine was at the highest level.
Pleasant communication, Constantine was available at any time. All amendments have been corrected and the wishes have been taken into account.
The project came out as it was thought.
If there is a need for help again with the creation of websites, I will contact Constantine.

18 October 2023 147 USD
4 Sites on Vodafone

Quality
Professionalism
Cost
Contactability
Deadlines

Well, we’re not working for the first time.

Quality
Professionalism
Cost
Contactability
Deadlines

Some moments that were not provided in the design - were corrected for free, operational output to the contact, in principle loyal people. If there is a mistake, it can be corrected without any questions.

2 October 2023 180 USD
Create 5 WordPress-based websites

Quality
Professionalism
Cost
Contactability
Deadlines

Everything is great. We work further

1 September 2023 338 USD
Internet shop for women’s clothes

Quality
Professionalism
Cost
Contactability
Deadlines

Constantine studied all the wishes on the project and quickly bring the project to the desired result.
Thank you for your attention and excellent communication! I’m sure I’m going to deal with new projects!

Profile deleted | Safe Safe | Response review

19 August 2023 68 USD
Create a Casino Offer on WordPress

Quality
Professionalism
Cost
Contactability
Deadlines

Excellent adequate specialist, quickly and qualitatively done the work, with the appearance of doping. Working moments quickly resolved questions. I recommend it as a reliable skilled specialist.

10 August 2023 90 USD
Correction of the website to WordPress

Quality
Professionalism
Cost
Contactability
Deadlines

Thank you for work! A very sensitive and communicative specialist. I am satisfied with cooperation.

21 July 2023 406 USD
Website development + integration with strike

Quality
Professionalism
Cost
Contactability
Deadlines

The performers are pleased and will continue to work together!

26 June 2023 180 USD
Enter changes to design + add new fields to the page

Quality
Professionalism
Cost
Contactability
Deadlines

The work is done according to the

E Kh | Personal | Response review

21 June 2023 113 USD
Сайт НЕ з нуля WP

Quality
Professionalism
Cost
Contactability
Deadlines

Everything that was placed before the executive was done.

3 June 2023 338 USD
Создание сайта

Quality
Professionalism
Cost
Contactability
Deadlines

Fully satisfied with the work, all the conditions are fulfilled quality and without delay!

23 May 2023 141 USD
Turn the interior page to the wordpress in the image design

Quality
Professionalism
Cost
Contactability
Deadlines

Constantine was responsible and fulfilled every task by the project. Always in contact. I will continue the collaboration.

Quality
Professionalism
Cost
Contactability
Deadlines

performed greatly. Designed in Figma. All directions were taken into account. Always in contact. Thank you greatly.

4 May 2023 180 USD
Regional news website

Quality
Professionalism
Cost
Contactability
Deadlines

Everything is great, the execution is responsible for the work. We will work further!

Profile deleted | Safe Safe | Response review

16 April 2023 90 USD
Creating a landing page

Quality
Professionalism
Cost
Contactability
Deadlines

The work was done quickly, I recommend the work!

27 December 2022 90 USD
Landing for the sale of generators

Quality
Professionalism
Cost
Contactability
Deadlines

Everything at a higher level! It was done in time, as it was.

Activity

  Latest proposals 10
WordPress site for manufacturing services: SEO, applications, portfolio, cost estimation
609 USD
Refinement of the website on WP
226 USD
Italy Ally infrastructure solution Personal project
226 USD
Mass mailing Instagram Personal project
226 USD
Integration of funds Personal project
16 USD
Expansion and finalization of the financial comparator Personal project
700 USD
Create 3 landing pages for a product
271 USD
Page layout on ACF according to the design
180 USD
Development of a template on WordPress
609 USD
Work on creating the Lady Dance website
426 USD