Serhii Zasadinsky
Private message 
Offer work 
Rovno,
Ukraine
available for hire
Rating
Language proficiency level
Українська: fluent
Skills and abilities
Programming
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Bot Development
from 15 USD for hour
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Data Parsing
from 15 USD for hour
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Databases & SQL
from 15 USD for hour
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HTML & CSS
from 15 USD for hour
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Javascript and Typescript
from 15 USD for hour
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PHP
from 15 USD for hour
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Web Programming
from 15 USD for hour
Services
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Website Development
from 15 USD for hour
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Website Maintenance
from 15 USD for hour
Portfolio
- All works 10
- PHP 1
- Javascript and Typescript 1
- Website Development 1
- HTML & CSS 3
- Email Marketing 1
- Bot Development 2
- Cryptocurrency & Blockchain 1
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Telegram bot OracleBet
Bot Development
Development of a Telegram bot that makes quality predictions for matches using an AI agent. Also includes balance top-up and purchase of predictions using Stars. Welcome bonuses, transaction history, referral system with rewards. Multilingual support and many other features in one Telegram Mini App.
#Telegram #miniapp #telegram-bots #telegram-bots
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Profit field
HTML & CSS
It is #LendingPage. I used #Sass/SCSS and #compass. Added to interesting #css-animation
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Quazom - Supplement to the Electric Self-States
HTML & CSS
Created and animated #LendingPage with the sale app for electric car rental from the #quazom studio
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Match forecast sales + Blockchain
Cryptocurrency & Blockchain
Front: It is upward. It is on #React. Connected to #i18n.
Backlink: #nodejs (#api), #MySQL, #JWT authorization, #blockchain (for each user), purchase forecasts for BTC, internal messages (admin -> user) and much more
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The Lets.trade
Website Development
It is #LendingPage. It was posted on #NextJS. Created #api on #PHP7 admin on #ReactJS from which you can fully manage all the content of the pages on the site
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CRM system
PHP
The system is provided:
Role system (administrator and employee)
- Creation of staff requests for the performance of repairs and replacement of equipment on the technician
Monitoring of the status of the application
… Admission to Applications (Administrator)
- Commenting on applications (which was modified, what needs to be done, etc.) The Administrator)
- Possibility to indicate serial numbers of details which were removed and replaced by new (Administrator)
- The ability to create, edit and remove standards and standards to ensure quality work
History Visited by CRM employees
Addition, editing and removal of equipment from the warehouse
and Dr.
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Designers Selection of Carpet in the Car
Javascript and Typescript
Constructor for the selection of car coatings.
Implemented on Native JavaScript
Step 1 (Determined brand of the car):
… Automatic removal of existing brand cars
- List of car models depending on the selected brand
- The list of the years of the production of the car depending on which brand and brand was chosen
Step 2 (Select the color and structure of the carpet):
Choosing the main color of the material
Choose the color of the coat.
Choosing the structure of the carpet (cent or ruby)
When choosing the meaning changes the color, cover and structure of the carpet on the picture.
Step 3 (the selection of the set):
- When selecting the set occurs the automatic replacement of the image for the corresponding set
Additional accessories to the basket.
- the possibility to obtain a discount when selecting certain sets (for obtaining you need to fill the questionnaire)
Step 4 :
The user leaves his contact details.
Formed data at the end are sent to the server for further work with the client.
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Landing for EVACAR
HTML & CSS
A valid and cross-browser line of landing has been implemented.
Google PageSpeed Insights:
Mobile Device 92/100
The Desk 98/100
… Adapted under screen extensions from 320px to 1920px.
The optimization of the image is done.
Also implemented timer, carousel and download video only when it is included by means of native JavaScript
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e-mail letter
Email Marketing
Adaptive E-mail Letter
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The Viber Online Store
Bot Development
Full-value online store in Viber
can be:
Choose the category of goods.
… Showing available goods in the form of carousel
Keep the goods in the basket.
Remove goods from the basket.
- specifies the delivery address and payment method
- keep orders in the base and display them in the admin
by admin:
Supply of Goods (Editing)
Working with orders
The message is notified to all subscribers.
sending a message to a specific person.
and a lot more
Reviews and compliments on completed projects 31
27 February
23 USD
Restoration of the landing site on the hosting (upload files from ZIP)
Everything was great, the task was completed with quality and in full. Good communication, the performer is always in touch and responds quickly. I plan to continue collaborating and recommend.
24 September 2025
90 USD
Creation of Telegram Mini App
Everything is fine, we are moving on to a new stage.
27 June 2025
90 USD
Creating Telegram Mini App
All right, we will launch the project
14 June 2025
483 USD
Creating Telegram Mini App
All is well, we proceed to the final settings and release the project
4 June 2025
451 USD
Creating Telegram Mini App
Everything is done qualitatively, clearly, and promptly. We are moving on to cooperation within the framework of the second stage of the project
15 February 2023
902 USD
Creating Telegram Bot + Web App (in)
If you are looking for a person who is really always in a relationship that understands you, offers your ideas, wants to do the way you should, you can contact such bright people as Sergey. And it’s not just words. This is what was supported by actions. Thank you to our people!
8 January 2023
361 USD
Backend (Laravel) B1
Great is!
Careful and experienced master at Vue+Lara
14 December 2022
113 USD
Desktop and mobile version, no engine, css + javascript
I am pleased with the cooperation and I am planning to continue cooperation. I recommend it.
8 January 2022
113 USD
Adaptive Landing Service
We are pleased to cooperate with Sergey!
A skilled expert, a reputable executive.
The work has been completed in time and I hope for further joint projects.
I recommend !
8 September 2021
485 USD
Covers a 3-page site on some popular and fast engine
Very pleased with collaboration, a pleasant person and a real professional of your business.
Everything is quality, in time and at the highest level.
I definitely recommend as one of the top web coders here.
11 July 2021
15 USD
Доработка адаптивной html-верстки сайта
Задачи выполнены. Рекомендую сотрудничество с Сергеем!
5 July 2021
14 USD
Доработка лендинга (ЛО)
Задача выполнена качественно и в срок. Все точно по ТЗ. Сергей всегда на связи, сразу отвечает на все вопросы и вносит нужные правки.
2 July 2021
37 USD
Adaptive page wraping on finished prototypes from figma
Sergey him very much, and I am so grateful for it! Everything was done in time.
| Response review
29 June 2021
34 USD
Improvement of the system in PHP
It is very pleasant when a specialist not only performs his work, but also predicts the possible development or errors that may occur in non-standard situations. Sergey is one of those specialists and has proven himself from the best side.
29 June 2021
36 USD
The perfectionist for the perfectionist
The work is done in accordance with TZ
| Response review
28 June 2021
23 USD
Improve the self-writing service engine on PHP Laravel.
Everything was OK
The man knows his work.
pleased
6 May 2021
186 USD
Website by Figma Prototype
Thank you for the quality and fast work. Sergey has done the task well. We will continue to cooperate!
25 December 2020
17 USD
Создание Формы номер раз и доделки
Проект выполнен в наилучшем качестве. С кучей мелких доработок, которые возникли в процессе выполнения.
Сергей проявил себя как легко все понимающий, быстро делающий и без лишнего кода.
Обязательно обращусь ещё.
21 December 2020
13 USD
Creating forms with a calculator
The work is performed quality. When he explained the task, he quickly understood everything, proposed his solution. satisfied with work.
I’ll talk again in the future.
| Response review
23 November 2020
34 USD
Re-design and upgrading of the website in PHP
A good specialist with the necessary experience to solve various tasks. Everything is done qualityly. I will be happy to continue working on the next stages. Thank you !
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14 October 2020
29 USD
Creating a dynamic web page with UI Document Catalog
It’s nice to work with Sergey.
1 . Even when familiar with the project, Sergey gave a professional assessment of the TZ and immediately briefly explained how the project will be done. It gives you the certainty that you have a job with a professional.
2nd He asked literally clarificing questions. Such questions to identify inaccuracies and errors in the TZ.
Three Without any excessive considerations, he made corrections and changes.
4 . The work was delivered in time and in full.
I recommend Sergey as a professional specialist.
I'm going to talk to him for such projects.
18 August 2020
90 USD
Crm для рассылки
Спасибо, очень приятно работать, будем сотрудничать дальше
31 July 2020
23 USD
Дополнительные правки по лендингам
Правки выполнены!Спасибо, все на высшем уровне! Работаем дальше))
29 July 2020
11 USD
Чатбот viber
Выполнено раньше оговорённого срока, всё чётко по ТЗ, Спасибо, буду обращаться ещё
9 July 2020
113 USD
PHP 7 pages
I thank Sergey for the work done, the loyalty to my request outside the agreed TZ and the high quality of the work done! I have been working with freelancers for a long time and have long not met such a level of performance. Sergey very clearly explains the nuances of performing the task and gives the right recommendations that I missed. I’m preparing to continue work with Sergey, from now on I’m your permanent customer.
| Response review
18 June 2020
11 USD
Webasyst - turn the pop-up window
You can work.
18 June 2020
18 USD
Верстка одной странички
Спасибо большое, Сергей, за работу. Работа сделана действительно качественно! Это то что мне нужно было. Pixel Perfect просто на высоте!
2 May 2020
45 USD
Development of an electronic journal for the university (disertation)
Very pleased with the result! The freelancer has done the job earlier. Constantly in communication, always available and fully clarifies all the moments during the course of the task. Everything is clear and accessible, even for those who don’t really understand it. A lot of thanks!
24 April 2020
113 USD
The CRM system
satisfied with the result. The freelancer has done the work in time. He was always in contact and answered all questions competently and kindly.
| Response review
2 June 2019
3 USD
Модальное окно JS
Сергей отлично справился с работой! На выходе получился на 100% рабочее и красиво оформленное модальное окно с необходимой информацией для пользователя. Кроме того, абсолютно корректно отрабатывает алгоритм появления модального окна! Однозначно рекомендую Сергея к сотрудничеству!!
28 May 2019
3 USD
Сделать красивую всплывающую форму
Отличная, качественная и скрупулезная работа! Рекомендую Сергея к сотрудничеству!!
Activity
| Latest proposals 10 | Budget | Added | Deadlines | Proposal | |
|---|---|---|---|---|---|
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Bot for parsing and posting
451 USD
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Website with AI integration
451 USD
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Supplier price aggregator (Prom + marketplaces)
113 USD
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Telegram bot + Google Sheets + Nova Poshta + Telegram chat + auto-confirmation
226 USD
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Create a landing page using html+css+javascript
349 USD
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Development of a bot/program for automatic news publication in Telegram
113 USD
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Product parsing
226 USD
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Development of a Telegram bot with a mini-app
451 USD
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Refinement of the web panel for chatbots
68 USD
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SaaS development Web + Mobile
23 USD
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