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Sergey Ivanov

Information Portfolio 2 Reviews 36 Activity

Profile

Sergey Ivanov
  • Sergey Ivanov
  • Kyiv, Ukraine
  • 36 0
  • Available for hire
  • Projects 37
  • Rating -
  • Rating 2 751
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Indicators

  • Last project: 1 year back
  • Collaboration with clients: 29
  • Projects involving arbitration: 1

Specializations

Cryptocurrency & Blockchain

8 place/418
15 projects completed

Embedded Systems & Microcontrollers

84 place/191

Tags

delphi mac os pascal objective c golang C/CPP ethereum Solidity
swift

Skills and abilities

Programming

  • Cryptocurrency & Blockchain
  • Embedded Systems & Microcontrollers
  • AI & Machine Learning
  • C & C++
  • C#
  • Content Management Systems
  • Databases & SQL
  • Desktop Apps
  • Java
  • Javascript and Typescript
  • PHP
  • Python

Services

  • Cybersecurity & Data Protection
  • Data Processing
  • Online Stores & E-commerce
  • Payment Systems Integration

Mobile development

  • Apps for iOS (iPhone and iPad)

Administration

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

Portfolio Works

Advertising Management System
0 0
Advertising Management System
PHP
Advertising Management System
CPA Partnership System
0 0
CPA Partnership System
PHP
Development of CPA Partnership System

Client reviews

Conducting a consultation in a call format
Personal 22 USD
Everything is great, I received the necessary help. I recommend.

5.0

Sergey Ivanov

Sergey Ivanov

29 November 2024
LanoisseforP a ot klaT
Personal 22 USD
I'm pleased with the result. Thanks.

5.0

Sergey Ivanov

Sergey Ivanov

29 September 2024
List ERC-20 token on UNISWAP
90 USD
Everything went great. Sergey helped with all the necessary issues. I recommend.

4.9

Sergey Ivanov

Sergey Ivanov

20 August 2024
Development of smart contracts
Personal 605 USD
everything was done according to the deadlines. communication was great. will reach out again if needed

5.0

Sergey Ivanov

Sergey Ivanov

13 July 2024
Web3 and smart contract for token presale on the Polygon blockchain
Personal 336 USD
I want to express my immense gratitude to Sergey for his work as a Blockchain developer. His professionalism, deep knowledge, and commitment to excellence make him indispensable in Blockchain project development.

5.0

Sergey Ivanov

Sergey Ivanov

23 June 2024
Smart Contract
224 USD
Everything at the highest level. Excellently worked

5.0

Sergey Ivanov

Sergey Ivanov

6 March 2024
Writing on the block
560 USD
We have proposed the optimal solution for our task. Communicative and easy to communicate. He did everything that was negotiated. Overcome the most bold expectations. I recommend it.

5.0

Sergey Ivanov

Sergey Ivanov

19 December 2023
Part 2
Personal 448 USD
Everything is good! We work further!

5.0

Sergey Ivanov

Sergey Ivanov

21 November 2023
The site needs to be implemented. Part 1
Personal 448 USD
We are all working well!

5.0

Sergey Ivanov

Sergey Ivanov

30 October 2023
The online wallet
Personal 605 USD
This stage of work on the front has been completed. Everything is great.I recommend.

5.0

Sergey Ivanov

Sergey Ivanov

11 June 2023
Написати код на Python, що підписує повідомлення (web3)
Personal 224 USD
Super performers ! I got the problem and wrote a good code. sincerely thank you

5.0

Sergey Ivanov

Sergey Ivanov

15 May 2023
Create the token
Personal 269 USD
The project was completed earlier than the time specified. He explained everything quickly and well. I recommend !

5.0

Sergey Ivanov

Sergey Ivanov

13 May 2023
The NFT Marketplace
Personal 784 USD
I recommend cooperation! Very quickly and professionally. I will contact you a little later. Thank you !

5.0

Sergey Ivanov

Sergey Ivanov

16 August 2022
Square of NFT
1008 USD
The professional in his case, everything went successfully. I advise everyone

5.0

Sergey Ivanov

Sergey Ivanov

16 August 2022
Development of Smart Contract, fencing coins on BSC
336 USD
I am very grateful to the performer, not only did the job excellently, but also explained how it works, showed and told.

5.0

Sergey Ivanov

Sergey Ivanov

27 June 2022
Connect to WS.
91 USD
This person is an unrealistic expert, very quickly found a solution to a task that many were unable to fulfill. I highly recommend!!! Pleasant to communicate!

5.0

Sergey Ivanov

Sergey Ivanov

28 November 2021
Puppeteer решение, в работающем проекте
Personal 16 USD
Быстро! и эффективно! результатом довольны! задача решена

5.0

Sergey Ivanov

Sergey Ivanov

1 November 2021
Puppeteer фикс бота в работающем проекте
Personal 31 USD
Очень быстро решена задача! доволен максимально )

5.0

Sergey Ivanov

Sergey Ivanov

1 November 2021
Boots to copy Binance Futures transactions
616 USD
I worked with Sergey for the first time. I really liked the responsible approach to work and the sincere desire to make the project quality. He found many nuances that had not been in the TZ, but which could in the future affect the quality of the project work.

During the development process, I extended the duration of the project, as I saw it takes a little more time for its quality implementation.

I recommend Sergey as a responsible developer, seeking to perform his work in a quality manner.
Separately I want to answer the positive that accompanied the entire development process ) Communication was pleasant and fun 🙂

4.9

Sergey Ivanov

Sergey Ivanov

11 September 2021
Fork GitHub repository and spin up web-interface
56 USD
The work is performed quality and in time.
Thank you !

5.0

Sergey Ivanov

Sergey Ivanov

19 June 2021

Indicators

Total projects:
37
Successful projects 92% 1 arbitration
Average rating:
-
36 reviews
4.9
Professionalism
4.8
Quality
4.8
Price
4.8
Contactability
4.8
Deadlines

Activity

Latest proposals 10
Project
Type Budget Proposal Deadline Added
React frontend developer
516 USD
516 USD
5 days 25 Mar
Loka | Connect smart contracts to the backend using NestJS, Tolk, Web3
Not specified
560 USD
5 days 25 Mar
Develop a smart contract system in Solidity for raising investments on the BSC network.
Not specified
112 USD
1 day 25 Mar
Organize the styles of the website (single style.css)
90 USD
90 USD
1 day 25 Mar
Updating Mern Stack project.
1500 USD
1500 USD
7 days 19 Dec 2025
Deploy
Not specified
22 USD
1 day 17 Dec 2025
Power Apps application for tracking time in production.
400 USD
2000 USD
10 days 19 Nov 2025
Audit of three smart contracts
Not specified
860 USD
2 days 19 Nov 2025
Audit of three smart contracts
Not specified
860 USD
2 days 19 Nov 2025
Round LED MCPCB board Ø30 mm for Cree XP LEDs (2 channels, common cathode)
34 USD
34 USD
7 days 17 Nov 2025
React frontend разработчик
Status Blocked by users
Type Public project
Budget 516 USD
Proposal 516 USD
Deadline 5 days
Added 25 March
Loka | NestJS, Tolk, Web3 підключити смарт-контракти до бекенду
Status Project expired
Type Public project
Budget Not specified
Proposal 560 USD
Deadline 5 days
Added 25 March
Разработать систему смарт-контрактов на Solidity для сбора инвестиций в сети BSC
Status Project expired
Type Public project
Budget Not specified
Proposal 112 USD
Deadline 1 day
Added 25 March
Навести порядок в стилях сайта (единый style.css)
Status Project expired
Type Public project
Budget 90 USD
Proposal 90 USD
Deadline 1 day
Added 25 March
Updating Mern Stack project.
Status Rules violated
Type Personal project
Budget 1500 USD
Proposal 1500 USD
Deadline 7 days
Added 19 December 2025
Деплой
Status Project expired
Type Public project
Budget Not specified
Proposal 22 USD
Deadline 1 day
Added 17 December 2025
Power Apps приложение для отслеживания времени на производстве.
Status Suspended by administration
Type Public project
Budget 400 USD
Proposal 2000 USD
Deadline 10 days
Added 19 November 2025
Аудит трех смарт контрактов
Status Suspended by administration
Type Public project
Budget Not specified
Proposal 860 USD
Deadline 2 days
Added 19 November 2025
Аудит трех смарт контрактов
Status Suspended by administration
Type Public project
Budget Not specified
Proposal 860 USD
Deadline 2 days
Added 19 November 2025
Кругла світлодіодна плата MCPCB Ø30 мм для світлодіодів Cree XP (2 канали, спільний катод)
Status Closed without completion
Type Personal project
Budget 34 USD
Proposal 34 USD
Deadline 7 days
Added 17 November 2025

Profile

Sergey Ivanov
  • Sergey Ivanov
  • Kyiv, Ukraine
  • 36 0
  • Available for hire
  • Projects 37
  • Rating -
  • Rating 2 751
Want to offer Sergey Ivanov a job?
Register

If you have an account, log in

Indicators

  • Last project: 1 year back
  • Collaboration with clients: 29
  • Projects involving arbitration: 1
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