Sergey K.
Private message
Offer work
Sumy,
Ukraine
available for hire
Rating
Skills and abilities
Programming
Photo, Audio & Video
Translation
Portfolio
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Java, SQL, C++/C#, Python
Databases & SQL
Writing theoretical and practical works on the topic of IT
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4x6 Recipe Box
Copywriting
Writing a promotional article in English
Reviews and compliments on completed projects 112
I am satisfied with the cooperation. The lawyer promptly prepared the acceptance-transfer act, took into account all the details, and answered clarifying questions.
6 September 2025
16 USD
Data collection
Everything is done clearly and on time. Just as I needed. Thank you.
2 July 2025
27 USD
Transcription
We are not working for the first time.
Everything is as always clear. Thank you for the work.
9 January 2025
11 USD
Flowcharts
I am sincerely grateful for the help, great performer!)
27 October 2024
18 USD
Transcription
Thank you for another well-executed project.
1 October 2024
23 USD
Transcription
Thank you for the work. As always, no questions.
22 September 2024
9 USD
Transfer tables from PDF to Excel
The work was completed on time and of high quality!
13 September 2024
14 USD
Rewrite the text in 3 copies. Original - 4800 characters.
The quality of work leaves much to be desired.
11 September 2024
9 USD
Write text in English "4x6 Recipe Box"
The text is written according to the specifications. Everyone is satisfied. Thank you.
23 August 2024
23 USD
Practical work
The work was completed on time, everything according to the specifications, great!
13 August 2024
23 USD
Develop an Android application that interacts with the SQLite database as specified.
Very high-quality work, ahead of schedule, huge thanks
2 August 2024
9 USD
Write a text on the topic of cryptocurrency 4.0
Thank you for the cooperation! Everything was done promptly and according to the specifications!
31 July 2024
30 USD
Writing an article in English on the topic of music promotion
Quick quality work. All conditions of the technical assignment were taken into account. The contractor is always in touch.
20 January 2024
23 USD
Translation
As always on the level.
Thank you for work
16 September 2023
16 USD
Translation of text by video
It’s clear as always. It is not the first and not the last time we work.
20 June 2023
11 USD
Laboratory work on s/s++
The work was done very quickly and efficiently.
22 February 2023
11 USD
Practical work on C++
The author has always been in contact, quickly and efficiently completed the project. I recommend to everyone.
18 February 2023
11 USD
Software add-on in “C”. Terminal
We’re going to work together and forward. I recommend to everyone
10 February 2023
11 USD
Formatting and management of database for SQL language support
Fast and efficiently done work!
29 January 2023
7 USD
Transcribe 35 minutes of audio (coach session)
I made it faster than I needed. I recommend cooperation!
3 January 2023
11 USD
Laboratory work and diagram on the database in live sql
Good work in a short time.
12 December 2022
23 USD
Home Work 3
Everything was done even in advance, thank you for the speed and high level of professionalism. I will contact you again.
2 December 2022
45 USD
Home Work 2
Everything was done even before the deedline and everything was right. Everyone has been done quickly and has been done twice, I recommend it.
23 November 2022
9 USD
Laboratory work of C++
Greatly performed work. Everything is done in the time and in the time.
20 November 2022
16 USD
Home work at the university
Everything is done well and in time.
11 November 2022
14 USD
Mathematical Concepts
Great work, thank you for your collaboration!!The !
7 November 2022
7 USD
Mathematical Concepts
Great work, as always. Thank you for cooperation
5 November 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
2 November 2022
7 USD
Mathematical Concepts
Great work thank you for your collaboration!
1 November 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
28 October 2022
7 USD
Mathematical Concepts
Great work thank you for cooperation.
20 October 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
19 October 2022
7 USD
Mathematical Concepts
Thank you for your collaboration, as always great work!
17 October 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
16 October 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
11 October 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
10 October 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration!
4 October 2022
14 USD
Mathematical Concepts
Great work, as always at the height.
25 September 2022
7 USD
Mathematical Concepts
Thank you for your collaboration, great work!
20 September 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration!
18 September 2022
7 USD
Mathematical Concepts
Great work, quality at the height!
16 September 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
14 September 2022
7 USD
Mathematical Concepts
This is a wonderful robot, I recommend.
11 September 2022
7 USD
Mathematical Concepts
A great robot, I recommend.
7 September 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
6 September 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
5 September 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
4 September 2022
11 USD
Make a quality manual re-right of articles in English
The work is done well. and thank you.
2 September 2022
7 USD
Mathematical Concepts
Приємно співпрацювати, чудова робота
31 August 2022
7 USD
Mathematical Concepts
Good work, we work together.
30 August 2022
12 USD
Make a quality manual re-right of articles in English
Work done in time and quality.
27 August 2022
14 USD
Make a quality manual re-right of articles in English
The work is done very well and timely! The result is satisfied.
25 August 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration.
24 August 2022
13 USD
Make a quality manual re-right of articles in English
The work is done well. I’m going to go to the executive again.
21 August 2022
7 USD
Mathematical Concepts
The work was great, thank you for cooperation.
19 August 2022
7 USD
Описать алгоритм
Great work, I hope for future cooperation.
18 August 2022
7 USD
Опис алгоритмов
Робота виконана швидко, як завжди приємно співпрацювати!
17 August 2022
7 USD
Mathematical Concepts
Якісно виконана робота, вкотре співпрацюємо.
16 August 2022
7 USD
Mathematical Concepts
Good work, pleasant collaboration
15 August 2022
13 USD
Make a quality manual re-right of articles in English
Roosevelt is done well.
13 August 2022
7 USD
Mathematical Concepts
Great work, thank you for your collaboration!
11 August 2022
9 USD
Make a re-right article in English
The work was done very quickly and efficiently!
9 August 2022
7 USD
Mathematical Concepts
The work is done greatly! As always, pleasantly collaborating.
9 August 2022
11 USD
Make a re-right article in English
Excellent and good work at the scheduled time. I recommend the executive.
7 August 2022
7 USD
Mathematical Concepts
A great professional, we work all up!
5 August 2022
7 USD
Mathematical Concepts
The work was done quality and very quickly.
4 August 2022
7 USD
Mathematical Concepts
The work was done wonderfully and quickly.
31 July 2022
7 USD
Mathematical Concepts
The work was performed greatly.
28 July 2022
7 USD
Mathematical Concepts
The work is done at the height, everything is fast and quickly!
26 July 2022
7 USD
Mathematical Concepts
The work is done greatly, everything is clear and fast.
21 July 2022
5 USD
Basic Principles of OOP
The work has been done quickly in time, I highly recommend!
15 July 2022
7 USD
Practical tasks with C++
Work is fast and efficient – everything is done according to the task. I recommend it!
13 July 2022
7 USD
Translation
Everything is well. There is no narcissus. Made by Consciousness
10 July 2022
14 USD
Quality manual re-right of English-speaking article for the website
Excellent work done before the specified deadline. I recommend the executive Sergey Kovalevsky.
8 July 2022
10 USD
Make a re-right article to the website in English
Excellent work done, very rapidly, faster than the scheduled time. I recommend Sergey Kovalevsky as a responsible executor.
7 July 2022
8 USD
Translation from Russian to English
Very fast and well, happy with work.
5 July 2022
7 USD
Course Robot
A very good and positive person! It works quickly, quality and at a delicious price! I recommend to everyone!
28 June 2022
6 USD
Concepts
Or to create a project?
It is a great pleasure to work together, master of your business.
27 June 2022
6 USD
Mathematical Concepts
Master of your business. The work is done in time, even earlier.
25 June 2022
6 USD
Mathematical Concepts
Excellent copywriter, master of his business, the robot is done quickly!
23 June 2022
6 USD
Project by OOP, you need to do up to 12 hours (23.06.22)
The freelancer made the task very quickly, everything in time. Very much thank you.
21 June 2022
5 USD
Implementing tasks
All good, fast, quality, freelancer I recommend
20 June 2022
5 USD
Connecting the task
The project has been done well in the scheduled time. I recommend it!
10 June 2022
23 USD
Database Tracking
The work is done properly and timely, I recommend cooperation.
2 June 2022
16 USD
Сделать несколько работ + ессе
Great work! It was pleasant to work together.
28 February 2022
5 USD
The Java Exam
Thank you for the quickly done work.
28 February 2022
6 USD
Отчет
Fast, high quality, not the first time we work.
19 February 2022
6 USD
Laboratory work in language C, Report
Everything is good, fast, quality.
| Response review
7 February 2022
5 USD
Block scheme by code Python and C
Everything was done quickly and quality.
18 January 2022
8 USD
Java - проект ( В программе IntelliJ Idea )
It was performed in 2 hours. They answered, explained, made and showed.
16 January 2022
15 USD
Solution of tasks
It is done effectively and responds quickly to the messages.
| Response review
10 December 2021
5 USD
perform 3 simple work on C++
Just the best performed the practical on which he sat and suffered for 2 weeks just respect
3 December 2021
5 USD
Task by Java
The work is done in good quality and timely, thank you!
3 December 2021
11 USD
Development of the algorithm and programming of calculation tasks in language
The graduate greatly dealt with writing a course on the theme of developing an algorithm of linking the calculation task in the language of the C. The work was divided into sections, divided according to the given sample, drawn up with screenshots, explanations using the appropriate terminology. It was less time spent on the performance, but everything was done very well. I will definitely go again.
16 November 2021
6 USD
The task of C++
Excellent performance during the work)
14 October 2021
10 USD
Translate the article into English
Thank you very much, the article was allowed to be published. I wish success!
| Response review
18 September 2021
7 USD
The task of R
The executor did everything very quickly, clearly, answered the necessary questions and explained the uncomprehensible moments!
I am very pleased and strongly recommend!
A lot of thanks!
29 April 2021
5 USD
Задачки по С
Супер! Спасибо огромное! Качество на высоте!
28 April 2021
5 USD
Задачки по С
Мега скорость, мега качество! Спасибо!
16 April 2021
9 USD
Задачки по Python и С
Быстро, качественно. Спасибо
6 April 2021
11 USD
Задачки по Python и С
Все работает, спасибо. Быстро, качественно. Рекомендую!
26 March 2021
11 USD
Решить задачи на языке С
Все отлично! Быстро и качественно! Спасибо!
19 March 2021
18 USD
Решить задачи на языке С
Все супер. Оперативно, качественно. Быстрая коммуникация, консультация по вопросам. Спасибо.
13 March 2021
14 USD
Solution of simple tasks in language C
Fast, high quality, everything at the height. Thank you !
7 March 2021
9 USD
Write a few simple requests in SQL for SQL Lite
The work was done before the deedline. Fast and according to TZ.
4 February 2021
5 USD
Help to solve a mistake on C.
A good freelancer. Qualitatively and quickly done work
22 November 2020
5 USD
Task by C#
Everything is great, done in time. Working pleased
5 November 2020
11 USD
Python JSON Task Solution
SpasiboSpasiboSpasiboSpasiboSpasiboSpasiboSpasiboSpasiboSpasiboSpasiboSpasiboSpasiboSpasiboSpasibo
24 September 2020
7 USD
Laboratory of C++
High level of communication with the customer, high speed of performance.
24 September 2020
13 USD
Normal algorithms
Operational, punctual, support and outside of the project, I advise.
21 August 2020
6 USD
I am looking for a wing. Repair the visual, set the slides, check the code.
For me, the most important feedback and compliance with the principle said = done. Sergey was always in touch. The initial agreement on all work points was completed. And for me, it’s two hallucinations, connection and man-word. Thank you for your collaboration and I will call again.
| Response review
18 August 2020
26 USD
Верстка
отличный исполнитель! Рекомендую!
Activity
| Latest proposals 10 | Budget | Added | Deadlines | Proposal | |
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Transcription of texts
27 USD
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Translation
11 USD
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Transcription from two videos
226 USD
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Check English text
11 USD
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Copy subtitles from the video
16 USD
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Rewriting text in English
11 USD
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Selective work on editing and placing a web resource on the GitHub platform
23 USD
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Transcribing video
23 USD
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Translation from Russian to Ukrainian of a children's book text
16 USD
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Write a text in English for the iGaming theme.
23 USD
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