Ivan Kostyuk

On the battle server today everything fell and nothing happened, as in the test.Documentation below the average level, knowledge in setting his own code to solve specific tasks in Ivan is not enough - says Devops under these tasks is needed, and he should not know how to develop his code on the server and test (as it turned out, he used in primary execution the library that last updated in 2013, on his Mac there were no problems with the launch, however on the provided to me specifically under task servers under the OS they indicated he was never able to launch it, in what initially accused me, but in the end he was still rewrite to more modern solutions and could launch on Ubuntu).Why then take a task if you don’t imagine how it will work, write a code that we don’t apply in life under a task.On my fair remarks that the code will not work as it should (which was seen on the first day of the tests) Ivan began to offer after 1.5 hours of arbitration call and said that he spent too much time on the task, and his rating on Upwork $35 was once and in general he was tired of this task and asks it to close faster, but ready to still submit and repair, try to set up to work for additional $50.As a result, as in the previous review, the price was increased, then again, but as a result, the code and time goes on the waste and 2+ weeks of time - the code is not possible to use, I'll look for another person for refining, although it's likely to have to be from 0.Ivan was proposed Rabbit and Redis instead of Mysql with blockages and its optimization, which led to care in the surcharge of the server on a row of ~5 million links already goes SWAP at 8GB operations, and the task implies 250 million links, that is, Rabbit such row is unable to process on some adequate server resources, this task strengthens only the normally set database with blockages and transactions.Also, for ununderstood reasons, the processes on the server generally cease to go and something falls out of the technology stack, and does not restart as needed.

The plus:
- Ivan is a specialist in his field and offers options to improve the project, possesses the technology and experience on the announced project
- Available at almost any time of day and night, quickly responds
The final product is as needed.

The Minutes:
It values its time more expensive than the customer’s time and includes the cost of the project time spent on its own difficulties with the development of the code on the empty server provided. I was spending too much time on requests for documentation to the work done and bringing the project to a working state + had to be paid in the end for it. From the initially submitted project to check (which was not accepted due to the impossibility of its use) to the final acceptance the speed of the code and the project as a whole was increased more than 20 times by means of straight and spent N hours of joint letters/the following straight.

Everything was done to great, there were some outgoing improvements with which they managed better than to great!
I recommend cooperation!

Everything is great. The work was done quickly and quality!

The task was not easy to re-work a project that was done very poorly by other performers.

There were a lot of work and work, but they did everything greatly. The project works properly and performs all functions.

I recommend cooperation!

Ivan has worked professionally. I was pleasantly surprised by the result, as it is really a quick, accurate and professional solution! In addition, Ivan was advised on all issues. Good literacy, great speed, pleasant communication! I strongly recommend cooperation!

Everything is great. The code is clean. Thank you for work.

I am very pleased with the work with Ivan. He quickly broke down the project and fulfilled the assigned task. I recommend cooperation.

Everything was done quickly, all wishes were qualitatively fulfilled, I recommend cooperation.