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Valerii K.

Offer Valerii work on your next project.

Ukraine Lvov, Ukraine
20 minutes back
Available for hire available for hire
1 Safe completed
1 month 13 days back
1 client
1 proposal made
on the service 1 year
  • selenium
  • telegram python bot
  • telegram bot

Rating

Successful projects
No data
Average rating
No data
Rating
1719
Python
371 place out of 4466
Bot Development
238 place out of 1904

CV

Full-Stack Python Developer | QA Engineer | Web & Desktop Software

Hello! I am a Full-Stack Python developer and QA engineer with experience in creating, integrating, and comprehensively testing modern web applications, desktop software, and Telegram services. I specialize in developing reliable backend solutions based on Flask and PostgreSQL, as well as creating asynchronous bots and Telegram Mini Apps (TMA) that provide fast response times and a seamless user experience.

A significant separate direction of my work is desktop software development. I create high-performance, cross-platform, and user-friendly desktop applications to automate complex business processes, process data, and solve specific local tasks. When designing interfaces, I prefer modern minimalism and dark-themed UI, ensuring maximum convenience and focus for the end user.

I also have extensive experience in building Progressive Web Apps (PWA) with full offline support, flexibly configuring the architecture and client-side data storage technologies depending on the unique needs of each individual project. I successfully implement complex tasks requiring deep interaction with third-party services. I have practical experience working with many popular interfaces, including 1win API, Binance API, CoinGecko API, Stripe API, Google APIs, Telegram API, as well as integrating various artificial intelligence models.

As a QA engineer, I pay maximum attention to the quality and stability of the product — from cloud services to local desktop programs. I conduct thorough manual and automated testing of functionality, APIs, and graphical interfaces. This allows for identifying flaws in the early stages of development and guaranteeing the smooth operation of the software even under non-standard conditions. By combining the skills of a developer and a tester, I release products that work quickly, securely, and flawlessly.

I am open to collaboration, detailed discussion of your tasks, and the development of the most effective technical solutions for your project, whether it is a complex web service or a powerful desktop application.


Search tags:Python, Python 3, Flask, Full-Stack, Backend, backend development, Python developer, programmer, QA Engineer, QA testing, software tester, web application testing, API testing, manual testing, automated testing, Pytest, Desktop development, desktop applications, software development, application creation, cross-platform development, GUI, PWA, Progressive Web Apps, Web Apps, web development, Service Workers, Telegram Mini Apps, TMA, Telegram Bot, bot development, chatbots, Telegram API, asyncio, REST API, API integration, 1win API, Binance API, CoinGecko, Crypto API, Stripe API, Google API, Payment API, AI integration, artificial intelligence, OpenAI API, parsing, data parsing, web scraping, automation, business process automation, scripting, scripts, PostgreSQL, databases, SQL, database design, software architecture, code optimization, financial integrations, cryptocurrencies, crypto bots, dark theme UI, minimalist design, UI/UX testing, quality assurance, software support.

Skills and abilities

Portfolio


Reviews and compliments on completed projects 1

20 April 593 USD
Part 2 Gambling programmer, programs on PWA

Quality
Professionalism
Cost
Contactability
Deadlines

The work was done very well and on time. The wallet turned out to be lightweight, convenient, and functional. The PWA technology was implemented correctly, with no bugs or delays. It is very pleasant to deal with a professional who knows their job. I am satisfied with the result.

Activity

  Latest proposals 10
Development of a Telegram bot with poker tests/quizzes
135 USD
Telegram Mini Apps
248 USD
Telegram bot for collecting applications from advertising (simple scenario, without CRM)
36 USD
Creation of a membership application for the organization on iOS and Android
28 USD
Part 2 Gambling programmer, programs on PWA Personal project
593 USD
Emulator
278 USD
A person is needed to perform tasks related to computational methods and models.
28 USD
It is necessary to send in personal messages on Telegram.
28 USD
Chat bot in Telegram
72 USD
Create a bot in Telegram
97 USD