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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width" />
<!-- No cache for now for debug reasons -->
<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Expires" content="0" />
<title>Ruby/Javascipt developer</title>
<link rel="stylesheet" href="css/style.css">
<link rel="stylesheet" href="css/font-awesome-4.2.0/css/font-awesome.min.css">
<script src="js/jquery.js"></script>
<link href="https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap" rel="stylesheet">
</head>
<body>
<section class="intro white">
<div class="content">
<div class='img-square-block'>
<img class='img-square' src='images/photome_square.jpeg'>
</div>
<div class="text-block">
<h2 class="poppins-bold">Viacheslav Kozlov</h2>
<p>Ruby on Rails Developer with 10+ years of experience delivering scalable, testable, and production-ready applications for tech startups.</p>
<p>Passionate about writing clean code, implementing robust testing, and transforming business needs into efficient architectures.</p>
<p>Leveraged entrepreneurial and marketing background to align technical solutions with business goals.</p>
<p>Top-rated Upwork developer with 9 years and 7,500 hours experience.</p>
</div>
<div class='img-block'>
<img src='images/photome.jpeg'>
</div>
</div>
</section>
<!-- Projects -->
<section class="projects blue">
<div class="content">
<h1 class="poppins-bold">Experience</h1>
<div class="project">
<div class="description">
<h2 class="poppins-bold"><a href="https://tipmetric.com">Tipmetric.com</a> - restaurant tips distribution made simple.</h2>
<p class='year-role'>2017-2025 | <span class="role">Lead developer</span></p>
<ul>
<li>Built MVP in 2 weeks, launching long-term product development</li>
<li>Integrated 10 restaurant financial APIs (Brink, Toast, Square, etc.)</li>
<li>Delivered 10+ performant multi-format (CSV, Excel) reports</li>
<li>Implemented full-stack architecture using Ruby on Rails</li>
<li>Ensured stable production delivery and robust testing using RSpec and Cuprite</li>
</ul>
</div>
<div class="images">
<a href="images/projects/tipmetric.png" target="_blank"><img src="images/projects/tipmetric.png" class="viewable"></a>
</div>
</div>
<div class="project">
<div class="description">
<h2 class="poppins-bold"><a href="https://questplanet.ru">Questplanet.ru</a> - city adventure services.</h2>
<p class='year-role'>2014-2020 | <span class="role">Lead developer, Cofounder</span></p>
<ul>
<li>Co-founded and led IT development and design</li>
<li>Maintained uninterrupted development over 4+ years</li>
<li>Built and maintained production-level Rails application</li>
<li>Achieved ~600 test cases with RSpec and Capybara</li>
<li>Sold ownership stake to partners in 2020</li>
</ul>
</div>
<div class="images">
<a href="images/projects/qp.png" target="_blank"><img src="images/projects/qp.png" class="viewable"></a>
</div>
</div>
<div class="project">
<div class="description">
<h2 class="poppins-bold"><a href="https://apps.apple.com/us/app/papr-news-reader/id1389981842">Papr</a> - new way of reading.</h2>
<p class='year-role'>2014-2016 | <span class="role">Web Developer</span></p>
<ul>
<li>Built web scraping and RSS integration pipelines</li>
<li>Developed online text editing interface</li>
</ul>
</div>
<div class="images">
<a href="images/projects/papr4.png" target="_blank"><img src="images/projects/papr4.png" class="viewable"></a>
</div>
</div>
<div class="project">
<div class="description">
<h2 class="poppins-bold"><a href="https://joany.com">Impacthealth</a>- healthcare that fits your needs</h2>
<p class='year-role'>2015 | <span class="role">Web Developer</span></p>
<ul>
<li>Added responsive feedback forms (HTML, CSS, JavaScript)</li>
<li>Improved layouts and visual presentation for landing pages</li>
</ul>
</div>
<div class="images">
<a href="images/projects/impacthealth.png" target="_blank"><img src="images/projects/impacthealth.png" class="viewable"></a>
</div>
</div>
<div class="project">
<div class="description">
<h2 class="poppins-bold"><a href="https://www.indiegogo.com/projects/uncoverage-news-that-works-for-you">Uncoverage</a> - platform for support investigative journalism.</h2>
<p class='year-role'>2013-2015 | <span class="role">Web Developer</span></p>
<ul>
<li>Developed widgets, subscriptions, and payment systems</li>
<li>Worked across frontend (Backbone, Marionette) and backend (Ruby on Rails)</li>
<li>Integrated Balanced Payments API</li>
</ul>
</div>
<div class="images">
<a href="images/projects/uncoverage_3.png" target="_blank"><img src="images/projects/uncoverage_3.png" class="viewable"></a>
</div>
</div>
</div>
</section>
<!-- Education -->
<section class="white">
<div class="content">
<h1 class="poppins-bold">Education</h1>
<p>I am a self-taught full-stack developer with a passion for building tailored, reliable web solutions. Self-education is one of my main values in all aspects of life. You can grow only if you educate yourself consistently.</p>
<p>Continuously enhance expertise through advanced coursework and self-study.</p>
<p><span class="poppins-bold">Harvard University: </span> CS50 Cybersequrity. // In progress </p>
<p><span class="poppins-bold">Harvard University: </span> CS50's SQL. Introduction to Databases with SQL (SQL, SQLite, Postgres). <a class='certificate-link' href="http"></a> <i class="fa fa-certificate"></i></p>
<p><span class="poppins-bold">Harvard University: </span> CS50x. Introduction to Computer Science (C, Python, Web) <a class='certificate-link' href="http"></a> <i class="fa fa-certificate"></i></p>
<p><span class="poppins-bold">GeekBrains:</span> System Administration. TCP/IP <a class='certificate-link' href="http"></a></p>
<p><span class="poppins-bold">GeekBrains:</span> Linux. Administration and Configuration. <a class='certificate-link' href="http"></a></p>
<p><span class="poppins-bold">Plekhanov Economic University</span>: Economics. Marketing (2002-2007)</p>
</div>
</section>
<!-- Skills -->
<section class="white">
<div class="content">
<h1 class="poppins-bold">Tech skills</h1>
<p>
<span class="accent">Frontend</span> - Javascript, Hotwire, Stimulus, Coffeescript, Backbone.js, Marionette.js, CSS, Html <br>
<span class="accent">Backend</span> - Ruby, Ruby on Rails, Sidekiq<br>
<span class="accent">Integrations</span> - AWS, Stripe, Robokassa, Yandex Kassa, Yandex Translate API, Telegram API, Restaurant Financial Services (Brink, Toast, Paychex, Focus, 7Shift, Paycom, Square)<br>
<span class="accent">CI/CD</span> - Capistrano, Rubocop, Git<br>
<span class="accent">Errors</span> - Rollbar<br>
<span class="accent">Testing</span> - Rspec, Capybara, Cucumber, Cuprite<br>
<span class='accent'>Dbs</span> - Postgres, SQLite3, MongoDB, Redis<br>
<span class='accent'>Server</span> - Unix, Docker, Docker Compose<br>
<span class='accent'>Other</span> - C, Pascal, Python, NeoVim<br>
</p>
</div>
</section>
<!-- Personal -->
<section class="white">
<div class="content">
<h1 class="poppins-bold">Personal</h1>
<p>
Interested in travelling, qigong, meditations, chinese tea ceremonies.
</p>
</div>
</section>
</body>
</html>