egno.github.io/index.html at master · egno/egno.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta http-equiv="content-type" content="text/html;charset=UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>Alex Shel</title>
    <link rel="icon" type="image/x-icon" href="/images/favicon.ico" />

    <link
      href="https://fonts.googleapis.com/css?family=Roboto+Mono&display=swap"
      rel="stylesheet"
    />
    <style>
      html {
        background-color: #dddddd;
        font-family: "Roboto Mono", monospace;
      }
      body {
        max-width: 40em;
        margin: 0px auto;
        padding: 1em;
      }
      h1 {
        margin-top: 2em;
      }
      h2 {
        margin-top: 1.6em;
      }
      h3 {
        margin-top: 1.2em;
        margin-bottom: 0.5em;
      }
      p {
        margin-top: 0.4em;
        margin-bottom: 0.2em;
      }
      hr {
        border: none;
        border-top: 0.1em solid #888888;
        margin-top: 2em;
      }
      .image--float {
        border-style: solid;
        border-color: #888888;
        border-width: 0.1em;
        max-width: 40em;
        min-width: 8em;
        padding: 0.1em;
      }
      .thumb {
        width: 40em;
      }
    </style>
    <link rel="stylesheet" media="print" href="print.css" />
  </head>

  <body>
    <h1>Aleksandr Shelemetev /egno/</h1>
    <p class="no-print"><a href="#contacts">Contacts</a></p>
    <div class="wrapper">
      <div>
        <img class="image--float" src="images/as0013.jpg" />
        <h2>Profile</h2>
        <p>
          Experienced software engineer based in Bulgaria, with a career spanning multiple roles, including software developer, analyst, system administrator, DBA, and project manager since the 1990s. Holds an engineering degree (1994) and continually updates skills, most recently with Python, PostgreSQL, and Haskell.
        </p>
        <p>Currently a Senior Software Engineer at Gcore, and actively studying Haskell through the University of Helsinki.</p>
      </div>

      <div>
        <h2>Technical Skills</h2>
        <p>
          Backend: Python, Django, Celery, Flask, asyncIO, Go, REST API, GraphQL, Java, Haskell, .NET, C++
        </p>
        <p>
          Databases: SQL, PostgreSQL, MySQL, MS SQL, Oracle, PL/SQL, DBA, ClickHouse
        </p>
        <p>DevOps: Docker, Kubernetes, DroneCI, CI/CD, Linux, Git, GitHub, GitLab, RabbitMQ, Redis, Cloud computing</p>
        <p>Frontend: HTML, CSS, JavaScript, Node.js, Vue.js, Nuxt, Angular, d3js</p>
        <p>Other Languages: VBA, Delphi, Pascal</p>

        <h2>Experience</h2>
        <h3>Software Architecture & High-Load Systems</h3>
        <p>
          Extensive experience in designing, developing, and optimizing scalable, resilient architectures for high-load systems.
          Proficient in architectural patterns for distributed services, microservices, and performance-critical backends.
          Skilled at analyzing system bottlenecks and implementing solutions that improve throughput and reliability.
          Hands-on with technologies and practices supporting high availability and efficient scaling.
        </p>
        <h3>Industry Experience</h3>
        <p>
          Billing, Customer Service, Insurance, Logistics, Document Management
        </p>
      </div>
    </div>

    <hr />
    <h2>Latest achievements</h2>
    <div class="wrapper">
      <div>
        <h3>Acceleration of a bill calculation</h3>
        <p>
          Improved bill calculation performance by over 1000x and dramatically reduced database CPU utilization and lock contention.
        </p>
        <img class="image--float" src="images/img1_02.png" />
        <p>DB CPU utilization was reduced</p>
        <img class="image--float" src="images/img1_03.png" />
        <p>DB locks started to look insignificant</p>
        <img class="image--float" src="images/img1_05.png" />
      </div>
      <div>
        <h3>Acceleration of service activation</h3>
        <p>
          Reduced service activation time from over 10 minutes to just 4 seconds, greatly improving customer satisfaction.
        </p>
        </p>Before:</p>
        <img class="image--float" src="images/img2_01.png" />
        <p>After:</p>
        <img class="image--float" src="images/img2_02.png" />
      </div>
    </div>
    <div>
      <h3>Acceleration of project delivery</h3>
      <p>
        Halved CI pipeline duration from 12–16 minutes to 6–7 minutes by optimizing Drone CI configuration.
      </p>
      <img class="image--float" src="images/img12.png" />
    </div>
  </div>
    <hr />
    <div class="wrapper">
      <div>
        <h2>Professional Profiles & Publications</h2>
        <ul>
          <li>
            GitHub:
            <a href="https://github.com/egno">GitHub: egno</a>
          </li>
          <li>
            LinkedIn:
            <a href="https://www.linkedin.com/in/ashel"
              >LinkedIn: ashel</a
            >
          </li>
          <li>
            [EN] CodingSight:
            <a href="https://codingsight.com/author/alexandr-shelemetyev/">https://codingsight.com/author/alexandr-shelemetyev</a>
          </li>
          <li>
            [RU] Pro SQL blog:
            <a href="https://prosql.github.io/">https://prosql.github.io/</a>
          </li>
          <li>
            [RU] Short SQL Tutorial:
            <a href="https://prosql.github.io/book"
              >https://prosql.github.io/book</a
            >
          </li>
        </ul>
      </div>
      <div>
        <h2 id="contacts">Contacts</h2>
        <p>
          WhatsApp:
          <a href="https://wa.me/359882251752">+359-882-251-752</a>
        </p>
        <p>
          Telegram:
          <a href="https://t.me/lsduz">@lsduz</a>
        </p>
        <p>
          email:
          <a href="mailto:ex.lxndr@gmail.com">egno@duck.com</a>
        </p>
      </div>
    </div>
  </body>
</html>