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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<link rel="stylesheet" type="text/css" href="dep/normalize.css/normalize.css"/>
<link rel="stylesheet" type="text/css" href="dep/Font-Awesome/css/font-awesome.css"/>
<link rel="stylesheet" type="text/css" href="style.css"/>
</head>
<body lang="en">
<section id="main">
<header id="title">
<h1>Denys Fakhritdinov</h1>
<span class="subtitle">Software engineer</span>
</header>
<div>
Interested in Scala & Rust, passionate about distributed systems, databases and functional programming.
</div>
<section class="main-block">
<h2>
<i class="fa fa-suitcase"></i> Experience
</h2>
<section class="blocks">
<div class="date">
<span>present</span>
<span>Nov 2020</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Software Engineer</h3>
<span class="place">Evolution</span>
<span class="location">Amsterdam, Netherlands</span>
</header>
<div>
<div>
Cluster Sharding and Kafka-Journal Maintenance:
<div>
Developed a <b>state-transfer feature</b> for Akka Cluster Sharding to optimize shard rebalancing,
reducing persistence load, minimizing actor downtime, and improving rebalance throughput.
</div>
<div>
Replaced Akka Persistence with a pull-based persistence API to integrate with
functional programming logic and enable backpressure during recovery.
</div>
<div>
Supervised Kafka-Journal enhancements, including team contributions,
data integrity improvements, and a strategic redesign for query-efficient,
reliable persistent streaming systems.
</div>
</div>
<div>
Agent-Wallet Service Development:
<div>
Designed a reliable real-time tracking service for agent limit changes with idempotent bet processing.
</div>
<div>
Delivered a system that operated with minimal changes, supported by other teams for years.
</div>
</div>
<div>
RNG Core Team Contributions:
<div>
Advanced game engine development for first-person multiplayer games,
optimizing state management with Akka Cluster Sharding for sub-10ms state replies
and Kafka-Journal for asynchronous event persistence.
</div>
<div>
Introduced geo-based routing to improve client connection efficiency across multiple regions.
</div>
<div>
Enhanced API flexibility for game logic and ensured game tolerance to configuration changes without gameplay interruptions.
</div>
</div>
<div>
<b>Technologies:</b> Scala, Akka (Cluster/Sharding/Persistence), Kafka, Cassandra, HTTP4S, Cats, FS2, Kubernetes, Prometheus.
</div>
</div>
</div>
</section>
<section class="blocks">
<div class="date">
<span>Oct 2020</span>
<span>Feb 2020</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Software Engineer</h3>
<span class="place">eBay (Contractor)</span>
<span class="location">Amsterdam, Netherlands</span>
</header>
<div>
<div>
Developed a new customer support system with distributed, fail-safe, and event-sourced architecture.
</div>
<div>
Implemented CQRS patterns to enhance query efficiency and integrate with backend systems.
</div>
<div>
Migrated data from legacy system into new one without downtimes.
</div>
<div>
<b>Technologies:</b> Scala, Monix, Kafka, Cassandra, Elasticsearch.
</div>
</div>
</div>
</section>
<section class="blocks">
<div class="date">
<span>Jan 2020</span>
<span>Aug 2018</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Software Engineer</h3>
<span class="place">ING</span>
<span class="location">Amsterdam, Netherlands</span>
</header>
<div>
<div>Tech team leader</div>
<div>
<div>
Design and implement a schemaless analytical data storage for user notifications across platforms.
</div>
<div>
Contributed in development of robust data pipelines for diverse business cases.
</div>
<div>
Introduced tracing and monitoring solutions to enhance operational visibility.
</div>
<div>
Mentored interns, fostering skill development and knowledge sharing.
</div>
</div>
<div>
<b>Technologies:</b> Scala, Akka-HTTP, Cats, FS2, Apache Flink, Kafka, Cassandra, Prometheus.
</div>
</div>
</div>
</section>
<section class="blocks">
<div class="date">
<span>Jul 2018</span>
<span>May 2017</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Software Engineer</h3>
<span class="place">Credit Suisse (Contractor)</span>
<span class="location">Wroclaw, Poland</span>
</header>
<div>
<div>
Developed tools and applications for Equity Derivatives, contributing to product innovation,
risk management, and revenue generation.
</div>
<div>
<b>Technologies:</b> Scala, Akka, Kafka.
</div>
</div>
</div>
</section>
<section class="blocks">
<div class="date">
<span>Apr 2017</span>
<span>Apr 2016</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Software Engineer</h3>
<span class="place">dé VakantieDiscounter</span>
<span class="location">Amsterdam, Netherlands</span>
</header>
<div>
<div>
Developed APIs for booking accommodations and flights, integrating with third-party services.
</div>
<div>
Developed frontend, backend and integrated with third-party provider car rentals.
</div>
<div>
Migrated infrastructure to AWS and implemented Spark-based data pipelines.
</div>
<div>
<b>Technologies:</b> Scala, Akka, MongoDB, React, Apache Spark.
</div>
</div>
</div>
</section>
<section class="blocks">
<div class="date">
<span>Mar 2016</span>
<span>Apr 2015</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Software Engineer</h3>
<span class="place">Conductor (Contractor)</span>
<span class="location">Wroclaw, Poland</span>
</header>
<div>
<div>
Developed Hadoop ETL pipelines for client statistics, business metrics analysis
and recommendation generation.
</div>
<div>
<b>Technologies:</b> Java, Apache Hadoop, HBase.
</div>
</div>
</div>
</section>
<section class="blocks">
<div class="date">
<span>Mar 2015</span>
<span>Dec 2013</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Java developer</h3>
<span class="place">UBS, contractor</span>
<span class="location">Kyiv, Ukraine</span>
</header>
<div>
<div>
Built trading components for Fixed Income markets and developed event-driven applications for the ION trading platform.
</div>
<div>
<b>Technologies:</b> Java, ION.
</div>
</div>
</div>
</section>
<section class="blocks">
<div class="date">
<span>Nov 2014</span>
<span>Mar 2011</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Junior Java Developer</h3>
<span class="place">Softworks</span>
<span class="location">Mykolaiv, Ukraine</span>
</header>
<div>
<div>
Developed single-page web apps, web crawlers, and maintained infrastructure.
</div>
<div>
<b>Technologies:</b> Java, Vaadin, Puppet.
</div>
</div>
</div>
</section>
</section>
<section class="main-block concise">
<h2>
<i class="fa fa-graduation-cap"></i> Education
</h2>
<section class="blocks">
<div class="date">
<span>2014</span>
<span>2012</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Master's degree, computer science</h3>
<span class="place">Admiral Makarov National University of Shipbuilding</span>
<span class="location">Mykolaiv, Ukraine</span>
</header>
</div>
</section>
<section class="blocks">
<div class="date">
<span>2012</span>
<span>2008</span>
</div>
<div class="decorator">
</div>
<div class="details">
<header>
<h3>Bachelor's degree, computer science</h3>
<span class="place">Admiral Makarov National University of Shipbuilding</span>
<span class="location">Mykolaiv, Ukraine</span>
</header>
</div>
</section>
</section>
</section>
<aside id="sidebar">
<div class="side-block" id="contact">
<h1>
Contact Info
</h1>
<ul>
<!-- <li><i class="fa fa-globe"></i>TODO</li>-->
<li><i class="fa fa-linkedin"></i>linkedin.com/in/denys-fakhritdinov</li>
<li><i class="fa fa-envelope"></i>denys.fakhritdinov at gmail.com</li>
</ul>
</div>
<div class="side-block" id="skills">
<h1>
Skills
</h1>
<ul>
<li>Scala, Clojure, Java</li>
<li>Distributed systems, functional programming, event sourcing</li>
<li>Akka, Kafka, Cassandra</li>
</ul>
</div>
</aside>
</body>
</html>