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<!DOCTYPE html>
<html>
<head>
<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-135502806-1"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag() { dataLayer.push(arguments); }
gtag('js', new Date());
gtag('config', 'UA-135502806-1');
</script>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<meta name="keywords" , content="profile,page,Leonard,Seffer,Data,Science">
<meta name="description" , content="A small profile page describing the professional expertise of Leonard Seffer.">
<meta name="theme-color" content="#23191C">
<title>Leonard Seffer in brief</title>
<link rel="stylesheet" type="text/css" href="./css/reset.css">
<link rel="stylesheet" type="text/css" href="./css/font-awesome.css">
<link rel="stylesheet" type="text/css" href="./css/layout.css">
<link rel="stylesheet" type="text/css" href="./css/progress_circle.css">
<link rel="shortcut icon" href="./img/favicon.png">
</head>
<body>
<div id="Navigation">
<ul class="normal-nav">
<li><a href="#Home">Home</a></li>
<li><a href="#Aboutanchor">About</a></li>
<li><a href="#Resumeanchor">Resume</a></li>
<li><a href="#Skillsanchor">Skills</a></li>
</ul>
</div>
<div class="container">
<section id="Home">
<div class="titlename">
<h1>Leonard Seffer</h1>
<p>I'm a Stockholm based <span style="font-weight:bold">Software Engineer</span> passionate about backend engineering,
distributed computing and machine learning.</p>
<ul class="social">
<li><a target="_blank" href="https://www.linkedin.com/in/leonard-seffer-data/"><i
class="fa fa-linkedin fa-2x"></i></a></li>
<li><a target="_blank" href="https://github.com/lseffer"><i class="fa fa-github fa-2x"></i></a></li>
<li><a target="_blank" href="https://www.facebook.com/leonard.seffer"><i
class="fa fa-facebook fa-2x"></i></a></li>
</ul>
</div>
<a href="#Aboutanchor"><i class="fa fa-chevron-circle-down fa-3x"></i></a>
</section>
<section id="About">
<div id="Aboutanchor" style="position: relative; top: -70px; left: 0"></div>
<div class="sidebar">
<img src="./img/profilepic.jpg" class="profilepic">
</div>
<div class="content">
<h2>About me</h2>
<p>
I am a natural problem solver with passion for machine learning, AI, applied statistics and
programming. Having an impact is what drives me and is a source for great professional satisfaction.
I am a big believer in life-long learning and therefore I actively develop my skills on my free
time.
Privately I enjoy the simple pleasures of life such as conversing with friends and hanging out with
my dog and girlfriend. I like to stay active through floorball practice, gym and long walks with my
dog.
</p>
<h2>Contact Details</h2>
<p>Hit me up on LinkedIn or shoot an e-mail: <br>
<a href="mailto:[email protected]">[email protected]</a></p>
</div>
</section>
<section id="Resume">
<div id="Resumeanchor" style="position: relative; top: -70px; left: 0"></div>
<div class="resume-item">
<div class="sidebar">
<div class="sidebarheader">
<h2>EXPERIENCE</h2>
</div>
</div>
<div class="content">
<h2>Engineering Manager</h2>
<div class="work-time-paragraph">
<p><span style="font-style: italic;">Wolt</span></p>
<p>Jan 2019 - Present</p>
</div>
<p>
Helping push data around</p>
<ul style="list-style-type: disc; margin-left: 40px;">
<li>Building the next generation data platform for marketing</li>
<li>Lots of data engineering; Snowflake, Spark, Kafka</li>
<li>Lots of backend engineering; Go, Python, Postgres</li>
<li>Leading a team of 6 engineers</li>
<li>Previous roles at Wolt: Data Scientist, Data Engineer</li>
</ul>
<p></p>
<h2>Data Scientist / Analyst</h2>
<div class="work-time-paragraph">
<p><span style="font-style: italic;">Rovio Entertainment Corporation</span></p>
<p>Oct 2016 - Dec 2018</p>
</div>
<p>
I have developed, deployed and maintained machine learning / deep learning models in the cloud
for use in the business. A big focus early at the company was proactive and reactive analyses of
game data and A/B tests. Through these my team helped game teams make better data-driven
decisions. I have also automated / migrated a lot of legacy code and models to the cloud. I've
built feature-rich, aggregate database table structures for various games and use cases. I am
managing my business unit's automatic job executions and github repository.
</p>
<h2>Analyst</h2>
<div class="work-time-paragraph">
<p><span style="font-style: italic;">If P&C Insurance</span></p>
<p>Aug 2014 - Oct 2016</p>
</div>
<p>
I was responsible for monthly reporting of KPIs and interpretation / presenting of results and
implications to senior managers of the business area. I was also tasked with forecasting and
planning the portfolio's future performance as well as proposing price actions. I developed new
pricing models and validated their success, sometimes in collaboration with other analysts. I
created automated reports from different datasources serving multiple stakeholders in the
organisation. There was continuous analysis of the portfolio to find areas of improvement. I
also did many ad-hoc analyses about customers, premiums and claims.
</p>
</div>
</div>
<div class="resume-item">
<div class="sidebar">
<div class="sidebarheader">
<h2>EDUCATION</h2>
</div>
</div>
<div class="content">
<h2>Arcada University of Applied Sciences
</h2>
<div class="work-time-paragraph">
<p><span style="font-style: italic;">Big Data Specialization Studies</span></p>
<p>May 2016 - May 2017</p>
</div>
<p>
Series of courses focused on analyzing, vizualising and modelling big data. In total 25 ECTS.
Tools used were Apache Spark, Python, R and D3.js.
</p>
<h2>Åbo Akademi University</h2>
<div class="work-time-paragraph">
<p><span style="font-style: italic;">Master of Science</span></p>
<p>Aug 2009 - Jun 2014</p>
</div>
<p>
A Master of Science degree in applied mathematics, with specialization in insurance and finance.
Minor subjects were economics and statistics.
</p>
</div>
</div>
</section>
<section id="Skills">
<div id="Skillsanchor" style="position: relative; top: -70px; left: 0"></div>
<div class="sidebar">
<div class="sidebarheader">
<h2>SKILLS</h2>
</div>
</div>
<div class="content">
<p>Backend engineering and data engineering. Big data and stream processing. High performance microservices. Go, Scala, Python, Spark, Kafka, Snowflake, Postgres, Kubernetes, Terraform</p>
<div class="progress-container">
</div>
</div>
</section>
</div>
<script type="text/javascript" src="./js/util.js"></script>
</body>
</html>