Tudor L.

Data Engineer

415 dollar
Freelancer
8 ans
Cluj-Napoca, ROUMANIE

Mon expérience

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ConnatixJuly 2018 - July 2019

Our team's goal was to optimize the way Connatix engine serves the ads, work
that has a big impact on both publishers and advertisers.

Main challenges were the volume and velocity of data generated - as we were

processing billions of events per day, and market dynamics.

My work involved :

- building a scalable and fault-tolerant data pipeline with the goal to efficiently

store, process and analyse the data.

- developing ML models responsible for finding patterns in users and

advertisers behaviours with the goal to improve ad serving and increase CPM.

Technologies involved : AWS services (Kinesis, Firehose, Athena, Glue, EMR,

S3), Apache Spark, Apache Parquet, Apache Zeppelin, Scikit-learn, Python,

Jupyter Notebook, Elastic-Search, Kibana
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TelenavJanuary 2012 - June 2018

During the first months I was working for Skobbler/Telenav, I succeeded
to create a proof of concept using Apache Hadoop and afterword I was

responsible of introducing Apache Hadoop in the company. This fact, I

consider my first personal success in my career.

I was involved in all the needed stages to develop a BigData projects and

maintain a BigData infrastructure, working and learning together with a great

team.

Main activities I was involved :

- deploying and maintaining an on-premise Apache Hadoop cluster (both

manually and using Cloudera).

- finding the optimal solutions to store and query the data

- designing, implementing and maintaining complex Java projects

(MapReduce/Spark) to get statistics from a large volume of geospatial data

- developing Machine Learning projects (Spark ML) to get insights from the

geospatial data with to goal to improve OpenStreetMap map.

- keep up-to-date with the latest trends/technologies in BigData and choose

those ones that made our work more efficient

During this time I had the chance to work with technologies like MapReduce,

Spark, Spark MLlib, Spark SQL, Storm, HDFS, HBase, Parquet, Avro, YARN,

Fair Scheduler, MongoDB, Ganglia, Hive, Oozie, Cloudera, Apache Zeppelin,

Jupyter notebook
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ZimilarMarch 2016 - July 2017

The trigger of starting Zimilar was because multiple times I had been in
the situation of seeing nice clothes worn by people on the street, TV and I

struggled searching them online. I asked myself why wasn't it possible to

take a photo with my phone and to have an application to search for a similar

product on the internet? That's how Zimilar started !

Together with some friends we worked on this product for more than one year,

we learned how to develop a product from scratch, how to market it or how to

discover your first client.

Besides the skills mentioned above, I was also involved into technical part,
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Evozon SystemsJune 2010 - December 2011

Being the first job after I graduated I faced developing a client application for the first time, being involved in one of the company's key projects. I also took all the possibilities to gather knowledge by participated in a series of presentation regarding various technologies and IT concepts such as Hibernate, Spring, Struts, JSP.

I used programming languages as Java1.5, C# and Python, using different development tools such as Intellij Idea, Eclipse, Microsoft Visual Studio 2005. I had the chance to work with OS such as Windows and Unix/Linux and get knowledge in application and database server such as Tomcat and Postgres.

Core achievements:
- Successfully developed and maintained a web application whose main functionality was monitoring a fleet of trucks

Mes compétences

Technologies

HDFS, MapReduce, Machine Learning

IT Infrastructure

Docker, Unix, Linux

Environment of Development

IntelliJ Idea, Eclipse IDE

Others

Ganglia, Kibana

Languages

Java, SQL

Databases

MongoDB, PostGreSQL

Big Data

Hive, Oozie, Hadoop, Big Data, Storm, Spark

Application servers

Apache Web Server

Other

Microsoft Visual Studio.NET, develop a BigData, Jakarta TOMCAT Servlet Engine, Junior entrepreneur, Java Developer, Microsoft C-SHARP, Microsoft Visual Studio, Microsoft Windows, Apache Hive, Java Server Pages, Spring Framework, Struts Web Application Framework, Co- Founder, Python Programming, finding patterns, Cloudera, Machine Learning Engineer, Apache HBase, Apache Parquet, develop a product, Proof of Concept, industry~it

Frameworks

Hibernate

Mes études et formations

- Babes-Bolyai Master- Distributed Sistems on Internet2010 - 2012

Diploma, computer science - Babeş-Bolyai University – Faculty of Mathematics and Computer2007 - 2010

- School of Computer Science and Electrical Group Bistrita2003 - 2007