Lars Butzmann, Developer in Berlin, Germany
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Lars Butzmann

Verified Expert  in Engineering

Software Developer

Location
Berlin, Germany
Toptal Member Since
June 18, 2020

After starting a PhD in enterprise systems, Lars joined a startup in San Francisco to develop their analytics product. He has experience working remotely in the past with clients in NYC and in London. He enjoys working with everything related to data so much so that he considers himself a SQL hero. Lars also has used Python and begun using JavaScript/CoffeeScript since it allows for fast prototyping and still creates production-ready solutions.

Data EngineeringMySQLGitSQLPostgreSQLPythonScrumSQLiteLinuxSublime TextDjangoBashNode.jsMongoDBExpress.js

Availability

Part-time

Preferred Environment

PyCharm, Git, ITerm, Sublime Text, OS X

The most amazing...

...project I've worked on allowed a brand to analyze their sales in a way they haven't even dreamed about before.

Work Experience

PhD Student

2014 - PRESENT
Hasso Plattner Institute
  • Conducted research that was focused on an enterprise system and their databases.
  • Worked with a multibillion-dollar CPG brand to understand and improve their reporting capabilities.
  • Created a prototype to simulate the companies business (profit/loss analysis) which allowed them to connect it to their actual data.
  • Published four papers about in-memory databases and the software using it.
Technologies: SQL, JavaScript, Python

Director of Analytics

2015 - 2018
42 Technologies
  • Created a platform which helps retailers analyze hundreds of million of records.
  • Made weekly customer calls to discuss and plan features.
  • Added more than ten integrations to the platform, from Google Analytics to different POS systems to inventory.
  • Improved the query performance by rewriting the SQL and tuning the database.
Technologies: SAP HANA, Spark, Python

Software Engineer

2011 - 2014
SAP SE
  • Analyzed customer data regarding patterns, distribution and data types, and created a summary.
  • Worked on a database for proteomics data.
Technologies: SQL, R, JavaScript

Software Engineer

2010 - 2011
SAP SE
  • Created an available-to-promise prototype on SAPs new HANA database using JavaScript, Python, and SQL.
  • Built a data generator to create large data sets and realistic workloads for testing.
  • Set up a continuous integrations using Jenkins.
  • Presented results to internal SAP teams.
Technologies: JavaScript, SQL, Python

Languages

SQL, Bash, CoffeeScript, JavaScript, Python, R

Tools

Git, Sublime Text, ITerm, PyCharm, Grunt, Jenkins

Platforms

SAP HANA, Linux, OS X

Storage

PostgreSQL, MySQL, MongoDB, SQLite

Other

Data Engineering

Frameworks

Apache Spark, Express.js, Django, Spark

Libraries/APIs

Node.js

Paradigms

Scrum

2011 - 2014

Master of Science Degree in IT Systems Engineering

Hasso Plattner Institute - Potsdam, Germany

2007 - 2010

Bachelor of Science Degree in IT Systems Engineering

Hasso Plattner Institute - Potsdam, Germany

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