Lars Butzmann, Developer in Berlin, Germany
Lars is available for hire
Hire Lars

Lars Butzmann

Verified Expert  in Engineering

Software Developer

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.



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
  • 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
  • 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


SQL, Bash, CoffeeScript, JavaScript, Python, R


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




PostgreSQL, MySQL, MongoDB, SQLite


Data Engineering


Apache Spark, Express.js, Django, Spark





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

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.


Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring