__ \                      _)             ___|         |     _)  _)        
 |   |   _ \  __ \   __ \   |   __|     \___ \    __|  __ \    _ \   __ \  
 |   |   __/  |   |  |   |  | \__ \           |  (     | | |  (   |  |   | 
____/  \___| _|  _| _|  _| _| ____/     _____/  \___| _| |_| \___/  _|  _| 

       ~ Software Engineer ~
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# Summary

• Software Engineer with over 20 years of experience.
• Extensive knowledge in scaling and optimizing a business networking site to handle over 15 million users that generate 25 million dynamic page impressions per day.
• Experienced in leading engineering teams.

# Experience

Software Engineer July 2024 - current
Helsing, Munich, Germany (remote)

Principal Engineer Nov 2021 - July 2024
Aroundhome, Berlin (remote)

• Responsible for the company wide Tech Vision and Software Architecture.
• Planed and led the transition to our new Target Architecture.
• Build the initial versions of our new backend application and API gateway.
• Wrote a CLI tool to interact with our AWS/K8S setup which is now an integral part of the developer experience.

Senior Software Engineer Jan 2013 - Oct 2021
Freelance, Greater Hamburg area and remote

Tasks included bootstrapping new web applications, refactoring legacy apps and APIs, designing microservice infrastucture and startup tech consulting.
Technologies used: Go, Ruby on Rails, Python, Kubernetes, Docker, Consul, Kafka, MySQL, Elasticsearch, Graylog, ...

Senior Software Engineer Jan 2019 - Feb 2020
Twenty Billion Neurons GmbH, Berlin (remote)

Full ownership of a web platform that collects large amounts of video data used to train neural networks.
Technologies used: Go, Ruby on Rails, Postgres, AWS, Terraform, Ansible

Senior Software Engineer Sep 2017 - Jul 2018
Greenlight Software GmbH, Lippstadt (remote)

Full ownership of a web platform that enables companies to run online training courses for their staff.
Technologies used: Ruby on Rails, MySQL, Grafana, InfluxDB

Chief Technology Officer Mar 2011 - Sep 2012
loftville GmbH, Hamburg

Responsible for 5 Team Members (Frontend, Backend, Design). Tasks included leading the development of the website, building and maintaining the tech infrastructure, hiring and retention of talent, conflict management and budget planning.
Technologies used: Ruby on Rails, HAProxy, Nginx, unicorn, MySQL, Sphinx

Principal Software Architect Feb 2009 - Feb 2011
XING AG, Hamburg

Worked on the XING core architecture. Responsibilities included architecture, site performance, analyzing and solving problems in a complex multi-server (N > 300) environment, code quality assurance, automated testing and Release Management.
Technologies used: Ruby on Rails, Perl, MySQL, Redis, RabbitMQ, ...

Software Engineer Aug 2006 - Jan 2009
epublica GmbH, Hamburg

Worked on the product for our largest client, XING. Restructured the codebase to form a more Service Oriented Architecture; integrated asynchronous and parallel processing with Gearman; developed techniques for database schema changes on tables with 10s of millions of records without downtime; Responsible for the concept and integration of 3 acquired social networks (econozco, Neurona, cember.net) with a total of over 1.7 million users.

# Courses & Training

2010 - Gesprächsführung für Menschen in Schnittstellenpositionen
oose Innovative Informatik eG, Hamburg

2002 - RedHat Certified Engineer
RedHat Europe

# Open Source

Member of the NeoMutt Team - Github

# Language Skills