From zero to PRO: Using GO @ bol.com

In this episode we talk about GO. Go is not a language that is used the most at bol.com. That’s is Java, together with Kotlin. In 2014 it was introduced for the first time and reached a steady but not so big user group. Recently, along with the move to the cloud, we experience a second wave of adoption. When you listen to the stories our two enthusiastic guests share in this episode, you might even believe Go is the future. Guests Rogier Lommers Tom Stoepker Hosts Peter Brouwers Peter…

Finding the longest matching string prefix … fast

Niels Basjes, on 10-12-2018
Category: Data Science & AI, Development Tags: Java Software Open source DataScience Algorithms

In many systems at bol.com the response speed of our systems is very important. This blog is about the data structures and algorithms we used to make a specific analysis step a lot faster: Finding the longest matching string prefix.

How (not) to sink a data stream to files? Journeys from Kafka to Parquet.

Gabor Hermann, on 30-07-2018
Category: Development Tags: Java Scalability BigData Open source distributed

Last year the Measuring 2.0 team at bol.com has started measuring user behavior on the bol.com website. Of course, we wanted to make the data widely accessible within the whole organization.

Making sense of the user agent string

Niels Basjes, on 30-03-2017
Category: Development Tags: Java Open source UX DataScience

Ever since I’ve started working for a WebAnalytics company in 2005 I’ve been working on problems related to making sense of web data. One of the most difficult elements in this type of analysis is making sense of the user agent.
Very often the raw web data I work with is stored in Apache HTTPD access log files that have been compressed using gzip.

GOTO Amsterdam 2017

On: 14 Jun 2017 at: Beurs van Berlage, Amsterdam
Category: Events Tags: Microservices Open source Hystrix Resilience

Attend “Resilience engineering in a microservice landscape” by Maurice Zeijen to learn how we at bol.com achieve fault tolerance.