Open Source
An inspired, customer focused community, dedicated to crafting solutions that redefine our industry.

Projects
Klarna is built of Open Source Software. We know the true value of it and that’s why we always want to contribute back to the community. Here are some of the projects we’re working on.
Erlang
circuit_breaker
★ 165An Erlang library for breaking out of faulty services
mnesia_eleveldb
★ 149An eleveldb backend for Mnesia
erlavro
★ 127Avro support for Erlang/Elixir
bec
★ 45The BitBucket Erlang Client
leveldb_manager
★ 31Small service for snapshotting eleveldb without stopping the Erlang node
avlizer
★ 19Avro Data Serializer for Erlang
JavaScript
Java
Alumni
These projects were born at Klarna, but have since ventured out in the world and started living their own lives.
kafkajs
★ 3256A modern Apache Kafka client for node.js
bull-board
★ 1570Queue background jobs inspector
brod
★ 622Apache Kafka client library for Erlang/Elixir
HiveRunner
★ 245An Open Source unit test framework for Hive queries based on JUnit 4 and 5
phobos
★ 216Simplifying Kafka for ruby apps
confluent-schema-registry
★ 132is a library that makes it easier to interact with the Confluent schema registry
kafka_protocol
★ 88Kafka protocol erlang library
People
There is a person behind the code. These are some of the people at Klarna that contribute to Open Source, here and elsewhere.
- Davide Mandelli
Th3Wall
- Simon Hänisch
simonhaenisch
- Stefano Azzolini
lastguest
- Sergey Prokhorov
seriyps
- Sebastian Silbermann
eps1lon
- Tommy Brunn
Nevon
- Juan Facorro
jfacorro
- Sergio Crisostomo
SergioCrisostomo
- Burkhard Reffeling
hardchor
- Waleed Ashraf
WaleedAshraf
- Joakim Uddholm
Tethik
- Umut Canbolat
umutcanbolat
- Itamar Ben-Zaken
benzaita
- António Almeida
antonioalmeida
- Pierre Wahlgren
Deschtex
- Mikael Pettersson
mikpe
- Hasan Güner
hasanguner
- Adnan Asani
adnasa
- Gabriele
gadiener
- Veaceslav Cotruta
katrotz
- Lorenzo Cestaro
lorenzocestaro
- Martino di Filippo
MartinodF
- Michael Kohler
MichaelKohler
- Igor
cra
- Case Taintor
ctaintor
- Vaibhav Arora
vaibhavar
- Taher Dhilawala
taher435
- Yurick
Yurickh
- Rickard Cardell
RickardCardell
- Artem
Scarg