Aratz Lasa
Senior Software Engineer at WarpStream
Spain
Summary
👤
Senior🎓
Top SchoolAratz Lasa is a Senior Software Engineer with nine years of experience specializing in high-performance distributed systems, streaming infrastructure, and large-scale data processing using Go and Apache Kafka. At WarpStream he has implemented core components from the ground up—most notably a Kafka protocol implementation, a resilient metadata store, and a system that maps Kafka topics to Apache Iceberg tables—supporting customer throughputs from hundreds of MiB/s to tens of GiB/s. His background blends research (AtLarge/VU Amsterdam) with hands-on product engineering, giving him a strong foundation in parallel and distributed systems. Beyond production systems, he contributes to open-source networking work such as implementing routing and host functionality for the py-libp2p project, showing practical expertise in peer-to-peer protocols and testing. Colleagues describe him as someone who pairs performance-minded system design with attention to user-facing reliability and cost optimization. Based in Spain, he brings academic rigor (top grades in Computer Science) to shipping pragmatic, measurable improvements in streaming platforms.
9 years of coding experience
6 years of employment as a software developer
Master's degree, Computer Science, 8.8/10, Master's degree, Computer Science, 8.8/10 at Vrije Universiteit Amsterdam (VU Amsterdam)Bachelor of Science - BS, Computer Engineering, 9.43/10 · First class honours, Bachelor of Science - BS, Computer Engineering, 9.43/10 · First class honours at University of Deusto
Basque, Spanish, English
Stackoverflow
1,328reputation
72kreached
2answers
0questions
python
top-5%
Github Skills (12)
pytest10
python10
networking10
libp2p10
kademlia10
testing10
routes9
routing-slip9
pipfile6
android6
pipenv6
google-maps6
Programming languages (10)
Github contributions (5)
libp2p/py-libp2p
Oct 2019 - Oct 2019
The Python implementation of the libp2p networking stack 🐍 [under development]
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits, 6 PRs, 26 comments in 1 day
Contributions summary:Aratz implemented core networking features for the libp2p project, focusing on routing and host functionalities within the Python implementation. This included designing and integrating a routing system for the `RoutedHost` class, ensuring peers could be discovered. The user's work involved modifications to key files like `swarm.py`, `routed_host.py`, and `kademlia_peer_router.py` demonstrating an understanding of networking concepts. Furthermore, the user added tests to validate the implemented routing logic.
pythonpython-implementationp2pnetworkingunder-development
aratz-lasa/webGraph
Feb 2019 - Dec 2019
Given an initial url, it produces a graph showing how it links to other pages, and those pages to others, and so on...
Contributions:44 commits, 16 pushes, 1 branch in 10 months
open-graphinitiallinksgraph
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