Backend
This category focuses on backend, infrastructure, reliability, and programming languages.
Why We Ditched Flink Table API Joins: Cutting State by 75% with DataStream Unions
The beauty of a high-level abstraction is that it lets you focus on the "what" rather than the "how." In the world... Read more...
Maryna Kryvko
Senior Software Engineer
Mar 04
2026
Paper Announcement: A Practical Approach to Replenishment Optimization with Extended (R, s, Q) Policy and Probabilistic Models
Learn how the ZEOS replenishment optimization system achieves up to 22.1% GMV uplift by unifying probabilistic... Read more...
Alva Presbitero
Senior Applied Scientist
Andreas Syrén
Senior Principal Applied Scientist
Hagop Dippel
Applied Science Manager
Lalita Awasthi
Junior Machine Learning Engineer
Shikhar Dev
Senior Machine Learning Engineer
Zhe Nie
Senior Applied Scientist
Jan 15
2026
Contributing to Debezium: Fixing Logical Replication at Scale
How we contributed two features to Debezium to solve WAL growth and enable safer logical replication for our event... Read more...
Conor Gallagher
Senior Principal Engineer
Dec 19
2025
The Day Our Own Queries DoS’ed Us: Inside Zalando Search
Once upon a time, during a normal Sunday, our team ran into an unexpected challenge: an Elasticsearch cluster that... Read more...
Maryna Kryvko
Senior Software Engineer
Ivan Potapov
Senior Software Engineer
Dec 17
2025
Dead Ends or Data Goldmines? Investment Insights from Two Years of AI-Powered Postmortem Analysis
Your incidents hold the blueprint to your most strategic infrastructure wins — if you're listening correctly. Read more...
Dmitry Kolesnikov
Senior Principal Engineer
Sep 25
2025
Building a dynamic inventory optimisation system: A deep dive
This technical blog outlines how we built a scalable inventory optimization system to help partners maintain a... Read more...
Alva Presbitero
Sr. Applied Scientist
Andreas Syren
Pr. Applied Scientist
Hagop Dippel
Applied Science Manager
Lalita Awasthi
Jr. ML Engineer
Shikhar Dev
Sr. ML Engineer
Zhe Nie
Sr. Applied Scientist
Jun 30
2025
From Event-Driven Chaos to a Blazingly Fast Serving API
In this post, we explain how we replaced an event-driven system with a high performance API capable of serving... Read more...
Conor Gallagher
Senior Principal Engineer
Giorgio Carta
Head of Engineering
Mar 07
2025
Scaling Beyond Limits: Harnessing Route Server for a Stable Cluster
A proxy server contributing to a stable Kubernetes cluster and scaling ingress controller. Read more...
Mustafa Abdelrahman
Software Engineer
Feb 17
2025
JSON Web Keys (JWK): Rotating Cryptographic Keys at Zalando
Secret rotation is a vital security measure in many contexts. Learn how we automate this process using JSON Web Keys... Read more...
Jan Brennenstuhl
Principal Software Engineer
Jan 21
2025
Introducing Lightstep Receiver for OpenTelemetry Collector
OpenTelemetry Lightstep Receiver helps you ingest traces generated by legacy Lightstep tracers in a simple way. Read more...
Konstantin Zhukov
Senior Software Engineer
Jan 21
2025