Client-Side Load Balancing at a Million Requests Per Second
How we built an in-process client-side load balancer for a million requests per second of internal fan-out traffic,... Read more...
Conor Gallagher
Senior Principal Engineer
Jun 23
2026
Introducing Lightstep UQL to PromQL Translator
Automate telemetry query migration from Lightstep UQL to PromQL with this open-source Go SDK and Web UI. Read more...
Maksim Pershin
Software Engineer
Jun 08
2026
Rejecting Invalid Ingress Routes at Apply Time
How Zalando used Skipper as a validating admission webhook to reject invalid filters and predicates at apply time,... Read more...
Veronika Volokitina
Software Engineer
Apr 09
2026
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
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
OpenTelemetry for JavaScript Observability at Zalando
How Zalando improved observability for Node.js and web applications using OpenTelemetry Read more...
Mohit Karekar
Senior Software Engineer
Jul 29
2024
Node.js and the tale of worker threads
Join me on a Friday night on-call investigation into a rogue Node.js service. Read more...
Jeremy Colin
Engineering Manager
Jul 25
2024
End-to-end test probes with Playwright
Learn how we set up reliable automated end-to-end test probes for our Zalando website using Playwright Read more...
Jeremy Colin
Engineering Manager
Jul 19
2024
Failing to Auto Scale Elasticsearch in Kubernetes
A story of operational failure in large scale Elastisearch installation including the root cause analysis and... Read more...
Juho Vuori
Senior Software Engineer
Jun 21
2024