Jacek Ewertowski
Senior Software Engineer at Red Hat
Greater Poland Voivodeship
Summary
🤩
Rockstar🎓
Top SchoolJacek Ewertowski is a Senior Software Engineer with a decade of experience building and hardening cloud-native, high-performance distributed systems, currently working at Red Hat on service mesh and Envoy-related projects. He brings deep backend and DevOps expertise across Kubernetes, CRI, Kafka-based messaging, and observability stacks, having improved core functionality in prominent open-source projects like Envoy, Istio, Kuma and Hermes. Jacek pairs practical production experience (on-call, Terraform, AWS, container runtimes) with protocol- and performance-focused contributions—examples include HTTP/TCP proxy features, XFCC forwarding, and CRI refactors that removed external binary dependencies. Comfortable across languages and environments from Scala/Spark data pipelines to Kotlin and Python delivery services, he’s as likely to add Micrometer metrics as to reshape protobuf schemas. Notably, his open-source work shows a pattern of improving resilience and operability rather than just adding features, making systems easier to monitor and maintain at scale.
10 years of coding experience
5 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Politechnika Poznańska
German, English
Stackoverflow
1reputation
0reached
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Github Skills (47)
env10
service-mesh10
kubernetes10
envoyproxy10
messaging10
health-check10
command-line-interface10
kafka10
proxy10
container-runtime-interface10
zookeeper10
java10
http-proxy10
javas10
containerd10
Programming languages (14)
Github contributions (5)
allegro/hermes
Jul 2019 - Feb 2021
Fast and reliable message broker built on top of Kafka.
Role in this project:
Backend Developer
Backend DeveloperContributions:16 reviews, 40 commits, 67 PRs in 1 year 7 months
Contributions summary:Jacek primarily focused on enhancing the health check functionality within the Hermes management system. Their work included implementing and integrating health check metrics using Micrometer, which involved creating counters for successful and failed health checks. They also modified the system to utilize ephemeral nodes for health checks and updated the mode switching logic to read-only mode based on the health check results. These changes improved the system's resilience and monitoring capabilities.
brokermessage-queuehermesmessage-brokerreliable
istio/istio
Feb 2022 - Jan 2023
Connect, secure, control, and observe services.
Role in this project:Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:150 reviews, 16 commits, 76 PRs in 10 months
Contributions summary:Jacek has made several contributions related to the Istio service mesh, including removing unused code, simplifying ALPN protocols, and enabling outbound traffic tunneling. They were also involved in fixing tests, enhancing the functionality of the forward proxy configuration, and adding support for TCP idle timeout. Furthermore, the user addressed issues related to IPv6 compatibility and various test suite fixes.
circuit-breakerenforce-policiesistioapi-managementmicroservice
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