Alexander Demicev
Senior Site Reliability Engineer at Lambda
Brno, Southeast, Czechia
Summary
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RockstarAlexander Demicev is a Senior Site Reliability Engineer with nine years of experience building and hardening cloud-native infrastructure, currently focused on SRE at Lambda after senior engineering and principal roles at SUSE and Red Hat. He has deep hands-on expertise in Cluster API, OpenShift Machine API and vSphere integrations, contributing to high-profile open-source projects such as cluster-api and machine-api-operator where he added resource constraints, API conversions, tag reconciliation, and Ignition/bootstrap support. Comfortable across backend Go development and DevOps automation, he has improved CI, schemas and build tooling while reducing operational surprises through logging, schema tests and defensive defaults. Alexander combines production-focused engineering with thoughtful API evolution—ensuring AMI references, phase handling and resource limits are correct—reflecting an attention to both robustness and correctness. Based in Brno, he brings a pragmatic blend of systems thinking and developer ergonomics honed in large-scale, upstream open-source ecosystems.
9 years of coding experience
9 years of employment as a software developer
Russian, English, Czech
Github Skills (25)
kubernetes10
develop10
apidoc10
api-design10
cloud-infrastructure10
cicd10
automation10
go10
api10
kubernetes-pods10
cluster-api10
automations10
cloud-services10
operator10
resource-management9
Programming languages (15)
Github contributions (5)
openshift/machine-api-operator
Mar 2021 - Nov 2021
Machine API operator
Role in this project:
Back-end Developer
Back-end DeveloperContributions:81 reviews, 21 commits, 55 PRs in 8 months
Contributions summary:Alexander primarily contributed to the machine API operator, adding resource limits to pods. Their work involved modifying the `sync.go` file to include resource constraints for memory and CPU. They also made sure phase is always set before creation, with additional changes to ensure AMI references are made with ID and not other fields.
operator-sdkapioperatorkuberneteskubernetes-operator
kubernetes-sigs/cluster-api-provider-vsphere
Jan 2021 - Mar 2022
Role in this project:Backend Developer
Backend DeveloperContributions:9 reviews, 6 commits, 3 PRs in 1 year 2 months
Contributions summary:Alexander primarily contributed to the backend aspects of the `cluster-api-provider-vsphere` project, focusing on API enhancements and conversions between different API versions, specifically v1alpha3, v1alpha4, and v1beta1. They implemented tag reconciliation for virtual machines, and added support for the Ignition bootstrap format, including necessary modifications to kubeadm configuration. Furthermore, they updated the govmomi dependency and addressed potential issues related to tag attachment failures.
k8s-sig-vmwarecluster-apik8s-sig-cluster-lifecycle
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