IOANNIS EVANGELIOU
ATHENS
Summary
Accomplished Platform engineer proffering extensive cloud monitoring, deployment and troubleshooting skills. Defined, built and maintained infrastructure using vendor-neutral platform-specific tools. Extremely invested on Kubernetes large ecosystem, currently having all 3 Kubernetes certifications from CNCF
Overview
12
12
years of professional experience
1
1
Certification
Work History
Cloud Infrastructure Engineer
Sitecore
01.2022 - Current
- Extensively used fluxcd as GitOps approach for continuous deployment. Designed multi-regional approach on github to facilitate deployment of existing Observability components and to make it easy onboard new. Designed and implemented migration of Prometheus and Thanos deployment from Ansible to Flux
- Maintained complicated infrastructure of more than 50 AKS clusters. Collaborated with cross-functional teams to tackle infrastructure issues related to Kubernetes. Took initiatives to propose and implement best practices to improve stability of applications.
- Maintained and enhanced monitoring solution consisting of Prometheus, Alertmanager, Grafana and Thanos. Provided through GitOps approach self-service solution across product teams to onboard their own Grafana Dashboards and Alerts
- Spearheaded initiatives aimed at driving continuous improvement in cloud infrastructure performance metrics. PoC with tools like Coroot, Robusta, Kubecost | Opencost, Retina with subsequent productization of a selected few.
- Setup Ingress-nginx and ExternalDNS in multiple AKS clusters. Troubleshooted complicated production issues of ExternalDNS and Cloudflare. Introduced automatic DNS creation in Azure Public DNS zones through its use.
- Provided technical guidance to junior engineers, fostering professional growth and enhancing team capabilities.
Mid Senior Devops Engineer
Omilia
06.2020 - 12.2021
- Dockerization of applications running as systemd services. Designed and implemented HA and multi-zone availability for DeepASR AI component.
- PCI compliance tasks. AMI hardening, WAF rules investigation, SonarQube configuration for NLU services, security auditing, Update docker images to meet security standards
- Streamlined infrastructure management through automation using industry-leading tools such as Ansible, Docker Swarm, and Terraform. Deployment in Azure and AWS cloud providers
DevOps Engineer
Agile Actors
02.2018 - 05.2020
- Maintaining more than 40 EC2 instances. Implemented Lambda functions in AWS Cloud Custodian for automatically powering them off during off-working hours
- Implemented db2 upgrade for more than 50 EC2 instances
- CI/CD with Jenkins. Setup automatic Jenkins jobs for Pulp, Artifactory and Jenkins Pipelines for cleanup.
R&D Engineer
Nokia
09.2014 - 01.2018
- Development on Python and C. Debugging and maintenance tasks. Testing with robot framework. Deployment using Jenkins of multiVM environments on Openstack and troubleshooting kubernetes clusters.
- Integration on Redis versions 3.2.10 and 4.0.0. Benchmark and provocative tests Redis on High Availability Cluster environment
- Implementation of python framework as a wrapper on Duplicity for back-up and restore snapshots and ldap data
- Implemented cloud logging solution using journal- upload/remote systemd services. Centralized log server logic that accepts logs from other VM – Openstack nodes
CRM Consultant
Cognity
06.2012 - 08.2014
- Evaluated emerging technologies in the market, recommending strategic investments that would enhance current CRM capabilities. Worked extensively with Siebel and Oracle RightNow CRM solutions
Education
Master of Science - Computer Science And Programming
University of Piraeus
08.2011
Skills
- Cloud Providers - AWS, Azure
- Containerization Technologies - Docker, Kubernetes
- Continuous Integration and Deployment - Jenkins , Gitlab, Github Actions
- Monitoring and Alerting - Prometheus, Grafana, Thanos, Mimir, ElasticCloud, Filebeat, APM, OpenTelemetry
- Scalability planning - K8s HPA, Keda Scalers , Azure VMSS
- Network configuration - Ingress Nginx, ExternalDNS, Kong API Gateway
Certification
- CKA - Certified Kubernetes Administrator
- CKAD - Certified Kubernetes Application Developer
- CKS - Certified Kubernetes Security Specialist
Languages
Greek
Native language
English
Proficient
C2
Spanish
Elementary
A2
French
Elementary
A2
Timeline
Cloud Infrastructure Engineer
Sitecore
01.2022 - Current
Mid Senior Devops Engineer
Omilia
06.2020 - 12.2021
DevOps Engineer
Agile Actors
02.2018 - 05.2020
R&D Engineer
Nokia
09.2014 - 01.2018
CRM Consultant
Cognity
06.2012 - 08.2014
Master of Science - Computer Science And Programming
University of Piraeus
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