Hello, I'm

Konstantinos Gkekas

Senior Cloud Operations Engineer

6+ years turning cloud complexity into reliable, secure infrastructure that teams can depend on. From automating AWS deployments at scale to building self-healing systems and production Kubernetes platforms, I help organisations ship faster while keeping their infrastructure resilient and cost-efficient.

Get in Touch View My Work
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Experience

Senior Cloud Operations Engineer

Mastercard Feb 2025 – Present
  • Design and implement AWS-based solutions using Terraform, managed through GitLab CI/CD pipelines
  • Provision and manage EC2, security groups, Route53, load balancers, KMS, SSM parameters, and ECS clusters
  • Own IAM permissions management ensuring secure and compliant access controls across environments
  • Support configuration management using Puppet, with Consul and Vault for service discovery and secrets
  • Active in monitoring and observability with SignalFx; participate in rotating on-call schedule
  • Manage S3 storage, troubleshoot infrastructure issues, and continuously improve DevOps practices

Infrastructure Engineer / DevOps Engineer

Make Jan 2022 – Feb 2025
  • Hands-on AWS experience: Auto Scaling, Load Balancer, EC2, RDS, EFS, Route53, VPC, and Lambda
  • Managed Kubernetes and Docker clusters for scalable, reliable application deployment
  • Infrastructure as Code with Terraform; CI/CD automation with Git, GitHub, CircleCI, and GitHub Actions
  • Monitored cloud infrastructure using Datadog with alerting, logging, and dashboards
  • Application packaging, deployment, and containerization via Helm
  • Database management with PostgreSQL and MongoDB Atlas; ElasticSearch and RabbitMQ
  • Networking and troubleshooting: TCP/IP, DNS, firewalls, LAN/WAN, Traceroute, Wireshark, cURL

Cloud Engineer

NTT Ltd. Feb 2021 – Dec 2021
  • Provided customer support for Cloud Infrastructure across Linux (SUSE, RedHat) and Windows servers
  • Automation with Jenkins, Ansible, and AWX; monitoring with Grafana and Icinga
  • Storage management with NetApp; backup with Commvault and SnapManager
  • VMware server management through vSphere Client; update management with SUSE Manager and RH Satellite

MS Services Engineer L1

NTT Ltd. Sep 2019 – Feb 2021
  • Microsoft Azure administration tasks and cloud environment support
  • Provisioned cloud servers and configured backup solutions
  • Backup administration with Commvault for Windows, Linux, Oracle, and SAP HANA
  • Managed restore tasks and troubleshooting across Windows and Linux systems

Technical Skills

AWS Cloud

EC2 ECS EKS S3 RDS EFS Lambda Route 53 VPC IAM KMS SSM Auto Scaling Load Balancer CloudFront

Infrastructure as Code

Terraform Puppet Ansible Consul Vault

CI/CD & DevOps

GitLab CI/CD GitHub Actions CircleCI Jenkins Docker Kubernetes Helm

Systems Administration

Linux SUSE RedHat Windows Server VMware Bash

Monitoring & Observability

Datadog SignalFx Grafana

Databases & Messaging

PostgreSQL MongoDB Atlas DynamoDB RabbitMQ

Certifications

AWS Certified Solutions Architect

Amazon Web Services

Issued: Dec 2025 · Expires: Dec 2028

HashiCorp Certified: Terraform Associate (003)

HashiCorp

Issued: Feb 2025 · Expires: Feb 2027

AWS Cloud Practitioner

Amazon Web Services

Issued: Mar 2023 · Expired: Mar 2026

Microsoft Certified: Azure Administrator Associate

Microsoft

Issued: Mar 2021 · Expired: Mar 2024

Microsoft Certified: Azure Fundamentals

Microsoft

Issued: Jul 2020

Cisco CCNA Routing and Switching

Cisco

Issued: Feb 2020 · Expired: Feb 2023

Education

Bachelor's Degree in Computer Systems Networking and Telecommunications

Technological Educational Institute of Western Macedonia

2006 – 2011

Projects

Cloud Resume

This website! Full-stack serverless resume on AWS — S3, CloudFront, Route 53, ACM, Lambda visitor counter, DynamoDB, API Gateway, Terraform IaC, and GitHub Actions CI/CD with OIDC authentication.

AWS Terraform Python GitHub Actions OIDC

Production EKS Platform

Production-ready AWS EKS infrastructure with Terraform modules for VPC, node groups, ALB Controller, ExternalDNS, ArgoCD GitOps, and a full observability stack (Prometheus, Grafana, Loki, Tempo). Includes CI/CD with Infracost.

EKS Terraform ArgoCD Prometheus Helm

Self-Healing Infrastructure

Event-driven auto-remediation for AWS — EC2 recovery, RDS failover, ECS task restart, ALB unhealthy target handling, and orphaned resource cleanup using EventBridge, Lambda, Step Functions, and SNS alerting.

EventBridge Lambda Step Functions Terraform Python

Portfolio Website

Personal portfolio site hosted on S3 with CloudFront CDN, Terraform IaC for infrastructure, automated deployment scripts, and smart cache header management.

S3 CloudFront Terraform Bash

Get in Touch

I'm always interested in discussing cloud infrastructure, DevOps practices, and new opportunities. Currently based in Prague, Czechia. Feel free to reach out!

konstantinos.gkekas.1@gmail.com LinkedIn Profile GitHub Profile