Jananath Banuka

Platform Engineer & DevOps Specialist

Kubernetes (CKA/CKS)AWSAzureGCPTerraform

Crafting scalable cloud infrastructure and automation solutions with 5+ years of experience in platform engineering and DevOps practices.

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About Me

I'm a DevOps Engineer with 5+ years of experience in cloud infrastructure and platform engineering. I specialize in creating scalable, automated solutions using Kubernetes, AWS, Azure, and modern DevOps practices to solve complex deployment challenges.

Platform Engineering

Expert in building scalable developer platforms

Cloud Native

Multi-cloud architecture and containerization

Automation

Infrastructure as Code and CI/CD pipelines

Education

BSc. (Hons) Software Engineering

Sri Lanka Institute of Information Technology

Sri Lanka

2017 - 2021

Second Class (Upper)

Dean's List (3X) - GPA > 3.75/4.0

Software Engineering principles

Academic excellence recognition

🏆 Certifications

CKA - Certified Kubernetes Administrator

CKS - Certified Kubernetes Security Specialist

Skills & Technologies

Cloud Platforms

AWS ServicesAzureGCP

Container Orchestration

KubernetesDockerHelmStackstorm

Certifications: CKA, CKS

DevEx & IDPs

Backstagen8n

Infrastructure as Code

TerraformCloudFormation

CI/CD & GitOps

GitOpsGitLab CI/CDGitHub ActionsAzure DevOpsJenkins

Monitoring & Observability

OpenTelemetryPrometheusGrafanaDataDog

Scripting & Databases

Bash/PythonMySQLMongoDB

Languages

English (Fluent)Sinhala (Native)

Experience

Platform Engineer

Digital Charging Solutions GmbH, Munich, Germany

Munich, Germany

July 2023 - Present

Led the rollout of a customized Backstage Internal Developer Portal (IDP), enabling golden paths and self-service, improving developer onboarding and productivity

Built and maintained custom Backstage plugins for streamlined access to CI/CD, Azure resources, and development tools — reducing dev on-boarding and context switching

Integrated Azure DevOps into the IDP for real-time visibility into pull requests, Kubernetes deployments, and service health

Architected Business Continuity (BC) and Disaster Recovery (DR) strategies for critical Azure services, including geo-redundant Function Apps and high-availability Redis

Set up and maintained DORA Metrics to support engineering performance tracking and incident response (deployment frequency, lead time, MTTR, change failure rate)

Designed scalable Azure DevOps pipelines using Helm to standardize Kubernetes deployments across environments

Led the adoption of OpenTelemetry, with auto-instrumentation for Java applications and a unified observability stack using Prometheus, Loki, Grafana, and the ELK stack

Deployed self-hosted n8n on Kubernetes with Helm, built custom nodes, and created AI-powered workflows (e.g., RAG-based cloud compliance tools)

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DevOps Engineer

e-bot7 GmbH, Munich, Germany

Munich, Germany

May 2022 - July 2023

Led and maintained highly available, production-grade Kubernetes clusters for 100+ customers

Built and managed GitOps projects for automated app delivery to cloud Kubernetes environments

Developed modular Terraform code for infrastructure provisioning and multi-cluster deployments

Implemented monitoring using Grafana, Prometheus, and Elasticsearch for microservices on Kubernetes

Applied a security-first approach with container image scanning and vulnerability detection in CI/CD

Led infrastructure migrations to adopt modern cloud-native capabilities

Created internal dashboards using Python and Terraform, deployed via CI/CD to Kubernetes

Built reusable GitHub composite actions to automate CI/CD workflows for developer teams

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System Engineer - DevOps

WSO2, Sri Lanka

Sri Lanka

July 2021 - July 2022

Designed and automated Azure DevOps pipelines for customer infrastructure provisioning using Terraform

Automated backups, routine audits, and troubleshooting to ensure system reliability

Led system performance tuning and ensured fault tolerance of deployments

Integrated new technologies into existing data center environments to improve capabilities

Automated system updates, patches, and configuration changes for faster, consistent deployments

Developed CloudFormation scripts and automated configuration management with Puppet modules

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DevOps Engineer

iTelasoft, Sri Lanka

Sri Lanka

Dec 2020 - July 2021

Provisioned and maintained AWS ECS (EC2 and Fargate) clusters across multiple environments using Terraform

Integrated DataDog for comprehensive Application Performance Monitoring (APM)

Led zero-downtime migration from Beanstalk to ECS Fargate

Developed and maintained automated smoke tests using Allure, CodeceptJS, Docker, and GitLab CI/CD

Built status pages deployed on Fargate, integrated with DataDog APM

Implemented GitLab CI/CD pipelines for static code analysis with SonarQube in Docker

Configured AWS Session Manager to improve local development workflows for teams

Automated issue tracking by integrating DataDog with Trello for incident card creation

Applied security best practices by setting headers on frontend apps via CloudFront and Lambda@Edge

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Cloud Operations/SRE Engineer Intern

Pearson Lanka, Sri Lanka

Sri Lanka

Aug 2019 - Aug 2020

Maintained 14+ next-gen educational apps on a Kubernetes-based PaaS using AWS, Terraform, Ansible, StackStorm, Jenkins, GitLab CI/CD, Helm, and Consul

Automated TLS certificate deployment to AWS Secrets Manager using GoLang, reducing errors and saving time via GitLab CI/CD

Developed Bitesize-Troubleshooter, a Python-based Kubernetes vulnerability scanner that cut incident resolution time from hours to minutes

Collaborated with dev teams to automate CI/CD pipelines using Jenkins and GitLab CI/CD on a self-hosted Kubernetes platform

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Featured Projects

⚙️

1. Kubernetes Setup with GitLab CI/CD

TerraformAWSGitLab CI/CD

Automated K8s cluster deployment using kubeadm, Terraform (AWS/GCP), and Ansible. Features GitLab CI/CD with multiple executor types, Prometheus/Grafana monitoring, NFS storage, and Helm-deployed test applications.

🔧

2. Writing Kubernetes Operators

GoLangTerraformAWSKubernetes

Custom K8s operators in GoLang deployed via Jenkins to monitor object lifecycles and automate event-driven actions across cluster resources.

🔗 View Project

⚡

3. Kubernetes-the-easy-way

TerraformAWSGitLab CI/CD

Automated Kelsey Hightower's "kubernetes-the-hard-way" using Ansible and GitLab CI/CD. Complete pipeline handles binary downloads, certificate generation, and cluster setup with self-hosted runners.

🔗 GCP Version 🔗 AWS Version

🏗️

4. Effi Enterprise Offering

TerraformAWSGitLab CI/CD

Complete enterprise PaaS solution with Terraform and GitLab CI/CD. Features S3/CloudFront frontend hosting and secure Fargate backend clusters for scalable deployments.

📊

5. "Open Project" Project

AWS LambdaAWS ECS/FargateGitLab CI/CD

Project management tool for 100+ employees on AWS ECS Fargate. Achieved 45% cost reduction through automation with Lambda, spot runners, and optimized practices. Managed Bitbucket pipelines for mobile backends.

🔒

6. Security Enhancements

AWS WAFTrusted AdvisorCloudTrailFargateGitLab CI/CD

Multi-layered security for microservices using WAF, Lambda Edge, and Trusted Advisor. Automated OWASP ZAP penetration testing and implemented Azure security best practices with significant score improvements.

💰

7. Cost Optimization

AWS S3RDSCloudTrailECSGitLab CI/CD

Comprehensive cost optimization with billing alerts, Trusted Advisor recommendations, and automated backups. Enhanced security with CloudTrail, Systems Manager, and DataDog monitoring for ECS resources.

🚀

8. Production Migration

AWS RDSEC2

Led production migration for WSO2's largest customer (25,000+ users). Conducted multiple trial runs before successful production cutover with complete validation and handover.

🛠️