About Me
I'm Thejana — a DevOps enthusiast passionate about building scalable, secure, and automated infrastructure. With a strong foundation in cloud platforms, CI/CD pipelines, and infrastructure as code, I focus on delivering robust DevOps solutions that streamline development and deployment processes.
I have hands-on experience with tools like Jenkins, Docker, Ansible, Terraform, and GitHub Actions, and I actively work on projects that apply real-world DevOps principles. I enjoy problem-solving, automation, and optimizing workflows to improve system reliability and team productivity. My approach blends precision with curiosity, always aiming to bridge development and operations through seamless integration.
I'm currently seeking opportunities to contribute to modern DevOps teams where I can grow my expertise, collaborate with others, and work on impactful systems. Whether it's infrastructure automation, CI/CD orchestration, or monitoring solutions, I'm eager to take on challenges that accelerate delivery and elevate reliability.
Skills & Technologies
The DevOps Arsenal
CI/CD Tools
Continuous Integration and Deployment automation
Jenkins
AdvancedAutomation server for CI/CD pipelines
GitHub Actions
IntermediateCloud-native CI/CD platform
Containerization & Orchestration
Container management and orchestration platforms
Docker
ExpertContainerization platform
Kubernetes
IntermediateContainer orchestration system
Cloud & Infrastructure
Cloud platforms and infrastructure as code
AWS
AdvancedAmazon Web Services cloud platform
Terraform
IntermediateInfrastructure as Code tool
Ansible
IntermediateConfiguration management and automation
Scripting & Programming
Programming languages and scripting tools
Bash
IntermediateShell scripting and automation
Python
IntermediateProgramming language for automation
Monitoring & Observability
System monitoring and performance tracking
Prometheus
IntermediateMonitoring and alerting toolkit
Grafana
AdvancedAnalytics and monitoring platform
Security & Compliance
Security scanning and compliance tools
Trivy
BeginnerVulnerability scanner for containers
SonarQube
IntermediateCode quality and security analysis
Wazuh
BeginnerSecurity monitoring and threat detection
Source Control & Collaboration
Version control and team collaboration tools
Git
ExpertDistributed version control system
GitHub
ExpertGit repository hosting and collaboration
Web Servers & Networking
Web servers and networking infrastructure
Apache
IntermediateHTTP web server
Nginx
IntermediateWeb server and reverse proxy
Technology Overview
My Journey
Professional Experience
Freelance DevOps Engineer
Upwork
- ▶Actively learning client communication and proposal best practices for freelance DevOps work.
- ▶Seeking opportunities to deliver high-value solutions in Cloud Deployment and DevOps Automation.
FinTech DevOps Engineer
Dialog Axiata PLC
- ▶Monitored logs in production systems using AWS CloudWatch, troubleshooting issues to ensure system reliability, performance and post production support.
- ▶Integrated detailed transaction logging into the Genie application within the SDLC, allowing for the identification and resolution of 85% of previously unknown transaction errors.
- ▶Collaborated with senior engineers to create a Grafana dashboard, by adding new columns to the database, providing real-time insights into system metrics and performance.
- ▶Designed and developed a front end using React to send push notifications to Genie customers, enhancing user engagement and communication.
- ▶Contributed to modify the backend using Spring Boot, implementing new features and optimizing performance for the Genie app.
Education
Bachelor of Science Honours in Computer Science
Informatics Institute of Technology (IIT) - Affiliated with University of Westminster (UK)
- ▶Graduated with Upper Second Class Honours.
- ▶Completed the final year research project on the topic of 'Plant leaf recognition system using deep learning'.
Projects
Ideas, implemented.
MERN Application on Kubernetes
Deployed a full-stack MERN (MongoDB, Express, React, Node.js) application on a Kubernetes cluster using Minikube. The project demonstrates containerization with Docker and orchestration with Kubernetes, following industry best practices. Built and deployed frontend and backend as separate containers, and exposed services via Kubernetes.
AWS Resource Manager
Developed a lightweight and efficient Bash script to list various AWS resources across specified regions using AWS CLI. Ideal for quick audits, learning, and inventory management. Supports major AWS services like EC2, S3, IAM, Lambda, and more. Fully customizable, fast, and accepts user-defined inputs.
MERN Application on Docker Compose
Developed a full-stack MERN application using Docker Compose, allowing for easy containerization and deployment of the application. The project demonstrates the use of Docker Compose to manage multiple containers, including frontend, backend, and database, and how to configure them to work together.
Ansible Apache Setup
Developed an Ansible playbook to automate the setup of Apache web servers on multiple EC2 instances. The playbook ensures consistent configuration across all servers, making it ideal for initial server setup or system maintenance.
End-to-End CI/CD Pipeline for a Java Application
Implementing an end-to-end CI/CD pipeline for a Java-based application, following DevOps best practices for secure and scalable cloud deployment. The pipeline automates build and testing processes using Jenkins, Maven, and GitHub webhooks, with SonarQube integrated for static code analysis and quality assurance. The application is containerized with Docker and deployed to a Kubernetes cluster via Argo CD using a GitOps approach for version-controlled, repeatable deployments. Infrastructure was provisioned on an AWS EC2 instance, and Helm was used for managing Kubernetes manifests.
Certifications
My certification journey and progress
AWS Certified Cloud Practitioner
Amazon Web Services
Foundational understanding of AWS Cloud concepts, services, and terminology. Covers core AWS services, security, architecture, pricing, and support.
HashiCorp Terraform Associate
HashiCorp
Infrastructure as Code fundamentals and Terraform best practices. Covers configuration language, state management, and workflow automation.
Red Hat Certified System Administrator
Red Hat
Container orchestration and Kubernetes cluster administration. Covers deployment, scaling, networking, and troubleshooting containerized applications.
Recommendations
What my colleagues say about working with me
"I highly recommend Thejana Ravindu for their exceptional work as a DevOps intern, working with me on our team. He demonstrated strong skills in coding and log analysis using CloudWatch, significantly improving our development processes. Thejana is a dedicated and talented individual, and I am confident he will excel in their future endeavors."
Udani Punsandee
Senior DevOps Engineer at IFS R&D International
"I had the pleasure of working with Thejana during his internship at Dialog Axiata PLC, where he actively learned and applied skills in AWS and log monitoring. He utilized AWS CloudWatch to monitor our infrastructure, contributing to performance optimization and issue resolution. Additionally, he helped create Grafana dashboards, which provided valuable insights into our system metrics and enhanced our monitoring capabilities. I recommend Thejana for any position that requires skills..."
Kanishka Dissanayake
DevOps Engineer at Dialog Axiata PLC
"It is with great pleasure that I recommend Thejana Ravindu, one of my best friends and an exceptional colleague during our time at the University of Westminster. Thejana's expertise in Java, Object-Oriented Programming (OOP), and cybersecurity truly sets him apart. During our university years, Thejana consistently demonstrated his proficiency in Java and OOP. He has a natural ability to grasp complex concepts and apply them effectively in real-world scenarios. His..."
Charutha Wijayakoon
Co-Founder at BloxxWave
"I had the privilege of teaming up with Thejana during our university years, where we worked closely together on the same projects. He is a dedicated and passionate team member who consistently commits to group work. His knowledge and expertise in cybersecurity are impressive, and he is always willing to share his insights and help his colleagues. Thejana's ability to adapt to any condition and his commitment to teamwork make..."
Vihanga Hemachandra
Associate ABAP Consultant at Hayleys Advantis Limited
"I had the privilege of working alongside Thejana during his internship at Dialog Axiata PLC. During this time, he was actively engaged in learning and applying his skills in Java, Spring Boot, and SQL. Thejana contributed significantly to our backend development projects, utilizing Spring Boot to enhance the performance and scalability of our applications.Thejana demonstrated a strong aptitude for backend development tasks, showing a keen ability to optimize database queries..."
Danuka Bhathiya
Software Engineer at Dialog Axiata PLC
Get In Touch
Send a Message
Let's Connect
I'm always interested in discussing new opportunities, collaborating on projects, or sharing knowledge about DevOps practices.