Kolitha Dasanayaka
Kurunegala
Summary
Senior DevOps Engineer with a strong background in managing scalable system infrastructures and implementing advanced CI/CD pipelines. Experienced in automation, operational optimization, and enhancing system performance in complex IT environments. Proven ability to lead cross-functional teams, streamline workflows, and drive efficiency through strategic process improvements and modern DevOps practices.
Overview
5
5
years of professional experience
1
1
Certification
Work History
Senior DevOps Engineer
Matific Sri Lanka
10.2024 - Current
- Demonstrated proficiency in leveraging AWS services such as ECS, EC2, S3, RDS, VPC, Lambda, and CloudFormation to build scalable, secure, and resilient cloud infrastructures.
- Extensive hands-on experience with Linux environments, including shell scripting, system troubleshooting, performance tuning, and security hardening.
- Proficient in configuring and maintaining Linux-based servers, ensuring reliable operation and efficient resource management.
- Proven expertise in container orchestration using Kubernetes, with a strong focus on deploying, managing, and scaling containerized applications.
- Designed and implemented continuous integration and deployment pipelines, streamlining application updates and minimizing downtime.
- Utilized tools such as Prometheus and Grafana to monitor system performance, ensuring optimal operation of both Linux and Kubernetes infrastructures.
Senior DevOps Engineer
Sysco LABS Sri Lanka
08.2023 - 10.2024
- Managed a fleet of Linux servers, automating routine maintenance tasks with shell scripts and configuration management tools.
- Led the migration of legacy applications to containerized environments, deploying and scaling microservices on AWS EKS and ECS.
- Provision AWS infrastructure using Terraform best practices.
- Automate infrastructure and deployments using Infrastructure as Code (IaC) principles.
- Provide infrastructure support for production issues, migration activities, and disaster recovery planning and implementation.
- Design and maintain CI/CD pipelines using Jenkins and AWS CodeBuild.
- Mentor and provide knowledge transfer (KT) to junior engineers within the team.
DevOps Engineer
Sysco LABS Sri Lanka
03.2022 - 08.2023
- Implement cost optimization, vulnerability fixes, and security hardening.
- Containerize applications using Docker and integrate with AWS services.
- Automate Windows Server AMI patching and deployment using Systems Manager Automation, CodeBuild, and Terraform.
- Design and implement Disaster Recovery (DR) plans for various projects.
Associate DevOps Engineer
hSenid Mobile Solutions
08.2021 - 03.2022
- Company Overview: Colombo, Sri Lanka
- Develop REST API with Python, Open API Specification, Swagger, Flask, and SQL Alchemy.
- Creating high availability DNS server using RedHat HA (Pacemaker/CoroSync/Virtual IP addresses).
- Designing and implementing high-availability clusters in an AWS environment for a system with microservices. (AWS EC2, Alma Linux, AWS virtual IPs, Pacemaker).
- Database Replication: MySQL master-master replication, MongoDB primary-secondary-arbiter setup.
- Configure Web Servers: Nginx as reverse proxy and Apache as Forward proxy Tomcat web servers and Java API applications.
- Hosted an S3 backend Harbor Docker registry in an EC2.
- Configured Node Exporter, and Grok Exporter with Prometheus and Grafana.
- Colombo, Sri Lanka
Trainee Clouds/DevOps Engineer
hSenid Mobile Solutions
07.2020 - 07.2021
- Company Overview: Colombo, Sri Lanka
- Worked with RedHat/Centos/Amazon Linux.
- Got familiar with RedHat High availability, Ansible automation, and Docker.
- Python Script for Firewall Automation.
- Worked on creating MOP for VA fixes.
- Deploying new releases to live production servers.
- Automated the deploying process using Ansible.
- Worked with Nginx, Apache web servers.
- Colombo, Sri Lanka
Education
BSc (Hons) - Information Technology, Computer Systems & Network Engineering
Sri Lanka Institute of Information Technology
Sri Lanka03.2022
Advanced Level Examination - Chemistry, Combined Mathematics, Physics
Wayamba Royal College
Sri Lanka01.2014
Skills
- Experienced in managing AWS and Azure environments
- Linux server administration: RedHat, Ubuntu, CentOS, Ubuntu, AlmaLinux
- Windows Server administration
- Experience managing containerized applications in AKS, EKS, and ECS
- Experience managing CICD tools: Jenkins, GitHub Actions, Azure DevOps, and Bitbucket Pipelines
- IAC-driven infrastructure deployment: Terraform, AWS CDK, CloudFormation
- Proficient in monitoring systems like Datadog, NewRelic, Prometheus, and Grafana
- Database management proficiency: MySQL, Oracle, PostgreSQL, MongoDB, MS SQL
- Proficient in networking principles
- Skilled in developing scripts with Python, Bash, and PowerShell
- Fluent in C, C, C#, Python, Java, Arduino, and Assembly
- Coordination of disaster recovery initiatives
Certification
AWS Certified Solutions Architect - Associate
Awards
- Best Performance Award at the Convocation 2022
- IET Student of the Year 2021
- Dean's List Awards for all 8 semesters (2018, 2019, 2020, 2021)
- 1st Place in NETCOM 2021 (Codefest 2021)
- 2nd Place in NETCOM 2019 (Codefest 2019)
- 3rd Place at TroubleshootMe 2020
- 2nd Place in CODECON Hackathon 2020
Publications
i-Police - An Intelligent Policing System Through Public Area Surveillance, 2021 IEEE 12th Annual Information Technology, Electronics and Mobile Communication Conference (IEMCON), Vancouver, BC, Canada, 2021, 10.1109/IEMCON53756.2021.9623145
References
- Rajitha Jayasekara, Portfolio Lead - Cyber Security, Novigi Pty Ltd, rajitha1114@gmail.com, +94772201800
- Dr. Anuradha Jayakody, Professor, Sri Lanka Institute of Information Technology, anuradha.j@sliit.lk, +94117544801
Disclaimer
Hereby, I truly and sincerely state that all the above information furnished by me is true and correct to the best of my knowledge.
Languages
- English
- Sinhala
Career Overview
Results-driven DevOps Engineer with over 4 years of hands-on experience in designing, automating, and managing cloud infrastructure across AWS and Azure. Demonstrated expertise in Infrastructure as Code (IaC) using Terraform and Ansible, containerization with Docker, and implementing CI/CD pipelines to accelerate software delivery. Skilled in enhancing system reliability, optimizing performance, and driving operational efficiency through automation and robust DevOps practices. Adept at collaborating with cross-functional teams to deliver scalable, secure, and high-availability solutions. Committed to continuous improvement and innovation to meet evolving business and technical demands.
Timeline
Senior DevOps Engineer
Matific Sri Lanka
10.2024 - Current
Senior DevOps Engineer
Sysco LABS Sri Lanka
08.2023 - 10.2024
DevOps Engineer
Sysco LABS Sri Lanka
03.2022 - 08.2023
Associate DevOps Engineer
hSenid Mobile Solutions
08.2021 - 03.2022
Trainee Clouds/DevOps Engineer
hSenid Mobile Solutions
07.2020 - 07.2021
BSc (Hons) - Information Technology, Computer Systems & Network Engineering
Sri Lanka Institute of Information Technology
Advanced Level Examination - Chemistry, Combined Mathematics, Physics
Wayamba Royal College
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