DRDhahan Rathnayaka
@dhahanrathnayaka
DevOps engineer driving cloud automation, cost optimization, and reliability.
Sri LankaWhat I'm looking for
I am a results-driven DevOps engineer with four years of experience automating and optimizing mission-critical deployments across cloud and on-prem environments.
I have led Kubernetes deployments (GKE), built CI/CD pipelines with Jenkins, GitLab CI and ArgoCD, and managed infrastructure-as-code with Terraform, Ansible and Helm, while reducing monthly cloud costs by $30,000 through rightsizing and optimizations.
I focus on reliability, security and observability—implementing ELK, Grafana, Prometheus, Kubecost and CKA-level practices—while collaborating with development, QA and security teams to deliver scalable production systems.
Experience
Work history, roles, and key accomplishments
Associate Tech Lead - DevOps
PickMe
May 2023 - Present (2 years 7 months)
Managed Kubernetes deployments (GKE) and GCP managed/unmanaged instances, created CI/CD pipelines with Jenkins and ArgoCD, and led FinOps cost optimizations that reduced monthly cloud spend by $30,000.
Associate Systems and DevOps Engineer
Vizuamatix
May 2021 - Apr 2023 (1 year 11 months)
Owned six production systems and co-owned three major systems; provisioned Linux servers, implemented CI/CD with GitLab CI, and deployed monitoring platforms (Zabbix, ELK, Signoz) to improve observability and availability.
DPEngineering Trainee
Dialog Axiata PLC
Jul 2019 - Dec 2019 (5 months)
Completed internship in Technology Strategy and Access Network Planning, gaining hands-on exposure to network planning and development tasks within the engineering division.
Education
Degrees, certifications, and relevant coursework
General Sir John Kotelawala Defence University
Bachelor of Science (Hons), Electronics and Telecommunication Engineering
2017 - 2021
Activities and societies: Final year project: AI-Based Heart Monitoring System (heart sound and pulse monitoring using deep learning); IEEE publication.
Completed a BSc (Hons) in Electronics and Telecommunication Engineering from January 2017 to August 2021.
CLCoursera (deep learning.AI)
Certificate, Deep Learning
2020 - 2020
Completed the Deep Learning Specializations on Coursera in 2020.
Palo Alto Networks Academy
Certificate, Cybersecurity / Infrastructure
2020 - 2020
Completed the Terraform course from Palo Alto Networks Academy in 2020.
UMUniversity of Moratuwa
Certificate, Professional Certifications
2019 - 2019
Activities and societies: Courses listed: CCNA and other professional training (2019).
Completed short courses/certifications delivered by the University of Moratuwa in 2019.
NIBM
Advanced Certificate, English Language
2017 - 2017
Completed an Advanced Certificate in the English Language at NIBM in 2017.
Maliyadeva College Kurunegala
GCE Advanced Level, Secondary Education
2002 - 2015
Activities and societies: Advanced Level subjects: Combined Mathematics (A), Physics (B), Chemistry (C); General English (B).
Completed secondary education at Maliyadeva College Kurunegala from January 2002 to August 2015.
Availability
Location
Sri LankaAuthorized to work in
Job categories
Skills
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