CPU Busyi
2.6% AVAILABLE FOR PLATFORM & RELIABILITY WORK · COLOMBO, LK
Systems made reliable
I design, automate, and operate cloud platforms from resilient OpenShift environments to calmer, more observable delivery workflows.
ALL SERVICES NORMALUTC+05:30
OBSERVABILITY
Signals before
surprises.
PressureNormal
APIHealthy
App4 / 4
DatabaseReady
BackupsVerified
Sys Loadi
0.42RAM Usedi
48.1%SWAP Usedi
4.0%Root FS Usedi
61.0%CPU Coresi
4Uptimei
18d 06hCPU Basic%
12:0014:0016:0018:00now
Memory BasicGiB
12:0014:0016:0018:00now
Network Traffic Basickb/s
12:0014:0016:0018:00now
Disk Space Used Basic%
12:0014:0016:0018:00now
SELECTED DEPLOYMENTS
Work that holds up
when it matters.
01 PRODUCTION
OpenShift Platform Engineering
Built resilient cluster environments, backup paths, storage, and operational guardrails for global client workloads.
02 LAB
Homelab / gajan.dev
A personal learning platform for running Kubernetes workloads, observability, and cloud delivery experiments.
03 LIVE
Zelvo
Receipt-aware expense tracking application deployed with a practical cloud delivery stack.
04 CLIENT
NuBred
Agriculture and plant variety management system delivered with a modern web and cloud stack.
05 BUILD
NoteMate
AI-powered note taking platform combining voice processing, cloud services, CI/CD, and observability.
PRODUCTION TROUBLESHOOTING
Prepared beats
heroic.
Release safety
Coordinated production releases and major-version upgrades with test plans, impact analysis, and documented rollback thinking.
Fast recovery
Automated patching and migration work with CI/CD and Ansible, reducing manual execution from hours to seconds.
Reliable platforms
Implemented monitoring, health checks, backups, and disaster-recovery approaches across clusters and databases.
Cluster delivery
Provisioned single-node, multi-node, on-premises, and K3s OpenShift environments for research, demonstrations, and client deployments.
Storage and migration
Managed VMware cold and warm migrations, LVM, local storage, Ceph, Rook, NFS, PVC mapping, and network bonding.
Observability and health
Built Prometheus and Grafana monitoring with Node, MySQL, and YugabyteDB exporters, automated health checks, log management, and image pruning.
Backup and recovery
Automated cluster, database, and namespace backups with Velero and MinIO, then shaped disaster recovery procedures around those paths.
Security hardening
Configured network policies, HAProxy, MITM servers, routes, DNS entries, ACLs, and security rules for safer platform access.
EXPERIENCE
Four years of
systems thinking.
DevOps / Systems Engineer
hSenid Mobile Solutions
Associate DevOps / Cloud Engineer
hSenid Mobile Solutions
DevOps & Backend Engineering
hSenid Mobile Solutions · appiGo · IntendAble
OPERATING STACK
BashLinuxRHELMongoDBPythonMySQLOpenShift VirtualizationVMwareKubernetesDockerCI/CD PipelinesAWSGCPRookCephAnsiblePrometheusGrafanaCloudflareHelmVeleroMinIOGitOpsWeb App SecurityOSINTNode.jsExpressMongoose
CERTIFICATIONS
- Advent of Cyber 2025TryHackMe · 2025
- Red Hat System Administration I (RH124), Version 10.0Red Hat · 2025
- Red Hat Certified OpenShift AdministratorRed Hat · 2025
- Back End Development and APIsfreeCodeCamp · 2024
- Containers & Kubernetes EssentialsIBM · 2024
- Advent of Cyber 2023TryHackMe · 2023
- SQL (Intermediate)HackerRank · 2023
- Python (Basic)HackerRank · 2023
- AWS Educate Introduction to Cloud 101AWS · 2023
- The Complete Web DeveloperZero to Mastery Academy · 2021
- JavaScript Algorithms and Data StructuresfreeCodeCamp · 2020
- Responsive Web DesignfreeCodeCamp · 2020
- Diploma in Web DevelopmentESOFT Metro Campus · 2019
- Diploma in Information TechnologyESOFT Metro Campus · 2018
TECHNICAL WRITING
Make operations
repeatable.
FIELD NOTE / 001
Operational docs that shorten the path from alert to action.
Procedure writing, knowledge transfer, deployment notes, and impact analysis are part of the system, not an afterthought.
Request a writing sample →