Rasika Liyanaarachchi
Systems Engineer · DFIR Specialist · Infrastructure Security
About Rasika Liyanaarachchi
Rasika Liyanaarachchi is a dedicated infrastructure engineer with extensive hands-on experience in server management, security hardening, and performance optimization. With a security-first approach embedded in every deployment cycle, Rasika works across cloud orchestration, containerized workloads, and proactive threat mitigation to deliver resilient, always-on systems.
Technical Capabilities
Core Stack
- Server Administration (Linux / Windows)
- Cloud Infrastructure (AWS, GCP, DigitalOcean, Oracle, Alibaba)
- Containerization & Orchestration (Docker, Kubernetes)
- Observability & Monitoring (Grafana, Prometheus, VictoriaMetrics, Loki)
- Database Administration (MariaDB, PostgreSQL, MongoDB, MySQL, Redis)
- Network & Infrastructure Security
- Vulnerability Management (Identify, Protect, Detect, Respond, Recover)
- Digital Forensics & Incident Response (DFIR)
- Malware Removal & Website Recovery
- VoIP & Enterprise Mail Server Management
- Performance Optimization & Capacity Planning
- Web Development & SEO Optimization
Current Focus
Container Orchestration & DevOps
- Kubernetes cluster design, scaling & hardening
- Docker image optimization & multi-stage builds
- CI/CD pipeline architecture (GitHub Actions, GitLab CI, Jenkins)
- GitOps workflows & infrastructure as code
- Secrets management & supply chain security
Rasika Liyanaarachchi primarily works with Kubernetes and Docker to build and maintain production-grade container environments. Day-to-day work centers on designing reliable CI/CD pipelines, automating deployments, and keeping containerized workloads performant and secure at scale.
Side Interests & Hobbies
Security and Linux Tinkering
- Advanced Linux Architecture
- SOC Analysis & Proactive Threat Hunting
- FOSS Software Auditing & Script Validation
- Game Server Hosting & Late-Network Operations
Outside of work, Rasika enjoys digging into Linux internals, security research, and homelab experimentation - areas that naturally complement a career in infrastructure engineering.