Samadi Nadun Witharana Appu
Technical Support & Systems Engineer
About Me
Technical support and Systems Engineer with 4+ years' experience supporting and monitoring Linux/Windows servers, cloud platforms (AWS, Azure), and enterprise networks.
Skilled in LAMP stack, cPanel, firewalls, and monitoring tools, with strong scripting knowledge (Bash, PowerShell). Proven ability to resolve incidents quickly with 98% SLA compliance and deliver 24x7 technical support.
Security-conscious, detail-oriented, and committed to system reliability. Passionate about optimizing infrastructure performance and automating system tasks to improve operational efficiency.
Quick Facts
- Location
- Newport, UK
- Experience
- 4+ Years
- SLA Compliance
- 98% Achievement Rate
- Specialization
- Cloud Infrastructure & Technical Support
- Education
- MSc Applied Cyber Security
Experience
Technical Support Systems Engineer
Providing comprehensive technical support for Linux/Windows servers, cloud platforms (AWS, Azure), and enterprise infrastructure. Managing VPN, DNS, firewalls, SSL installations, backups, patching, and upgrades while delivering 24x7 shift-based support.
Key Achievements:
- •Resolved 80% of incidents within 24h, boosting client satisfaction by 25% (Amazon, Apple)
- •Administered Linux/Windows servers, Azure & AWS, ensuring 98% SLA compliance
- •Managed VPN, DNS, firewalls, SSL installs, backups, patching, and upgrades
- •Delivered 24x7 shift-based support and documented processes for faster resolution
Systems Engineer
Maintained LAMP applications and trading platform infrastructure with load balancing and FIX protocol support. Automated system tasks and optimized server performance to reduce downtime and improve efficiency.
Key Achievements:
- •Maintained LAMP applications, load balancing (Nginx) & FIX protocol for trading platforms
- •Automated system tasks with Bash, reducing manual effort by 50%
- •Optimized server performance (CPU, RAM, disk/java) and reduced downtime by 20%
- •Managed critical financial trading infrastructure with high availability requirements
Systems & Network Administrator
Managed 100+ Linux/Windows servers across hybrid environments with 99.9% uptime. Oversaw firewalls, VPNs, backups, patching, antivirus, and monitoring systems while supporting and training 100+ users.
Key Achievements:
- •Managed 100+ Linux/Windows servers across hybrid environments (99.9% uptime)
- •Oversaw firewalls, VPNs, backups, patching, antivirus & monitoring systems
- •Supported and trained 100+ users on enterprise IT and hosting systems
- •Implemented comprehensive security and monitoring solutions
Skills & Certifications
Systems & Hosting
Cloud & Virtualization
Networking & Security
Monitoring & Support
Professional Certifications
Education
MSc Applied Cyber Security
Advanced studies in cybersecurity, network security, threat analysis, and security architecture.
BSc Computer Systems & Network Engineering
Comprehensive education in computer systems, network engineering, infrastructure management, and software development.
Key Projects
Founded and managed a complete web hosting company as a multi-year freelance venture for a Fiverr client in Australia. Led end-to-end project planning, infrastructure setup, and ongoing operations. Implemented enterprise-grade hosting control panels (cPanel, DirectAdmin) and billing automation systems (WHMCS, Blesta). Managed client relationships, technical support, server infrastructure, and business operations.
Successfully operated for several years with sustained client engagement through Fiverr platform, demonstrating long-term commitment, international client management, and comprehensive technical and business management capabilities
Key Technologies & Skills:
Delivered comprehensive technical support for enterprise clients including Amazon and Apple. Managed Linux/Windows servers, cloud platforms (AWS, Azure), and critical infrastructure with shift-based support model.
80% of incidents resolved within 24h, 25% boost in client satisfaction
Maintained high-availability LAMP applications and FIX protocol infrastructure for financial trading platforms. Implemented load balancing with Nginx and optimized server performance for critical trading operations.
20% reduction in downtime, 50% reduction in manual effort through automation
Managed 100+ Linux/Windows servers across hybrid environments for mobile solutions company. Implemented comprehensive security, monitoring, backup, and patching solutions while maintaining 99.9% uptime.
99.9% uptime achieved, 100+ users supported and trained
Developed Bash automation scripts to streamline system administration tasks and reduce manual workload. Optimized server performance including CPU, RAM, disk, and Java configurations.
50% reduction in manual effort, improved system performance
Administered AWS and Azure cloud environments ensuring 98% SLA compliance. Managed VPN configurations, DNS, firewalls, SSL installations, backups, and system patching across cloud platforms.
98% SLA compliance maintained, comprehensive cloud infrastructure management
Implemented security hardening measures, firewall configurations, IDS systems, and patch management processes. Ensured compliance with security standards and best practices across enterprise infrastructure.
Enhanced security posture, comprehensive patch management
Get in Touch
I'm always interested in discussing new opportunities, collaborations, or simply connecting with fellow professionals in the field. Feel free to reach out!
Phone
+44 7442 228830Location
Newport, UK