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teddyopsdev

Teddy

@teddyopsdev

Linux System Administrator DevOps and Server Security Expert

Hong Kong
English, Chinese
About me
I am a Linux System Administrator focused on stable, high-performance infrastructures. Technical Competencies: - Infrastructure: Advanced Linux Admin, Kernel Tuning, Security Hardening. - Networking: Nginx Reverse Proxy, Firewall, Traffic Engineering. - Network Services: Expert setup of Derp, Sing-box, FRP, and custom tunneling. - Container & Data: Docker, Kubernetes clusters, SQL/NoSQL performance tuning. I deliver precise, clean, and maintainable configurations. Highly adaptable to your specific stack needs. Let's optimize your system.... Read more

Skills

t
teddyopsdev
Teddy
Offline • 

See my services

Security
I will perform professional linux server hardening and secure docker deployment
From$20 / projectMore details

Work experience

CLOUD_DEV

Network Infrastructure Consultant

CLOUD DEV • Self-employed

Jul 2024 - Dec 2025 • 1 yr 5 mos

Architected and maintained high-performance network infrastructures using Docker, with a focus on containerized deployment and efficient lifecycle management. Led the design and implementation of advanced network tunneling and proxy architectures, integrating Sing-box (VLESS-Reality, Hysteria2, GRPC, WS, XHTTP) and FRP for robust, multi-node load balancing across diverse geographical regions. Engineered secure, low-latency remote connectivity ecosystems by deploying and managing Tailscale and Derp mesh networks, significantly reducing cross-region access barriers for distributed operations. Performed comprehensive Nginx reverse proxy optimization, focusing on request throughput and caching strategies to support high-traffic web platforms. Implemented rigorous security hardening protocols, including automated SSL/TLS certificate management, firewall configuration, and intrusion mitigation scripts to ensure consistent system stability and minimize operational risks. Provided ongoing technical consultation and rapid troubleshooting, ensuring operational continuity for mission-critical digital assets.

IT_Force

DevOps & Systems Engineer

IT Force • Part-time

Apr 2022 - Dec 2023 • 1 yr 8 mos

Served as a part-time DevOps and Systems Engineer, providing critical infrastructure support and maintenance for internal server environments. Assisted in the containerization of legacy web applications using Docker, which streamlined deployment processes. Monitored Linux server performance and optimized system resources to ensure service stability. Authored technical documentation and maintenance scripts (Bash) for routine security patching and firewall management. Collaborated with the core team to troubleshoot network connectivity issues and improve server uptime during peak load periods.