11/24/2025 updated
AJ
100 % available
Senior DevOps Engineer & System Administrator
London, United Kingdom
Only remote
Overseas Family College (California State University), Singapore 2001-2002About me
20 years of experience in software development, devops, sre, architecture. Latest work: Built a large-scale Kubernetes Platform running 150,000+ containers, 6000+ nodes, and 100+ clusters including custom operators and infrastructure automation
PHPAmazon Web ServicesAutomationBash ShellCloud ComputingConfiguration ManagementDatabasesData MigrationDevOpsDisaster RecoveryPerl (Programming Language)HAProxyIcingaInfrastructure ManagementPython (Programming Language)
Kubernetes Platform Engineering
Large-scale Kubernetes platform development with 150,000 containers, 5000+ nodes, and 75+ clusters including custom operators and infrastructure automation
Cloud Infrastructure & DevOps
AWS cloud solutions, terraform infrastructure as code, CI/CD pipelines with Jenkins, and container orchestration for enterprise-scale deployments
System Architecture & Performance Optimization
Site reliability engineering, monitoring solutions with Graphite and Icinga, performance tuning, and disaster recovery implementation for high-availability systems
Programming & Scripting
Python development, PHP/NodeJS applications, custom bash and perl scripts, and API development for system integration
Database Management
MySQL cluster administration, Oracle database operations, data migration processes, and performance optimization for large-scale database systems
Monitoring & Alerting Systems
Implementation of comprehensive monitoring with Graphite, Icinga, Datadog, and custom alerting solutions handling millions of data points
Load Balancing & Caching
HAProxy configuration, Memcached implementation, custom caching solutions, and performance optimization for high-traffic applications
Configuration Management
Puppet automation, Ansible deployment, infrastructure provisioning, and configuration standardization across multiple environments
Large-scale Kubernetes platform development with 150,000 containers, 5000+ nodes, and 75+ clusters including custom operators and infrastructure automation
Cloud Infrastructure & DevOps
AWS cloud solutions, terraform infrastructure as code, CI/CD pipelines with Jenkins, and container orchestration for enterprise-scale deployments
System Architecture & Performance Optimization
Site reliability engineering, monitoring solutions with Graphite and Icinga, performance tuning, and disaster recovery implementation for high-availability systems
Programming & Scripting
Python development, PHP/NodeJS applications, custom bash and perl scripts, and API development for system integration
Database Management
MySQL cluster administration, Oracle database operations, data migration processes, and performance optimization for large-scale database systems
Monitoring & Alerting Systems
Implementation of comprehensive monitoring with Graphite, Icinga, Datadog, and custom alerting solutions handling millions of data points
Load Balancing & Caching
HAProxy configuration, Memcached implementation, custom caching solutions, and performance optimization for high-traffic applications
Configuration Management
Puppet automation, Ansible deployment, infrastructure provisioning, and configuration standardization across multiple environments
Experience
Professional experience10+ years
Freelancer since2025
Languages
EnglishNative speaker
Project history
Built and operated a large-scale, secure and compliant Kubernetes Platform for HSBC from the ground up covering Architecture, Engineering, Site Reliability Engineering throughout
Rotated across multiple projects responsible for running production infrastructure, scaling, monitoring, performance optimizations, development and supporting development teams
Started with 3 staff members and grown to over 80 staff, supporting 80 staff members internally including infrastructure, peer reviews, mentoring, recruitment and development