CAP theorem VPN generative-based testing Git NSQd Domain-driven design MapReduce etcd DynamoDB Test-driven development Go Consul Docker Shell scripting Big data processing RDS EIP PostgreSQL Ubuntu XP Lean startup Linux Object-oriented programming Wireguard Lock services Raft AWS EC2 ELB QFD Route 53 MySQL Proven record of project leadership BASE architecture Bash 5S Memcached Scrum