Apache Kafka, Application Programming Interface (API), Best Practices, Billing, Capacity and Performance Management, Circuit Breakers, Cloud Computing, Code Reviews, Communication Skills, Continuous Deployment/Delivery, Continuous Integration, Cost Control, Customer Relations, Data Modeling, Express.js, GitHub, Incident Management, Incident Response, Information/Data Security (InfoSec), Jenkins, Leadership, Mentoring, Metrics, Microservices, MongoDB, MySQL, NoSQL, Node.js, OAuth, Pagination, Performance Tuning/Optimization, PostgreSQL, REST (Representational State Transfer), RabbitMQ, Redis, Reporting Dashboards, Risk Management, SSL-TLS (Secure Socket Layer - Transport Layer Security), SWAGGER OAS, System Architecture, Technical Leadership, Technical Writing, Telephone Triage, Topology, Traffic Shaping