- Distributed Systems - DDD / CQRS / Event Sourcing - Erlang/OTP, Elixir/Phoenix/Absinthe/LiveView, Elm - kdb+/q - GraphQL, MQTT, Pub/Sub, WebSockets, Long Polling, etc. - PostgreSQL, Redis, DynamoDB, Riak - AWS / GCP - GPU Computing (OpenCL, CUDA) - Agent-based Modeling/Simulations (ABM), NetLogo