Staff Software Engineer (Elixir)

Staff Software Engineer (Elixir) at River. Working on real-time Bitcoin and USD payments, trading, and settlement on an Elixir monolith with a unified GraphQL API; next-generation Bitcoin custody with quorum signing, key ceremonies, and geo-redundant infrastructure; scaling ML/AI systems (Python, PyTorch, XGBoost, LLMs); React and React Native consumer app; and Lightning Network infrastructure.