Job Description

River is hiring a Staff Software Engineer (Elixir) to join our engineering team. Focus on real-time Bitcoin and USD payments, trading, and settlement on an Elixir monolith with a unified GraphQL API. Contribute to Bitcoin custody with quorum signing, key ceremonies, and geo-redundant infrastructure. Involves scaling ML/AI systems (Python, PyTorch, XGBoost, LLMs) to automate operations and tackle fraud/risk. Part of a ground-up React/React Native consumer app rewrite. Port Lightning Network infrastructure from Go into Elixir. This senior role is hands-on and cross-functional, emphasizing reliability, security, and performance.