Senior Back-End Engineer Node.js

Description:

We are

At Cross River, we're building the financial infrastructure that powers global innovation. With our cutting-edge suite of embedded payments, cards, and lending solutions, we enable millions of businesses and consumers to transact seamlessly and securely. 

With 900+ employees worldwide and an R&D center of over 160 employees in Jerusalem - we’re reshaping how financial technology is developed and delivered. . 

We are looking for a Senior Full Stack Engineer who thrives at the intersection of intelligent systems and polished product experiences. You'll work across the entire stack from designing React interfaces that surface AI capabilities to engineers and end users, to building the Python and Node.js services that power our LLM-based Agentic platform. A key part of this role is hands-on experience with designing, building, and integrating MCP servers that connect our AI agents to internal tools, financial data systems, and third-party APIs. You'll collaborate closely with product, compliance, and cross-functional engineering teams to build financial technology that's fast, secure, and genuinely intelligent.

• You have experience building Retrieval‑Augmented Generation (RAG) systems or knowledge‑base chatbots.
• You're Hands‑on with vector databases such as Pinecone, Chroma, or pgvector on Postgres/Aurora.
• Have AWS certification (Developer, Solutions Architect, or Machine Learning Specialty).
• Experience with observability tooling (Datadog, New Relic) and cost‑optimization strategies for AI workloads.
• Background in microservices, domain‑driven design, or event‑sourcing patterns.