Senior AI-Powered Full-Stack Engineer

Cross River; United States; On-site; USD 150,000 - 200,000; Full time

Job summary

Cross River is seeking a Senior Software Engineer to build the AI‑powered surface of its data platform, spanning React front ends, Python APIs, relational and vector stores, and AWS services. You will design and ship LLM‑driven agents, RAG, and natural‑language data experiences in a secure, regulated environment.

The role requires fluency across the stack, strong problem‑solving, and a passion for delivering robust, secure software with data governance in mind.

Qualifications

• 5+ years of experience in software engineering, with a strong focus on full‑stack web and API development.
• Strong front‑end skills with React and TypeScript.
• Strong back‑end / API development skills in Python.
• Hands‑on experience building with large language models, such as integrating LLM APIs, agents, RAG, or other AI‑powered application features.
• Proven experience with AWS cloud environments (ECS, IAM, S3, and data services such as Glue, Athena, or Lake Formation).
• Strong experience with relational databases and SQL, plus Git for version control and review processes.

Responsibilities

• Design, develop, and maintain full‑stack software in support of Cross River's data platform.
• Build and operate AI‑native capabilities: LLM‑powered agents and reasoning loops, retrieval‑augmented generation (RAG) over the data catalog, and natural‑language‑to‑SQL query experiences.
• Integrate large language models responsibly, with rigorous permission checks, tracking, and observability on every model call.
• Act as a thoughtful and considerate data steward, with a mind for strong data security.
• Engineer React‑based web UIs that present complex data clearly and accessibly.
• Build and operate Python back‑ends that house APIs and integrate with the data platform and adjacent systems.
• Interact with AWS services and technologies including Lake Formation, Glue, Iceberg, Hive, Athena, ECS, and Snowflake.
• Operate and troubleshoot issues across the UIs, APIs, agents, and data pipelines.
• Collaborate with other software engineers, data engineers, data scientists, and business personnel to ensure business, security, and operational needs are met.
• Manage code and versioning effectively using Git and participate in architectural discussions on product‑and platform‑level designs.
• Ensure best practices around development, testing, and documentation.

Skills

React

TypeScript

Python

LLM integration

AWS

SQL

Git

problem solving

Tools

AWS

SQL

Git

Job description

Cross River is seeking a Senior Software Engineer to build the AI‑powered surface of its data platform, spanning React front ends, Python APIs, relational and vector stores, and AWS services. You will design and ship LLM‑driven agents, RAG, and natural‑language data experiences in a secure, regulated environment.

The role requires fluency across the stack, strong problem‑solving, and a passion for delivering robust, secure software with data governance in mind.