AI Java Developer

Ninth Wave • New York, NY

12d • Onsite

About The Position

Ninth Wave is hiring an AI Java Developer for a full-time opportunity to extend the Compass platform. Compass is a Spring Boot application backed by OpenSearch and AWS Bedrock, designed to help U.S. banks publish, monitor, and govern their open-banking / FDX data-sharing APIs. In this role, you will build backend services responsible for ingesting bank-supplied artifacts such as Postman collections and OAS. You will expose these through RESTful interfaces with Thymeleaf admin surfaces and integrate LLM-driven assistance, including Bedrock Knowledge Bases and Agents, into the daily workflow of operators. This is a hands-on position focused on Java and Spring Boot development with significant GenAI integration, not a research or pure prompt-engineering role. You will have end-to-end ownership of features, from OpenSearch index design and Bedrock Agent configuration to the admin UI that makes them accessible.

Requirements

• Strong proficiency in Java 17+
• Spring Boot
• Spring MVC + Thymeleaf
• REST API design (JSON-in / JSON-out, paginated search endpoints, multipart upload)
• Microservices / service-oriented design within a single deployable
• Hands-on OpenSearch / Elasticsearch experience
• Experience integrating LLMs into Java applications via REST clients or SDKs (AWS Bedrock preferred)
• Understanding of RAG architectures (chunking, embedding, retrieval, citation)
• Experience with vector databases
• Cloud platform experience (AWS), specifically:
• Elastic Beanstalk (Compass deploy target)
• Bedrock (KB + Agents)
• S3, IAM, CloudWatch
• Multi-account Organization layout
• Experience with Git, Maven, and CI/CD pipelines
• Comfortable with relational and unstructured databases
• Bachelor's or Master's degree in Computer Science, Software Engineering, Artificial Intelligence, or related field, or equivalent demonstrable experience shipping production Java + GenAI systems.

Nice To Haves

• Prior work in fintech / open banking / FDX / account-aggregation / payment-network connectivity, or willingness to learn the domain quickly.
• Experience with Generative AI and LLM applications in production.
• Familiarity with Python for AI prototyping and one-off data tooling.
• Experience with AI security, prompt-injection defense, and data-privacy standards.
• Exposure to Postman collection parsing.
• Exposure to Atlassian APIs.

Responsibilities

• Design and develop services within the Compass Spring Boot codebase, including REST APIs, admin Thymeleaf views, and OpenSearch-backed data flows.
• Integrate AWS Bedrock (Claude family models, Knowledge Bases, Agents) into Java services to support RAG, summarization, and operator-assist features.
• Build and maintain ingestion pipelines to process bank-supplied artifacts (Postman collections, configuration YAML, FDX mapping spreadsheets) into structured OpenSearch documents.
• Configure OpenSearch indexing, tenant-scoped routing, and vector search for RAG retrieval.
• Implement CI/CD using existing GitHub-based pipelines, ensuring efficient build and deployment times.
• Optimize application performance, scalability, and security.
• Collaborate with the mappings team, the Bedrock / KB content team, and frontend / Thymeleaf maintainers to define and deliver features.
• Write clean, maintainable, and well-documented Java code, emphasizing small, focused commits and reversible changes.
• Stay current with advancements in the Java ecosystem and the GenAI tooling landscape.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior