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Entrylevel Java Backend Developer Jobs in Belleville, NJ

Ninth Wave

AI Java Developer

Manhattan, NY · On-site

Salary: $100,000 to $125,000 Ninth Wave AI Java Developer Full Time Opportunity New York City, NY ... You will build backend services that ingest bank-supplied artifacts (Postman collections, OAS ...

Ninth Wave

AI Java Developer

Manhattan, NY · On-site

$56.25 - $72.75/hr

Ninth Wave AI Java Developer Full Time Opportunity New York City, NY Job Summary We are hiring an ... You will build backend services that ingest bank-supplied artifacts (Postman collections, OAS ...

Staffingine LLC

Java Full Stack Developer

New York, NY · On-site

$57.50 - $74/hr

Java Full Stack Developer Job Location: New York City, NY Job Type: Contract * Full Stack ... Backend Strong proficiency in Java 8 Spring Framework and Spring Boot * Frontend Experience with ...

WFN Team Indus US Test Client 2

Java

Manhattan, NY · On-site

$56 - $72.25/hr

About the Role: The Java Developer will play a crucial role in designing, developing, and ... back-end and front-end tasks. Overall, a combination of these skills will facilitate effective ...

Jobsbridge

Mid Level Java Developer(Back-End)

Newark, NJ · On-site

$53.25 - $69/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. PL/SQL programming Oracle stored procedure and Java stored procedure ...

Jobsbridge

Mid Level Java Developer(Back-End)

Newark, NJ · On-site

$53.25 - $69/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Skills Required: PL/SQL programming Oracle stored procedure and Java stored ...

1 point system

Full-Stack Java Developer

New York, NY · On-site

$57.50 - $74/hr

* SVP level... strong hands-on developer who can help with scalability and latency * Looking to ... Strong back end development * Java, Spring Boot * Messaging system such as Kakfa (preferred), MQ

Linkup

Staff Backend Engineer

New York, NY · On-site

About the role We're looking for a top‑tier Staff Backend Engineer to join our tech team. You'll ... Java * PostgreSQL * OpenSearch * Vespa * Apache Storm * vLLM * Kubernetes * GitHub Actions

Linkup

Senior Backend Engineer

New York, NY · On-site

About the role We're looking for a top‑tier Backend Engineer to join our tech team and work ... Python * Java * PostgreSQL * OpenSearch * Vespa * Apache Storm * Kubernetes * GitHub Actions

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Entrylevel Java Backend Developer information

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How much do entrylevel java backend developer jobs pay per hour?

As of Jul 10, 2026, the average hourly pay for entrylevel java backend developer in Belleville, NJ is $55.56, according to ZipRecruiter salary data. Most workers in this role earn between $49.38 and $64.04 per hour, depending on experience, location, and employer.
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Entrylevel Java Backend Developer jobs near you
AI Java Developer

AI Java Developer

Ninth Wave

Manhattan, NY • On-site

Full-time

Re-posted 21 days ago

Job description

Salary: $100,000 to $125,000


Ninth Wave

AI Java Developer

Full Time Opportunity

New York City, NY

Job Summary

We are hiring an AI Java Developer to extend the Compass platform: a Spring Boot application backed by OpenSearch and AWS Bedrock that helps U.S. banks publish, monitor, and govern their open-banking / FDX data-sharing APIs. You will build backend services that ingest bank-supplied artifacts (Postman collections, OAS, configuration files), expose them through REST + Thymeleaf admin surfaces, and integrate LLM-driven assistance (Bedrock Knowledge Bases + Agents, RAG over our internal corpus) into the day-to-day operator workflow.

The role is hands-on Java + Spring Boot with meaningful GenAI integration work not a research role and not a pure prompt-engineering role. You'll own features end-to-end, from OpenSearch index design through Bedrock Agent wiring to the admin UI that exposes them.

Key Responsibilities

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

Required Skills & Qualifications

Technical Skills

  • 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
  • RAG architectures chunking, embedding, retrieval, citation
  • Vector databases
  • Cloud platform experience AWS, specifically:
    • Elastic Beanstalk (Compass deploy target not Kubernetes)
    • Bedrock (KB + Agents)
    • S3, IAM, CloudWatch
    • Multi-account Organization layout
  • Experience with Git, Maven, and CI/CD pipelines
  • Comfortable with relational and unstructured databases

Preferred Skills

  • Prior work in fintech / open banking / FDX / account-aggregation / payment-network connectivity or willingness to learn the domain fast.
  • 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

Educational Requirements

  • 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.