ZipRecruiter

Log In

1

Freelance Java Backend Developer Jobs in Flemington, NJ

InfoVision, Inc.

Java Backend Developer

Bernardsville, NJ

$52.25 - $67.75/hr

... Java Developer to join a high-impact engineering team supporting enterprise-scale backend platforms for a leading telecommunications client in Dallas, TX. In this role, you will design and operate ...

FreshDirect

Sr. Java Backend Developer

Woodbridge, NJ · On-site

$130K - $155K/yr

What You'll Do As a Senior Backend Developer (Java) , you'll help design, develop, and scale backend systems that power FreshDirect's e-commerce and logistics platforms. You'll collaborate with cross ...

FreshDirect

Sr. Java Backend Developer

Woodbridge, NJ

$130K - $155K/yr

What You'll Do As a Senior Backend Developer (Java) , you'll help design, develop, and scale backend systems that power FreshDirect's e-commerce and logistics platforms. You'll collaborate with cross ...

Kasmo Global

Java Developer

South Plainfield, NJ

$53.25 - $69/hr

Top 3 Must Haves: 1. Core Java 2. Any one DB 3. Micro Services, Spring and Spring Boot Job Summary: • Lead Java Backend engineer with good hands on experience (8 to 10+ years) in Java • Core Java ...

Genesis10

Senior Java Backend Engineer

Pennington, NJ · On-site

$121K - $158K/yr

Genesis10 is currently seeking a Senior Java Backend Engineer for a contract position with a Global ... DevOps practices • Experience working in large-scale enterprise or fintech systems Company

Judge Group, Inc.

Back-end Developer - V

Bedminster, NJ

$122K - $159K/yr

Our client is currently seeking a Back-end Developer - V Senior Back-end Developer (Java) Contract!W2 This job will have the following responsibilities: * We are seeking a highly skilled Senior ...

Syntricate Technologies

Java Developer

Princeton, NJ

$53.50 - $69.25/hr

Developer with 10+ years of development (Java) background Designing and developing applications using the Java EE platform Experience in Java back end services Experience with Java EE components ...

PKR

Senior Java Backend Engineer

Philadelphia, PA · Remote

$10 - $100/hr

What Our Client Needs A Senior Java Engineer to design, build, and scale cloud-native services that ... and DevOps teams to improve CI/CD and observability • Participate in code reviews, design ...

VBeyond

Backend Engineer (Java + Golang)

Madison, NJ

$52 - $67.50/hr

Role: Backend Engineer (Java + Golang) Location: Madison, NJ - Prefer locals Type: Contract ... Cloud DevOps Extensive experience with public cloud platforms such as AWS GCP or Azure including ...

NATIONMIND LLC

Staff Engineer I Java

Somerville, NJ · Remote

$56 - $60/hr

We are currently hiring skilled professionals for Staff Engineer I (JAVA) to join our growing team ... Define backend architecture standards, design patterns, and best practices for workflow-centric ...

Mirai, LLC

Full Stack Java Developer

Philadelphia, PA · On-site

$53 - $68.25/hr

The Developer will be part of a product team of designers and full-stack developers (Java back-end) developing a web and mobile application for use by the Front Line Associates & Managers in the ...

MM International

Java Developer - Backend /Angular

Iselin, NJ · On-site

$51.25 - $66.50/hr

Software Engineer ( Backend) Location: Hybrid 3 times a week in Iselin, NJ. Onsite Interview IV ... Angular (2.0/4.0+) * Core Java * Object Orientation * Spring (Spring Framework) * Restful Web ...

Mirai, LLC

Full Stack Java Developer

Philadelphia, PA · On-site

$53 - $68.25/hr

The Developer will be part of a product team of designers and full-stack developers (Java back-end) developing a web and mobile application for use by the Front Line Associates & Managers in the ...

next page

Showing results 1-20

All JobsFreelance Java Backend Developer JobsFreelance Java Backend Developer Jobs in Flemington, NJ

Freelance Java Backend Developer information

See Flemington, NJ salary details

$10

$55

$74

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

As of Jun 22, 2026, the average hourly pay for freelance java backend developer in Flemington, NJ is $55.22, according to ZipRecruiter salary data. Most workers in this role earn between $49.09 and $63.65 per hour, depending on experience, location, and employer.
What cities near Flemington, NJ are hiring for Freelance Java Backend Developer jobs? Cities near Flemington, NJ with the most Freelance Java Backend Developer job openings:
Freelance Java Backend Developer jobs near you
Java Backend Developer

Java Backend Developer

InfoVision, Inc.

Bernardsville, NJ

$52.25 - $67.75/hr

Other

Posted 16 days ago

Job description

Sr Java Developer

Dallas TX or NJ or san Diego, CA

Long term Contract

Skill Set - Java, Kafka, spring boot, microservices, Claude AI (LLM experience) , SQL ( all MUST have)

ROLE SUMMARY

We are seeking an experienced Java Developer to join a high-impact engineering team supporting enterprise-scale backend platforms for a leading telecommunications client in Dallas, TX. In this role, you will design and operate event-driven microservices that process real-time data streams, integrate AI-powered capabilities into core workflows, and collaborate with cross-functional teams to deliver scalable, production-grade solutions. Within 90 days, you will be expected to own one or more services end-to-end and contribute meaningfully to platform reliability and AI integration initiatives.

KEY RESPONSIBILITIES

  • Design, develop, and maintain Java-based microservices using Spring Boot, following clean architecture and SOLID principles.
  • Build and manage Apache Kafka producers, consumers, and topic configurations to support real-time event streaming and data pipeline workflows.
  • Integrate Claude AI (Anthropic) APIs into backend services to enable intelligent automation, natural language processing, and AI-assisted decision-making features.
  • Write and optimize complex SQL queries, stored procedures, and schema designs across relational databases (PostgreSQL, MySQL, or Oracle).
  • Develop and expose RESTful APIs, ensuring proper documentation via Swagger/OpenAPI and adherence to security best practices.
  • Participate in CI/CD pipeline management using tools such as Jenkins, GitHub Actions, or Azure DevOps, and contribute to containerized deployments via Docker and Kubernetes.
  • Collaborate with product owners, QA, and DevOps teams in an Agile/Scrum environment to deliver iterative, well-tested software.
  • Conduct code reviews, mentor junior developers, and uphold engineering standards across the team.

REQUIRED QUALIFICATIONS

  • 9+ years of hands-on Java development experience, including strong proficiency in Spring Boot and Spring Framework.
  • Demonstrated experience building and operating Apache Kafka-based event-driven architectures (producers, consumers, schema registry, partitioning strategies).
  • Practical experience integrating or working with large language model (LLM) APIs or generative AI tools (Claude, GPT, Gemini, or equivalent) in production backend systems.
  • Strong SQL skills including schema design, query optimization, and stored procedure development across one or more relational databases.
  • Proficiency with RESTful API design, JSON data modeling, and microservices communication patterns.
  • Bachelor's degree in Computer Science, Engineering, or a related technical field (or equivalent practical experience).

TECHNICAL SKILLS

Java Spring Boot Apache Kafka Claude AI / Anthropic API SQL Microservices REST APIs Docker Kubernetes CI/CD Git JSON JUnit Azure / AWS

PREFERRED QUALIFICATIONS

  • Experience in the telecommunications industry or with high-throughput, enterprise-scale backend systems.
  • Familiarity with NoSQL databases (MongoDB, Cassandra, or DynamoDB) in addition to relational SQL databases.
  • Exposure to prompt engineering, LLM API orchestration frameworks (LangChain4j, Semantic Kernel for Java, or similar), or AI-assisted developer tooling.
  • Knowledge of observability and monitoring tools such as Datadog, Dynatrace, or AppDynamics.
  • Prior experience in Agile/Kanban delivery with distributed or hybrid teams.

Apply