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Freelance Java Backend Developer Jobs in Secaucus, NJ

Java Backend Developer

Jersey City, NJ · On-site

$55.25 - $71.75/hr

The Java Backend Developer role involves contributing to software application design, coding, and maintaining system stability while collaborating with cross-functional teams to enhance software ...

Java Backend Developer.

New York, NY · On-site

$55.25 - $71.75/hr

Java Solution architect Remote Long term contract Required Skills Core Java & Backend * Strong ... Messaging systems like Kafka or RabbitMQ Cloud & DevOps * Experience with AWS / Azure / GCP

Java Developer

New York, NY · On-site

$55.75 - $72.25/hr

Java Backend Engineer Experience: 8+ Years Employment Type: Contract Location: NY We are seeking an experienced Java Backend Engineer with strong expertise in building scalable, high-performance ...

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 ...

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 ...

App Dev - Java - Sr

Passaic, NJ · On-site

$59.25 - $75.50/hr

Java Backend Developer Java Backend Developer/Microservices/Kafka/Springboot Collaborate with and across Agile teams to design, develop, test, implement, and support technical solutions in full-stack ...

Java Backend Developer

Jersey City, NJ · On-site

$55.25 - $71.75/hr

Required : • Experience in software development using Java, Spring Boot • Experience in Java 8, ... Devops Company : Infosys is a technology company that offers consulting, outsourcing, cloud ...

Java Liferay Developer

Manhattan, NY · On-site

$56.25 - $72.75/hr

Position We are looking for an Experienced Java Back-End Developer to join our team. Responsibilities and duties * Quickly gain an up-to-date and comprehensive understanding of the code base and ...

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 ...

Position Summary We are looking for a talented Java back-end senior or lead developer with extensive expertise working on web application back-ends using the Spring Framework. You will be responsible ...

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Freelance Java Backend Developer information

See Secaucus, 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 Secaucus, NJ is $55.54, 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.
What cities near Secaucus, NJ are hiring for Freelance Java Backend Developer jobs? Cities near Secaucus, NJ with the most Freelance Java Backend Developer job openings:

Blockchain Java Backend Developer

Tata Consultancy Service Limited

New York, NY • On-site

$100K - $130K/yr

Full-time

Posted 16 days ago


Job description

Blockchain Java Backend Developer
Must Have Technical/Functional Skills
Core Backend Skills
• Strong proficiency in Java (8+), and frameworks such as Spring Boot / Spring Cloud.
• Experience building distributed systems and microservices architectures at scale.
• Strong knowledge of:
o Concurrency, multithreading, asynchronous programming
o API design (REST/gRPC), security (OAuth2/JWT), and integration patterns
• Solid understanding of data stores:
o SQL (PostgreSQL/MySQL) and/or NoSQL (MongoDB/Cassandra)
o Caching (Redis) and search (Elasticsearch) is a plus
• Hands-on experience with message streaming/queues:
Blockchain Skills (Must-Have)
• Strong understanding of blockchain fundamentals:
o Transactions, blocks, confirmations/finality, consensus, gas/fees, wallets, keys.
• Experience integrating backend services with blockchain networks/nodes:
o Ethereum-compatible networks (Ethereum/Polygon/BSC) using Web3j, ethers-style approaches
o and/or permissioned chains (Hyperledger Fabric, Corda, Quorum)
• Experience supporting large blockchain deployments:
o Node connectivity, RPC management, event indexing, chain reorg handling, retry strategies.
DevOps / Cloud (Preferred)
• Experience with Docker and Kubernetes for containerized microservices deployments.
• CI/CD exposure (Jenkins/GitHub Actions/GitLab CI/Azure DevOps).
• Cloud experience (Azure/AWS/GCP) is a plus.
• Understanding of security practices:
o Secrets management (Vault/KMS), TLS, RBAC, network security.
Roles & Responsibilities
• Design and develop Java-based backend services that interact with blockchain networks and nodes (public or permissioned).
• Build and scale microservices-based architecture supporting blockchain transaction workflows, event processing, and off-chain components.
• Develop reliable services for:
o Transaction orchestration
o Smart contract invocation
o Blockchain event subscription/listening
o On-chain/off-chain data synchronization
• Implement scalable APIs (REST/gRPC) for blockchain-enabled products and integrations.
• Optimize performance for high throughput and low latency:
o Transaction throughput handling, batching, retries, idempotency, rate limiting.
• Ensure secure integration with blockchain:
o Key management best practices, signing transactions, secure secret handling.
• Implement observability and reliability standards:
o Logging, monitoring, tracing, alerting, SLOs/SLAs.
• Work with DevOps/SRE teams to support production deployments, incident triage, and capacity planning.
• Contribute to architecture decisions including:
o Event-driven architecture (Kafka/RabbitMQ), caching strategies, database selection, and deployment topologies.
Salary Range- $100,000-$130,000 a year