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Freelance Java Developer Government Jobs in New York

CYNET SYSTEMS

Java Full Stack Developer

Iselin, NJ · On-site

$55 - $60/hr

... government agencies, and enterprise organizations across the United States and Canada. We deliver ... , life sciences, clinical, and professional staffing, powered by a high-performing recruitment ...

SoftNice INC

Java or .Net

Jersey City, NJ

$53.25 - $69/hr

... government regulations stipulate temporary staff receive the same benefits. These savings on ... JAVA Introduction to Servelets Writing Java server pages Java Naming and Directory interface (JNDI ...

USM

Urgent Need JAVA J2EE with Hadoop exp

Bedminster, NJ · On-site

$52.25 - $67.50/hr

We are a project-driven firm that reliably meets the IT needs of our State and Government customers ... Java Hadoop Developer LOCATION: Bedminster NJ DURATION: 2 year project TOP 5 SKILLS : Required ...

CYNET SYSTEMS

Java Full Stack Developer

New York, NY · On-site

$55 - $60/hr

... Azure DevOps, GitHub, and CI/CD pipelines. * Strong knowledge of Microservices and Java ... government agencies, and enterprise organizations across the United States and Canada. We deliver ...

Infojini Inc

Java Application Developer

Newark, NJ · On-site

... Government and commercial customer base including fortune 100 companies and most state and federal ... Sr. Java Application Developer Location: Newark, NJ Duration: Contract to hire Citizens or ...

Technamo LLC

Sr. Java API developer

Jersey City, NJ · On-site

$59.75 - $76.25/hr

... Services to government and commercial companies. Technamo is a Tier-I Contractor to provide ... Experience building REST and SOAP web services using Java * Experience with Web Services(JSON, REST ...

Technamo

Sr. Java API developer

Jersey City, NJ · On-site

$59.75 - $76.25/hr

... Services to government and commercial companies. Technamo is a Tier-I Contractor to provide ... Experience building REST and SOAP web services using Java * Experience with Web Services(JSON, REST ...

CYNET SYSTEMS

Java Architect

Jersey City, NJ · On-site

$60 - $65/hr

Proven ability to lead architecture decisions, mentor engineering teams, and engage with business ... government agencies, and enterprise organizations across the United States and Canada. We deliver ...

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Freelance Java Developer Government information

What is the difference between Freelance Java Developer Government vs Freelance Java Developer Private Sector?

AspectFreelance Java Developer GovernmentFreelance Java Developer Private Sector
CredentialsTypically requires security clearances and government-specific certificationsGenerally requires standard Java certifications and portfolio
Work EnvironmentGovernment agencies, often in secure or regulated settingsPrivate companies, startups, or consulting firms
Employer & Industry UsagePublic sector projects, government contractsCommercial projects, private sector clients
Search & Comparison IntentSeeking government-specific freelance Java rolesLooking for private sector freelance Java opportunities

Freelance Java Developers working with government agencies often need security clearances and government-specific certifications, working in secure environments on public sector projects. In contrast, private sector freelance Java developers typically focus on commercial projects, requiring standard Java skills and certifications. The choice depends on your credentials, work environment preferences, and the type of projects you aim to pursue.

What cities in New York are hiring for Freelance Java Developer Government jobs?

Cities in New York with the most Freelance Java Developer Government job openings:

Freelance Java Developer Government jobs near you

Senior Java Developer - Child Support Management System

STRATEGIC MINDZ LLC

Manhattan, NY • On-site

$65 - $75/hr

Full-time

Medical, Dental, Vision, Retirement

Re-posted 8 days ago

Job description

Benefits:
  • 401(k)
  • Dental insurance
  • Health insurance
  • Vision insurance

Senior Java Developer – CSMS (Child Support Management System)

Job Summary:
We are seeking an experienced Senior Java Developer to join the CSMS modernization team. You will design, develop, and maintain mission-critical microservices and applications that support child support case management operations. The role requires strong experience in microservices architecture — building, deploying, and maintaining loosely coupled, independently deployable services. Your work will span web application development, REST API services, batch processing, and system integrations within a cloud-native environment.
Key Responsibilities:
  • Design, develop, and maintain microservices using Spring Boot, following domain-driven design and service decomposition best practices
  • Build and deploy loosely coupled, independently deployable services with well-defined API contracts
  • Develop scalable web applications, RESTful APIs, batch jobs, and integration services for the application platform
  • Develop and optimize Spring Batch jobs for high-volume data processing, reporting, and scheduled workflows
  • Implement data access layers using Hibernate/JPA against PostgreSQL databases
  • Manage inter-service communication patterns including synchronous REST calls and asynchronous messaging
  • Collaborate with architects and business analysts to translate requirements into technical solutions
  • Participate in code reviews, enforce coding standards, and mentor junior developers
  • Troubleshoot application issues and provide timely resolutions across distributed microservices
  • Contribute to CI/CD pipeline improvements and deployment automation for microservices
  • Write unit and integration tests to ensure code quality and reliability
  • Work with cross-functional teams on system integration efforts including third-party and inter-agency data exchanges

Consultants may be eligible to telecommute for more than 50% of their work hours, up to and including 100% remote work. Telecommuting arrangements require direct manager approval and are subject to change based on program needs. Consultants approved for 100% remote work must attend monthly in-person meetings at the Albany office and be available for major milestone meetings as needed. 

Mandatory Qualifications:

  • 7+ years of professional Java development experience
  • Strong proficiency in Java 21 (records, sealed classes, pattern matching, virtual threads)
  • Proven experience designing and building microservices architectures — service decomposition, API gateway patterns, service discovery, and distributed configuration
  • Extensive experience with Spring Boot and the Spring ecosystem (Spring MVC, Spring Data, Spring Security, Spring Cloud)
  • Hands-on experience with Spring Batch for large-scale batch processing
  • Solid understanding of Hibernate/JPA for ORM and database interaction
  • Experience with PostgreSQL or similar relational databases
  • Proven track record of building and consuming RESTful APIs with proper versioning and contract-first design
  • Experience with inter-service communication patterns (REST, messaging queues, event-driven)
  • Experience deploying and operating microservices on AWS (EC2, ECS/EKS, RDS, S3, SQS, Lambda)
  • Familiarity with CI/CD tools (Jenkins, GitHub Actions, or similar) for microservices deployment pipelines
  • Strong understanding of software design patterns, SOLID principles, and clean code practices
  • Experience with Git version control and collaborative development workflows
  • Understanding of distributed system concerns: fault tolerance, circuit breakers, retries, and observability
Desirable Qualifications:
  • Experience with government or public sector projects
  • Hands-on experience with microservices patterns such as saga, CQRS, event sourcing, and API composition
  • Familiarity with service mesh technologies 
  • Experience with containerization (Docker) and orchestration (Kubernetes/ECS) for microservices deployment
  • Knowledge of message-driven architecture (SQS, SNS, Kafka) for asynchronous inter-service communication
  • Knowledge of API gateway solutions (AWS API Gateway, Spring Cloud Gateway)
  • Experience with centralized logging and distributed tracing across microservices (CloudWatch, Splunk, Datadog, Zipkin, OpenTelemetry)
  • Knowledge of infrastructure-as-code (Terraform, CloudFormation)
  • Understanding of OAuth2/OpenID Connect for securing microservices
  • Knowledge of database-per-service patterns and database migration tools (Flyway, Liquibase etc)

Flexible work from home options available.