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Full Time Freelance Java Developer Jobs in Jacksonville, FL

Centraprise

DevOps/Automation Engineer

Jacksonville, FL · On-site

$49 - $67/hr

Jacksonville, FL (ONSITE) Job Type : Full-Time Automation Software Engineer Required Skills ... Splunk, Java Runtimes, JVM, Middleware Technologies, Terraform Roles & Responsibilities The ...

Sarian, Inc.

Sr. Reactjs Developer

Jacksonville, FL · On-site

$55.50 - $72/hr

NO C2C***** Full time interested candidates share resumes manikanth.d@sariansolutions.com kill ... strong full stack Java development skills with good analytical problem-solving skills. * The ...

PNC Bank

Software Engineer Sr

Jacksonville, FL · On-site

$113K - $149K/yr

... Core Java o Spring Boot microservices o JUnit, mocking frameworks RESTful API design and ... Depending on your eligibility, options for full-time employees include: medical/prescription drug ...

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Full Time Freelance Java Developer information

See Jacksonville, FL salary details

$14

$52

$71

How much do full time freelance java developer jobs pay per hour?

As of Sep 8, 2026, the average hourly pay for full time freelance java developer in Jacksonville, FL is $52.53, according to ZipRecruiter salary data. Most workers in this role earn between $45.43 and $58.80 per hour, depending on experience, location, and employer.

What is the difference between Full Time Freelance Java Developer vs Java Software Engineer?

AspectFull Time Freelance Java DeveloperJava Software Engineer
CredentialsTypically requires Java certifications, coding skills, and portfolioRequires Java certifications, degree in Computer Science, and experience
Work EnvironmentIndependent, remote or on-site, project-basedUsually employed by a company, office or remote
Employer & Industry UsageClients or agencies, freelance platforms, tech startupsTech companies, software firms, corporate IT departments
Search & Comparison IntentLooking for freelance Java roles, project work, flexible scheduleSeeking full-time employment, career growth, stability

While both roles involve Java development, a Full Time Freelance Java Developer works independently on various projects, offering flexibility and diverse experience. A Java Software Engineer is typically employed full-time by a company, focusing on long-term development within a team. Your choice depends on your preferred work style and career goals.

Full Time Freelance Java Developer jobs near you
Infographic showing various Full Time Freelance Java Developer job openings in Jacksonville, FL as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $109,271 per year, or $52.5 per hour.

Java Full Stack Developer

Jacksonville, FL • On-site

Intercontinental Exchange Holdings, Inc.
Finance and Insurance • 5 - 10K employees
Learn more about Intercontinental Exchange Holdings, Inc.external

$48.75 - $62.75/hr

Full-time

Re-posted 29 days ago

Job description

Overview

Job Purpose

We are seeking a Software Developer to join our innovative development team. In this role, you will contribute to the design and development of our applications while taking ownership of specific components and features.

Responsibilities

  • Design, develop, and maintain web applications using Java and Spring Boot for backend services and React for frontend development
  • Implement new features and enhancements to existing functionality with moderate guidance
  • Write clean, efficient, and maintainable code following best practices and team standards
  • Create and maintain RESTful APIs and integrate them with React-based frontends
  • Collaborate with cross-functional teams to understand requirements and deliver solutions
  • Troubleshoot, debug, and resolve technical issues in both backend and frontend systems
  • Participate in code reviews, providing and receiving constructive feedback
  • Write and maintain unit tests to ensure code quality and functionality
  • Contribute to database design and development using SQL and PostgreSQL
  • Stay current with relevant technologies and frameworks
  • Provide occasional guidance to junior developers

Knowledge and Experience

  • Bachelor's degree in Computer Science, Software Engineering, or related field (or equivalent experience)
  • 3+ years of professional software development experience
  • Java Programming: Deep knowledge of Java language, its ecosystem, and best practices
  • Experience with SQL, PostgreSQL and relational database concepts
  • Frontend Technologies: Proficiency in HTML, CSS, JavaScript, React, and TypeScript
  • Backend Development: Expertise in developing and maintaining backend services using Java, Spring, and related technologies
  • Strong understanding of RESTful services, microservices architecture, and database management
  • Familiarity with version control systems like Git, Azure DevOps, and CI/CD pipelines
  • AI & ML Fundamentals: Understanding of natural language processing (NLP), machine learning concepts, and how LLMs work
  • Prompt Frameworks & Techniques: Proficiency in methods such as zero-shot, few-shot, chain-of-thought, and knowledge-generation prompting
  • LLM API Experience: Hands-on work with major AI platforms (e.g., OpenAI, Anthropic, Google Gemini) to test and refine prompts
  • Prompt Optimization: Ability to craft precise, structured instructions that reduce hallucinations and improve accuracy
  • Data Preparation: Preparing and curating datasets for training or fine-tuning models
  • Performance Analysis: Measuring and improving AI output quality through A/B testing and iterative refinement

Preferred Experience 

  • Knowledge of cloud platforms (OCP, Apigee, AWS, GCP, or Azure)
  • Experience with CI/CD pipelines (e.g., Azure DevOps, GitHub Actions)
  • Knowledge of containerization concepts (Docker)
  • Familiarity with microservices architecture
  • Experience with automated testing frameworks
  • Understanding of responsive design and accessibility standards
  • Knowledge of performance optimization techniques 

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----------Intercontinental Exchange, Inc. is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to legally protected characteristics.Employment Type: FULL_TIME

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