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Freelance Junior Java Developer Jobs in Saint Louis, MO

AG Technologies

Junior JAVA Devloper

Chesterfield, MO · On-site

$300/wk

... engineering, interfacing, integration of hardware and software systems to include an understanding ... Experience in Java development This position requires a TS/SCI clearance with a polygraph.

AG Technologies

Junior JAVA Devloper

Chesterfield, MO · On-site

$300/wk

... engineering, interfacing, integration of hardware and software systems to include an understanding ... Experience in Java development This position requires a TS/SCI clearance with a polygraph.

Artius Solutions

Lead Java Engineer

Saint Louis, MO · On-site

$140K - $150K/yr

Mentor and support junior engineers; take part in hiring, onboarding, and technical knowledge ... Java 21 preferred): including lambda expressions, Stream API, CompletableFuture, Virtual Threads ...

CYNET SYSTEMS

Java Technical Lead

Saint Louis, MO · On-site

$55 - $60/hr

... applications using Java. * Minimum of 3-5 years of experience building web services and cloud ... Facilitates code reviews and mentors junior developers. * Uses object-oriented techniques and ...

Wipro Limited

Software Developer

O Fallon, MO · On-site

$60K - $135K/yr

Mentor junior engineers and share your expertise. * Work in an agile environment, participating in ... Strong proficiency in Java and Spring boot framework * Experience designing and developing ...

Staffingine LLC

Automation Engineer

Saint Louis, MO · On-site

... with DevOps and development teams * Seeking a Specialist with 5 to 7 years of experience in ... and Selenium Java Testing to drive quality assurance initiatives * Collaborate with cross ...

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Freelance Junior Java Developer information

See Saint Louis, MO salary details

$59.3K

$103.9K

$156.5K

How much do freelance junior java developer jobs pay per year?

As of Aug 21, 2026, the average yearly pay for freelance junior java developer in Saint Louis, MO is $103,858.00, according to ZipRecruiter salary data. Most workers in this role earn between $73,400.00 and $103,500.00 per year, depending on experience, location, and employer.

What is a freelance junior Java developer?

A Freelance Junior Java Developer is an entry-level programmer who works independently on a contract basis, specializing in Java development. They typically handle coding, debugging, and basic software tasks for clients rather than being employed full-time by a single company. Freelance junior developers often work on smaller projects or assist senior developers, allowing them to gain experience and build their portfolios. This role requires a solid understanding of Java fundamentals and the ability to adapt to different project requirements.

What are the key skills and qualifications needed to thrive as a freelance junior Java developer, and why are they important?

To thrive as a Freelance Junior Java Developer, you need a solid grasp of Java programming, basic software development principles, and a relevant degree or coursework in computer science. Familiarity with tools like Eclipse or IntelliJ IDEA, version control systems such as Git, and an understanding of basic frameworks like Spring Boot are typically required. Strong problem-solving abilities, effective time management, and clear communication make you stand out when collaborating remotely with clients. These skills and qualities are essential to deliver reliable code, meet project deadlines, and build lasting professional relationships as a freelancer.

What are some common challenges freelance junior Java developers face when starting out, and how can they overcome them?

Freelance junior Java developers often face challenges such as finding consistent projects, adapting quickly to different client codebases, and managing their own schedules and client communications. Building a strong online portfolio and actively networking in developer communities can help attract more clients. Additionally, setting clear expectations with clients and continuously improving technical and soft skills are key to overcoming early hurdles and building a successful freelance career.

What is the difference between Freelance Junior Java Developer vs Junior Java Developer?

AspectFreelance Junior Java DeveloperJunior Java Developer
Work EnvironmentIndependent, remote or contract-based projectsFull-time employment in a company or organization
CredentialsTypically requires basic Java knowledge, some coding experienceOften requires a degree or certification in computer science or related field
Employer & Industry UsageClients across various industries, project-basedEmployers in tech, finance, or enterprise sectors
Work ScopeLimited to specific projects, flexible hoursPart of a team, involved in ongoing development tasks

In summary, a Freelance Junior Java Developer works independently on short-term projects, often remotely, with flexible hours and minimal formal employment ties. In contrast, a Junior Java Developer is typically employed full-time within a company, working as part of a team on continuous development tasks, often requiring formal education or certifications.

What are popular job titles related to Freelance Junior Java Developer jobs in Saint Louis, MO?

For Freelance Junior Java Developer jobs in Saint Louis, MO, the most frequently searched job titles are:

What job categories do people searching Freelance Junior Java Developer jobs in Saint Louis, MO look for?

The top searched job categories for Freelance Junior Java Developer jobs in Saint Louis, MO are:

Freelance Junior Java Developer jobs near you

Core Java Developer

Stellar IT Group

Saint Louis, MO • On-site

Contractor

Posted 5 days ago

Job description

Overview:
Position: Core Java Developer
Location: Remote
Duration: 6+ Months Contract
Role Overview
We are seeking experienced Senior Core Java Developers to join our team and contribute to building secure, scalable, and production-ready applications. The ideal candidate will have strong expertise in Java, microservices architecture, and containerization, with hands-on experience in developing REST APIs and implementing secure coding practices. This role requires deep technical proficiency in backend engineering, combined with the ability to collaborate across teams and deliver high-quality solutions in enterprise environments.
Key Responsibilities
  • Design, develop, and maintain Core Java applications with a focus on scalability and performance.
  • Build and integrate microservices architectures using Spring Boot, Spring Security, and Spring Web MVC.
  • Develop and optimize REST APIs for secure and efficient communication between services.
  • Implement secure coding practices to remediate vulnerabilities and ensure compliance with enterprise standards.
  • Work with containerization platforms (Docker, Kubernetes, OpenShift) to deploy and manage applications.
  • Collaborate with cross-functional teams including QA, DevOps, and product owners to deliver production-ready solutions.
  • Conduct code reviews, troubleshoot issues, and provide technical guidance to junior developers.
  • Support CI/CD pipelines and ensure smooth deployment processes.
Required Skills
  • Strong expertise in Core Java development.
  • Hands-on experience with containerization (Docker, Kubernetes, OpenShift).
  • Proficiency in microservices architecture and REST API development.
  • Solid knowledge of Spring Boot, Spring Security, Spring Web MVC.
  • Experience with secure coding practices and vulnerability remediation.
Nice to Have
  • Experience with Harness for CI/CD orchestration.
  • Familiarity with Postman or other API testing tools.
  • Exposure to Red Hat OpenShift for enterprise container management.

Skills:
JAVA,Containerization

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