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Freelance Junior Java Developer Jobs in Saint Louis, MO

Palnar

Senior BizOps/SRE/Devops Engineer

O Fallon, MO · On-site

$121K - $156K/yr

... and mentor junior resources Able to perform on-call duties on a rotational basis. All About ... Java, J2EE, WebServices (SOAP/REST), Spring/Spring Boot and Hibernate skills. Experience with ...

Deloitte

Guidewire PolicyCenter Sr Developer

Saint Louis, MO · On-site

$53 - $70/hr

In addition to contributing through hands-on development, you will help guide junior practitioners ... A strong Java, Gosu (Guidewire), EJB, BPEL, UNIX background Experience with Business Process ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

This role is hands-on and requires deep expertise in Java and Spring-based platforms, strong ... Mentor junior engineers and contribute to a culture of technical excellence and ownership. All ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

This role is handson and requires deep expertise in Java and Springbased platforms, strong ... Mentor junior engineers and contribute to a culture of technical excellence and ownership. All ...

Leonardo DRS

Embedded Software Engineer Intern

Bridgeton, MO · On-site

$41K - $53K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

This position will be working on a variety of programs and writing (C,C++,C#, Java and Python ... High School Diploma or GED, and currently a Junior or above in a Bachelor's program in Computer ...

Leonardo DRS

Embedded Software Engineer Intern

Bridgeton, MO · On-site

$41K - $53K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

This position will be working on a variety of programs and writing (C,C++,C#, Java and Python ... High School Diploma or GED, and currently a Junior or above in a Bachelor's program in Computer ...

Leonardo DRS

Embedded Software Engineer Intern

Bridgeton, MO · On-site

$41K - $53K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

This position will be working on a variety of programs and writing (C,C++,C#, Java and Python ... High School Diploma or GED, and currently a Junior or above in a Bachelor's program in Computer ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... Java, Spring Boot, and microservices architecture. Deploy, manage, and optimize applications ... Mentor junior engineers, share technical expertise, and provide guidance on engineering best ...

USM

Pega developer - ONLY GC or USC

Saint Louis, MO · On-site

$54.75 - $71.75/hr

Mentor junior developers and supervise implementation of designed solution. Experience/Education ... Development experience with a Pega 6.0, pega 7.0 and above Development experience with a Java EE ...

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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 18, 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

Senior BizOps/SRE/Devops Engineer

Palnar

O Fallon, MO • On-site

$121K - $156K/yr

Full-time

Re-posted 23 days ago

Job description

Roles and Responsibilities:
Engage in and improve the whole lifecycle of services-from inception and design, through deployment, operation and refinement.
Design, implement, and enhance our deployment automation based on Chef.
We need proven experience writing chef recipes/cookbooks as well as designing and implementing an overall Chef based release and deployment process.
Use Jenkins to orchestrate application release & integration with tools Sonar, Chef, Maven, Artifactory, etc. to build out the CI/CD pipeline.
Support deployments of code into multiple lower environments. Supporting current processes needed with an emphasis on automating everything as soon as possible.
Design and implement a Git based code management strategy that will support multiple environment deployments in parallel. Experience with automation for branch management, code promotions, and version management is a plus.
Analyze ITSM activities of the platform and provide feedback loop to development teams on operational gaps or resiliency concerns
Support services before they go live through activities such as system design consulting, capacity planning and launch reviews.
Maintain services once they are live by measuring and monitoring availability, latency and overall system health.
Scale systems sustainably through mechanisms like automation, and evolve systems by pushing for changes that improve reliability and velocity.
Support the application CI/CD pipeline for promoting software into higher environments through validation and operational gating, and lead Client in DevOps automation and best practices.
Work with a global team spread across tech hubs in multiple geographies and time zones
Share knowledge and mentor junior resources
Able to perform on-call duties on a rotational basis.
All About Candidates:
BS degree in Computer Science or related technical field involving coding (e.g., physics or mathematics), or equivalent practical experience.
Engineer with experience in industry standard CI/CD tools like Git/BitBucket, Jenkins, Maven, Artifactory, Groovy and Chef. Experience designing and implementing an effective and efficient CI/CD flow that gets code from dev to prod with high quality and minimal manual effort is required.
Sound knowledge and extensive hands-on experience in cloud based architecture (Preferably in Azure and PCF)
Experience with Java, J2EE, WebServices (SOAP/REST), Spring/Spring Boot and Hibernate skills.
Experience with algorithms, data structures, scripting, pipeline management, and software design.
Systematic problem-solving approach, coupled with strong communication skills and a sense of ownership and drive.
Drive adoption of development services (Performance Engineering, Continuous Integration, Continuous Delivery, and Collaboration) amongst various delivery teams.
Ability to debug and optimize code and automate routine tasks.
We support many different stakeholders.
Experience in dealing with difficult situations and making decisions with a sense of urgency is needed.
Interest in designing, analyzing and troubleshooting large-scale distributed systems.
We need team members with an appetite for change and pushing the boundaries of what can be done with automation. Experience in working across development, operations, and product teams to prioritize needs and to build relationships is a must.
Interest in designing, analysing and troubleshooting large-scale distributed systems.
Experience in Splunk, Dyntrace, Docker, Kubernetes is a plus.
Ability to debug and optimize code and automate routine tasks.
Experience in Agile Development Environment.

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