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Java Developer Jobs in O Fallon, MO (NOW HIRING)

Apex Informatics

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location: St Louis, MO * 10+ years of hands-on software engineering experience * Excellent hands-on experience in Java * Experience in developing REST services. * Experience in unit ...

ACI Infotech

Java Developer

Lake Saint Louis, MO · On-site

$48.25 - $62.50/hr

Onsite Sr. Java Developer Location: St. Louis, MO In short, I require ::-- Java , spring boot , microservices and AWS ( cloud is compulsory , if not AWS , any other cloud will work). Responsibilities ...

SESHENG LLC

Java Developer

O Fallon, MO · On-site

$47.75 - $61.75/hr

Java Engineer Onsite( 5days) O''Fallon, Missouri An ideal candidate for this role would have extensive experience in Java development and be well-versed in cloud-native applications, microservices ...

Stellar IT Group

Core Java Developer

Saint Louis, MO · On-site

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 ...

The Timberline Group

Java Developer

Saint Louis, MO · On-site

$250/hr

Strong understanding of Object Oriented Programming * Analyze and develop Java solutions based on customers' needs * The ability to develop technical documentation * Proficient knowledge of Java ...

Gemini

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location: St.Louis, MO - Inperson Interview Job Type: Full Time Only OPT EAD, CPT EAD, H4 EAD, L2 EAD, H1B Visa Transfer JOB DETAILS: Below highlighted skills are mandatory. Experience ...

The Timberline Group

Java Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

Strong understanding of Object Oriented Programming * Analyze and develop Java solutions based on customers' needs * The ability to develop technical documentation * Proficient knowledge of Java ...

Argyle Infotech

Senior Java Developer

Saint Louis, MO · On-site

$55.75 - $71/hr

Senior Java Developer St Louis, MO (Onsite from day 1) Interview Process: 3 rounds will be Zoom Video Strong Java developer with very good understanding of micro services. Grasp of software ...

Pyramid IT

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location - St. Louis, MO Duration: Long term contract Work Authorization status : US Citizen & Green card only Mandatory Skills: J2EE (Java, JSP, Servlets, Filters, Listeners, JSTL, EL ...

Gemini

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location: St.Louis, MO - Inperson Interview Job Type: Full Time Only OPT EAD, CPT EAD, H4 EAD, L2 EAD, H1B Visa Transfer JOB DETAILS: Below highlighted skills are mandatory. • ...

Atria Group LLC

Java Developer

Saint Louis, MO

$49.50 - $64.25/hr

Unigroup is in need of a senior Java developer. They will be part of a 10+ person team developing on a large rewrite of their enterprise system along with smaller projects as well. This individual ...

Argyle Infotech

Senior Java Developer

Saint Louis, MO · On-site

$55.75 - $71/hr

Senior Java Developer St Louis, MO (Onsite from day 1) Interview Process: 3 rounds will be Zoom Video Strong Java developer with very good understanding of micro services. Grasp of software ...

Atria Group LLC

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Required Skills: 5+ years advanced computer programming skills in Java, Java Servlet, Javabean, EJB, OO Design, HTML. Advanced working skills in programming with SQL or Oracle. Experience writing ...

Clearwing

Backend Java Developer

Chesterfield, MO · On-site

$80 - $100/hr

Job Discription Java Programming language - Candidate will have an opportunity to work directly with the users, business analyst, translate business requirements into the technical architecture and ...

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All JobsJava Developer JobsJava Developer Jobs in O'Fallon, MO

Java Developer information

See O Fallon, MO salary details

$14

$53

$72

How much do java developer jobs pay per hour?

As of Sep 9, 2026, the average hourly pay for java developer in O'Fallon, MO is $53.04, according to ZipRecruiter salary data. Most workers in this role earn between $45.87 and $59.38 per hour, depending on experience, location, and employer.

What is a Java developer?

Java Developers are software professionals who specialize in designing, developing, and maintaining applications using the Java programming language. They work on a variety of projects, including web, desktop, and mobile applications, as well as enterprise-level systems. Java Developers are responsible for writing clean and efficient code, testing and debugging programs, and collaborating with other team members to deliver robust software solutions. Their expertise in Java and related technologies is crucial for building scalable and secure applications.

What do Java developers do?

Java developers create dynamic computer applications and websites using the Java computer programming language. The Java language integrates with other programming languages and infrastructures to build robust business applications and software for a wide range of industries, from finance and healthcare to content management and social media. Java developers may be involved in all stages of application development, from conception and design to testing, production, and ongoing maintenance. The goal is to provide efficient solutions for business needs.

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

To thrive as a Java Developer, you need strong proficiency in Java programming, object-oriented design, and a solid understanding of software development principles, usually supported by a degree in computer science or related fields. Familiarity with frameworks such as Spring or Hibernate, experience with version control systems like Git, and sometimes certification like Oracle Certified Professional Java Programmer (OCPJP) are commonly required. Effective problem-solving, teamwork, and attention to detail are crucial soft skills in this role. These skills ensure robust, maintainable, and scalable software solutions that meet project requirements and business goals.

What are some common challenges Java developers face when working on large-scale enterprise applications?

Java Developers working on large-scale enterprise applications often encounter challenges such as managing complex codebases, ensuring efficient performance, and integrating with legacy systems. Collaborating with cross-functional teams is crucial, as these projects typically involve multiple developers, QA engineers, and business analysts. Additionally, maintaining code quality and adhering to best practices while meeting tight deadlines can be demanding. Staying up-to-date with evolving frameworks and tools also plays a key role in overcoming these challenges.

What is the difference between Java Developer vs Software Engineer?

AspectJava DeveloperSoftware Engineer
Required CredentialsBachelor's in Computer Science or related, Java certificationsBachelor's in Computer Science or related, various certifications
Work EnvironmentDevelops Java-based applications, often in teamsDesigns and develops software solutions, may include Java projects
Employer & Industry UsageTech companies, finance, e-commerceBroad industry, including tech, finance, healthcare

Java Developers focus specifically on Java programming, while Software Engineers have a broader role in designing and developing software solutions across multiple languages. Both roles often require similar educational backgrounds and certifications, but Java Developers typically work more directly with Java-based projects, whereas Software Engineers may handle diverse technologies.

Is a Java developer still in demand?

Java developers remain in high demand due to the language's widespread use in enterprise applications, Android development, and backend systems. Skills in frameworks like Spring and knowledge of cloud platforms can enhance job prospects in this field.
More about Java Developer jobs

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For Java Developer jobs in O'Fallon, MO, the most frequently searched job titles are:

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The top searched job categories for Java Developer jobs in O'Fallon, MO are:

What cities near O'Fallon, MO are hiring for Java Developer jobs?

Cities near O'Fallon, MO with the most Java Developer job openings:

Java Developer jobs near you
Infographic showing various Java Developer job openings in O'Fallon, MO as of September 2026, with employment types broken down into 80% Full Time, 10% Part Time, and 10% Contract. Highlights an 78% Physical, 4% Hybrid, and 18% Remote job distribution, with an average salary of $110,322 per year, or $53 per hour.

Java Developer

Lake Saint Louis, MO • On-site

Texas State Library and Archives Commision
Libraries and Archives • 201 - 500 employees
Learn more about Texas State Library and Archives Commisionexternal

$48.25 - $62.50/hr

Contractor

Re-posted 14 days ago

Job description

Role: Java Developer
Location: St.Louis,MO
Duration: 12 Months
Contract
  • Strong Java developer with very good understanding of micro services.
  • Grasp of software engineering skills in modular design, data structures, algorithms
  • Deep knowledge and hands on experience with modern applications like spring boot, Angular.
  • Experience building and operating critical production systems
  • Solid understanding of modern API design and Restful principles
  • Fluent with git (preferred) or other SCM system
  • Write well designed and testable code
  • Strong Experience in automation and build tools like Maven, Ant and Gradle.
  • Bachelor's degree in computer science engineering or a related discipline, or equivalent work experience.
  • Experience in software development design and implementation of large scale distributed systems and web services building complex software that is testable and designed for extensibility.
  • Good understanding of building, deploying, and maintaining critical applications in a cloud based environment.
  • Work extensively with open source software capable to modify or extend code maintained as part of an open source project.
  • Employ both Object Orientated development skills and Systems Engineering skills.

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