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Java Software Engineer Jobs in O Fallon, MO (NOW HIRING)

SV Tech Systems Inc

Senior Java Software Engineer.

Clayton, MO · On-site

$116K - $153K/yr

Senior Java Software Engineer. Location: Weldon or Clayton, MO Duration: Long term Contract Face to Face interview. Responsibilities As a Senior Software Engineer on the Vehicle Management Team, you ...

VRProIT

Java - SDET

Saint Louis, MO · On-site

Title: Java - SDET Location: St Louis, MO Duration: 3 yrs SDET ROLE * Let me be very clear here - these are NOT traditional QA roles. I.e. Selenium-only or QTP/UFT-only guys who are QA Engineers.

VRProIT

Java - SDET

Saint Louis, MO · On-site +1

Java - SDET Location: St Louis, MO Duration: 3 yrs SDET ROLE * Let me be very clear here - these are NOT traditional QA roles. I.e. Selenium-only or QTP/UFT-only guys who are QA Engineers. Instead, I ...

Highbrow LLC

Sr. Software Engineer

Saint Louis, MO · On-site

$125 - $150/hr

Job Title: Sr. Software Engineer Job ID: 2024-12766 Job Location: Morris Plains, NJ (Preferred ... Java, Spark, Delta Lake, Spring Boot, Jenkins, Kafka Job Responsibilities: Design and implement ...

New

MasterCard

Senior Software Engineer - Java

O Fallon, MO · Hybrid

$116K - $153K/yr

Title and Summary Senior Software Engineer - Java Overview: Mastercard's Enterprise Credit Risk (ECR) team is seeking a talented Senior Software Engineer - Java Full Stack to design, build, and ...

Mastercard, Inc.

Senior Software Engineer - Java

O Fallon, MO · On-site

$116K - $153K/yr

Title and Summary Senior Software Engineer - Java Overview: Mastercard's Enterprise Credit Risk (ECR) team is seeking a talented Senior Software Engineer - Java Full Stack to design, build, and ...

Zentek Infosoft Inc.

Java Engineer

O Fallon, MO · On-site

$48.50 - $66.50/hr

Java Engineer * An ideal candidate for this role would have extensive experience in Java ... Modern Software Design Principles: Deep understanding of design principles like SOLID, DRY (Don't ...

Ports North

Senior Software Engineer -Java

O Fallon, MO · On-site

$80 - $100/hr

Drive performance engineering of the enterprise software architecture and provide guidance, advice ... Proficiency with J2EE, Java 8 or higher, JSP, Servlets, Spring 5, Hibernate, and databases such as ...

Lorven Technologies

Java Engineer

O Fallon, MO · On-site

$48.50 - $66.50/hr

Job Title : Java Engineer Location : O'Fallon, Missouri Duration : Long term contract * Java ... Modern Software Design Principles: Deep understanding of design principles like SOLID, DRY (Don't ...

Lorven technologies

Java Engineer

O Fallon, MO · On-site

$48.50 - $66.50/hr

Job Title : Java Engineer Location : O'Fallon, Missouri Duration : Long term contract * Java ... Modern Software Design Principles: Deep understanding of design principles like SOLID, DRY (Don't ...

ITTConnect

Senior AI Engineer (Java)

Saint Louis, MO · On-site

$117K - $154K/yr

Requirements * 10+ years of total technology or software-engineering experience. * Strong hands-on backend development experience using Java. * Strong experience with Spring Boot, REST APIs, and ...

Moofwd

Software Engineer

O Fallon, MO · On-site

$125 - $150/hr

Plan, design, and develop modern microservice-based solutions in Java and Spring Boot for a cloud-based environment. Moofwd, Inc. has a Software Engineer position in O'Fallon, MO. Key ...

ITTConnect

Senior AI Engineer (Java)

Saint Louis, MO · On-site

$121K - $159K/yr

Requirements 10+ years of total technology or software-engineering experience. Strong hands-on backend development experience using Java. Strong experience with Spring Boot, REST APIs, and ...

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Java Software Engineer information

See O Fallon, MO salary details

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How much do java software engineer jobs pay per hour?

As of Sep 9, 2026, the average hourly pay for java software engineer in O'Fallon, MO is $56.50, according to ZipRecruiter salary data. Most workers in this role earn between $46.54 and $63.85 per hour, depending on experience, location, and employer.

What does a Java software engineer do?

A Java software engineer designs and develops computer applications using the Java programming language. In this job, you work with web developers and other software engineers to integrate java software into online platforms or other types of computer software. You are present for the entire development lifecycle, from design through quality testing. Your other duties may include documenting the programming code for other users or developers and writing reports to management or department heads. Java engineers work in large teams, so you must be able to collaborate with many people to complete a project.

What does a Java software engineer do?

A Java Software Engineer is responsible for designing, developing, and maintaining software applications using the Java programming language. They work on building efficient, scalable, and robust systems, often collaborating with other developers, testers, and stakeholders. Their tasks can include writing code, debugging, testing, and optimizing Java applications for various platforms, such as web, mobile, or enterprise environments. Java Software Engineers also help ensure that software solutions meet client or business requirements and adhere to industry best practices.

What are some typical challenges Java software engineers face when working on large-scale enterprise applications?

Java Software Engineers working on large-scale enterprise applications often encounter challenges such as managing complex codebases, ensuring high performance under heavy loads, and maintaining backward compatibility during system upgrades. Collaborating with cross-functional teams, like QA and DevOps, to streamline deployments and resolve integration issues is common. Additionally, keeping up with evolving frameworks and best practices is important for maintaining code quality and system reliability.

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

To thrive as a Java Software Engineer, you need strong programming skills in Java, a solid understanding of object-oriented design, and typically a degree in computer science or a related field. Familiarity with development tools such as Eclipse or IntelliJ IDEA, version control systems like Git, and frameworks such as Spring or Hibernate is often required. Analytical thinking, problem-solving abilities, and effective teamwork distinguish high-performing individuals in this role. These skills ensure the efficient design, development, and maintenance of robust software applications in collaborative and dynamic technical environments.

What is the difference between Java Software Engineer vs Java Developer?

AspectJava Software EngineerJava Developer
Required CredentialsBachelor's in Computer Science, Java certificationsBachelor's in Computer Science, Java certifications
Work EnvironmentDesigning, developing, and testing Java applicationsWriting, debugging, and maintaining Java code
Employer & Industry UsageTech companies, software firms, enterprise solutionsStartups, software companies, freelance projects
Common Search & ComparisonOften compared for roles involving system design and architectureFocused on coding and implementation tasks

While both roles require similar skills and certifications, Java Software Engineers typically focus on designing and architecting Java applications, whereas Java Developers primarily concentrate on coding and maintaining Java programs. The choice depends on the project scope and career focus.

More about Java Software Engineer jobs

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

What job categories do people searching Java Software Engineer jobs in O'Fallon, MO look for?

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

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

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

Java Software Engineer jobs near you
Infographic showing various Java Software Engineer job openings in O'Fallon, MO as of August 2026, with employment types broken down into 82% Full Time, 14% Part Time, and 4% Contract. Highlights an 85% Physical, 4% Hybrid, and 11% Remote job distribution, with an average salary of $117,521 per year, or $56.5 per hour.

Senior Java Software Engineer.

Clayton, MO • On-site

SV Tech Systems Inc
11 - 50 employees
Learn more about SV Tech Systems Incexternal

$116K - $153K/yr

Contractor

Re-posted 5 days ago

Job description

Company Description

SV Tech Systems prides itself in being the leading provider of recruitment and staffing services for a wide range of industries. We provide staffing services to firms throughout the United States and Canada. We attract the best pool of talent with the aim of nurturing sound work ethics and solid values amongst a highly motivated and diverse workforce.


Job Description

Job Title: Senior Java Software Engineer.
Location: Weldon or Clayton, MO
Duration: Long term Contract
Face to Face interview.
Responsibilities
As a Senior Software Engineer on the Vehicle Management Team, you will be a part of a project team which is responsible for all phases of an agile-like software development lifecycle (SDLC). You will be responsible for developing prototypes and perform application programming. You will interpret business requirements to create and modify custom applications. You will be responsible for analyzing software requirements to determine feasibility within time and cost estimates. You may also be required to perform unit and integration testing.

Technical Environment
    Spring
    Struts
    Hibernate
    Web Services
    Oracle
    Web & Mobile application development
    Cloud based application development

Qualifications

Qualifications Required
    Applicants for employment in the U.S. must possess work authorization which does not require sponsorship by the employer for a visa.
    Must have 5 + years of Java & J2EE
    Must have 2+ years of Oracle database environment
    Must have 2+ years' experience with Spring, Hibernate, and Struts
    Must have 1+ years' experience with Tomcat & Weblogic application servers, Web Services
    Must have experience in the configuration and setup of J2EE application servers
    Must have knowledge of Unix operating systems
    Must have proficient knowledge of Microsoft Office desktop applications software
    Must have good communication skills to effectively communicate with various IT teams
    Candidates must meet or exceed all minimum criteria above.
Preferred
    Experience to AOP and SOA is preferred
    Bachelor's degree in Computer Science, Computer Information Systems, Management Information Systems, or related field preferred.

Additional Information


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