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

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 ...

TriOptus LLC

Senior Software Engineer - Java Developer

MO · On-site

$53.50 - $68.25/hr

Senior Software Engineer (Java Developer) Location: O'fallon, Missouri Duration: 24 months Experiece: 7+ years Skills summary: • Advanced in with Linux and Java development (JDK 1.7 or greater ...

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 ...

Artius Solutions

Lead Java Engineer

Saint Louis, MO · On-site

$140K - $150K/yr

Experience delivering high-quality software in regulated or large-scale enterprise domains. * Active involvement in tech communities, workshops, or mentoring engineers. Must-Have Technologies * Java ...

MasterCard

Software Engineer II

O Fallon, MO

Title and Summary Software Engineer II Overview The Mastercard Authentication Program owns how ... Design, develop, and own Java-based backend services and REST APIs in a distributed architecture.

ACI Infotech

Java Developer

Lake Saint Louis, MO · On-site

$48.25 - $62.50/hr

... software engineer will have: Bachelors or Masters degree, preferably in Computer Science, Computer Engineering or other technical (STEM) field or an equivalent combination of education and experience ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

The position requires strong expertise in Java-based application development, Spring Boot, Kafka, PostgreSQL, and modern software engineering practices, along with the ability to influence technical ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

The position requires strong expertise in Java-based application development, Spring Boot, Kafka, PostgreSQL, and modern software engineering practices, along with the ability to influence technical ...

Ask IT consulting

JAVA Engineer

Saint Louis, MO · On-site

$50.25 - $69/hr

... software design and development and should be comfortable in a Linux shell Experience with build systems such as: Ant or Maven PREFERRED EXPERIENCE Project experience with JPA Project experience with ...

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All JobsJava Software Engineer JobsJava Software Engineer Jobs in O'Fallon, MO

Java Software Engineer information

See O Fallon, MO salary details

$24

$56

$79

How much do java software engineer jobs pay per hour?

As of Jul 9, 2026, the average hourly pay for java software engineer in O'Fallon, MO is $56.52, 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 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 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.

Which pays more, C++ or Java?

For a Java Software Engineer, salary differences between C++ and Java roles depend on experience, location, and industry. Generally, C++ positions may offer higher salaries due to their use in performance-critical systems, but Java roles are also well-compensated, especially in enterprise environments. Both skills are valuable, and compensation varies based on specific job requirements and market demand.

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 engineer makes $500,000 a year?

A highly experienced senior software engineer, particularly in specialized fields like quantitative finance or at top tech companies, can earn $500,000 or more annually. These roles often require advanced skills, extensive experience, and sometimes stock options or bonuses as part of compensation packages.

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.

Are Java engineers in demand?

Java engineers are in high demand due to the widespread use of Java in enterprise applications, Android development, and backend systems. Skilled Java developers with knowledge of frameworks like Spring and experience with cloud environments are particularly sought after in the job market.

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.

Is Java still useful in 2026?

Java remains a widely used programming language for Java Software Engineers in 2026, especially in enterprise applications, Android development, and backend systems. Its stability, large ecosystem, and ongoing updates ensure continued relevance, and knowledge of Java is valuable for many software development roles.
More about Java Software Engineer jobs
What are popular job titles related to Java Software Engineer jobs in O'Fallon, MO? 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 July 2026, with employment types broken down into 100% Full Time. Highlights an 75% In-person, and 25% Remote job distribution, with an average salary of $117,572 per year, or $56.5 per hour.
Senior Java Software Engineer.

Senior Java Software Engineer.

SV Tech Systems Inc

Clayton, MO

$116K - $153K/yr

Contractor

Re-posted 3 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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