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Sr Java J2Ee Developer Jobs in O Fallon, MO (NOW HIRING)

MyASAP

Java Developer

Saint Louis, MO

$49.50 - $64.25/hr

... Java, J2EE Technologies (Servlets, JSP, JDBC & JNDI), RESTful, JSON, Web Technologies (HTML, CSS ... oriented analysis, design, and programming experience and SOLID principles Experience in ...

AG Technologies

Junior JAVA Devloper

Chesterfield, MO · On-site

$300/wk

... Engineering, Math or Information Systems from an accredited university or equivalent work experience in lieu of degree. A minimum of 2 years of relevant work experience with Java/J2EE application ...

MyASAP

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

... Java, J2EE Technologies (Servlets, JSP, JDBC & JNDI), RESTful, JSON, Web Technologies (HTML, CSS ... and programming experience and SOLID principles • Experience in implementing various design ...

AG Technologies

Junior JAVA Devloper

Chesterfield, MO · On-site

$300/wk

... Engineering, Math or Information Systems from an accredited university or equivalent work experience in lieu of degree. A minimum of 2 years of relevant work experience with Java/J2EE application ...

CYNET SYSTEMS

Senior Java Developer

Saint Louis, MO · On-site

$50 - $55/hr

Java/JEE, Spring, Spring Boot, REST/SOAP web services, Hibernate, SQL, Tomcat, Application servers ... We deliver agile, scalable talent solutions across IT, engineering, life sciences, clinical, and ...

CYNET SYSTEMS

Senior Java Developer

Saint Louis, MO · On-site

$50 - $55/hr

Java/JEE, Spring, Spring Boot, REST/SOAP web services, Hibernate, SQL, Tomcat, Application servers ... We deliver agile, scalable talent solutions across IT, engineering, life sciences, clinical, and ...

CYNET SYSTEMS

Senior Java Developer

Saint Louis, MO · On-site

$50 - $55/hr

Java/JEE, Spring, Spring Boot, REST/SOAP web services, Hibernate, SQL, Tomcat, Application servers ... We deliver agile, scalable talent solutions across IT, engineering, life sciences, clinical, and ...

Atria Group LLC

Java Developer

Saint Louis, MO · On-site

$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 ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

All About You Strong experience with Java/J2EE, Spring Boot, and distributed systems. Experience ... Developer Studio Desirable Skills Experience with distributed computing platforms and in-memory ...

Mastercard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

All About You • Strong experience with Java/J2EE, Spring Boot, and distributed systems. • ... IntelliJ or JBoss Developer Studio Desirable Skills • Experience with distributed computing ...

Mastercard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

All About You • Strong experience with Java/J2EE, Spring Boot, and distributed systems. • ... IntelliJ or JBoss Developer Studio Desirable Skills • Experience with distributed computing ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

All About You • Strong experience with Java/J2EE, Spring Boot, and distributed systems. • ... IntelliJ or JBoss Developer Studio Desirable Skills • Experience with distributed computing ...

The Timberline Group

Java/Angular Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

The developer will meet with clients, analyze client requirements, propose & construct solutions ... Java/ Angular, J2EE, Servlets, XML * HTML, CSS, JavaScript, JQuery * JUnit, Mockito * Apache ...

Avance Consulting Services

Java

Saint Louis, MO

$49.50 - $64.25/hr

It provides strategic business consulting, technology, engineering and outsourcing services to help ... Preferred At least 4 years of experience with Java/J2EE Technologies like Servlets, EJB, JSP, JDBC ...

Zentek Infosoft Inc.

Java Engineer

O Fallon, MO · On-site

$48.50 - $66.50/hr

Has at least 8+ years of hands-on Java development experience, specifically in J2EE (Java 2 ... This person would fit well into a senior or lead developer role, where they can leverage their deep ...

Pyramid IT

Java Developer

Saint Louis, MO

$49.50 - $64.25/hr

Founded 1996 Role: Java Developer Location - St. Louis, MO Duration: Long term contract Work ... J2EE (Java, JSP, Servlets, Filters, Listeners, JSTL, EL) Struts 2.0 (MVC framework for Web Tier ...

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All JobsSr Java J2Ee Developer JobsSr Java J2Ee Developer Jobs in O'Fallon, MO

Sr Java J2Ee Developer information

See O Fallon, MO salary details

$10

$58

$80

How much do sr java j2ee developer jobs pay per hour?

As of Aug 18, 2026, the average hourly pay for sr java j2ee developer in O'Fallon, MO is $58.77, according to ZipRecruiter salary data. Most workers in this role earn between $51.49 and $65.67 per hour, depending on experience, location, and employer.

What is a Sr Java J2EE developer?

Sr Java J2EE Developers are experienced software engineers who specialize in building, deploying, and maintaining enterprise-level applications using Java and the Java 2 Platform, Enterprise Edition (J2EE). They work with technologies like Servlets, JSP, EJB, and frameworks such as Spring and Hibernate to develop scalable, secure, and reliable software solutions. Senior developers often lead teams, design system architecture, and ensure best coding practices are followed throughout the software development lifecycle.

What are some common challenges Sr Java J2EE developers face when working on large-scale enterprise applications?

Sr Java J2EE Developers often encounter challenges such as managing application scalability, ensuring code maintainability, and integrating with legacy systems. Large-scale projects typically involve coordinating with cross-functional teams, which requires effective communication and collaboration skills. Additionally, staying updated with evolving frameworks and best practices is crucial to address performance bottlenecks and maintain security. Proactively addressing these challenges is essential for delivering robust, high-quality enterprise solutions.

What are the key skills and qualifications needed to thrive as a Sr Java J2EE developer, and why are they important?

To thrive as a Sr Java J2EE Developer, you need advanced proficiency in Java programming, expertise in J2EE frameworks, and a bachelor's degree in computer science or a related field. Familiarity with tools like Spring, Hibernate, Maven, RESTful APIs, and version control systems such as Git is typically required. Strong problem-solving abilities, effective communication, and leadership skills make a developer stand out in this senior role. These competencies are crucial for designing robust enterprise applications, collaborating with cross-functional teams, and leading projects to successful completion.

What is the difference between Sr Java J2Ee Developer vs Java Software Engineer?

AspectSr Java J2Ee DeveloperJava Software Engineer
Required CredentialsBachelor's in CS or related, Java certifications often preferredBachelor's in CS or related, Java certifications beneficial
Work EnvironmentDevelops enterprise applications, often in large teamsDesigns and develops Java applications, may work in teams or individually
Industry UsageCommon in finance, healthcare, and enterprise sectorsUsed across various industries including tech, finance, and startups
Search & Comparison IntentOften compared for seniority, responsibilities, and skillsCompared for roles, skills, and career progression

While both roles involve Java development, Sr Java J2Ee Developers typically focus on enterprise-level applications with more experience and responsibilities, whereas Java Software Engineers may work on a broader range of Java projects, including both enterprise and consumer applications.

What are popular job titles related to Sr Java J2Ee Developer jobs in O'Fallon, MO?

For Sr Java J2Ee Developer jobs in O'Fallon, MO, the most frequently searched job titles are:

What cities near O'Fallon, MO are hiring for Sr Java J2Ee Developer jobs?

Cities near O'Fallon, MO with the most Sr Java J2Ee Developer job openings:

Sr Java J2Ee Developer jobs near you
Infographic showing various Sr Java J2Ee Developer job openings in O'Fallon, MO as of June 2026, with employment types broken down into 54% Full Time, and 46% Contract. Highlights an 93% In-person, and 7% Hybrid job distribution, with an average salary of $122,250 per year, or $58.8 per hour.

Java Developer

MyASAP

Saint Louis, MO

$49.50 - $64.25/hr

Contractor

Re-posted 11 days ago

Job description

Job Description

 Design, code, test and implement of new applications across Equifax's delivery platforms according to development standards and processes. 
6+ years of software development experience with extremely strong skills in Java & Unix. 
Assist production support of applications in PROD and Pre PROD. 
Conduct unit testing and integration testing for functionality. 
Hands-On experience with Code builds and CI/CD processes. 
Analyze a problem and choose the best and most cost-effective solution. 
Technology Skillset: 
Extensive experience in analysis, design, coding, testing, developing, debugging, configuring, deploying, and supporting enterprise applications using Java, J2EE Technologies (Servlets, JSP, JDBC & JNDI), RESTful, JSON, Web Technologies (HTML, CSS, XML, JavaScript, & AJAX), Struts, Spring, Boot, JPA, Hibernate, Jersey, Jackson, Hive, JUnit, jQuery & Angular5, TypeScript, Node.js, Tomcat & WebSphere App Servers. 
Strong Experience in scripting languages like Powershell, Bash. 
Hands on experience Configuring and Administering SCM(GIT, SVN), Build (CMake, Make files, Maven), Nexus, CI(Jenkins), CD Automation Tools like Octopus. 
Experience with RDBMS databases and preferably, MS SQL Server databases. 
Experience in NoSQL Databases like MongoDB. 
Experience with developing for Linux environments. 
Experience in Web development with AngularJS or similar UI frameworks & Restful web services 
Other Required skillset: 
Extremely strong skills in writing high performance production quality code with focus on logging and exception handling 
Strong object-oriented analysis, design, and programming experience and SOLID principles 
Experience in implementing various design patterns like MVC, Singleton, Factory, Abstract Factory, Business Delegate, Service Locator, Front Controller, Data Access Objects and Data Transfer Objects. 
Experience in Object Oriented Analysis and Design, UML and associated tools such as Rational Rose. 
Experience in Jira, Confluence, Agile/Scrum development methodology 
Extensive exposure on administration, troubleshooting, configuration, deployment and support activities of enterprise applications on WebSphere Application Server and Apache Tomcat. 
Experience in performing code review 
Proven experience in Test Driven Development and Automation working in a Continuous Delivery environment. 
Highly motivated, creative, self-directed, and thrives in small Agile teams in multi-site settings 
Strong computer science fundamentals including a deep understanding of data structures and distributed algorithms 
Ensure proper governance of technical deliveries, including supporting artifacts. 
Be responsible for the functional integrity and proper operation of all supported systems 
Working closely with Development, QA, Product Management, and Production Ops teams to make sure Product Releases on-time with quality. 
Strong Automation, problem-solving skills, and ability to follow through to completion. 
Works well independently and requires little or no supervision. Strong verbal/written communication skills.

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