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

JAVA Engineer

Saint Louis, MO

$50.25 - $69/hr

... Java & J2EE Strong experience with Java, J2EE, Struts, Spring, JSF, UML, OOAD, Web Services (SOAP/SOA) and multi-tier software design and development and should be comfortable in a Linux shell ...

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 ...

Sr. Java Developer

Saint Louis, MO · On-site

$55.75 - $71/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Core Java (Mandatory) Web Service [REST and SOAP] (Mandatory) Hibernate or ...

Sr. Java Developer

Saint Louis, MO

$55.75 - $71/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Core Java (Mandatory) Web Service [REST and SOAP] (Mandatory) Hibernate or ...

.Net Developer

Saint Louis, MO · On-site

$47 - $62/hr

Preferred At least 4 years of experience in in Java, J2EE Skills At least 4 years of experience in ... Experience in Server side programming using Java Servlets, JSP, JDBC, JavaBeans, EJB, log4J.

Sr. Java Developer

Saint Louis, MO

$55.75 - $71/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Core Java (Mandatory) Web Service [REST and SOAP] (Mandatory) Hibernate or ...

Senior Java Dev

O Fallon, MO

$53.50 - $68.25/hr

Senior Software Development Engineer Card Portal Overview: Senior Software Development Engineer Card Portal - Commercial Technology under Smart Data Requirements: Java (We use Java 8) Angular (We use ...

Java Architect

Saint Louis, MO

$61.25 - $82.75/hr

Job Responsibilities Manage and mentor a team of developers and analysts throughout the entire ... with J2EE architecture and design Preference for some experience with core Java, J2EE, and DI ...

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 ...

... 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 ...

Senior Java Developer

O Fallon, MO

$53.50 - $68.25/hr

Work closely with other architects, developers, analysts, and project managers as well as business ... J2EE Web Application/Web Services with JBoss & Tomcat. * Advanced skills and knowledge of Hibernate ...

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 ...

... 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 ...

Senior Java Developer

Saint Louis, MO · On-site

$55.75 - $71/hr

... Engineering Concepts and Methodologies is required. • Minimum 5 years of experience working in backend, and micro-service APIs with Java and SpringBoot • Experience with version control systems ...

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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 Jun 16, 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 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 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 Sr Java J2EE Developers?

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 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.
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Java Software Development Engineering

Java Software Development Engineering

TriOptus LLC

Lake Saint Louis, MO • On-site

$54.25 - $69.25/hr

Contractor

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Job description

Job Title: Java Developer/Sr. Java Developer (Multiple roles)
Location: St. Louis, MO
Experience: 3+ year for Java Developer Roles / 5+ years for Sr. Java Developer Roles
Duration: 12+ months
Role:
  • Hands-on developer who writes high quality, secure code that is modular, functional and testable.
  • Lead the design, implementation, and delivery for engineering efforts spanning 1-2 teams.
  • Contribute to all parts of the software's development including design, development, documentation, and testing.
  • Have strong ownership of your team's software and are deep in the maintenance characteristics, runtime properties and dependencies including hardware, operating system, and build.
  • Communicate, collaborate and work effectively in a global environment.

Education and Experience:
  • Degree in Computer Science or related field
  • Strong foundation in algorithms, data structures and core computer science concepts.
  • Evidence of working with object-oriented development and design patterns.
  • Proficiency in multiple modern programming languages such as Java, Python, C++ etc.
  • Strong written and verbal English communications skills.
  • Strong analytical and excellent problem solving skills.
  • Experience working in an Agile environment.
  • Strong communication skills - both verbal and written
  • 5 or more years of related work experience.
  • Experience with XP, TDD and BDD in the software development processes
  • Advantage if you have payments expertise and experience/proficiency with cloud technologies (IaaS, PaaS, serverless technology, NoSQL databases), micro-service design, CI/CD, near real-time, scalable fault tolerant platform design, API design, and distributed systems operations in a DevOps model.