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

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

Senior Java Engineer

Saint Louis, MO · On-site

$55.75 - $71/hr

Overview We are looking for a highly skilled Senior Java Engineer to design, develop, and maintain ... Collaborate with cross-functional teams including DevOps, QA, and product to deliver high-quality ...

Senior Java Developer

Saint Louis, MO · On-site

$54.25 - $69.25/hr

Mandatory Skills: 8-10+ years of hands-on software engineering experience Recent experience in Java, Kotlin, Oracle, Postgres, Data handling, Spring, Spring Boot Recent experience in Kafka, in memory ...

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 ...

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, and production-ready ...

Java Developer

O Fallon, MO · On-site

$47.75 - $61.75/hr

This person would fit well into a senior or lead developer role, where they can leverage their deep Java expertise, cloud knowledge, and problem-solving skills to drive impactful projects.

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 ...

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Senior Java Developer information

See O Fallon, MO salary details

$10

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How much do senior java developer jobs pay per hour?

As of Sep 8, 2026, the average hourly pay for senior java developer in O'Fallon, MO is $58.75, according to ZipRecruiter salary data. Most workers in this role earn between $51.49 and $65.62 per hour, depending on experience, location, and employer.

What is a senior Java developer?

Senior Java Developers are experienced software engineers who specialize in using the Java programming language to design, develop, and maintain complex applications. They typically lead development teams, oversee project architecture, and ensure code quality through best practices. In addition to strong coding skills, they often mentor junior developers and collaborate with stakeholders to deliver robust software solutions. Their expertise is crucial in building scalable, high-performance applications across various industries.

What are the key skills and qualifications needed to thrive as a senior Java developer?

To thrive as a Senior Java Developer, you need advanced proficiency in Java programming, experience with software design patterns, and a strong grasp of backend development, often supported by a degree in computer science or related field. Familiarity with frameworks like Spring, build tools such as Maven or Gradle, and version control systems like Git, as well as knowledge of cloud platforms, is typically required. Excellent problem-solving, leadership, and communication skills help you guide teams and collaborate effectively. These competencies are crucial for delivering robust, scalable software solutions and driving technical success within development teams.

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

Senior Java Developers often encounter challenges such as maintaining code quality across large codebases, managing dependencies between modules, and ensuring optimal application performance. Collaborating with cross-functional teams—including QA, DevOps, and product management—requires clear communication and effective problem-solving. Additionally, staying updated with the latest Java frameworks and best practices is essential for delivering scalable and maintainable solutions in complex enterprise environments.

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

AspectSenior Java DeveloperJava Software Engineer
Required CredentialsBachelor's in CS or related, Java certifications often preferredBachelor's in CS or related, Java certifications beneficial
Work EnvironmentTeam lead roles, project management, mentoringDevelopment-focused, coding, testing, and implementation
Employer & Industry UsageTech companies, finance, e-commerceSoftware firms, startups, enterprise IT
Common Search & ComparisonOften compared for experience level and responsibilitiesSimilar roles with slight variations in scope

The main difference between a Senior Java Developer and a Java Software Engineer lies in their responsibilities and experience. Senior Java Developers typically take on leadership, mentoring, and project management roles, while Java Software Engineers focus more on coding, development, and technical implementation. Both roles require strong Java skills and relevant credentials, but the Senior Java Developer usually has more experience and a broader scope of responsibilities.

What are the most commonly searched types of Java Developer jobs in O'Fallon, MO?

The most popular types of Java Developer jobs in O'Fallon, MO are:

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

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

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

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

Infographic showing various Senior Java Developer job openings in O'Fallon, MO as of August 2026, with employment types broken down into 79% Full Time, 9% Part Time, and 12% Contract. Highlights an 81% Physical, 5% Hybrid, and 14% Remote job distribution, with an average salary of $122,196 per year, or $58.7 per hour.

Senior Java/Devops Engineer Locals to MO Only

O Fallon, MO

Iconma
Recruiting and Staffing Services • 1 - 5K employees

$116K - $153K/yr

Contractor

Re-posted 4 days ago


Job description

Job Description

 

Senior Java/Devops Engineer

Location: O'Fallon, MO

Duration: 12 months with possible extension

Description

Will be working with application teams.

Has to do Automation work.

Product based environment.

Skills:

Configuration management

CI/CD
Devops

Infrastructure automation

Automation.

Preferred skills:

Preferably from Development background.

Mahesh

732-374-3579

Additional Information

All your information will be kept confidential according to EEO guidelines.


ICONMA logo

About ICONMA

Sourced by ZipRecruiter

ICONMA is an established and stable organization building lasting relationships with clients and consultants. We are unique in our ability to provide a full spectrum of Staffing Services and Solutions including: Staff Augmentation (Contract, Contract-to-Hire, Direct Hire), Bulk Buy Staff Augmentation, Offshore Staff Augmentation, Payroll Services and Consulting (Project Delivery, SOW). At ICONMA, our goal is to become a one-stop destination for our customers' staffing and outsourcing needs. Our vision is to be a preeminent provider of innovative business solutions, leveraging key technologies to improve our customers' competitiveness, growth, and profitability. ICONMA focuses on a culture that fosters collaboration and team work. We recognize that employees are the foundation of any company, and we encourage our employees to be leaders while providing continuous training and growth opportunities. ICONMA encourages hard work, determination and dedication in a professional environment. ICONMA promotes a healthy work-life balance, and understands this is a key component to our employee's and company's success.

Industry

Recruiting and staffing services

Company size

1,001 - 5,000 Employees

Headquarters location

Troy, MI, US

Year founded

2000