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

Palnar

Backend Java Engineer W/IBM MQ Exp

O Fallon, MO · On-site

$47.25 - $61.25/hr

Senior Software Development Engineer (Specialty) - Level 7 Location: O'Fallon, MO/Hybrid Duration: 12 months * Java * Proficient in core java * Spring boot preferred. * Messaging services * MQ's or ...

Jobs for Humanity

Java Backend Developer

O Fallon, MO · On-site

$47.25 - $61.25/hr

Design, develop, and maintain backend applications using Java 8 and the Spring Framework. * Build ... CI/CD and DevOps practices. * Unit testing (JUnit or Mockito). * Bachelor's degree in computer ...

Sigmaways Inc

Java Backend Developer

Saint Louis, MO · On-site

$49 - $63.75/hr

Excellent capabilities in Java applications and Object Oriented concepts * Deep functional ... Proficient oral and written communication skillsBS or MS in engineering, com * Hadoop - Nice to ...

Apex Systems

Sr Software Engineer

Saint Louis, MO · On-site

$80/hr

Senior Java Full Stack Engineer Location: St. Louis, MO (Hybrid, 4 Days Onsite)/Remote can be considered Duration: 12-18 months with potential extension Pay rate: $80/hr on W2 Note: We are not able ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

We are looking for a Senior AI Java Engineer (Hands-on IC) to deliver AI-driven capabilities across our roadmap. This is a builder role requiring strong hands-on engineering-owning critical ...

CYNET SYSTEMS

Java Full Stack Developer

Saint Louis, MO · On-site

$50/hr

Java/JEE, Spring, Spring boot, REST/SOAP web services, Hibernate, SQL, Tomcat, Application servers (WebSphere), SONAR, Agile, AJAX, Jenkins. * Skills in UML, application designing/architecture ...

The Timberline Group

Java Full Stack Developer

Saint Louis, MO · On-site +1

$51 - $65.75/hr

Full Stack Developer to join the Software Engineering team. This individual will be responsible for ... Java, Scala, etc. and dynamic languages such asnode.js, Python, Groovy • Experience with ...

Arka Infotech Inc

Sr. Scala Developer

Saint Louis, MO

$53 - $70/hr

Louis, Missouri 08-03-2015 Senior Scala Developer w/hands-on experience writing Scala architecture on OS X and AWS models -- experience coding in Clojure, Java, and/or Python also a plus. Client is ...

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Senior Java Developer information

See O Fallon, MO salary details

$10

$58

$80

How much do senior java developer jobs pay per hour?

As of Sep 9, 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:

Senior Java Developer jobs near you
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.

Java Angular Full Stack Engineer

Saint Louis, MO • On-site

Stellar IT Group
See more jobs at Stellar IT Groupexternal

$51 - $65.75/hr

Contractor

Re-posted 21 days ago

Job description

Overview:
Job Title: Java Angular Full Stack Engineer
Location: Remote
Type: 6-month contract-to-hire
Overview:
Seeking a Senior/Lead Full Stack Engineer with strong Java backend and Angular front-end skills. Must have experience in scaled Agile (SAFe) environments and the ability to mentor junior developers.
Key Responsibilities:
  • Develop full stack applications (Java backend, Angular front end).
  • Lead and mentor junior developers.
  • Build and maintain solutions leveraging AWS, Kafka, and Postgres.
  • Utilize GitLab for CI/CD workflows.
  • Collaborate in SAFe Agile ceremonies and delivery.

Qualifications:
  • Strong Java and Angular experience (backend-heavy acceptable).
  • Proven experience in SAFe Agile (must differentiate from traditional Agile).
  • GitLab expertise required.
  • Amazon Q experience preferred.
  • AWS, Kafka, Postgres experience required.

Skills:
JAVA,AMAZON,GITLAB,SAFE

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