ZipRecruiter

Log In

1

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

Equifax, Inc.

Senior Software Engineer

Saint Louis, MO · On-site

$119.10K - $157K/yr

Bachelor's degree or equivalent experience * 5+ years of software engineering experience * 5+ years experience writing, debugging, and troubleshooting code in mainstream Java, SpringBoot, TypeScript ...

The Giant Bullseye

Senior Java Engineer

Saint Louis, MO

$55.75 - $71/hr

Overview We are looking for a highly skilled Senior Java Engineer to design, develop, and maintain ... quality software solutions * Participate in code reviews, performance optimization, and ...

Equifax, Inc.

Senior Software Engineer

Saint Louis, MO · On-site

$119.10K - $157K/yr

Bachelor's degree or equivalent experience * 5+ years of software engineering experience * 5+ years experience writing, debugging, and troubleshooting code in mainstream Java, SpringBoot, TypeScript ...

next page

Showing results 1-20

People also search for

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 May 29, 2026, the average hourly pay for java software engineer in O'Fallon, MO is $56.50, 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 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.

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 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 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.

More about Java Software Engineer jobs
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 May 2026, with employment types broken down into 73% Full Time, 25% Part Time, and 2% Contract. Highlights an 79% Physical, 1% Hybrid, and 20% Remote job distribution, with an average salary of $117,521 per year, or $56.5 per hour.
Senior Software Engineer

Senior Software Engineer

Equifax, Inc.

Saint Louis, MO • On-site

$119.10K - $157K/yr

Full-time

Medical, Retirement, PTO

Posted 2 days ago

Equifax rating

7.8

Company rating: 7.8 out of 10

Based on 21 frontline employees who took The Breakroom Quiz

Job description

Equifax is where you can power your possible. If you want to achieve your true potential, chart new paths, develop new skills, collaborate with bright minds, and make a meaningful impact, we want to hear from you.
Equifax is seeking creative, high-energy and driven software engineers with hands-on development skills to work on a variety of meaningful projects. Our software engineering positions provide you the opportunity to join a team of talented engineers working with leading-edge technology. You are ideal for this position if you are a forward-thinking, committed, and enthusiastic software engineer who is passionate about technology.
What you'll do
  • Design, develop, and operate high scale applications across the full engineering stack
  • Design, develop, test, deploy, maintain, and improve software.
  • Apply modern software development practices (serverless computing, microservices architecture, CI/CD, infrastructure-as-code, etc.)
  • Work across teams to integrate our systems with existing internal systems, Data Fabric, CSA Toolset.
  • Participate in technology roadmap and architecture discussions to turn business requirements and vision into reality.
  • Participate in a tight-knit, globally distributed engineering team.
  • Triage product or system issues and debug/track/resolve by analyzing the sources of issues and the impact on network, or service operations and quality.
  • Manage sole project priorities, deadlines, and deliverables.
  • Research, create, and develop software applications to extend and improve on Equifax Solutions
  • Collaborate on scalability issues involving access to data and information.
  • Actively participate in Sprint planning, Sprint Retrospectives, and other team activity

What experience you need
  • Bachelor's degree or equivalent experience
  • 5+ years of software engineering experience
  • 5+ years experience writing, debugging, and troubleshooting code in mainstream Java, SpringBoot, TypeScript/JavaScript, HTML, CSS
  • 5+ years experience with Cloud technology: GCP, AWS, or Azure
  • 5+ years experience designing and developing cloud-native solutions
  • 5+ years experience designing and developing microservices using Java, SpringBoot and cloud technologies
  • 5+ years experience deploying and releasing software using Jenkins CI/CD pipelines, understand infrastructure-as-code concepts, Helm Charts, and Terraform constructs

What could set you apart
  • Self-starter that identifies/responds to priority shifts with minimal supervision.
  • Demonstrate a Customer and Product-centric mindset, able to build strong relationships with both internal and external stakeholders including product, business and sales partners.
  • Demonstrated ability to drive engineering excellence in areas of security,quality, reliability, performance, cost optimization, efficiency
  • Generative AI: Experience with Vertex AI and/or working on advanced Generative AI (Gen AI) and agentic applications.
  • Experience designing and developing big data processing solutions using Dataflow/Apache Beam, Bigtable, BigQuery, PubSub, GCS, Composer/Airflow, and others
  • UI development (e.g. HTML, JavaScript, Angular and Bootstrap)
  • Experience with backend technologies such as JAVA/J2EE, SpringBoot, SOA and Microservices
  • Source code control management systems (e.g. SVN/Git, Github) and build tools like Maven & Gradle.
  • Agile environments (e.g. Scrum, XP)
  • Relational databases (e.g. SQL Server, MySQL)
  • Atlassian tooling (e.g. JIRA, Confluence, and Github)
  • Developing with modern JDK (v1.7+)
  • Automated Testing: JUnit, Selenium, LoadRunner, SoapUI

#LI-ES1
#LI-Hybrid
We offer comprehensive compensation and healthcare packages, 401k matching, paid time off, and organizational growth potential through our online learning platform with guided career tracks.
Are you ready to power your possible? Apply today, and get started on a path toward an exciting new career at Equifax, where you can make a difference!
Primary Location:
USA-St. Louis-Lackland
Function:
Function - Tech Dev and Client Services
Schedule:
Full time

What Equifax employees say

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom

Equifax logo

About Equifax

Sourced by ZipRecruiter

As a global data, analytics, and technology company, we play an essential role in the economy by helping companies in diverse industries such as automotive, communications, utilities, financial services, fintech, healthcare, insurance, mortgage, professional services, retail, e-commerce, and government agencies, make critical decisions with greater confidence.

Industry

It services

Company size

10,000+ Employees

Headquarters location

Atlanta, GA, US

Year founded

1899

Social media

FacebookTwitter

View All Equifax Jobs

Apply