Top 81 Java developer Jobs in O'fallon, Il

Software Engineer - Intermediate
Equifax —St. Louis, MO
- Full-time
- Hybrid work
- Azure
- Mid-level
- Office
- Health insurance
- Paid time off
Software Developer / Application & Web Support Lead
Computer World Services —Scott AFB, IL
- $110,000 - $140,000 a year
- Full-time
- Residential
- Java
- SQL
1d
MES Application Developer
FuseGlobal —St. Louis, MO
- Up to $72 an hour
- 7 years
- Azure
- SQL
- Disability insurance
- Health insurance
Quick Apply
Software Developer III - DEW/Electrical Engineering Software (C#, Big Data)
National Information Solutions Cooperative (NISC) —St. Louis, MO
- Hybrid work
- Computer science
- Computer Science
- Research
- Health savings account
- Paid holidays
7d
Software Development Lifecycle
Neopoint Consulting —St. Louis, MO
- Oracle
- Mid-level
- Java
HRIS Developer
Sovereign Technologies —St. Louis, MO
- Computer science
- Computer Science
- Mid-level
Senior Software Engineer
Omni Federal —St. Louis, MO
- Full-time
- Computer science
- Computer Science
- Bachelor of Science
Quick Apply
Spark or Java Developer
Absolute Business Solutions Corp —St. Louis, MO
- $150,000 - $275,000 a year
- 8 hour shift
- 5 years
- Military encouraged
- Experience equivalent to degree accepted
- Tuition reimbursement
- Paid time off
Mid Software Engineer (SFA)
Kentro —St. Louis, MO
- Full-time
- Computer Science
- 5 years
- Research
- Health insurance
- Tuition reimbursement
12d
Software Engineer (TS/SCI Clearance Required)
North Point Technology —St. Louis, MO
- Writing skills
- Mid-level
- Java
Quick Apply
Senior Software Engineer
Trevity LLC —St. Louis, MO
- Full-time
- Azure
- PMP
- System design
Quick Apply
Senior Level Software Developer
DCS Corp —St. Louis, MO
- Computer science
- Azure
- Computer Science
Senior Software Engineer - In Vitro Diagnostics
WilsonHCG —St. Louis, MO
- 7 years
- Computer Science
- System design
Quick Apply
6d
Senior Software Engineer, Core Experiences - St. Louis, MO, USA
Speechify —St. Louis, MO
- $140,000 - $200,000 a year
- Remote
- System design
- Senior level
- Negotiation
10d
Software Development Engineer II – Back-End (Mission-Focused | ArcGIS)
Esri —St. Louis, MO
- $97,240 - $162,240 a year
- Azure
- Computer Science
- System design
- Relocation assistance
DevOps Engineer
Absolute Business Solutions Corp —St. Louis, MO
- $180,000 - $225,000 a year
- 8 hour shift
- Hybrid work
- Computer science
- Mid-level
- Military encouraged
- Paid time off
- 401(k) matching
Guidewire PolicyCenter Sr Developer
Deloitte —St. Louis, MO
- $116,200 - $229,100 a year
- Full-time
- Azure
- Oracle
- Up to 50% travel
Principal Software Engineer
Trevity LLC —St. Louis, MO
- Full-time
- Azure
- Java
- Master's degree
Quick Apply
Lead DevOps Engineer, Cloud Products and Patterns
London Stock Exchange Group —St. Louis, MO
- Full-time
- Computer science
- Azure
- Computer Science
Mainframe Application Programmer Assoc Manager
Accenture —St. Louis, MO
- $68,300 - $218,800 a year
- Full-time
- Hybrid work
- 5 years
- Java
- Analysis skills
- Paid holidays
- Disability insurance

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Software Engineer - Intermediate

Equifax -
St. Louis, MO

Apply Now

Job Details

Full-time

Benefits

Health insurance
Paid time off
401(k) matching

Qualifications

Performance tuning
Software engineering
Test Automation Development (Quality assurance practices)
CSS
Engineering development testing
Quality control product testing
Tooling
System performance optimization
JavaScript
Web applications
Front-end component implementation
AI-driven automation
Scalability and Performance Testing (system development)
Developer tools
Design (software development lifecycle)

Full Job Description

St. Louis
United States of America
Technology
Full time
6/15/2026
J00176451

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Manage Preferences

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, AI-augmented, and enthusiastic software engineer who is passionate about leveraging modern tools to accelerate delivery and solve complex problems.

T o adhere to our corporate location policies, this resource will be required to be local to the surrounding St.Louis, MO.

This position does not offer immigration sponsorship (current or future) including F-1 STEM OPT extension support.

What you will do

Perform general application development activities, including unit testing, code deployment to development environment, and technical documentation. Leverage AI-assisted coding tools (e.g., GitHub Copilot) to optimize development velocity and code quality.
Participates in estimation process, use case specifications, reviews of test plans and test cases, requirements, and project planning. Diagnose and resolve performance issues.
Documents code/processes so that any other developer is able to dive in with minimal effort.
Develop, and operate high-scale applications from the backend to UI layer, focusing on operational excellence, security, and scalability.
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.
Actively explore and advocate for the integration of generative AI and automation tools into the team's daily workflows to eliminate repetitive tasks.
Participate in technology roadmap and architecture discussions to turn business requirements and vision into reality. Participate in a tight-knit engineering team employing agile software development practices.
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.
Able to write, debug, and troubleshoot code in mainstream open-source technologies. Lead effort for Sprint deliverables, and solve problems with medium complexity.

What experience you need

Bachelor's degree or equivalent experience.
2+ years experience working with software design and Java, Python, and Javascript programming languages.
Experience integrating AI development accelerators/LLM tools into your daily coding, debugging, and testing workflows.
2+ years experience with software build management tools like Maven or Gradle.
2+ years experience with HTML, CSS, and frontend/web development.
2+ years experience with software testing, performance, and quality engineering techniques and strategies.
2+ years experience with Cloud technology: GCP, AWS, or Azure

What could set you apart

AI-Augmented Developer: Proven track record of using generative AI tools to safely accelerate code generation, automate documentation, and optimize legacy refactoring while maintaining strict data security and code integrity guidelines.
Quality-First Engineer: Owns product outcomes end-to-end; expert at measuring and upholding high-quality standards across QA, UAT, and PROD using automated QE tools and JUnit.
Java Specialist: Advanced development in Java 17, SpringBoot, and Microservices/SOA, managing source control via Git/GitHub and builds through Maven/Gradle.
Independent Agile Practitioner: Self-directed contributor experienced in navigating priority shifts with minimal supervision within CI/CD (Jenkins) and Atlassian ecosystems.
Cloud & Innovation Forward: Cloud-ready professional (GCP/AWS/Azure Certification preferred) with a passion for staying ahead of emerging tech trends and modernizing software delivery models.

#LI-Hybrid

#LI-ES1

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!

Who is Equifax?

At Equifax, we believe knowledge drives progress. As a global data, analytics and technology company, we play an essential role in the global economy by helping employers, employees, financial institutions and government agencies make critical decisions with greater confidence.

We work to help create seamless and positive experiences during life’s pivotal moments: applying for jobs or a mortgage, financing an education or buying a car. Our impact is real and to accomplish our goals we focus on nurturing our people for career advancement and their learning and development, supporting our next generation of leaders, maintaining an inclusive and diverse work environment, and regularly engaging and recognizing our employees. Regardless of location or role, the individual and collective work of our employees makes a difference and we are looking for talented team players to join us as we help people live their financial best.

Equifax is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other legally protected characteristics.

Apply Now

Refine Your Search

java developer jobs in o'fallon, il

Software Engineer - Intermediate

Software Developer / Application & Web Support Lead

MES Application Developer

Software Developer III - DEW/Electrical Engineering Software (C#, Big Data)

Software Development Lifecycle

HRIS Developer

Senior Software Engineer

Spark or Java Developer

Mid Software Engineer (SFA)

Software Engineer (TS/SCI Clearance Required)

Senior Software Engineer

Senior Level Software Developer

Senior Software Engineer - In Vitro Diagnostics

Senior Software Engineer, Core Experiences - St. Louis, MO, USA

Software Development Engineer II – Back-End (Mission-Focused | ArcGIS)

DevOps Engineer

Guidewire PolicyCenter Sr Developer

Principal Software Engineer

Lead DevOps Engineer, Cloud Products and Patterns

Mainframe Application Programmer Assoc Manager

I want to receive the latest job alert for java developer in o'fallon, il

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