ZipRecruiter

Log In

1

Frontend Web Developer Jobs in O Fallon, IL (NOW HIRING)

Sonsoft Inc

UI Mobile Web Developer

Saint Louis, MO

$48.50 - $63.25/hr

At least 2 years experience in Production support and performance engineering. At least 1 year of experience in Responsive Web Design At least 1 year of experience in Single Page Application ...

Equifax, Inc.

Mulesoft Developer

Saint Louis, MO · On-site

... 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 ...

Leidos

Mid-Level Software Engineer

Fairview Heights, IL · On-site

$87K - $157K/yr

Frontend Web Development: UI/UX * NoSQL Database: OpenSearch/Elasticsearch. * Cloud Exposure ... Certifications such as AWS Certified Developer, Security+, SAFe Practitioner or similar. #Chinook ...

Leidos

Mid-Level Software Engineer

Granite City, IL · On-site

$87K - $157K/yr

Frontend Web Development: UI/UX * NoSQL Database: OpenSearch/Elasticsearch. * Cloud Exposure ... Certifications such as AWS Certified Developer, Security+, SAFe Practitioner or similar. #Chinook ...

Leidos

Mid-Level Software Engineer

East Carondelet, IL · On-site

$87K - $157K/yr

Frontend Web Development: UI/UX * NoSQL Database: OpenSearch/Elasticsearch. * Cloud Exposure ... Certifications such as AWS Certified Developer, Security+, SAFe Practitioner or similar. #Chinook ...

Leidos

Mid-Level Software Engineer

Edwardsville, IL · On-site

$87K - $157K/yr

Frontend Web Development: UI/UX * NoSQL Database: OpenSearch/Elasticsearch. * Cloud Exposure ... Certifications such as AWS Certified Developer, Security+, SAFe Practitioner or similar. #Chinook ...

Leidos

Mid-Level Software Engineer

Venice, IL · On-site

$87K - $157K/yr

Frontend Web Development: UI/UX * NoSQL Database: OpenSearch/Elasticsearch. * Cloud Exposure ... Certifications such as AWS Certified Developer, Security+, SAFe Practitioner or similar. #Chinook ...

Leidos

Mid-Level Software Engineer

Roxana, IL · On-site

$87K - $157K/yr

Frontend Web Development: UI/UX * NoSQL Database: OpenSearch/Elasticsearch. * Cloud Exposure ... Certifications such as AWS Certified Developer, Security+, SAFe Practitioner or similar. #Chinook ...

Leidos

Mid-Level Software Engineer

Hartford, IL · On-site

$87K - $157K/yr

Frontend Web Development: UI/UX * NoSQL Database: OpenSearch/Elasticsearch. * Cloud Exposure ... Certifications such as AWS Certified Developer, Security+, SAFe Practitioner or similar. #Chinook ...

Leidos

Mid-Level Software Engineer

Saint Louis, MO · On-site

$87K - $157K/yr

Frontend Web Development: UI/UX * NoSQL Database: OpenSearch/Elasticsearch. * Cloud Exposure ... Certifications such as AWS Certified Developer, Security+, SAFe Practitioner or similar. #Chinook ...

previous pagenext page

Showing results 21-40

All JobsFrontend Web Developer JobsFrontend Web Developer Jobs in O'Fallon, IL

Frontend Web Developer information

See O Fallon, IL salary details

$44.8K

$94.7K

$149.7K

How much do frontend web developer jobs pay per year?

As of Aug 11, 2026, the average yearly pay for frontend web developer in O'Fallon, IL is $94,724.00, according to ZipRecruiter salary data. Most workers in this role earn between $74,600.00 and $109,600.00 per year, depending on experience, location, and employer.

What is the difference between Frontend Web Developer vs Web Designer?

AspectFrontend Web DeveloperWeb Designer
Primary FocusBuilding and coding website interfaces using HTML, CSS, JavaScriptDesigning visual layout, user experience, and aesthetics
SkillsProgramming, coding, debugging, responsive designGraphic design, UX/UI design, creativity
ToolsCode editors, JavaScript frameworks, version controlDesign software like Adobe Photoshop, Sketch
Work EnvironmentOften collaborates with developers and backend teamsWorks closely with clients and developers on visual aspects

While both roles contribute to website creation, Frontend Web Developers focus on coding and functionality, whereas Web Designers concentrate on visual design and user experience. Understanding these differences helps employers and job seekers target the right skills and responsibilities.

What are some common challenges frontend web developers face when working on cross-functional teams?

Frontend Web Developers often collaborate closely with designers, backend developers, and product managers, which can present challenges in aligning on project goals, timelines, and technical constraints. Clear communication and proactive collaboration are essential to ensure design feasibility, resolve integration issues, and manage expectations. Adapting to frequent changes in requirements or design updates is also common, so flexibility and strong problem-solving skills are key for success in this role.

What are the key skills and qualifications needed to thrive as a frontend web developer, and why are they important?

To thrive as a Frontend Web Developer, you need strong skills in HTML, CSS, and JavaScript, along with a solid understanding of responsive design and cross-browser compatibility. Familiarity with frameworks like React or Angular, version control systems such as Git, and a portfolio demonstrating your work are typically required. Attention to detail, effective problem-solving, and collaboration skills help you deliver seamless user experiences and work efficiently with designers and backend developers. These abilities ensure that web applications are visually appealing, highly functional, and maintainable in a fast-evolving digital landscape.

What is a frontend web developer?

Frontend Web Developers are professionals who design and build the user-facing part of websites and web applications. They use technologies like HTML, CSS, and JavaScript to create responsive and interactive interfaces that users interact with directly in their web browsers. These developers work closely with designers and backend developers to ensure that websites are both visually appealing and functionally robust. Their work is essential for delivering a seamless and engaging user experience across different devices and platforms.
What are popular job titles related to Frontend Web Developer jobs in O'Fallon, IL? For Frontend Web Developer jobs in O'Fallon, IL, the most frequently searched job titles are:
What cities near O'Fallon, IL are hiring for Frontend Web Developer jobs? Cities near O'Fallon, IL with the most Frontend Web Developer job openings:
Frontend Web Developer jobs near you
Infographic showing various Frontend Web Developer job openings in O'Fallon, IL as of August 2026, with employment types broken down into 1% Internship, 84% Full Time, 8% Part Time, 1% Temporary, and 6% Contract. Highlights an 82% Physical, 4% Hybrid, and 14% Remote job distribution, with an average salary of $94,724 per year, or $45.5 per hour.

Web Software Developer

Science Applications International Corporation

Scott Air Force Base, IL

Full-time

Re-posted 4 days ago

SAIC rating

7.9

Company rating: 7.9 out of 10

Based on 79 frontline employees who took The Breakroom Quiz

79th of 223 rated it services

Job description

SAIC is seeking a Web Software Developer to support an IT Service Management effort for USTRANSCOM located at Scott Air Force Base (AFB) in Illinois.  The USTC Managed Information Technology Services (MITS) contract is intended to provide strategic, technical, and program management guidance and support services to facilitate the operations and modernization of the combatant command's infrastructure, systems, and applications. This support will be provided to the USTC Command, Control, Communications & Cyber Systems Directorate (TCJ6).

The successful candidate will lead activities related to the USTRANSCOM public website project.

Responsibilities:

  • Design, document, develop (i.e., create and enhance), and maintain public web pages to support USTRANSCOM. 
  • Work with other contractors and Government personnel to integrate legacy web pages into USTRANSCOM's new public website.
  • Provide maintenance, sustainment, and evolutionary upgrades to current USTRANSCOM web pages.
  • Adhere to Government and industry web and security standards. 
  • Complete minor adjustments coordination with the content owner when required.
  • Assist the webmaster in managing the USTRANSCOM Gatekeeper program by providing administrative oversight and access to essential services restricted to Gatekeepers.

This position is for Monday through Friday, normal business hours.  However, employee may be required to provide after-hours and weekend support during planned or emergency events.

SAIC is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.

Qualifications
Required Qualifications:

  • 10+ years of experience.
  • DoD Top Secret clearance with SCI Eligibility.
  • CompTIA Security+ Certification.
  • Experience with Node.js and React.
  • Experience with AppStream and Confluence.
  • Experience in JavaScript and HTML
  • Experience with Content Management Systems (specifically Strapi).
  • Experience with AWS Cloud.
  • Knowledge of implementing software in a cloud environment that adheres to DOD Security guidelines.  
  • Experience researching and writing excellent documentation and examples for technical personnel. 
  • Experience with MS Office toinclude Word, PowerPoint,Visio, Project and Excel.  
  • Technical writing and documentation skills.  
  • Configuration and change management experience working directly with/for a Government customer.

Desired Qualifications:

  • BS/BA.
  • AWS Cloud Practitioner Certification.
  • Experience working with ServiceNow.
  • Experience working with Jira.

What SAIC employees say

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom

Apply