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Front End Software Engineer Jobs in O Fallon, IL

Omni Federal

Software Engineer

Saint Louis, MO · On-site

Job Title: Software Engineer Location: St. Louis, MO Security Clearance: Active TS/SCI (or SCI ... Experience as a full-stack developer, including Web Services, Database, and Front-End Development

BAI

Software Engineer

Saint Louis, MO · On-site +1

$75K - $95K/yr

Software Engineer Reports To: Manager, Software Engineering BAI and RMA have come together as ... Solid understanding of front-end technologies including HTML, CSS, JavaScript, and React.JS, and ...

Husch Blackwell Llp

Senior Software Engineer

Saint Louis, MO · On-site +1

$114K - $151K/yr

The Senior Software Engineer designs, builds, and maintains the technical systems and application ... Partner with the Information Engineers on shared front-end concerns, providing architectural ...

Husch Blackwell LLP

Senior Software Engineer

Saint Louis, MO · On-site +1

$114K - $151K/yr

The Senior Software Engineer designs, builds, and maintains the technical systems and application ... Partner with the Information Engineers on shared front-end concerns, providing architectural ...

Apex Systems

Software Engineer II

Bridgeton, MO · On-site

$92K - $126K/yr

Job#: 3046571 Software Engineer II Location: Bridgeton, Missouri (Onsite) Role Overview We are ... Experience with front-end technologies like TypeScript or JavaScript. * Familiarity with tools such ...

BAI

Advanced Software Engineer

Saint Louis, MO · On-site +1

$85K - $115K/yr

Advanced Software Engineer Chicago, IL Reports To: Director, Product Development & Operations BAI ... Solid understanding of front-end technologies including HTML, CSS, JavaScript, and React.JS, and ...

UnitedHealth Group

Senior Software Engineer

Bridgeton, MO · On-site

$116K - $153K/yr

Position Summary As a Sr. Software Engineer on the MCDS (Multi Channel Claim Distribution Platform ... Drive front-end modernization initiatives, including CAS portal service enhancements and UI ...

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All JobsFront End Software Engineer JobsFront End Software Engineer Jobs in O'Fallon, IL

Front End Software Engineer information

See O Fallon, IL salary details

$56.9K

$129.6K

$184.7K

How much do front end software engineer jobs pay per year?

As of Aug 28, 2026, the average yearly pay for front end software engineer in O'Fallon, IL is $129,597.00, according to ZipRecruiter salary data. Most workers in this role earn between $105,400.00 and $150,600.00 per year, depending on experience, location, and employer.

What is a front end software engineer?

A front end software engineer or developer designs websites and applications, often using JavaScript and CSS, to ensure that client-side software can run them optimally. As a front end software engineer, you must evaluate system design, networking, and data compression to ensure a website or application is efficient and can handle high-volume traffic. Your focus is on web usability and a seamless user experience. Qualifications include a bachelor’s degree in information technology or computer science. Companies expect a front end software engineer to understand JavaScript, CSS, and HTML. You can gain additional employment opportunities with knowledge of C++, AJAX, and Python.

What does a front end software engineer do?

A Front End Software Engineer is responsible for designing, developing, and maintaining the user-facing parts of websites and web applications. They use technologies like HTML, CSS, and JavaScript to create interactive and visually appealing interfaces that users interact with directly. Additionally, they work closely with designers and back end developers to ensure seamless integration and optimal user experiences. Their role often involves optimizing web performance, ensuring cross-browser compatibility, and implementing responsive design for various devices.

What are the key skills and qualifications needed to thrive as a front end software engineer?

To thrive as a Front End Software Engineer, you need strong proficiency in HTML, CSS, JavaScript, and modern frameworks such as React or Angular, often supported by a relevant degree or equivalent experience. Familiarity with version control systems like Git, responsive design tools, and testing frameworks is typically required. Excellent problem-solving, attention to detail, and effective communication skills help you collaborate with designers and back-end engineers. These abilities ensure you can build user-friendly, visually appealing, and high-performing web applications that meet both technical and business requirements.

How does a front end software engineer typically collaborate with designers and back-end developers during a project?

Front End Software Engineers work closely with designers to translate UI/UX mockups into interactive, responsive web interfaces, ensuring the final product aligns with the intended user experience. They also collaborate with back-end developers to integrate APIs and data services, often participating in joint planning sessions and code reviews to align on functionality and performance requirements. Regular communication, using tools like Jira or Slack, and participation in agile ceremonies like stand-ups and sprint planning, are standard practices to keep workflows smooth and ensure alignment across teams.

What is the difference between Front End Software Engineer vs Web Developer?

AspectFront End Software EngineerWeb Developer
Primary FocusBuilding and optimizing user interfaces and client-side applicationsDeveloping websites and web applications, including both front-end and back-end tasks
Skills & CertificationsHTML, CSS, JavaScript, frameworks (React, Angular), UI/UX designHTML, CSS, JavaScript, sometimes back-end languages (PHP, Python), CMS platforms
Work EnvironmentTech companies, startups, agencies focusing on user experienceWeb development agencies, freelance, corporate websites

While both roles involve web development, a Front End Software Engineer specializes in creating and optimizing the visual and interactive aspects of applications, often working with advanced frameworks. Web Developers may handle broader tasks, including back-end development, and may work on entire websites. The choice depends on whether you prefer a specialized front-end focus or a more general web development role.

More about Front End Software Engineer jobs

What are the most commonly searched types of Front End Software Engineer jobs in O'Fallon, IL?

The most popular types of Front End Software Engineer jobs in O'Fallon, IL are:

What cities near O'Fallon, IL are hiring for Front End Software Engineer jobs?

Cities near O'Fallon, IL with the most Front End Software Engineer job openings:

Front End Software Engineer jobs near you
Infographic showing various Front End Software Engineer job openings in O'Fallon, IL as of August 2026, with employment types broken down into 90% Full Time, 5% Part Time, and 5% Contract. Highlights an 83% In-person, 5% Hybrid, and 12% Remote job distribution, with an average salary of $129,597 per year, or $62.3 per hour.

Software Engineer - Frontend

Florissant, MO • On-site

Augustine Institute Inc
Colleges, Universities, and Professional Schools • 51 - 200 employees
Learn more about Augustine Institute Incexternal

Full-time

Re-posted 21 days ago

Job description

Position: Software Engineer - Frontend

Schedule: Full Time

Reporting to: VP Technology


Position Summary

The Augustine Institute seeks a Senior Frontend Engineer to design, build, and maintain the user-facing experiences across its digital platforms. This role is primarily responsible for establishing foundational front-end architecture and design systems for customer-facing platforms, setting code-level implementation standards, and working closely with Product to deliver high-quality, consistent UI experiences across the Augustine Institute’s portfolio of brands.

Specific duties are listed below, but may not be all-inclusive.


Qualifications

Significant, demonstrable, and proven experience in:

  • Building, implementing, and maintaining front-end architecture and design systems that yield consistent UX interactions and high-quality UI aesthetics
  • Iterative development and designing experiences behind feature flags for graduated rollout and testing
  • Data-driven approaches to optimizing user experiences across multiple applications
  • React + Next.js for web development
  • React Native + Expo for mobile development
  • Tailwind CSS
  • Building multi-profile / sub-account experiences (e.g., family, organization, and children’s profiles)
  • Deploying front-end code at enterprise and multi-hundred-thousand user scale (e.g., Cloudflare Pages, Vercel, AWS Amplify, ECS/Fargate, EC2, S3 + CloudFront)
  • Managing llms.txt standards and designing with AI discoverability (“AI SEO”) in mind alongside traditional search SEO


Experience with or strong understanding of (preferred):

  • LaunchDarkly or similar feature-flag tools
  • New Relic or similar observability and monitoring tools
  • Front-end tracking tools such as Mixpanel
  • Video infrastructure integration (Mux or similar) in the front end
  • Designing group or family-based features including shared experiences and watch parties
  • Learning Management System (LMS) platforms and their core UI components


  • Bachelor’s degree or equivalent practical experience


Skills and Abilities

  • Ability to think cross-product, creating unique experiences for each brand (Formed, Amen, etc.) while sharing the same underlying core elements that make it feel like “the Augustine Institute”
  • Ability to design UX/UI across distinct use cases built on the same core platform, adapting to different user contexts and personas
  • Ability to understand when users need onboarding support and design in-app guides accordingly
  • Experience maintaining UI code and documentation that enables both human collaboration and AI-assisted development, while ensuring AI adheres to design system and architectural standards
  • Strong ability to perform quality assurance and security testing on all front-end code
  • Ability to identify when niche specialists are needed and effectively delegate work to contractors, ensuring output meets quality standards and includes sufficient knowledge transfer for ongoing in-house maintenance
  • Commitment to demonstrate consistently the Augustine Institute’s core values including:
    • Humility – We serve the Augustine Institute Mission with humility and a service mind-set.
    • Collaboration – We work together as a united Body of Christ.
    • Innovation – We encourage being creative and demonstrating a clever mindset.
    • Excellence – We strive in everything we do to win souls for Christ.


Physical Demands

While performing the duties of this job, the employee is regularly required to perform stooping, kneeling, crouching, reaching, standing, walking, lifting, typing and use of office equipment, talking, hearing, seeing, and repetitive motions.


Work Environment

While performing the duties of this job, the employee will typically work in a climate-controlled office setting.


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