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

w3r Consulting

Senior Software Engineer (Java)

O Fallon, MO · On-site

$116K - $153K/yr

Angular/React front-end development * REST/SOAP APIs and enterprise application development ... Cloud-Native Architecture & DevOps * Cloud-Native / AWS or Other Cloud Platforms * CI/CD and ...

The Timberline Group

Angular .Net Developer

Saint Louis, MO · On-site +1

$53.25 - $65.25/hr

This is a Mid to Senior-level full stack Software Developer position. This team is an Agile team that specializes in front end technologies as well as mobile application development. The team creates ...

Eliassen Group

Senior Software Engineer

Saint Louis, MO · On-site

$85 - $95/hr

Louis, MO Our client seeks a hands-on Senior Software Engineer to modernize and maintain a mission ... Familiarity with micro-frontend architecture using module federation is a plus. * Background in ...

New

Eliassen Group

Senior Software Engineer

Saint Louis, MO · On-site

$85 - $95/hr

Louis, MO Our client seeks a hands-on Senior Software Engineer to modernize and maintain a mission ... Familiarity with micro-frontend architecture using module federation is a plus. * Background in ...

New

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology ... front-end frameworks, and/or relational database technologies. - Event Driven Framework, Full APIs ...

MasterCard

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology ... front-end frameworks, and/or relational database technologies. - Event Driven Framework, Full APIs ...

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All JobsFrontend Developer JobsSenior Frontend Developer JobsSenior Frontend Developer Jobs in O'Fallon, MO

Senior Frontend Developer information

See O Fallon, MO salary details

$36.5K

$124.5K

$169.8K

How much do senior frontend developer jobs pay per year?

As of Aug 22, 2026, the average yearly pay for senior frontend developer in O'Fallon, MO is $124,481.00, according to ZipRecruiter salary data. Most workers in this role earn between $107,600.00 and $141,300.00 per year, depending on experience, location, and employer.

What is a senior frontend developer?

Senior Frontend Developers are experienced software professionals who specialize in building and maintaining the user-facing parts of web applications. They work with technologies like HTML, CSS, and JavaScript frameworks (such as React, Angular, or Vue.js) to create responsive, interactive, and visually appealing interfaces. In addition to coding, they often lead frontend projects, mentor junior developers, and collaborate with designers and backend engineers to ensure seamless user experiences. Their role also includes optimizing web performance and adhering to best practices in accessibility and usability.

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

To thrive as a Senior Frontend Developer, you need advanced proficiency in HTML, CSS, JavaScript, and modern frameworks like React or Angular, along with a relevant degree or equivalent experience. Familiarity with version control systems (such as Git), frontend build tools, testing libraries, and possibly certifications like AWS Certified Developer are typically important. Strong problem-solving abilities, effective communication, and a collaborative mindset are crucial soft skills for excelling in this role. These skills ensure the delivery of high-quality, scalable user interfaces that meet both technical and business requirements.

What are some common challenges senior frontend developers face when leading projects, and how can they address them?

Senior Frontend Developers often encounter challenges such as aligning cross-functional teams, managing technical debt, and maintaining code quality while meeting deadlines. To address these, effective communication with designers, backend engineers, and product managers is crucial. Adopting best practices like code reviews, thorough documentation, and utilizing modern frameworks helps streamline collaboration and ensure maintainability. Additionally, mentoring junior developers and promoting knowledge sharing within the team can foster a more efficient and cohesive work environment.

What is the difference between Senior Frontend Developer vs Frontend Engineer?

AspectSenior Frontend DeveloperFrontend Engineer
Required CredentialsBachelor's in CS or related field, extensive experienceBachelor's in CS or related field, strong technical skills
Work EnvironmentCollaborates with designers, backend teams, project managersFocuses on building and optimizing frontend applications
Industry UsageCommon in tech companies, startups, agenciesUsed interchangeably with Senior Frontend Developer in many contexts
Search & Comparison IntentUnderstanding senior-level responsibilities and skillsClarifying role scope and technical focus

While both roles require strong frontend skills and similar educational backgrounds, a Senior Frontend Developer typically has more leadership responsibilities and project oversight. A Frontend Engineer may focus more on technical implementation and architecture. The terms are often used interchangeably, but understanding the nuances helps in job searches and role expectations.

What are the most commonly searched types of Frontend Developer jobs in O'Fallon, MO?

The most popular types of Frontend Developer jobs in O'Fallon, MO are:

What are popular job titles related to Senior Frontend Developer jobs in O'Fallon, MO?

For Senior Frontend Developer jobs in O'Fallon, MO, the most frequently searched job titles are:

What cities near O'Fallon, MO are hiring for Senior Frontend Developer jobs?

Cities near O'Fallon, MO with the most Senior Frontend Developer job openings:

Senior Frontend Developer jobs near you
Infographic showing various Senior Frontend Developer job openings in O'Fallon, MO as of August 2026, with employment types broken down into 79% Full Time, 8% Part Time, and 13% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $124,481 per year, or $59.8 per hour.

Sr Full Stack Node.js developer

Judge Group, Inc.

Clarkson Valley, MO • On-site

$60 - $80/hr

Other

Posted 22 days ago

Job description

Location: Clarkson Valley, MO Salary: $60.00 USD Hourly - $80.00 USD Hourly Description: Our client is currently seeking a Sr Full Stack Node.js developer
Top must have skills:
A minimum of 10 years of experience
JavaScript - 10+ years
Nodejs - 10+ years
Reactjs - 5+ years
AWS - 4+ years
PostgreSQL - 5+ years
Job Description:
BS/MS degree in Computer Science, similar technical field of study or equivalent practical experience.
8+ years of experience as a JavaScript full stack developer
Strong experience in Reactjs, Nodejs and Typescript
Good programmer - able to write clean, maintainable, well-structured code, follow popular paradigms, good practices, and local guidelines.
Experience in Cloud (preferably AWS - Lambdas, S3, SQS, SNS, Kafka, Step Functions).
Experience with front-end web technologies (e.g., HTML5, CSS3, JavaScript)
Unit testing using Jest, react-testing-library
Experience building highly scalable Rest APIs hosted on could environment
Strong Experience designing databases in PostgreSQL
Product-oriented - able to take a deep dive into the business domain, and partner with product experts to suggest improvements, and pragmatic solutions,
Experience in working in a product-oriented agile organization
Some flexibility to work with a global team across time-zones
Problem-solving skills, proactivity and being a team player
Willingness to learn, develop, & innovate
By providing your phone number, you consent to: (1) receive automated text messages and calls from the Judge Group, Inc. and its affiliates (collectively "Judge") to such phone number regarding job opportunities, your job application, and for other related purposes. Message & data rates apply and message frequency may vary. Consistent with Judge's Privacy Policy, information obtained from your consent will not be shared with third parties for marketing/promotional purposes. Reply STOP to opt out of receiving telephone calls and text messages from Judge and HELP for help.
Contact:
This job and many more are available through The Judge Group. Please apply with us today!

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