1

React Js Developer Jobs in St Louis, MO (NOW HIRING)

Advanced Software Engineer

Saint Louis, MO · On-site +1

$85K - $115K/yr

... DevOps. * Proficiency in C# and other .NET-based languages, with experience maintaining both legacy ... Solid understanding of front-end technologies including HTML, CSS, JavaScript, and React.JS, and ...

Senior Software Engineer

Saint Louis, MO · On-site

$119K - $157K/yr

... React.js) and backend technologies (Java, Spring, Spring Boot). * Ability to architect and ... Experience as a full stack developer to include Web Services, Database and Front-End Development

Senior Node.js Developer

Saint Louis, MO · On-site

$49.75 - $64.50/hr

We are seeking a Senior Node.js Developer to lead backend development for security and vulnerability remediation programs. The ideal candidate has strong Node.js expertise, experience working with ...

Lead Salesforce Developer

Saint Louis, MO · On-site +1

$54 - $71.50/hr

... Software Engineering team. As a Salesforce Technical Lead, you will help deliver our digital ... js framework (e.g., React or Angular) • Working experience in AppExchange App Development and ...

Frontend Engineer

Saint Louis, MO · On-site

$45 - $50/hr

Pay Range: $45hr - $50hr Requirement/Must Have: * 1+ years of experience in React/Next.js. * 1+ ... We deliver agile, scalable talent solutions across IT, engineering, life sciences, clinical, and ...

Showing results 41-60

React Js Developer information

See St Louis, MO salary details

$41.3K

$107.3K

$151.2K

How much do react js developer jobs pay per year?

As of Sep 2, 2026, the average yearly pay for react js developer in St. Louis, MO is $107,346.00, according to ZipRecruiter salary data. Most workers in this role earn between $101,100.00 and $117,600.00 per year, depending on experience, location, and employer.

What is a React JS developer?

A React JS Developer is a software engineer who specializes in building user interfaces and web applications using the React JavaScript library. They are responsible for developing reusable components, managing application state, and ensuring high-performance, responsive designs. React JS Developers often work closely with designers and backend developers to deliver seamless user experiences. Their expertise includes JavaScript, HTML, CSS, and modern front-end development tools.

What are the key skills and qualifications needed to thrive as a React JS developer?

To thrive as a React JS Developer, you need a strong grasp of JavaScript, HTML, CSS, and modern React concepts such as hooks, state management, and component lifecycle, typically supported by a degree in computer science or relevant experience. Familiarity with version control systems like Git, build tools such as Webpack or Babel, and testing frameworks like Jest is commonly required. Problem-solving, effective communication, and teamwork are crucial soft skills that distinguish successful developers in this role. These abilities ensure efficient development of scalable, maintainable applications and smooth collaboration within cross-functional development teams.

What are some common challenges faced by React JS developers when integrating with backend APIs?

React JS Developers often encounter challenges such as managing asynchronous data flows, handling errors gracefully, and ensuring smooth communication between the frontend and backend services. Debugging issues related to inconsistent API responses or cross-origin resource sharing (CORS) can also be common. Staying up-to-date with evolving RESTful or GraphQL API standards and ensuring secure authentication and data validation are essential for successful integration.

What is the difference between React Js Developer vs Front-End Developer?

AspectReact Js DeveloperFront-End Developer
Required SkillsProficiency in React.js, JavaScript, HTML, CSSHTML, CSS, JavaScript, frameworks like Angular or Vue
Work EnvironmentFocus on building user interfaces with ReactDeveloping and maintaining websites/apps across various frameworks
Industry UsageCommon in companies using React for UI developmentBroader role across multiple front-end technologies

React Js Developers specialize in building user interfaces using React.js, while Front-End Developers work across various frameworks and technologies to create complete website or app front-ends. React Js Developers focus more on React-specific skills, whereas Front-End Developers have a broader skill set applicable to multiple frameworks.

What are popular job titles related to React Js Developer jobs in St. Louis, MO?

For React Js Developer jobs in St. Louis, MO, the most frequently searched job titles are:

What job categories do people searching React Js Developer jobs in St. Louis, MO look for?

The top searched job categories for React Js Developer jobs in St. Louis, MO are:

What cities near St. Louis, MO are hiring for React Js Developer jobs?

Cities near St. Louis, MO with the most React Js Developer job openings:

Infographic showing various React Js Developer job openings in St. Louis, MO as of August 2026, with employment types broken down into 100% Contract. Highlights an 100% In-person job distribution, with an average salary of $107,346 per year, or $51.6 per hour.

Software Engineering Advisor- Hybrid

Cigna

Saint Louis, MO • On-site

Full-time

Re-posted 14 days ago


Cigna Healthcare rating

8.3

Company rating: 8.3 out of 10

Based on 241 frontline employees who took The Breakroom Quiz

40th of 898 rated healthcare providers


Job description

Cigna-Evernorth Services Inc. seeks a Software Engineering Advisor for the St. Louis, MO location to improve application quality, reliability, and increase productivity by implementing tools and standard processes.
Responsibilities:
• Serve as the technology go-to person on any technical questions, resolve complex technical issues, and ensure quality is maintained by following development patterns and standards.
• Design and build prototypes.
• Prepare deployment and post deployment plans to support the conversion while interacting with architects, technical project managers, and developers to ensure that application solutions meet customer needs.
• Define requirements and conceptualize solutions on related projects or work assignments and create process flows and diagrams necessary to assist the requirements gathering process.
• Hybrid work schedule.
Qualifications:
• Bachelor's degree in Computer Science and 3 years of experience.
• Must have experience with: acting as a Software Engineering Team Lead;
• SDLC including architecture, development, testing, CI/CD, deployment, and production support; building responsive web applications using React.js;
• React Hooks; Component life cycle management using both Context API and Redux State Management;
• JSX; Modern JavaScript (ES6+); CSS; Responsive UI development; Material UI component library;
• Frontend testing using both React Testing Library and Snapshot testing; accessibility testing;
• Modern web accessibility practices;
• Designing and developing RestfulAPIs using both Java and Spring Boot;
• Integration testing with Junit;
• Designing and maintain application data stores using both PostgreSQL and MongoDB;
• Implementing CI/CD pipelines using GitHub Actions, Jenkins, and ArgoCD;
• Deploying and operating applications in AWS cloud environments;
• Integrating applications with enterprise platforms including both LaunchDarkly for feature flag management and Okta for identity and access management; and,
• Diagnosing and resolving production issues both Splunk and Dynatrace.
If you will be working at home occasionally or permanently, the internet connection must be obtained through a cable broadband or fiber optic internet service provider with speeds of at least 10Mbps download/5Mbps upload.
About Evernorth Health Services
Evernorth Health Services, a division of The Cigna Group, creates pharmacy, care and benefit solutions to improve health and increase vitality. We relentlessly innovate to make the prediction, prevention and treatment of illness and disease more accessible to millions of people. Join us in driving growth and improving lives.
Qualified applicants will be considered without regard to race, color, age, disability, sex, childbirth (including pregnancy) or related medical conditions including but not limited to lactation, sexual orientation, gender identity or expression, veteran or military status, religion, national origin, ancestry, marital or familial status, genetic information, status with regard to public assistance, citizenship status or any other characteristic protected by applicable equal employment opportunity laws.
If you need a reasonable accommodation to complete the online application process, please email seeyourself@thecignagroup.com for assistance. Please note that this email inbox is dedicated to accommodation requests only and cannot provide application updates or accept resumes.
The Cigna Group has a tobacco-free policy and reserves the right not to hire tobacco/nicotine users in states where that is legally permissible. Candidates in such states who use tobacco/nicotine will not be considered for employment unless they enter a qualifying smoking cessation program prior to the start of their employment. These states include: Alabama, Alaska, Arizona, Arkansas, Delaware, Florida, Georgia, Hawaii, Idaho, Iowa, Kansas, Maryland, Massachusetts, Michigan, Nebraska, Ohio, Pennsylvania, Texas, Utah, Vermont, and Washington State.
Qualified applicants with criminal histories will be considered for employment in a manner consistent with all federal, state and local ordinances.

What Cigna Healthcare employees say

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom


Cigna logo

About Cigna

Sourced by ZipRecruiter

Cigna Corporation exists to improve lives. We are a global health service company dedicated to improving the health, well-being and peace of mind of those we serve. Together, with colleagues around the world, we aspire to transform health services, making them more affordable and accessible to millions. Through our unmatched expertise, bold action, fresh ideas and an unwavering commitment to patient-centered care, we are a force of health services innovation. When you work with us, or one of our subsidiaries, you'll enjoy meaningful career experiences that enrich people's lives.

Industry

Health care and social assistance

Company size

10,000+ Employees

Headquarters location

Bloomfield, CT, US

Social media