25 front end engineer jobs at 13 companies in O'Fallon, MO
2mo
Save
Mark Applied
Hide
Front End Developer
Springfield or Vienna or St. Louis
OnsiteFull Time
2+ YOE2+ years of front-end web development; HTML5, CSS3, TypeScript, JavaScript; React/Angular/Vue; GIS knowledge a plus; bachelor's in CS/math/GIS/STEM.
HTML5, CSS3, TypeScript, JavaScript, React, Angular, Vue, GIS, Docker, Kubernetes, Azure, AWS, GCP, CI/CD
3mo
Save
Mark Applied
Hide
Software Engineer - Frontend
Florissant, Missouri, United States
OnsiteFull Time
Extensive experience building frontend architecture and design systems; React/Next.js web, React Native/Expo mobile; UI/UX optimization; scalable deployments; AI/SEO integration.
React, Next.js, React Native, Expo, Tailwind CSS, LaunchDarkly, New Relic, Mixpanel, Mux, Cloudflare Pages, Vercel, AWS Amplify, ECS, Fargate, EC2, S3, CloudFront, AI/SEO tooling
1mo
Save
Mark Applied
Hide
Geospatial Front End Developer – Multiple Positions at Junior/Mid/Senior Levels
Springfield or Vienna or St. Louis
OnsiteFull Time
2+ YOEActive TS/SCI clearance, bachelor\u0002s degree in CS/math/GIS/STEM, 2+ years front-end experience with HTML5,CSS3,TypeScript,JavaScript and front-end libraries; strong communication and problem-solving skills.
HTML5, CSS3, TypeScript, JavaScript, React, Angular, Vue, Docker, Kubernetes, Azure, AWS, GCP
3d
Save
Mark Applied
Hide
Software Developer II - Utility Billing Software (Front End, Angular)
Cedar Rapids or Lake Saint Louis or Mandan
HybridFull Time
5+ YOE5+ years software development experience; strong front-end (Angular/TypeScript), Java and RDBMS experience; automated testing, cloud, container, and Git tooling familiarity; bachelor's in CS preferred.
Angular, TypeScript, Java, Postgres, Oracle, AWS, Kubernetes, Spring Boot, Kafka, Cassandra, Git, JIRA, Confluence, Bitbucket, Bamboo, Agentic AI, generative AI, SQL
1mo
Save
Mark Applied
Hide
Software Development Engineer II – Front-End (Mission-Focused | ArcGIS)
Redlands or St. Louis or Vienna
$97k-$162k/yr OnsiteFull Time
2+ YOE2+ years professional software development; front-end web development with libraries like React/Angular/Vue; experience building high-availability, scalable solutions; US citizenship with active Top Secret/SCI clearance; Bachelor's in CS/Math/GIS/STEM.
React, Angular, Vue, Docker, Kubernetes, Azure, AWS, GCP, CI/CD
1mo
Save
Mark Applied
Hide
Software Developer II - Provisioning (Full Stack, Front End)
United States or Cedar Rapids or Lake Saint Louis or Mandan
HybridFull Time
5+ YOE5+ years software development experience; proficiency with Angular, TypeScript, Java, Postgres/Oracle, MongoDB, AWS, Kubernetes, Spring Boot, Kafka; experience with Git, JIRA, Confluence, CI tools and agentic AI coding tools; Bachelor’s preferred.
Angular, TypeScript, GWT, Java, Postgres, Oracle, MongoDB, AWS, Kubernetes, Spring Boot, Kafka, SSO, Cassandra, Git, JIRA, Confluence, Bitbucket, Bamboo, Claude Code, Augment, Jetbrains Junie, GitHub Copilot, Cursor, OpenAI Codex, Spark, Databricks, .NET, SQL
2mo
Save
Mark Applied
Hide
Senior Software Engineer
O'Fallon, Missouri, United States
$115k-$184k/yr OnsiteFull Time
Bachelor's degree in computer science/engineering or equivalent, strong Java stack, AWS cloud, SQL/NoSQL, front-end (React/Angular), PCI/GLBA/compliance knowledge, strong communication and problem-solving.
Java, Java EE, JSP, Servlets, Spring, Hibernate, Oracle, SQL Server, MySQL, PostgreSQL, MongoDB, SQL, NoSQL, REST, SOAP, WebSphere, JBOSS, Tomcat, HTML, JavaScript, JQuery, UNIX, XML, XSLT, CSS, CSharp, React, Angular, Maven, Gradle, Jenkins, Chef, Sonar, MongoDB, AWS, EC2, ECS, S3, RAD/Eclipse
1w
Save
Mark Applied
Hide
Senior Developer
Calgary or Orlando or Edmonton or Scottsdale or Pittsburgh or Toronto or Raleigh or Columbus or Charleston or Vancouver or Winnipeg or Ottawa or Phoenix or Halifax or St. Louis or Moncton
$160k-$200k/yr RemoteFull Time
4+ YOE4+ years Ruby on Rails experience, front-end fundamentals (JavaScript, React), strong SQL and data skills, background with scale/concurrency, testing practice, and Agile experience.
Ruby on Rails, JavaScript, React, React Native, SQL, Git, GitHub, Jira
18h
Save
Mark Applied
Hide
Web Developer (Client Portal)
Montreal or St. Louis or Belfast
HybridFull Time
Production web application experience; JavaScript or TypeScript and modern front-end frameworks; REST APIs; Python or Node.js; HTML, CSS/SASS, responsive design; databases, Git, testing, and deployment pipelines.
JavaScript, TypeScript, React, Python, Node.js, FastAPI, Flask, HTML5, CSS3, SASS, DOM, Git, OAuth, JWT, CORS, Vite
3d
Save
Mark Applied
Hide
Senior Full Stack Engineer
St. Louis or Alpharetta
HybridFull Time
5+ YOEBachelor's or equivalent,5-7 years software development experience building full-stack cloud-native applications; front-end and back-end expertise; cloud, containerization, IaC, CI/CD, SQL/NoSQL experience; Generative AI and AI-assisted development experience preferred; must have work authorization (no sponsorship).
GitHub Copilot, Gemini, Claude, ChatGPT, Llama, Java, Python, Node.js, React, Angular, Vue.js, HTML5, CSS3, TypeScript, Google Cloud Platform, GCP, AWS, Azure, Docker, Kubernetes, Terraform, CloudFormation, GitHub Actions, Jenkins, GitLab CI, Spanner DB, Alloy DB, PostgreSQL, MySQL, MongoDB, DynamoDB, Firestore, JIRA, Confluence, GitHub, Maven, Gradle, JUnit, Mockito, Playwright, Jasmine, Celenium
1mo
Save
Mark Applied
Hide
SDC Java Software Developer---Senior---St. Louis (St. Louis, MO, US, 63105)
St. Louis, Missouri, United States
$67k-$137k/yr HybridFull Time
3+ YOEBachelor's in CS or related, minimum 3 years software development experience; back-end Java/Python/Node.js, REST, NoSQL, microservices, cloud (AWS/Azure); front-end React/Angular; API design, Git and CI/CD, TDD/BDD, agile.
Java, Python, Node.js, REST, NoSQL, Microservices, Serverless, AWS, Azure, React, Angular, Git, CI/CD, Akka, Scala, Kafka, RabbitMQ, ElasticSearch, AngularJS, ReactJS, Hadoop, Spark, Flume, Mongo, Cassandra, IaaS, PaaS, API Management, TDD, BDD
2w
Save
Mark Applied
Hide
Full Stack Software Developer (.NET/React)
St. Louis, Missouri, United States
HybridFull Time
3+ YOE3+ years .NET experience, Next.js/React front-end, Optimizely CMS and headless CMS integration, GraphQL/REST APIs, Azure CI/CD and DevOps, Git, CSS/SCSS, JavaScript/TypeScript, strong problem-solving and collaboration skills.
Optimizely CMS, Next.js, React, GraphQL, REST, SSR, SSG, ISR, Jira, Azure DevOps Boards, Azure CI/CD pipelines, Git, CSS, Sass, SCSS, JavaScript, TypeScript, Optimizely Graph, Aprimo DAM, Cloudflare CDN, Google Analytics
1mo
Save
Mark Applied
Hide
Director, Product Strategy
Clayton, Missouri, United States
$203k/yr OnsiteFull Time
10+ YOE5+ MgmtBachelor's degree (Master's preferred) in business/marketing/engineering, 10+ years in product development/management/engineering/operations, 5+ years leadership, proficient in Microsoft Word/Excel/PowerPoint and SAP BI/Front End, valid U.S. driver's license, U.S. citizenship for DoD facility access.
Microsoft Word, Microsoft Excel, Microsoft PowerPoint, SAP Business Intelligence (BI), SAP Front End
1mo
Save
Mark Applied
Hide
Director, Project Development – Manufacturing Design-Build
Alpharetta or Atlanta or Philadelphia or Fort Worth or Boston or St. Louis or Raleigh or Chicago or United States
OnsiteFull Time
15+ YOE15+ years planning, design, and delivery of manufacturing facilities via design-build/EPC; bachelor's in engineering/architecture/construction management; professional licensure preferred; ability to lead front-end planning, FEED, budgeting, and cGMP facility design; travel willingness.
Explore Jobs
Expand Your Job Search
Top Cities Near O'Fallon for Front End Engineer
- Front End Engineer jobs in St. Louis, MO
- Front End Engineer jobs in Saint Charles, MO
- Front End Engineer jobs in Saint Peters, MO
- Front End Engineer jobs in Florissant, MO
- Front End Engineer jobs in Chesterfield, MO
- Front End Engineer jobs in Belleville, IL
- Front End Engineer jobs in Wildwood, MO
- Front End Engineer jobs in Wentzville, MO
- Front End Engineer jobs in University City, MO
- Front End Engineer jobs in Ballwin, MO
- Front End Engineer jobs in Granite City, IL
- Front End Engineer jobs in O'Fallon, IL
- Front End Engineer jobs in Kirkwood, MO
- Front End Engineer jobs in Maryland Heights, MO
- Front End Engineer jobs in East Saint Louis, IL
- Front End Engineer jobs in Alton, IL
- Front End Engineer jobs in Hazelwood, MO
- Front End Engineer jobs in Edwardsville, IL
- Front End Engineer jobs in Collinsville, IL
- Front End Engineer jobs in Webster Groves, MO