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69 react engineer jobs at 38 companies in Florissant, MO

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Mobile Engineer - React Native
St. Louis, Missouri, United States
$90k-$176k/yr HybridFull Time
CGI
CGINYSE: GIB: Provides information technology and business consulting services.
10+ YOE10+ years software engineering experience, 5+ years React Native/JS/TypeScript, mobile architecture, offline-first, native Android/iOS skills, CI/CD and security, bachelor's degree preferred.
React Native, React, JavaScript, TypeScript, GraphQL, Firebase, GitHub Actions, Azure DevOps, Fastlane, Jenkins, Kotlin, Java, Swift, Objective C, AWS, Azure, Google Cloud
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2mo
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Technical Lead Software Engineer (Java, React, Spring boot)
Minnetonka or Madison or St Louis or Omaha
$100k-$150k/yr OnsiteFull Time
Medica
Medica: Provides health insurance coverage and health plan administration services.
5+ YOE5+ years product-related work experience; proficient with Java and React.
Java, React, Spring Boot, Oracle, SQL Server, Azure DevOps, GitHub, Jenkins, CI/CD
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1w
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Full Stack Software Developer (.NET/React)
St. Louis, Missouri, United States
HybridFull Time
Copeland
Copeland: Provides compression and control solutions for climate technologies.
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
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2mo
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Software Engineer
Chesterfield, Missouri, United States
HybridFull Time
MiTek
MiTekNYSE: BRK-B: Provides software and automation for the building industry.
4+ YOEDesign, build, and evolve software solutions; .NET/C#, SQL Server; React/Angular; Agile; AI tooling.
.NET, C#, React, Angular, SQL Server, Microsoft Azure, Entity Framework, Typescript, RabbitMQ, MassTransit, SonarQube, GitHub Copilot
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2d
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Senior Mission Software Engineer, Public Sector
Austin or Honolulu or St. Louis or Washington
$186k-$279k/yr HybridFull Time
Scale AI
Scale AI: Provides data and infrastructure for training artificial intelligence models.
5+ YOE5+ years software engineering experience; strong Python and TypeScript; cloud (AWS/Azure/GCP), containers, Linux; active TS/SCI clearance; ability to operate in customer-facing, forward-deployed government environments.
Python, TypeScript, AWS, Azure, GCP, Node, React, Kubernetes, Docker, Terraform, Linux
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2mo
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Software Engineer - Frontend
Florissant, Missouri, United States
OnsiteFull Time
Augustine Institute
Augustine Institute: Provides Catholic theological education and media for faith formation.
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
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2mo
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Senior Software Engineer
O'Fallon, Missouri, United States
$115k-$184k/yr OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
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
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1mo
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Sr. Engineer, Software - Archimedes
St. Louis or Brentwood or Alaska or Arizona or Arkansas or California or Connecticut or Delaware or Hawaii or Idaho or Louisiana or Maine or Massachusetts or Michigan or Mississippi or Montana or Nebraska or Nevada or New Mexico or New York or North Carolina or North Dakota or Oregon or Rhode Island or South Carolina or South Dakota or Texas or Utah or Vermont or Washington or West Virginia or Wyoming or United States
HybridFull Time
Navitus Health Solutions
Navitus Health Solutions: Transparent pharmacy benefit management and specialty pharmacy provider.
8+ YOEBachelor's in CS or related; 8+ years software engineering experience (5+ years with C#, .NET, React); experience with cloud-native, APIs, microservices, CI/CD, Git, Azure; technical leadership and mentoring experience.
C#, .NET, ASP.NET Core, React, TypeScript, JavaScript, REST APIs, GraphQL, Webhooks, API Management, Microsoft Azure App Services, Microsoft Azure Functions, Microsoft Azure Container Apps, Microsoft Azure Kubernetes Service (AKS), Microsoft Azure Storage, Microsoft Azure Databricks, Microsoft Azure Data Lake Storage Gen2, Microsoft Azure Synapse Analytics, Microsoft SQL Server, PostgreSQL, Microsoft Azure DevOps, GitHub Actions, CI/CD, Infrastructure as Code, Retrieval-Augmented Generation (RAG), Microsoft Azure OpenAI, Microsoft Azure AI Services, Intelligent Automation, Agent-Based Solutions, OWASP, OAuth2, OpenID Connect, DevSecOps, Git, Azure Repos, GitHub, TFS, Jira, Unix/Linux shell scripting
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3w
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BI & Data Engineer
St. Louis, Missouri, United States
$110k-$130k/yr HybridFull Time
Focus Financial Partners
Focus Financial Partners: Global partnership of independent fiduciary wealth management firms.
4+ YOEAdvanced Power BI and Snowflake skills, report and platform administration, Streamlit/React/FastAPI app development, Python and SQL, Git/GitHub and CI/CD, 4+ years BI/data engineering experience, bachelor's or equivalent.
Snowflake, Microsoft Power BI, Streamlit, React, FastAPI, GitHub Copilot, Git, GitHub, GitHub Actions, Snowpark Container Services, Docker, Cortex Analyst, SQL, Python, JavaScript, TypeScript, DAX, DirectQuery
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2w
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Developer
St Louis, Missouri, United States
OnsiteFull Time
Build-A-Bear
Build-A-BearNYSE: BBW: Sells customizable stuffed animals and provides interactive retail experiences.
5+ YOE5+ years software development experience, proficiency in full-stack OOP (C#, Java), relational databases, HTML/CSS/JavaScript and React, Git, RESTful API development, and Agile methodologies.
C#, Java, SQL, PostgreSQL, HTML, CSS, JavaScript, React, RESTful API, Git, Scrum, Kanban, Azure, AWS, CI/CD, DevOps
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1w
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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
ZayZoon
ZayZoon: Provides employees with instant access to their earned wages.
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
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3w
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Software Engineer
Maryland Heights, Missouri, United States
$105k-$128k/yr HybridFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
5+ YOEBachelor's degree or equivalent, ability to obtain U.S. Secret Clearance, 5+ years software development experience with JavaScript/TypeScript/React and C# or C++, REST API experience, Agile/Jira experience.
JavaScript, TypeScript, React, C#, C++, REST, Jira, Jira Align, Azure Devops, Git, .NET MAUI, SAFe Agile
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1mo
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Full Stack Developer
Clayton, Missouri, United States
OnsiteFull Time
Moneta
Moneta: Provides independent wealth management and financial advisory services.
3+ YOEBachelor's degree in CS/IT, 3+ years full‑stack development experience with TypeScript, React, React Native, Node.js, RESTful APIs, PostgreSQL; Salesforce experience advantageous; authorized to work in the US.
TypeScript, React, React Native, Node.js, RESTful APIs, Express.js, PostgreSQL, Sequelize ORM, Azure Kubernetes Service (AKS), Docker, CI/CD, Microsoft Fabric, Salesforce, Apex, Visualforce, Lightning Components, SOQL, Salesforce APIs, Microsoft Office, AI/ML
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3w
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Software Engineer
Maryland Heights, Missouri, United States
$105k-$128k/yr HybridFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
5+ YOEBachelor's degree or equivalent; 5+ years software development with JavaScript/TypeScript/React/C#/C++; experience with REST APIs, Agile/SAFe, Jira/Azure Devops, Git; ability to obtain U.S. Secret Clearance.
JavaScript, TypeScript, React, C#, C++, REST, SAFe, Jira, Jira Align, Azure Devops, Git, .NET MAUI
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1mo
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System Engineer- Cyber Security Engineering Focus
Redlands or St. Louis or Vienna
$121k-$198k/yr OnsiteFull Time
Esri
Esri: Developing software for digital mapping and spatial data analysis.
8+ YOE8+ years in RMF/A&A, vulnerability scanning, system hardening for Linux/Windows, experience with RMF tools (XACTA/eMASS), DoD 8570 certification, active Top Secret/SCI clearance, and a relevant bachelor's degree.
RMF, XACTA, eMASS, ACAS, IAVM, STIGs, Red Hat, CentOS, Windows, Python, Java, React, Jira, Confluence, NIST SP 800-53, CNSSI 1253, NIST SP 800-171
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2w
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Lead Software Engineer
O'Fallon, Missouri, United States
HybridContract
Delan Associates
Delan Associates: Provides engineering and professional services to government agencies.
Bachelor's in CS/IS, strong full-stack Java, API, Angular, React skills; experience with Agentic frameworks, MCP and LLM integrations; Qlik Sense and data architecture experience; strong analytical and communication skills.
Java, APIs, Angular, React, Agentic Frameworks, MCP, LLMs, Qlik Sense, Tableau, Power BI, WebFocus, Hadoop, Kafka
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2mo
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Front End Developer
Springfield or Vienna or St. Louis
OnsiteFull Time
INCATech
INCATech: Award-winning small business delivering geospatial information systems and cloud/Platform services.
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
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3w
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Web Software Developer
Scott Air Force Base, Illinois, United States
$120k-$160k/yr OnsiteFull Time
SAIC
SAICNYSE: SAIC: Provides engineering, IT, and mission support services to government.
10+ YOE10+ years experience, DoD Top Secret with SCI eligibility, CompTIA Security+, experience with Node.js, React, Strapi, AWS, AppStream, Confluence, JavaScript, HTML, CMS, and technical writing.
Node.js, React, AppStream, Confluence, JavaScript, HTML, Strapi, AWS, ServiceNow, Jira, Microsoft Word, Microsoft PowerPoint, Microsoft Visio, Microsoft Project, Microsoft Excel
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2w
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Software/Web Developer
Saint Louis, Missouri, United States
OnsiteFull Time
Kentro
Kentro: Provider of digital and IT services for federal agencies.
3+ YOEBachelor's degree or equivalent experience, 3+ years software/web development, experience with JavaScript/TypeScript/Python/Java/C#/PHP and React/Angular/Vue, RESTful APIs and databases, strong problem-solving and communication.
JavaScript, TypeScript, Python, Java, C#, PHP, React, Angular, Vue, RESTful APIs, SQL, NoSQL, AWS, Azure, Google Cloud, CI/CD, Docker, Kubernetes
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1mo
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Data Engineer Software Developer
Scott AFB, Illinois, United States
$99k-$106k/yr OnsiteFull Time
I2X Technologies
I2X Technologies: Provides mission-critical engineering, cybersecurity, and IT services to government agencies.
4+ YOEUS citizen with active Secret clearance, Bachelor's in CS/Engineering, 4+ years experience building data pipelines, proficiency with Kafka/Elastic/AWS/OpenShift, Python/Java/SQL, Linux, CI/CD, and ability to work onsite at Scott AFB.
Confluent Kafka, Elastic Stack, AWS, Red Hat OpenShift, Kubernetes, Kafka, Elastic, Logstash, Kibana, React, JavaScript, HTML, AWS Redshift, S3, Hadoop, Snowflake, Python, Java, SQL, shell scripting, Elasticsearch, Spark, NiFi, Databricks, ELK Stack, Azure, GCP, AWS GovCloud, Ansible, Puppet, Chef, Prometheus, Grafana, Git, Bitbucket, Atlassian JIRA, Confluence, CI/CD
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