127 applications developer jobs at 70 companies in Frontenac, MO
5d
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Applications Engineer II- Solutions
St. Louis or Princeton or Hoffman Estates
OnsiteFull Time
3+ YOEBachelor's in engineering,3–7 years application/design engineering in automation or motion control,knowledge of motors/drives/gearing,CAD familiarity,strong analytical and communication skills.
CAD
1mo
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IBM i Developer — RPG / Business Applications
Sunset Hills, Missouri, United States
HybridFull Time
3+ YOE3+ years IBM i development experience with fully free-format RPG (RPGLE/SQLRPGLE), CL/CLLE, embedded SQL/DB2, ILE concepts, RDi or VS Code+Code4i, and familiarity with Jira; US work authorization required, no visa sponsorship.
ILE RPG, RPGLE, SQLRPGLE, CL, CLLE, Embedded SQL, DB2, RDi, VS Code, Code4i, Jira, Node.js, PHP, Python, PASE, X12, FTP, AS/400, iSeries, Power Systems
1w
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Application Developer - JavaScript
Charlotte or Louisville or Minneapolis or Olympia or Philadelphia or Redlands or San Antonio or St. Louis or Vienna
$84k-$141k/yr OnsiteFull Time
2+ YOE2+ years web application development with JavaScript/TypeScript, experience with modern web frameworks, CI/CD, foundational cartography knowledge, bachelor's degree, and ability to travel up to 25–50%.
JavaScript, TypeScript, ArcGIS Maps SDK for JavaScript, React, Angular, Svelte, Vue, WebGL, ArcGIS Experience Builder, CI/CD
4w
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Application Developer II
St. Louis, Missouri, United States
OnsiteFull Time
3+ YOE3+ years developing integrations and applications using iPaaS (Boomi/Mulesoft/Snaplogic), SQL, JSON/XML, modern stacks (.NET,C#/Node.js/TypeScript/Python/Ruby), DevSecOps practices and cloud platforms (AWS/Azure).
Boomi, Mulesoft, Snaplogic, SQL, JSON, XML, Palantir, .NET 6+, C#, Node.js, TypeScript, Python, Ruby, Ruby on Rails, Sinatra, ActiveRecord, CI/CD, DAST, SAST, SCA, Checkmarx, OWASP, GitHub, Snyk, Terrascan, Terraform, SFTP, PGP, AWS, Azure, Microsoft Office 365
4w
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Application Developer II
St. Louis, Missouri, United States
OnsiteFull Time
3+ YOE3+ years experience with enterprise iPaaS (Boomi/Mulesoft/Snaplogic), strong SQL and API integration skills, JSON/XML knowledge, application development on modern stacks (.NET6+/C#, Node.js/TypeScript, Python, Ruby), DevSecOps familiarity, cloud and container experience, Agile.
Boomi, Mulesoft, Snaplogic, Palantir, .NET 6+, C#, Node.js, TypeScript, Python, Ruby, Ruby on Rails, Sinatra, ActiveRecord, SQL, JSON, XML, CI/CD, DAST, SAST, SCA, Checkmarx, OWASP, GitHub, Snyk, Terrasan, Terraform, SFTP, PGP, AWS, Azure, Microsoft Office 365
1d
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Software DEVELOPER
O'Fallon, Missouri, United States
$60k-$135k/yr OnsiteFull Time
5+ YOERequires 5–8 years of experience developing enterprise Java applications with Spring Boot, REST APIs, Angular, Node.js, microservices, cloud platforms, DevOps, and secure coding practices.
Java, Spring Boot, REST APIs, Angular, HTML, CSS, JavaScript, jQuery, Node.js, AWS, Azure, PCF, Kubernetes, DevOps, Splunk, CI/CD
1mo
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Sr. Application Developer - Legacy System Modernization
Bridgeton, Missouri, United States
OnsiteFull Time
5+ YOE5+ years application development experience, expert C#/.NET and COBOL legacy experience, Microsoft SQL Server, Azure DevOps/GitHub, CI/CD, AI-assisted development, and ability to modernize legacy systems.
C#, .NET, COBOL, SQL, Microsoft SQL Server, GitHub, GitHub Actions, Azure DevOps, HP NonStop, CI/CD
2mo
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Agentic AI Developer
O'Fallon, Illinois, United States
$99k-$225k/yr HybridFull Time
3+ YOE3+ years software development experience, Python, software design patterns, LLM application development, embeddings/vector DBs/semantic search, agent planning and AI safety knowledge, ability to obtain Secret clearance, Bachelor's degree.
Python, large language models, vector databases, Retrieval-Augmented Generation (RAG)
5d
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Senior Software Engineer Java
Hopkins or Irving or Earth City
$120k-$141k/yr HybridFull Time
5+ YOE5+ years Java development experience with Spring Boot, microservices, messaging, CI/CD, and enterprise application design; bachelor’s degree in CS or related field required.
Java, Spring Boot, Spring Cloud, Spring Security, Spring Data JPA, Kafka, JMS, Tibco EMS, ActiveMQ, SQL Server, Oracle, MySQL, Docker, Kubernetes, GitLab, Maven, JUnit, Mockito, SonarQube, Kibana, Splunk, DataDog, GitHub Copilot, AWS, Azure, JWT, OAuth2
2d
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Information Technology Specialist (Applications Software)
Scott Air Force Base, Illinois, United States
$109k-$142k/yr OnsiteFull Time
1+ YOEOne year of specialized experience equivalent to GS-12 in IT project management, software development, enterprise architecture, cybersecurity, contractor evaluation, and technical team leadership.
Agile, USAJOBS, USA Staffing, USA Hire, Electronic Questionnaire
2w
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Junior Application Developer
Denver or Springfield or Sterling or St. Louis
$53k-$106k/yr OnsiteFull Time
0+ YOEBachelor's or equivalent, 0–3 years development experience, experience with Java and/or Python, familiarity with web apps and relational databases, TS/SCI clearance with polygraph required.
Java, Python, ArcGIS, GeoServer, OpenLayers, Cesium, Git, CI/CD, containerization
1w
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Junior Software Developer
St. Louis, Missouri, United States
$50k-$60k/yr OnsiteFull Time
Bachelor's in CS or related, proficiency in JavaScript, React.js, HTML, CSS, RESTful APIs, PostgreSQL, Git and Figma; experience building web/ERP applications; strong communication and problem-solving.
JavaScript, React.js, HTML, CSS, RESTful APIs, PostgreSQL, FastAPI, Git, Figma, CI/CD
4d
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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
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AWS Full Stack Engineer
Springfield or Reston or Arnold
$99k-$225k/yr OnsiteFull Time
5+ YOE5+ years full-stack and enterprise application development; 2+ years AWS and IaC experience; proficiency with React/Vue, backend languages (Java, Python, Go, C++), JavaScript/TypeScript, containerization, and cloud-native patterns; TS/SCI clearance required.
React, Vue, Java, Python, Go, SQL, C++, JavaScript, TypeScript, HTML, CSS, AWS, ECS, Lambda, SQS, SNS, EC2, RDS, DynamoDB, IAM, AWS CDK, Terraform, CloudFormation, Docker, Kubernetes, MongoDB, API Gateway
3w
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Software Engineer–Developer, Phantom Works Weapons (Associate or Experienced)
Saint Charles or Saint Louis
$99k-$171k/yr OnsiteFull Time
1+ YOEAbility to obtain U.S. Secret clearance and U.S. Person status; Bachelor's degree or equivalent; 1+ years experience with C++, Python, C#, Linux, git; experience with software architecture and networked TCP/UDP applications.
C++, Python, C#, Linux, git
1mo
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Associate Real Time Software Engineer, Phantom Works
Hazelwood or Cambridge or Mesa
$99k-$144k/yr HybridFull Time
3+ YOEBachelor's degree, ability to obtain U.S. Secret clearance,3+ years C/C++ and SDLC experience,1+ years real-time and safety/flight-critical development,EMR not applicable,ability to pass drug test.
C, C++, Python, Git, VX Works, DO-178C, MIL-HDBK-516C, MIL-STD-882E, CodeVue
4d
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QA Automation Engineer – Healthcare
Earth City, Missouri, United States
$45k-$77k/yr RemoteFull Time
Strong experience testing Pega applications, manual and automated functional/integration testing, database and data migration validation, API/cloud/Kafka testing, and using Tosca, Jira, and qTest.
Pega Infinity, Teradata, Snowflake, Oracle, PostgreSQL, Tosca (Tricentis), Postman, Ready API, Confluent Kafka, Test containers, AWS, Jira, qTest
1w
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Software Developer / Application & Web Support Lead
Scott Air Force Base, Illinois, United States
OnsiteFull Time
5+ YOE5+ years SharePoint Online/web application development and sustainment; DCWF Work Role 212 proficiency; DoDM 8140.03 foundational qualification; final SECRET clearance; hands-on Power Platform, SharePoint Online, Nintex, Java/Oracle, ColdFusion, .NET/SQL; 508-compliant application delivery.
SharePoint Online, Microsoft Power Platform, Nintex, Java, Oracle, ColdFusion, .NET, SQL, Power BI
2w
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Junior Application Developer
Denver or St. Louis or Sterling or Springfield
$53k-$106k/yr OnsiteFull Time
0+ YOEBachelor's (or equivalent),0–3 years software development experience,Java and/or Python,web development and relational DB familiarity,TS/SCI clearance with polygraph,teamwork and problem-solving skills.
Java, Python, ArcGIS, GeoServer, OpenLayers, Cesium, Git, CI/CD
2mo
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Machine Vision Engineer
Bridgeton, Missouri, United States
OnsiteFull Time
3+ YOEBachelor's in Electrical or Computer Engineering, 3+ years developing electronics and software for machine vision, experience with image processing, 3D geometry, board-level design, embedded C/C++, and application/UI development.
C, C++, Microsoft Visual Studio
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