HiringCafe
Join our community

167 developer tools jobs at 100 companies in O'Fallon, MO

1mo
Save
Mark Applied
Hide
F-22 System Test Tools & Automation Software Engineer (Associate, Experienced, or Senior)
Berkeley, Missouri, United States
$99k-$217k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
2+ YOEAbility to obtain U.S. security clearance and SAP access; Bachelor’s degree; 2+ years software development/troubleshooting; experience with software/hardware integration and real-time simulation environments.
C, C++, Ada, Go, Java, Rust, Python, Linux, Windows, Assembly
Job PostingView all
1mo
Save
Mark Applied
Hide
F-22 System Test Tools & Automation Software Engineer (Associate, Experienced, or Senior)
Berkeley, Missouri, United States
$99k-$217k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
2+ YOEUS person able to obtain U.S. Secret clearance, Bachelor's degree, 2+ years software development experience, ability to obtain SAP access, experience with C/C++, Ada, Go/Java/Rust/Python, Linux/Windows, hardware-software integration, API and containerization concepts.
C, C++, Ada, Go, Java, Rust, Python, Linux, Windows, Assembly, API, containerization
Job PostingView all
2mo
Save
Mark Applied
Hide
Cyber Security Engineer - NSS Tools
St. Louis, Missouri, United States
$75k-$158k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
7+ YOEExperience in Linux system administration, shell scripting, secure networking, AWS, with TS/SCI clearance and 7+ years in related fields.
Linux, Shell scripting, AWS, EC2, S3, CloudFormation, Terraform, Ansible, GitHub, GitLab
Job PostingView all
2mo
Save
Mark Applied
Hide
Cyber Security Engineer - NSS Tools
St. Louis, Missouri, United States
$75k-$158k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
7+ YOEActive TS/SCI clearance, DOD 8570 IAT II and CSSP Infrastructure Support, 7+ years experience, Linux system administration, shell scripting, logging and networking, familiarity with AWS, Ansible, and GitHub/GitLab; Bachelor's degree required.
Linux, shell scripting, tcpdump, Traceroute, Ping, Netstat, nslookup, EC2, S3, CloudFormation, Terraform, Ansible, GitHub, GitLab, SEIM
Job PostingView all
2w
Save
Mark Applied
Hide
Mulesoft Developer
St. Louis, Missouri, United States
HybridFull Time
Equifax
EquifaxNew York Stock Exchange: EFX: Provides consumer credit reporting and data analytics services globally.
2+ YOEBachelor's or equivalent,2+ years software development experience with Java, Python, JavaScript, build tools (Maven/Gradle), frontend (HTML/CSS), and cloud (GCP/AWS/Azure).
Mulesoft, Java, Python, Javascript, Maven, Gradle, HTML, CSS, GCP, AWS, Azure, Angular, Bootstrap, JAVA/J2EE, SpringBoot, SVN, Git, Github, JDK, SQL Server, MySQL, JIRA, Confluence, JUnit, Selenium, LoadRunner, SoapUI, Data Fabric, CSA Toolset
Job PostingView all
1mo
Save
Mark Applied
Hide
Lead Software Engineer
O'Fallon, Missouri, United States
$140k-$231k/yr OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
Strong backend engineering with Java and Spring Boot, Oracle/SQL experience, MCP servers and AI-assisted development tool familiarity, distributed systems, testing, secure coding, microservices, observability, and mentoring experience.
Java, Spring Boot, Oracle, SQL, MCP servers, GitHub Copilot, Claude, Gemini, Sterling Connect: Direct, SFTP, MQ, Kubernetes, Docker
Job PostingView all
2w
Save
Mark Applied
Hide
Software Engineer I
Fenton, Missouri, United States
HybridFull Time
Maritz
Maritz: Provides business incentive, event, and loyalty management solutions.
1+ YOE1-2 years relevant experience or equivalent practical experience; knowledge of web frameworks, OOP, REST services, databases, basic cloud (AWS/GCP/OCI), secure coding, and AI-assisted development tools.
GitHub Copilot, Claude, AWS, GCP, OCI, REST
Job PostingView all
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
NISC
NISC: Provides enterprise software solutions for utility and broadband cooperatives.
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
Job PostingView all
3w
Save
Mark Applied
Hide
Senior Developer - Go Language (US Citizenship REQUIRED)
St. Louis or United States
$106k-$133k/yr RemoteFull Time
World Wide Technology
World Wide Technology: Global technology solutions provider and systems integrator.
5+ YOEUS citizenship required. 5+ years development experience, strong Go skills, IAM (OAuth, OpenID Connect, SAML), experience with Okta, REST/GraphQL APIs, PostgreSQL, RabbitMQ, OpenShift/Kubernetes, Git/GitHub, CI tools, and observability stacks.
Go, OAuth, OpenID Connect, SAML, Okta, REST, GraphQL, PostgreSQL, RabbitMQ, OpenShift, Kubernetes, Git, GitHub, Codefresh, GitHub Actions, Prometheus, OpenTelemetry, Grafana, Splunk, Vue
Job PostingView all
6d
Save
Mark Applied
Hide
Senior Software Engineer
St. Louis, Missouri, United States
OnsiteFull Time
London Stock Exchange Group
London Stock Exchange GroupLondon Stock Exchange: LSEG: Provides financial market infrastructure and global data analytics services.
5+ YOE5+ years software development experience with C++/C#/ .NET, strong C++ fundamentals, Linux/Bash/Cron experience, cloud (Microsoft Azure/AWS/GCP), Git, CI/CD practices, and familiarity with AI-assisted coding tools.
C++, C#, .NET, Linux, Bash, Cron, Microsoft Azure, AWS, Google Cloud Platform (GCP), Git, GitHub Copilot, Microsoft Copilot, ChatGPT, Azure DevOps, GitHub Actions, Jenkins, AWS Lambda, Azure Functions, Docker, Kubernetes, Prometheus, Grafana, Datadog, Splunk, Microsoft Azure Monitor
Job PostingView all
3mo
Save
Mark Applied
Hide
Software Developer
St. Louis, Missouri, United States
OnsiteFull Time
Bana Solutions
Bana Solutions: Provides software engineering, cybersecurity, and data solutions for government agencies.
4+ YOE5+ years in web applications; 2+ years cloud experience (AWS/Azure); modern web frameworks; HTML/JavaScript; Linux/Windows; OOP; performance; dev tools; agile; Bachelor's in CS or related field.
AWS, Azure, JavaScript, HTML, JQuery, Git, Gitlab, Jira, Linux, Windows, Node, Angular, React, Vue
Job PostingView all
1mo
Save
Mark Applied
Hide
Software Developer II - Financials (Full Stack, Front End)
Cedar Rapids or Lake Saint Louis or Mandan
HybridFull Time
NISC
NISC: Develops enterprise software for energy and telecommunications cooperatives.
5+ YOE5+ years software development experience; full-stack development with Angular/TypeScript or GWT and Java; experience with RDBMS (Postgres, Oracle), cloud stack (AWS, Kubernetes, Spring Boot, Kafka, Cassandra), Git, automated testing, and Agile tools (Jira, Confluence, Bitbucket, Bamboo).
Angular, TypeScript, GWT, Java, Postgres, Oracle, 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, Microservices
Job PostingView all
1mo
Save
Mark Applied
Hide
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
Job PostingView all
1mo
Save
Mark Applied
Hide
AI Engineer
St. Petersburg or Detroit or St. Louis or Richmond or Raleigh or Dallas or Indianapolis or Minneapolis
RemoteFull Time
Kobie
Kobie: Designs and manages customer loyalty programs for global brands.
3+ YOE3+ years professional Python, 1+ year LLMs in production, experience with LangChain/LangGraph or similar, observability tools (CloudWatch, LangSmith, Langfuse, MLflow, OpenTelemetry), Git and Docker, SQL and Snowflake experience preferred.
Python, LangChain, LangGraph, Pydantic, JSON Schema, Amazon AgentCore, AgentCore Runtime, AgentCore Evaluations, AgentCore Strands, CrewAI, Semantic Kernel, Amazon Bedrock, Snowflake, Snowpark, Snowflake Cortex, SQL, Amazon CloudWatch, LangSmith, Langfuse, MLflow, OpenTelemetry, Git, Docker, awscli
Job PostingView all
1mo
Save
Mark Applied
Hide
Sr. R&D Engineer
Hazelwood, Missouri, United States
$81k-$103k/yr HybridFull Time
Cardinal Health
Cardinal HealthNYSE: CAH: Distributes pharmaceuticals and manufactures medical products for healthcare providers.
2+ YOEDesign, develop, test, and refine electromechanical medical devices; firmware/embedded software development (C, C++), tool development with C# and Microsoft Visual Studio; develop test protocols to meet FDA/European standards. 2+ years preferred.
C#, Microsoft Visual Studio, C, C++
Job PostingView all
1mo
Save
Mark Applied
Hide
Training Developer / Instructor
Scott Air Force Base, Illinois, United States
$70k-$90k/yr HybridFull Time
INTECON
INTECON: Provide space training and technical support for defense missions.
5+ YOEActive Top Secret clearance (SCI preferred), U.S. citizenship, bachelor's degree (master's preferred), 5+ years developing/delivering DoD/AF training and technical documentation, instructional design (ADDIE/SAM), e-learning tools and MS Office/SharePoint/Teams proficiency.
Adobe Captivate, Articulate Storyline, Camtasia, Adobe Acrobat Pro, Microsoft Word, Microsoft PowerPoint, Microsoft Excel, Microsoft Outlook, Microsoft Teams, Microsoft SharePoint, Learning Management Systems (LMS), JIRA, Confluence, ZoomGov
Job PostingView all
1mo
Save
Mark Applied
Hide
Cloud Developer/Engineer
Chantilly or St. Louis
OnsiteFull Time
Freedom Technology Solutions Group
Freedom Technology Solutions Group: Provides geospatial and software engineering solutions for national security agencies.
5+ YOE5+ years cloud experience (Azure primary, AWS), Bachelor's degree or 4+ years IT experience in lieu, DoD 8570 IAT Level 2 (or obtain within 6 months), active clearance with polygraph, IaC and DevOps tool proficiency, scripting skills.
AWS, Azure, Oracle, GCP, Terraform, ARM templates, Ansible, BICEP, Microsoft Azure Monitor, Microsoft Azure Logging Analytics, Microsoft Defender for Cloud, Microsoft Sentinel, Microsoft Azure Policy, PowerShell, Python, Microsoft Azure CLI, Microsoft Logic Apps, Microsoft Azure Automation, Microsoft Azure DevOps, Jenkins, Gitlab, GitHub Enterprise, AWS CodeStar, Docker, Bash, YAML, JSON, Kubernetes, NSGs, JIRA, TOGAF, Zachman
Job PostingView all
1w
Save
Mark Applied
Hide
Tool and Die Engineer
Granite City, Illinois, United States
$90k-$110k/yr OnsiteFull Time
MultiSource Manufacturing
MultiSource Manufacturing: Provides precision machining and contract manufacturing services.
5+ YOEBachelor's degree or equivalent, 5+ years tooling/tool & die/manufacturing engineering experience, CAD and GD&T proficiency, experience with precision machining and regulated environments.
GD&T, SolidWorks, Inventor, Creo, CNC
Job PostingView all
1mo
Save
Mark Applied
Hide
Packaging Engineer - Technology Transfer
Bridgeton, Missouri, United States
OnsiteFull Time
Virbac
VirbacEuronext Paris: VIRP: Produces pharmaceutical and nutritional products for animal health.
3+ YOEBachelor's in science/engineering required; 3+ years packaging engineering or process development (min 3), with at least 2 years in a pharmaceutical/FDA-regulated environment; cGMP knowledge; experience with scale-up, risk assessment, and lean/Six Sigma tools; ability to travel ~10%.
Job PostingView all
2mo
Save
Mark Applied
Hide
Process Engineer
Saint Louis, Missouri, United States
$88k-$104k/yr OnsiteFull Time
Pretium Packaging
Pretium Packaging: Manufacturing rigid plastic packaging solutions for various global industries.
Bachelor’s or associate’s degree in mechanical/plastics engineering; experience with reheat blow, system startups, troubleshooting, tooling and Lean practices.
Aoki ISBM, Uniloy IBM, Zhongya IM, Lean Manufacturing, Oven profiling, Molds/Tooling, Conveyors
Job PostingView all

Explore Jobs

Expand Your Job Search