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80 security software engineer jobs at 31 companies in Saint Peters, MO

1mo
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Senior Software Engineer
O'Fallon, Missouri, United States
$115k-$184k/yr OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment network facilitating electronic transactions and financial services.
3+ YOEBachelor's degree or equivalent, 3+ years software engineering experience (financial services preferred); strong software engineering knowledge, secure solution delivery, SDLC experience, and strong communication and mentoring skills.
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5d
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Software Engineer
Hazelwood, Missouri, United States
OnsiteFull Time
FlightSafety International
FlightSafety International: Professional aviation training and flight simulator manufacturing services.
2+ YOEBachelor's in CS/CE/Applied Math,2+ years software engineering experience,proficiency in C#,system-level debugging,strong math/geometry skills,ability to obtain U.S. person/export eligibility and possibly security clearance.
C#, Microsoft Visual Studio, MATLAB, PowerShell
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1mo
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Experienced Software Engineer
Hazelwood, Missouri, United States
$127k-$171k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
5+ YOEBachelor's degree, 5+ years software engineering experience, proficiency in C/C++/C#, Agile experience, ability to obtain U.S. Secret security clearance, simulation/software architecture experience preferred.
C, C++, C#, Python, Lua, OpenGL, Jira, Jenkins, GitLab, CMake, Visual Studio
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1mo
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Software Engineer
Denver or St. Louis or Sterling or Springfield
$82k-$172k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
5+ YOEBachelor's in a technical field, TS/SCI with polygraph, 5+ years software development experience with Java and/or Python, web frameworks, relational/NoSQL databases, Agile experience, and secure coding practices.
Java, Python, ArcGIS, GeoServer, OpenLayers, Leaflet, Cesium, Docker, Kubernetes, CI/CD
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1mo
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Software Engineer
Denver or Springfield or Sterling or St. Louis
$82k-$172k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
5+ YOEBachelor's in CS or related, 5+ years software development experience, Java and/or Python proficiency, experience with web frameworks and databases, TS/SCI clearance with polygraph required, Agile and secure coding experience.
Java, Python, ArcGIS, GeoServer, OpenLayers, Leaflet, Cesium, Docker, Kubernetes, CI/CD
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3mo
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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.
BS in Computer Science or related technical field; strong Java/Spring, Kafka, C++, JNI experience; software engineering best practices; leadership and problem solving; secure software development; willingness to mentor.
Java, Spring Boot, Kafka, C++, JNI
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1mo
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Software Developer Engineer (Experienced or Senior)
Hazelwood or Berkeley or Saint Louis
$127k-$217k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
5+ YOEBachelor's degree, 5+ years full‑stack software development, U.S. person able to obtain U.S. Secret security clearance, experience with mission/safety‑critical systems, agile and leadership experience.
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4d
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Security Engineer- Application Security & Cloud
Chesterfield or Mt Sterling
$87k-$131k/yr OnsiteFull Time
Dot Foods
Dot Foods: Redistributes food products from manufacturers to distributors nationwide.
2+ YOE2+ years experience in software/cloud/DevOps or security; bachelor's or equivalent; experience with .NET/Python/Azure; knowledge of secure development, API security, auth, and secrets management.
.NET, Python, Azure, Azure DevOps, GitHub Actions, Docker, Kubernetes, Terraform, Bicep, OWASP Top 10, NIST AI Risk Management Framework
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3w
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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
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Software Development Engineer I
St. Louis, Missouri, United States
$76k-$129k/yr OnsiteFull Time
Esri
Esri: Developing software for digital mapping and spatial data analysis.
1+ YOE1+ years JavaScript/TypeScript experience, bachelor's in CS/Math/GIS/STEM, strong OOP and software methodology knowledge, ability to maintain US security clearance, Python experience for geoprocessing preferred.
JavaScript, TypeScript, Python, HTML, CSS, Swift, Kotlin, ReactJS, Vue, Svelte, GIS, REST Web services, SQL, SQL Server, PostgreSQL, Oracle
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4w
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Software Developer - Advanced (MO, Saint Louis)
St. Louis, Missouri, United States
OnsiteFull Time
RiVidium
RiVidium: Provides cybersecurity software and IT services to federal agencies.
Requires RMF knowledge, experience with Python, HTML, CSS, JavaScript, React, Tableau, database development, and secure full‑stack software development; baccalaureate degree required.
Python, HTML, CSS, JavaScript, React, Tableau
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Senior Software Engineer - ServiceNow/Javascript/API
St. Louis or Brentwood or Richmond Heights or Clayton or Maplewood
HybridFull Time
Enterprise Mobility
Enterprise Mobility: Provider of vehicle rental and diverse mobility solutions.
3+ YOE3+ years software development, 2+ years ServiceNow and JavaScript experience, API scripting (REST/SOAP), shell scripting (SSH/PowerShell), US work authorization, reside in St. Louis area, security-minded.
ServiceNow, JavaScript, REST, SOAP, SSH, PowerShell, Agile, Scrum
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Senior Software Engineer - ServiceNow/Javascript/API
St. Louis, Missouri, United States
HybridFull Time
Enterprise Mobility
Enterprise Mobility: Provides global vehicle rental, leasing, and fleet management services.
3+ YOE3+ years software development with 2+ years ServiceNow and JavaScript, API scripting (REST, SOAP), shell scripting experience, authorized to work in the U.S., St. Louis residence required, security-minded and able to participate in on-call rotation.
ServiceNow, JavaScript, REST, SOAP, SSH, PowerShell, Web Services
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3w
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Software Engineer - Full Stack
St. Louis, Missouri, United States
$110k-$115k/yr OnsiteFull Time
LaunchCode
LaunchCode: Nonprofit providing free tech education and job placement services.
5+ YOE5+ years experience building and maintaining production systems; strong Postgres SQL skills; backend language proficiency (Golang preferred; Java/C#/C++/Python valued); front-end experience with Angular, HTML/CSS/JavaScript/TypeScript; cloud and security familiarity.
Angular, Golang, Java, C#, C++, Python, Postgres, Google Cloud, AWS, Azure, Git, Bitbucket, Node, HTML, CSS, JavaScript, TypeScript
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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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1mo
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Software Engineer - AI (Top Secret Clearance Required)
Alexandria or Chantilly or Gaithersburg or Saint Louis
OnsiteFull Time
North Point Technology
North Point Technology: Technology services and engineering for federal government missions.
Active Top Secret clearance (TS) required, bachelor’s in CS/Engineering, DoD 8570 IAT Level II/III (e.g., Security+), proficiency in Python, cloud (AWS) architecture, CI/CD, CloudFormation/Terraform, and database development.
Python, GitLab, Jenkins, AWS CloudFormation, Terraform, PostgreSQL, Zabbix, ACAS, Jira, Confluence, RocketChat, AWS, Windows, Linux
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2mo
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Junior Software Developer, Applications
O Fallon, Illinois, United States
OnsiteFull Time
ECS
ECSNYSE: ASGN: Provides advanced technology and engineering services to government agencies.
3+ YOE0-3 years of development experience; CompTIA Security+ or ability to obtain in 6 months; Bachelor's degree or equivalent experience; Java, HTML5, Spring, RHEL, SQL, JavaScript, XML, Agile; WebLogic, Docker, Kubernetes; Git, Jenkins, Gradle/Maven/Ant; Python; ServiceNow familiarity; IaC/CaC; test-driven development.
Java, HTML5, Spring, RHEL, SQL, JavaScript, XML, WebLogic, Gradle, Maven, Ant, Python, ServiceNow, Git, Jenkins, Docker, Kubernetes, Ansible, Puppet, Chef, Terraform, Bash, Perl, PowerShell, IaC, CaC
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3w
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Web Software Developer
Scott AFB, Illinois, United States
OnsiteFull Time
SAIC
SAICNASDAQ: SAIC: Provides government and defense clients with technology and engineering services.
10+ YOE10+ years experience, DoD Top Secret clearance with SCI eligibility, CompTIA Security+, Node.js/React/JavaScript/HTML, Strapi CMS, AWS, AppStream, Confluence, MS Office proficiency, technical writing, and configuration/change management for government customers.
Node.js, React, AppStream, Confluence, JavaScript, HTML, Strapi, AWS, Microsoft Word, Microsoft PowerPoint, Microsoft Visio, Microsoft Project, Microsoft Excel, ServiceNow, Jira
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2mo
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AI-Application Security Engineer
Saint Louis, Missouri, United States
OnsiteFull Time
Stifel
StifelNYSE: SF: Provides wealth management and investment banking services to clients.
2+ YOEBachelor's degree,2+ years information security or software development experience,knowledge of application and AI security,experience with SAST/DAST/SCA/API security,AWS,Python,C#,GitHub;CISSP/CSSLP/GIAC preferred.
C#, Angular, Python, AWS, GitHub, SAST, DAST, SCA, API, Mobile, AI Coding assistants, MCPs, CI/CD
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1mo
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Senior Software Engineer
Arnold, Missouri, United States
OnsiteFull Time
GRVTY
GRVTY: Develops defense technology, cyber, and intelligence software solutions.
5+ YOEUS citizen with TS/SCI and CI polygraph ability; Bachelor's degree or equivalent and 5+ years' experience; CompTIA Security+ (IAT Level II) required; deep experience designing, deploying, and administering enterprise Microsoft Windows desktop environments using MECM/MCM, MDT, Intune and virtualization/app-virtualization tools.
Microsoft Windows, MECM, MCM, OSD, MDT, Intune, Microsoft Deployment Toolkit, Microsoft Endpoint Configuration Manager, Citrix XenApp, Citrix App Layering, Microsoft APPV, MSIX App Attach, VMware Dynamic Environment Manager, Active Directory, Group Policy Management, DFS, DNS, DHCP, Microsoft Azure, Office 365, Windows Server 2016, Windows Server 2019, PowerShell, ServiceNow, DISA STIGs
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