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1,649 senior developer jobs at 491 companies in O'Fallon, MO

2mo
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Senior Developer
St. Louis, Missouri, United States
OnsiteFull Time
Rapsodo
Rapsodo: Provides portable sports performance tracking and analytics devices.
8+ YOEBachelor’s or Master’s in CS/Engineering; 8+ years mobile development (Android/iOS); 3+ years Kotlin Multiplatform; strong architecture, KMP, and cross-platform data/UI design; CI/CD; device-connected apps; AI-assisted development experience.
Kotlin, Kotlin Multiplatform, Android, iOS, SwiftUI, Jetpack Compose, Gradle, CI/CD, Dependency Injection, BLE, Wi-Fi, TCP, KMP-iOS interoperability
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1mo
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Senior Vice President, Developer Enablement
O'Fallon or Arlington or New York City or Purchase
OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global technology processing electronic payments and financial transactions.
Senior leadership role overseeing developer enablement and related strategy.
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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.
Design, develop, test, and maintain software; strong Java/Spring, cloud, CI/CD, security, and mentoring.
Java, Spring Boot, Spring Security, Maven, Hibernate/JPA, REST, SQL Server, NUnit/JUnit, Splunk, PCF, AWS, CI/CD, Jenkins, XLR, Sonar, Clover
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3mo
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Senior Software Engineer-Oracle EPM
St Louis, Missouri, United States
$105k-$204k/yr HybridFull Time
Ameren
AmerenNYSE: AEE: Generates and distributes electric and natural gas utility services.
5+ YOEBachelor’s degree plus 5+ years relevant experience; hands-on Oracle EPM and cloud integrations; senior functional knowledge in DRM/EDMCS, Hyperion, and API-based integrations.
Oracle EPM, DRM/EDMCS, Oracle Cloud EPM, EPCM, Hyperion, MuleSoft, ODI, FDMEE, SmartView, Financial Reporting Studio, API development
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Senior Full Stack Developer
St. Louis, Missouri, United States
OnsiteFull Time
Stereotaxis
StereotaxisNYSE American: STXS: Manufactures robotic surgical systems for endovascular and cardiac procedures.
5+ YOE5+ years full-stack development; Flutter or React Native; ASP.NET Core; CI/CD; Agile; real-time streaming knowledge; US work eligibility.
Flutter, ASP.NET Core, Azure, Kubernetes, LiveKit, WebRTC, SQL, NoSQL, C++, Docker
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3mo
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Senior Software Engineer- Quantitative Developer, Information Technology
St. Louis, Missouri, United States
OnsiteFull Time
NISA Investment Advisors
NISA Investment Advisors: Provides customized investment and risk management solutions for institutional investors.
5+ YOEBachelor's degree in a quantitative field; 5+ years of development; 3+ years Python; data systems design; cloud experience; collaboration with researchers; CI/CD; financial services exposure is a plus.
Python, AWS, Azure, GCP, CI/CD, SQL, Backtesting
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2mo
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Senior DevOps 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.
Python, CI/CD automation (Jenkins, Gitlab), Docker, Linux, Git, strong communication and collaboration.
Python, CI/CD (Jenkins, Gitlab), Docker, Linux, Git
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3mo
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Senior Software Engineer
St. Louis, Missouri, United States
OnsiteFull Time
Equifax
EquifaxNew York Stock Exchange: EFX: Provides consumer credit reporting and data analytics services globally.
5+ YOE5+ years software engineering experience in Java/SpringBoot, TypeScript/JavaScript, cloud tech (GCP/AWS/Azure), microservices, CI/CD, and agile practices.
Java, SpringBoot, TypeScript, JavaScript, HTML, CSS, GCP, AWS, Azure, Terraform, Helm, Jenkins, Kubernetes, Docker, Angular, Git, Maven, Gradle, JUnit, Selenium, Airflow, BigQuery, Dataflow, PubSub, Bigtable, CI/CD, Git
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1mo
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Senior Developer
Sunset Hills, Missouri, United States
RemoteFull Time
Grimco
Grimco: Manufacturer and distributor of signs and sign-making supplies.
5+ YOE5+ years professional software development, strong SQL and relational DB skills, experience building system integrations (APIs/EDI), ability to work with legacy code, clear communication, and security awareness.
SQL, RPG, IBM i, IBM Power Systems, EDI, X12, REST, JSON, APIs, ERP, Microsoft Azure, AWS
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1mo
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Senior Developer
St. Louis or United States
$106k-$133k/yr HybridFull Time
World Wide Technology
World Wide Technology: Global technology solutions provider and systems integrator.
5+ YOEUS citizenship required; 5+ years development experience; strong IAM knowledge (OAuth, OpenID Connect, SAML); Go, PostgreSQL, RabbitMQ, OpenShift/Kubernetes, Git/GitHub, CI (Codefresh, GitHub Actions), observability (Prometheus, OpenTelemetry, Grafana); Okta experience preferred.
OAuth, OpenID Connect, SAML, Okta, REST, GraphQL, Go, PostgreSQL, RabbitMQ, OpenShift, Kubernetes, Git, GitHub, Codefresh, GitHub Actions, Prometheus, OpenTelemetry, Grafana, Splunk, Vue
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2mo
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Senior Environmental Engineer
St. Louis, Missouri, United States
OnsiteFull Time
Universal Engineering Sciences
Universal Engineering Sciences: Provides engineering, environmental, and testing services for construction projects.
8+ YOESenior environmental engineer with 8+ years' experience in environmental site investigation/remediation, FG certification, and regulatory compliance.
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3mo
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Senior SQL Developer, Provider Guarantee Management - Express Scripts - Hybrid
St. Louis, Missouri, United States
HybridFull Time
The Cigna Group
The Cigna GroupNYSE: CI: Provides health insurance and pharmacy benefit management services.
4+ YOEBachelor’s degree; 4–6 years of SQL development experience; expert SQL; Visual Basic; Microsoft Office; PBM domain knowledge preferred.
SQL, Visual Basic, Microsoft Office
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3mo
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Senior Software Engineer - Aviation Displays
Olathe or St. Louis or Chandler
OnsiteFull Time
Garmin
GarminNYSE: GRMN: Designs and manufactures GPS-enabled navigation and wearable technology products.
5+ YOEBachelor’s in CS/EE/CE/SE/AE/Math/Physics plus 5+ years experience; strong software design, algorithms, leadership, and communication skills.
C, C++, Java, Data Structures, Object-Oriented Design
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2w
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Senior Application Developer
Denver or Springfield or Sterling or St. Louis
$75k-$158k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
8+ YOEBachelor's in CS or related,8+ years software development experience,expert Java and/or Python,REST APIs,databases,CI/CD,GIT,TS/SCI clearance and polygraph willingness.
Java, Python, ArcGIS, GeoServer, OpenLayers, Cesium, Kubernetes, AWS/C2S, Git, CI/CD
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21h
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Senior Software Developer
Clayton, Missouri, United States
$82k-$127k/yr OnsiteFull Time
St. Louis County
St. Louis County: Provides essential public services and governance for St. Louis County.
5+ YOEFive years professional application development experience; proficiency with C#, Java, .NET, PHP, or C++; experience designing business applications, relational databases, secure coding, and delivering technical solutions.
C#, Java, .NET, PHP, C++, Git, CI/CD, SAST, DAST
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2mo
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Software Engineer (Experienced, Senior)
Hazelwood, Missouri, United States
OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
5+ YOEExperienced senior software engineer with 5+ years C/C++, SDLC, and real-time embedded systems; eligible for security clearance.
C/C++, Python, C#, Assembly, Git, Jira, ClearCase, GreenHills Integrity
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3mo
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Senior Dam Safety Engineer
St. Louis, Missouri, United States
OnsiteFull Time
GEI Consultants
GEI Consultants: Provides multi-disciplinary engineering and environmental consulting services.
10+ YOESenior water resources/dam safety engineer with 10+ years, seller-doer, strong client relationships, leadership, and travel willingness.
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2mo
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Senior Engineer, Platform Services
St. Louis, Missouri, United States
$106k-$126k/yr OnsiteFull Time
Anheuser-Busch InBev
Anheuser-Busch InBevEuronext Brussels: ABI: Global manufacturer and distributor of beer and soft drinks.
7+ YOESenior engineer with 7+ years in platform engineering, cloud infra, SRE, Terraform, Kubernetes; Azure experience; strong automation and leadership.
Kubernetes, Terraform, GitHub Actions, Azure, PowerShell, Bash, Python, OpenTelemetry, Datadog, Grafana, Prometheus
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1mo
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Senior Mechanical Engineer - Power (Multiple Locations)
Kansas City or Saint Louis or Denver or Detroit or Chicago or Columbus
$145k-$220k/yr HybridFull Time
Burns & McDonnell
Burns & McDonnell: Engineering, architecture, and construction services for global infrastructure.
7+ YOESenior mechanical engineer with EPC project leadership, design, procurement, and construction responsibilities; 7+ years of experience; PE preferred; FE exam required or completed; ABET-accredited BS in Mechanical Engineering or related field; MS a plus.
AutoCAD, MicroStation, Bluebeam, AFT Fathom, SmartPlant, MS Office, 3D rendering software
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1w
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Senior Mobil Engineer - Android
St. Louis, Missouri, United States
HybridFull Time
Edward Jones
Edward Jones: Offers investment management and financial planning through local branches.
10+ YOE10+ years software development with 8+ years hands-on and 5+ years building enterprise Android apps; expert Kotlin, Java, Jetpack Compose, Coroutines, Flow, Hilt/Dagger; Android security and performance expertise.
Kotlin, Java, Jetpack Compose, Android Jetpack, Coroutines, Flow, Hilt, Dagger, JUnit, Espresso, MockK, Google Play Console, Azure, AWS, Google Cloud Platform
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