11 staff software engineer jobs at 6 companies in O'Fallon, IL
2w
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Staff Software Engineer
St. Louis or Burlington
$111k-$166k/yr HybridFull Time
3+ YOEBachelor's in CS/Engineering/Data Science, 3+ years in ML/data/search systems, strong Python, backend and data engineering experience, SQL, cloud (GCP/AWS), and production ML/LLM system design.
Python, REST API, Pandas, NumPy, MLFlow, TensorFlow, PyTorch, Scikit-learn, AWS Services, GCP, Kubernetes, Bedrock, Kafka, LangGraph, LangChain, AirFlow, Qdrant, Docker, Git, CI/CD, SQL
3w
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Staff Software Engineer
St. Louis or Burlington
$111k-$166k/yr HybridFull Time
3+ YOEBachelor's degree in a quantitative field and 3+ years in machine learning, data science, search relevance, or ranking systems; strong Python, backend, data engineering, and AI systems expertise.
Python, MLFlow, TensorFlow, PyTorch, scikit-learn, RESTful APIs, SQL, Google Cloud Platform (GCP), AWS, Docker, Git, Kubernetes, Bedrock, Kafka, LangGraph, LangChain, AirFlow, Qdrant, Pandas, NumPy, Claude
2w
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Staff Software Engineer
Burlington or St. Louis
$111k-$166k/yr HybridFull Time
3+ YOEBachelor's degree in a quantitative field and at least 3 years in machine learning, data science, search relevance, or ranking systems; Python, backend, AI, data, and distributed systems expertise required.
Python, MLFlow, TensorFlow, PyTorch, Scikit-learn, REST API, Pandas, NumPy, AWS, Google Cloud Platform (GCP), Docker, Git, Kubernetes, Bedrock, Kafka, LangGraph, LangChain, AirFlow, Qdrant, SQL, CI/CD, Claude
3w
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Staff Software Engineer
St. Louis or Burlington
$111k-$166k/yr HybridFull Time
3+ YOEBachelor's in CS or related, 3+ years applied ML/data experience, strong Python and backend skills, experience with cloud, distributed systems, and large-scale data processing; leadership and mentoring experience preferred.
Python, REST API, Pandas, NumPy, AWS Services, GCP, Kubernetes, Bedrock, Kafka, LangGraph, LangChain, AirFlow, Qdrant, MLFlow, TensorFlow, PyTorch, Scikit-learn, Docker, Git, CI/CD
2w
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Staff Software Engineer
Burlington or St. Louis
$111k-$166k/yr HybridFull Time
3+ YOEBachelor’s degree in a quantitative field, 3+ years in machine learning, data science, search relevance, or ranking systems, and expertise in Python, backend systems, data engineering, and AI/LLM production systems.
Python, MLFlow, TensorFlow, PyTorch, Scikit-learn, REST API, Pandas, NumPy, AWS, Google Cloud Platform (GCP), Docker, Git, Kubernetes, Bedrock, Kafka, LangGraph, LangChain, AirFlow, Qdrant, SQL, NoSQL, CI/CD, Claude
3w
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Staff Software Engineer
St. Louis or Burlington
$111k-$166k/yr HybridFull Time
3+ YOEBachelor’s degree in a quantitative field, 3+ years in machine learning, data science, search relevance, or ranking systems; expertise in Python, AI systems, backend services, data, APIs, and cloud platforms.
Python, MLFlow, TensorFlow, PyTorch, scikit-learn, REST API, Pandas, NumPy, AWS, Google Cloud Platform (GCP), Docker, Git, CI/CD, Kubernetes, Bedrock, Kafka, LangGraph, LangChain, AirFlow, Qdrant, SQL, NoSQL, Claude
2d
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Software Engineer Senior Staff (TS/SCI Required)
St. Louis, Missouri, United States
OnsiteFull Time
7+ YOECurrent TS/SCI and ability to obtain a Counterintelligence polygraph; bachelor's degree plus 9 years or master's degree plus 7 years related experience. Requires cloud, microservices, containerization, CI/CD, scripting, and Linux expertise.
AWS, Azure, Google Cloud, Docker, Kubernetes, OpenShift, GitLab CI, Jenkins, Linux
1mo
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SDC Java Software Developer---Staff/Analyst---St. Louis (St. Louis, MO, US, 63105)
St. Louis, Missouri, United States
$55k-$113k/yr HybridFull Time
1+ YOEBachelor's in CS or related, 1+ year software development experience, backend (Java/Python/Node.js), REST/APIs, cloud (AWS/Azure), microservices, frontend (React/Angular), CI/CD, Git, testing/TDD/BDD; willing to travel up to 50%.
Java, Python, Node.js, REST, NoSQL, Microservices, Serverless, AWS, Azure, React, Angular, Akka, Scala, Kafka, RabbitMQ, ElasticSearch, Hadoop, Spark, Flume, Mongo, Cassandra, Git, CI/CD, TDD, BDD, IaaS, PaaS
2mo
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Staff Engineer
Calgary or Phoenix or Scottsdale or Pittsburgh or Columbus or Orlando or St. Louis or Edmonton or Halifax or Moncton or Ottawa or Toronto or Winnipeg or Vancouver
$200k-$240k/yr RemoteFull Time
6+ YOE6+ years with Ruby on Rails, strong OO and DDD fundamentals, experience with scale/concurrency/queuing/background processing, AWS/RDS/serverless experience, SQL/ETL/data-warehouse skills, security mindset (OWASP, SOC-2), and experience applying AI to workflows.
Ruby on Rails, AWS, RDS, SQL, OWASP, SOC-2, Domain-driven design (DDD), microservices, serverless, ETL, AI
2mo
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Staff Solar Performance Engineer - Solar (Multiple Locations)
Kansas City or Saint Louis or Phoenix or Detroit or Houston or Raleigh or Chicago
$110k-$175k/yr FieldFull Time
3+ YOEBachelor's degree in electrical engineering or related field from an ABET-accredited program, 3 years of electrical engineering experience, strong analytical and communication skills, and proficiency with engineering software.
PVsyst, SCADA, AutoCAD, MicroStation, Microsoft Office Suite
2mo
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Staff Engineer, Mobile Cross-platform
Chicago or Seattle or Creve Coeur or United States
$130k-$180k/yr HybridFull Time
8+ YOE8+ years software development experience; 2+ years building cross-platform mobile apps (Kotlin Multiplatform or React Native); iOS (Swift) and Android (Kotlin) experience; knowledge of MVVM/MVC, app store releases, git, testing; BS in CS or equivalent.
Kotlin Multiplatform, React Native, Swift, Kotlin, MVVM, MVC, git, C++, GraphQL