110 systems software engineer jobs at 42 companies in Berkeley, MO
2mo
Save
Mark Applied
Hide
Software Systems Engineer
Hazelwood, Missouri, United States
$135k-$165k/yr OnsiteFull Time
Bachelor's degree required; active U.S. Secret clearance with ability to obtain TS/SCI; DoD 8140 foundational qualifications; experience with MBSE (Cameo, Catia Magic, DoDAF), .Net Framework, SysML/UML, DoD contract requirements, system architecture, software design and testing.
Cameo System Modeler, Catia Magic System of Systems, DoDAF, .Net Framework, sysML, UML, Subversion, Azure DevOps, Git
2mo
Save
Mark Applied
Hide
Software Systems Engineer
Hazelwood, Missouri, United States
$135k-$165k/yr OnsiteFull Time
Bachelor's degree, active U.S. Secret clearance, ability to obtain TS/SCI, DoD 8140 foundational qualifications, MBSE experience (Cameo/CATIA Magic/DoDAF), .Net Framework, sysML/UML, DoD contract experience, software architecture and verification.
Cameo System Modeler, Catia Magic, DoDAF, .Net Framework, sysML, Unified Modeling Language, Subversion, Microsoft Azure DevOps, Git
1mo
Save
Mark Applied
Hide
Mid Systems Engineer
Denver or St. Louis or Sterling or Springfield
$69k-$142k/yr OnsiteFull Time
4+ YOETS/SCI required, bachelor in engineering/CS or equivalent, 4+ years systems engineering on software-intensive systems, requirements analysis, interface documentation, V&V, Agile experience, ability to work onsite at a government facility.
SAFe, MBSE
1mo
Save
Mark Applied
Hide
Mid Systems Engineer
Denver or Springfield or Sterling or St. Louis
$69k-$142k/yr OnsiteFull Time
4+ YOETS/SCI clearance required, ability to obtain polygraph; Bachelor's in engineering or related (or equivalent); 4+ years systems engineering on software-intensive systems; requirements, interface, and V&V experience; Agile/SAFe experience; strong technical writing.
SAFe, MBSE
3w
Save
Mark Applied
Hide
Software Engineer
Hazelwood, Missouri, United States
OnsiteFull Time
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
3w
Save
Mark Applied
Hide
F-15 Mission Systems Software Engineer (Associate, Experienced, & Senior)
Berkeley, Missouri, United States
$99k-$217k/yr OnsiteFull Time
Bachelor's in engineering or related field, ability to obtain U.S. Secret clearance/U.S. Person status, 2+ years with C/C++/C#/Python/Java/Ada and object-oriented development, experience designing architectures and embedded real-time software, Agile and DevOps exposure.
C, C++, C#, Python, Java, Ada, GitLab, Git Bash, Gradle, Jira, Jenkins, Artifactory, RTOS, Agile, SAFe
2mo
Save
Mark Applied
Hide
Systems Integration Testing Engineer
St Louis, Missouri, United States
$112k-$179k/yr OnsiteFull Time
6+ YOEMust hold Top Secret clearance and be willing to upgrade to TS/SCI with polygraph. BS in systems/electrical/physics/software engineering (or related) with 8 years' systems engineering experience (6 years with Master's). Experience in sensor imaging systems, test design, data verification, and strong written/oral communication required.
1mo
Save
Mark Applied
Hide
Systems/Controls Engineer II
Kirkwood, Missouri, United States
OnsiteFull Time
3+ YOEBachelor's degree in engineering or computer science (or equivalent experience), 3+ years engineering experience with software emphasis, software V&V and regression testing experience, ability to author and review SRS/SDS/SAD/test protocols, strong communication and organizational skills.
Microsoft Office, Aras PLM, D2, C/C++, C#, Python
1mo
Save
Mark Applied
Hide
Software Engineer I
St. Louis, Missouri, United States
OnsiteFull Time
0+ YOEBS in EE/Software Engineering/Computer Science,0–3 years experience in desktop or embedded development,proficiency with C/C++,C#,Visual Basic,SQL,Java,IDE experience,embedded systems and hardware testing.
C, C++, C#, Visual Basic, SQL, Java, Microsoft Visual Studio
1mo
Save
Mark Applied
Hide
Systems Engineer- St. Louis, MO or Solon, OH
St. Louis or Solon
OnsiteFull Time
5+ YOEBachelor's in EE/CE/CS/Systems Engineering,5+ years system analysis/design experience, RF communications and hardware/software development experience,ability to write specifications and collaborate cross-functionally.
Microsoft Excel
4w
Save
Mark Applied
Hide
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
2d
Save
Mark Applied
Hide
Senior Software Engineer
St. Louis, Missouri, United States
OnsiteFull Time
5+ YOEBachelor's degree preferred and 5+ years of software development experience preferred. Requires C++ proficiency with Visual Studio, MFC, and Qt, plus object-oriented design, multithreading, STL, embedded systems, and medical device software experience.
C++, Microsoft Visual Studio, MFC, Qt, STL, OpenGL
1mo
Save
Mark Applied
Hide
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
2mo
Save
Mark Applied
Hide
Lead Software Engineer
O'Fallon, Missouri, United States
$140k-$231k/yr OnsiteFull Time
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
1mo
Save
Mark Applied
Hide
Principal Engineer - Systems
St. Louis, Missouri, United States
RemoteFull Time
11+ YOE11+ years software and infrastructure engineering experience, expertise in cloud (Azure), security (MFA, SSO, MIM, OTP), distributed systems, and strong stakeholder communication and mentoring skills.
Microsoft Active Directory, Microsoft Entra, AppSec, MFA, SSO, MIM, OTP, Azure
1w
Save
Mark Applied
Hide
Lead Software Engineer - St. Louis Office
St. Louis, Missouri, United States
OnsiteFull Time
6+ YOE6+ years with Java, Python, C++, or C#; software architecture and system design expertise; CI/CD, testing, cloud platforms, mentoring, and a bachelor's degree or relevant experience.
Java, Python, C++, C#, CI/CD, AWS, Microsoft Azure
1mo
Save
Mark Applied
Hide
Software Engineer IV – ERP Finance (Oracle/PLSQL)
Saint Louis, Missouri, United States
HybridFull Time
2+ YOE2+ years Oracle and PL/SQL experience; ERP/financial systems development, software lifecycle knowledge, cloud/native and API familiarity, strong communication and problem-solving skills.
Oracle, PL/SQL, Java, Spring, API Gateway, AWS
1w
Save
Mark Applied
Hide
Software Engineer 2 (AI/GenAI)
Earth City or Denver or Hopkins or Cincinnati or Irving or Brookfield
$98k-$116k/yr HybridFull Time
3+ YOEBachelor's degree or equivalent experience; 3–5 years of relevant experience. Requires AI/GenAI, LLM, RAG, cloud, full-stack, distributed systems, and DevOps expertise.
Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), LangChain, LangGraph, Semantic Kernel, Azure OpenAI, Azure AI Services, AWS Bedrock, REST APIs, GraphQL, Java, Python, Spring Boot, FastAPI, Node.js, vector databases, SQL Server, PostgreSQL, MongoDB, Docker, Kubernetes, CI/CD, GitHub, GitHub Copilot, Azure, AWS
4d
Save
Mark Applied
Hide
F-15 Mission Systems International Software OFP Captain
Berkeley, Missouri, United States
$148k-$200k/yr OnsiteFull Time
7+ YOEBachelor's degree and 7 years of embedded real-time software development experience required. U.S. citizenship, ability to obtain Secret clearance, and export-control eligibility required.
Ada, C, C++, Python, GIT, JIRA, BitBucket, VxWorks, OpenGL, DOORS
2w
Save
Mark Applied
Hide
Embedded Software Engineer Intern
Bridgeton or St. Louis
$41k-$53k/yr OnsiteInternship
High school diploma or GED and current junior-level or above enrollment in a bachelor's program; basic knowledge of C, C++, C#, Java, Python, git, operating systems, and Microsoft Office.
C, C++, C#, Java, Python, git, MATLAB, Simulink, Windows, Linux, Microsoft Office
Explore Jobs