39 software engineer 1 jobs at 19 companies in O'Fallon, IL

PromotedHiringCafe
Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
3mo
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Lead Software Engineer–Developer
Berkeley, Missouri, United States
$161k-$217k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
5+ YOELead software engineering role requiring Top Secret clearance, 5+ years Java/C++, 1+ year MATLAB, and project leadership.
Java, C++, MATLAB, Git, GitLab, CMake, Linux, Windows
3mo
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Lead Software Engineer–Developer
Berkeley, Missouri, United States
$161k-$217k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
5+ YOEBachelor’s degree; active Top Secret/SCI clearance; 5+ years software engineering; 5+ years Java/C++; 3+ years leading projects; 1+ year MATLAB.
Java, C++, MATLAB, Git, GitLab, CMake, Linux, Windows
4w
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Software Engineer I, AI
Grand Rapids or Los Angeles or Washington or Troy or New York or Houston or Chicago or Owings Mills or Columbia or Richmond or Memphis or Raleigh or Boston or San Jose or San Francisco or Austin or Kalamazoo or Spokane or Denver or Fort Worth or Atlanta or Orlando or Dallas or Wilmington or Phoenix or San Antonio or Milwaukee or Madison or McLean or Huntsville or Woodbridge or Stamford or Miami or Philadelphia or Charlotte or Greenville or West Palm Beach or Costa Mesa or St. Louis or Fort Lauderdale or Seattle or Rosemont or Pittsburgh or Tulsa or Cincinnati or Cleveland or Columbus or Akron or Cherry Hill or Minneapolis or Anchorage or Salt Lake City or Norfolk or Jacksonville or Boulder or Nashville or Oak Brook or Las Vegas or Indianapolis or San Diego or Baton Rouge or Jackson or Tallahassee or Tampa or Omaha
$85k-$100k/yr OnsiteFull Time
BDO USA
BDO USA: Provides accounting, tax, and business advisory services to organizations.
1+ YOE1+ years software engineering experience; experience with AI/ML and integrating large language models preferred. Familiarity with databases/SQL, debugging and monitoring, Microsoft development stack (.Net, C#, Azure) preferred; HS required, bachelor\u0002s preferred.
Microsoft Visual Studio, VS Code, Microsoft Azure DevOps, GitHub, Microsoft SQL Server, Azure SQL, Microsoft Entity Framework, .Net, C#, Azure, SQL
1mo
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Embedded Software Engineer 2 - Avionics
Olathe or Chandler or St. Louis
OnsiteFull Time
Garmin
GarminNYSE: GRMN: Designs and manufactures GPS-enabled navigation and wearable technology products.
1+ YOEBachelor's in a related field plus 1+ year relevant experience (or equivalent). Proficiency in C/C++ and other languages, familiarity with software engineering tools (configuration management, build, debuggers, emulators, simulators, logic analyzers), and customer-facing OEM experience; aviation background preferred.
C, C++, C#, Java, Python, assembly language, configuration management systems, build processes, debuggers, emulators, simulators, logic analyzers
2w
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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
1mo
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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
2mo
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Lead Software Engineer (.Net)
Saint Louis, Missouri, United States
$112k-$141k/yr HybridMultiple Commitments Available
Safety National
Safety National: Provides specialty insurance and reinsurance for workers' compensation.
5+ YOE5+ years in software development; 1–2 years in technical leadership; strong .NET Core/C#, Azure, NoSQL/Relational DB, CI/CD, REST APIs; able to mentor and lead architecture efforts.
.NET Core, C#, Microsoft Azure, Cosmos DB, MongoDB, Docker, Kubernetes, React, Angular, Vue.js
1mo
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AI Native Software Engineer
Arlington or Milwaukee or Kirkland or Cincinnati or New York City or Cleveland or Oklahoma City or Austin or Albany or Chicago or Pittsburgh or Hartford or St. Louis or Miami or Sacramento or Raleigh or Minneapolis or Mountain View or Morristown or San Francisco or Boston or Denver or Philadelphia or Des Moines or Overland Park or Los Angeles or Walnut Creek or Charlotte or Seattle or Carmel or Houston or Redmond or Bentonville or Beaverton or Nashville or Detroit or San Diego or California or Colorado or District of Columbia or Illinois or Maine or Maryland or Massachusetts or Minnesota or New York or New Jersey or Virginia or Washington or United States
$54k-$235k/yr HybridFull Time
Accenture
AccentureNYSE: ACN: Global provider of management consulting and technology services.
3+ YOE3+ years cloud-native engineering, 1+ year building/deploying agentic solutions, 1+ year with modern AI platforms, 3+ years Python/Java and IaC (Terraform, Helm); Bachelor's in CS/Engineering or equivalent experience; strong client communication.
Anthropic, Google, OpenAI, Vertex AI, Claude, Claude SDK, Open AI SDK, Lang-graph, Crew AI, Kubernetes, Docker, Terraform, Helm, Python, Java, CI/CD, GitHub
1mo
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IT FIELD ENGINEER - TIER 1
Earth City, Missouri, United States
$20-$25/hr OnsiteFull Time
CDS Office Technologies
CDS Office Technologies: Sells and services office technology and IT solutions.
0+ YOEEntry-level Tier 1 IT Field Engineer with Windows basics, MS Office, hardware/software troubleshooting, and customer service.
Windows, Microsoft Office, Networking, Server
4w
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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
EY
EY: Global firm providing audit, tax, and professional consulting services.
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
1mo
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Mechanical Engineer - Power (Multiple Locations)
Kansas City or Saint Louis or Denver or Detroit or Chicago or Columbus
$100k-$165k/yr OnsiteFull Time
Burns & McDonnell
Burns & McDonnell: Engineering, architecture, and construction services for global infrastructure.
3+ YOE3 years mechanical engineering experience; ABET-accredited BS in Mechanical Engineering; FE/EIT preferred; MS may substitute for 1 year experience; proficient in CAD/engineering software; strong communication.
AutoCAD, BIM, Revit, 3D Rendering, Hydraulic Analysis, HVAC Analysis, Microsoft Office
5d
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Engineer in Training II - Field Services (55714)
Edwardsville, Illinois, United States
$86k-$95k/yr HybridFull Time
Modjeski and Masters
Modjeski and Masters: Designs and inspects complex bridges and transportation infrastructure.
2+ YOEBachelor's or Master's in Civil/Structural Engineering, 1–2 years relevant experience (bridge projects), ability to perform field inspections at height, background checks, and proficiency with CAD and structural analysis software.
CAD
2w
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Civil Engineer - Mid-Level
Clayton, Missouri, United States
$69k-$100k/yr HybridFull Time
Sargent & Lundy
Sargent & Lundy: Engineering and consulting services for the power industry.
1+ YOEBSCE (ABET) required, 1-2 years civil/site design experience, proficiency with MS Office, strong communication and team skills; FE/EIT, Civil 3D and drainage software experience valued.
Microsoft Office, Microsoft Excel, Civil 3D, StormCAD, PondPack, MicroStation, AutoCAD, Python, MATLAB
1mo
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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
1mo
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Geospatial Developer
Saint Louis or Belleville
OnsiteFull Time
NV5
NV5: Provides engineering, consulting, and geospatial solutions for infrastructure projects.
3+ YOEBachelor's in CS/Geography/GIS, 3+ years web application development, 1+ year ESRI geospatial app development, proficiency with HTML/HTML5/CSS/Python/JavaScript/.NET/JSON, ArcGIS Server, PostgreSQL/Oracle; U.S. citizenship and ability to obtain DoD clearance.
ESRI, Experience Builder, ESRI ArcGIS, ArcGIS Server, PostgreSQL, Oracle, HTML, HTML5, CSS, Python, JavaScript, .NET, JSON, AWS, Docker
1mo
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Geospatial Developer
Belleville or Saint Louis
OnsiteFull Time
NV5
NV5: Provides engineering, testing, inspection, and infrastructure consulting services.
3+ YOEBachelor's in CS/Geography/GIS, 3+ years web application development including 1+ year developing geospatial/ESRI apps; proficiency with HTML/HTML5/CSS, Python, JavaScript, .NET, JSON; experience with ArcGIS Server, PostgreSQL/Oracle; U.S. citizen eligible for DoD clearance.
Esri Experience Builder, ArcGIS Server, PostgreSQL, Oracle, HTML, HTML5, CSS, Python, JavaScript, .NET, JSON, AWS, Docker, REST, OGC, DevSecOps
2mo
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Project Engineer
St. Louis, Missouri, United States
OnsiteFull Time
Murphy Company
Murphy Company: Leading mechanical contractor focused on safety and client satisfaction.
1+ YOE1+ years experience in mechanical or related field; strong communication; project management software experience; team oriented; deadline and detail driven.
construction project management software
4w
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Intermediate Professional, Electrical Engineering
Burnsville or Saint Louis
OnsiteFull Time
WSP
WSPToronto Stock Exchange: WSP: Provides engineering, design, and environmental consultancy services globally.
1+ YOEBachelor's in Electrical Engineering, 1+ years relevant experience, familiarity with codes/regulations, proficiency with discipline-specific design software (CADD, Aspen, CAPE, ETAP, AutoCADD), and strong communication and technical writing skills.
CADD, Aspen, CAPE, ETAP, AutoCADD
3w
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Senior Systems Engineer - Site Reliability Engineering
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 in software engineering environments supporting Java, Web Services, C/C++, PL/SQL; 2+ years middleware (Tuxedo, WebLogic, Tomcat) and AIX/Linux sysadmin; 2+ years scripting (Shell/Bash, Python, Perl, PowerShell); 1+ year Splunk/Dynatrace; must reside in St. Louis area and be authorized to work in the U.S.
Java, Web Services, C/C++, PL/SQL, Tuxedo, WebLogic, Tomcat, AIX, Linux, Shell/Bash, Python, Perl, PowerShell, Splunk, Dynatrace, SQL
3mo
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Electrical Estimator - Water & Wastewater Construction
Phoenix or Houston or Newport Beach or St. Louis or Denver or Dallas or Kansas City
OnsiteFull Time
McCarthy Building Companies
McCarthy Building Companies: Performs commercial construction and infrastructure development projects.
1+ YOE1+ years electrical estimating experience; Bachelor's in Construction Management or Engineering; proficiency with estimating software; strong communication and organizational skills.
Microsoft Word, Microsoft Excel, Microsoft Outlook, Accubid, LiveCount, OST, QTO

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