1,812 developer engineer jobs at 455 companies in O'Fallon, IL

3mo
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Engineer I
St. Charles, Missouri, United States
OnsiteFull Time
Patriot Machine
Patriot Machine: Manufactures complex structural parts and assemblies for the aerospace industry.
Engineering degree required; US person; strong mechanical aptitude; hands-on, detail-oriented; willing to learn through a development program.
CNC machining, machining
3mo
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Controls Engineer
Bridgeton, Missouri, United States
OnsiteFull Time
Panasonic
PanasonicTokyo Stock Exchange: 6752: Manufacturer of electronics, batteries, and industrial technology solutions.
3+ YOEBachelor’s degree in engineering; 3+ years electronic control development; PLCs, embedded systems; HVAC/R control experience; strong communication and problem-solving.
PLCs, Embedded systems, Ladder logic, Structured text, Ethernet, IP, UDP, CAN, BACnet, Modbus, Altium
3mo
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Controls Engineer
Bridgeton, Missouri, United States
OnsiteFull Time, Contract
Panasonic Avionics Corporation
Panasonic Avionics CorporationTokyo Stock Exchange: 6752: Provides in-flight entertainment and connectivity systems for airlines.
3+ YOEBachelor’s degree in Electrical, Electronics, or Mechanical Engineering; 3+ years in electronic control development for HVAC/R; BOM/Engineering Change experience; PLCs, embedded systems; networking and control protocols; Altium experience preferred; strong communication and problem-solving.
PLCs, Embedded systems, Ladder logic, Structured text, Programming languages, Networking protocols, CAN, BACnet, Modbus, Altium
1d
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Test Engineer
High Ridge, Missouri, United States
OnsiteFull Time
The H-J Family of Companies
The H-J Family of Companies: Manufactures and supplies electrical components for global power distribution systems.
5+ YOEBachelor's in engineering and 5+ years testing/calibration experience with high-voltage electrical measurement systems, ISO 17025 compliance, test method development, and technical reporting.
Solidworks
2mo
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Structural Engineer
Kansas City, Missouri, United States
$71k-$101k/yr OnsiteFull Time
Wallace Design Collective
Wallace Design Collective: Multidisciplinary consulting firm providing engineering, surveying, and landscape architecture services.
0+ YOEBS in Civil or Architectural Engineering; 0-10 years experience; Proficiency with Revit, RISA-3D, RAM; ability to perform structural analysis and develop construction documents; site visits.
Revit, RISA-3D, RAM
1d
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Test Engineer
High Ridge, Missouri, United States
OnsiteFull Time
H-J Family of Companies
H-J Family of Companies: A global designer and manufacturer of products for the transformer and switchgear industries focused on innovation, quality, and employee development.
5+ YOEBachelor's in Mechanical or Electrical Engineering and 5+ years testing/calibration experience with high-voltage electrical measurement systems; ISO 17025 experience; ability to develop procedures and ensure compliance.
Solidworks
3w
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MRI Engineer
St. Louis, Missouri, United States
OnsiteFull Time
Aion Biosciences
Aion Biosciences: Builds experimental MRI hardware and biomedical imaging systems to enable biological control and aging research.
Design and build custom MRI hardware and pulse sequences, develop reconstruction and analysis pipelines, and collaborate with scientists; MRI physics, RF engineering, gradients, magnets, pulse sequence programming, and quantitative imaging experience valued.
1w
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Lead Analysis Engineer
Berkeley, Missouri, United States
$165k-$223k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
14+ YOEAbility to develop and validate requirements, lead modeling/simulation and trade studies, supervise suppliers, mentor engineers, and obtain U.S. Secret security clearance; BS in engineering or related field and extensive experience required.
1mo
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Engineer III
Chicago or Irvine or Overland Park or Omaha or St. Louis
$78k-$105k/yr OnsiteFull Time
RailPros
RailPros: Engineering and safety services for the rail and transit industry.
3+ YOEBachelor's in engineering (ABET/EAC accredited); 3+ years experience; EIT certification preferred; CAD experience; Spanish a plus.
CAD software, Mathcad, Office Suite
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
2mo
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Field Engineer
Saint Louis, Missouri, United States
$62k-$87k/yr OnsiteFull Time
Terracon
Terracon: Provides geotechnical, environmental, construction, and facilities engineering services.
Bachelor’s degree in Engineering; valid driver’s license; Engineer-in-Training (EIT) or Engineering Intern (EI) preferred.
1mo
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Software Developer
United States or Missouri or Austin or Boston or Chattanooga or Chicago or Dallas or Denver or Houston or Jefferson City or Kansas City or Los Angeles or Madison or Milwaukee or Minneapolis or Nashville or Oakland or Omaha or Phoenix or Providence or Springfield or Saint Louis or Washington
$105k-$237k/yr HybridFull Time
Husch Blackwell
Husch Blackwell: A nationwide firm providing industry-focused legal and litigation services.
5+ YOEBachelor's in CS/related (or equivalent) and 5+ years enterprise app development/AI/cloud engineering experience; strong C#, .NET, Azure, AI implementation, CI/CD, and cloud-native backend skills.
C#, .NET Core, .NET 8, ASP.NET, Azure App Services, Azure Web Apps, Azure Functions, Durable Functions, Azure Service Bus, Azure SQL Database, Docker, Azure Application Insights, Azure DevOps, GitHub Actions, Git, Azure AI Foundry, Azure OpenAI, Copilot Studio, Entra ID
1mo
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Supervising Engineer - Substation
St Louis, Missouri, United States
OnsiteFull Time
Quanta Services
Quanta ServicesNYSE: PWR: Infrastructure solutions for electric, energy, and communications industries.
7+ YOE7+ years in electric utility or EPC substation engineering, B.S. in Electrical Engineering, PE license, BLS not mentioned, strong leadership and technical knowledge of utility codes and standards.
3w
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Staff Engineer II
St. Louis, Missouri, United States
OnsiteFull Time
HR Green
HR Green: Provides engineering and technical consulting for infrastructure and community projects.
4+ YOEBachelor's in Civil Engineering, EIT (or obtain within 6 months), 4 years civil engineering experience (roadway/drainage preferred), proficiency with Civil 3D/ArcGIS/OpenRoads, strong communication.
Civil 3D, ArcGIS, OpenRoads Designer
1w
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Mechanical Engineer III
Kirkwood, Missouri, United States
OnsiteFull Time
Bausch + Lomb
Bausch + LombNYSE: BLCO: Manufacturing and selling contact lenses and eye health products.
5+ YOEBachelor's in Mechanical Engineering or equivalent experience,5+ years product development in regulated or electro-mechanical environments,SolidWorks/Autodesk Inventor proficiency,design control and regulatory knowledge,excellent communication.
SolidWorks, Autodesk Inventor, Microsoft Office Suite
1w
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Lead Analysis Engineer
Berkeley, Missouri, United States
$165k-$223k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
14+ YOEUS person able to obtain U.S. Secret clearance; BS in engineering or related; ~14+ years progressive experience; skilled in modeling, simulation, algorithm development, trade studies, testing and mentoring.
3mo
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Electrical Engineer
Lexington or St. Louis or Belleville
$85k-$115k/yr OnsiteFull Time
BFW | Marcum
BFW | Marcum: Provides multi-disciplined engineering design, planning, and construction testing services.
5+ YOEExperienced electrical engineer with PE license; 5+ years experience; Bachelors or Masters in Electrical Engineering; valid driver’s license.
AutoCAD, Revit
4w
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Requirements Engineer
St Louis, Missouri, United States
$80k-$128k/yr OnsiteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
Bachelor's in systems engineering or related (or 6 years systems engineering experience), up to 6 years engineering experience, TS/SCI clearance adjudication or ability to obtain SCI and pass polygraph; MBSE and software framework knowledge desired.
2mo
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Principal Electrical Engineer (Engineer V)
Saint Louis, Missouri, United States
RemoteFull Time
Asplundh
Asplundh: Provider of vegetation management and utility infrastructure construction services.
10+ YOE10–15+ years engineering experience; PE license; B.S. in Electrical Engineering (ABET); NEC/NESC/IEEE/ANSI expertise; strong leadership and communication; up to 30% travel; remote option possible.
NEC, NESC, IEEE, ANSI, SCADA, Power system studies
3mo
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Project Engineer
St. Louis, Missouri, United States
OnsiteFull Time
CBIZ
CBIZNYSE: CBZ: Provides professional financial, insurance, and business advisory services.
5+ YOEBS in Engineering (ABET), PE registration or 4 years’ staff engineer experience, MS Office, AutoCAD and GIS; 5+ years experience preferred.
Microsoft Office, AutoCAD, GIS

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