1,864 engineer developer jobs at 466 companies in O'Fallon, IL

4d
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DCIM Development Engineer - Senior Infrastructure Engineer
Irving or Shoreview or Manassas or Charlotte or Saint Louis
$87k-$168k/yr OnsiteFull Time
Wells Fargo
Wells FargoNYSE: WFC: Global provider of banking, investment, and mortgage financial services.
4+ YOE4+ years infrastructure engineering experience; developing applications, integrations, and automation; strong SQL and Python skills; experience with APIs, PowerShell, and enterprise tooling.
Python, PowerShell, Microsoft SQL Server, SQL, APIs, ServiceNow, Git, GitHub, Azure DevOps, DCIM
1w
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Developer
St Louis, Missouri, United States
OnsiteFull Time
Build-A-Bear
Build-A-BearNYSE: BBW: Sells customizable stuffed animals and provides interactive retail experiences.
5+ YOE5+ years software development experience, proficiency in full-stack OOP (C#, Java), relational databases, HTML/CSS/JavaScript and React, Git, RESTful API development, and Agile methodologies.
C#, Java, SQL, PostgreSQL, HTML, CSS, JavaScript, React, RESTful API, Git, Scrum, Kanban, Azure, AWS, CI/CD, DevOps
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
5d
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Civil Engineer
Scott AFB, Illinois, United States
$109k-$142k/yr OnsiteFull Time
Department of the Army
Department of the Army: A federal military department responsible for national defense and support services.
1+ YOEBachelor's in engineering (ABET or equivalent) and one year specialized civil engineering experience directing construction, managing facility programs, developing project programming/cost estimates, and leading inspection or relocation support; transcripts required.
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
1w
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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
3d
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Engineer III
Belleville, Illinois, United States
OnsiteFull Time
Astec Industries
Astec IndustriesNASDAQ: ASTE: Manufacturer of equipment for infrastructure, aggregate, and road construction.
6+ YOEBachelor's in engineering, 6+ years engineering experience, product design and document control, CAD and MS Office proficiency, project management and cross-functional collaboration.
MS Office Suite, Microsoft Excel, Microsoft Word, Microsoft Outlook, Dynamics AX, AutoDesk Design Suite, AutoCAD, Inventor, Nastran In-CAD, 3DS Max, AutoCAD Electrical
1w
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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
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
3d
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Staff Engineer
Saint Louis, Missouri, United States
OnsiteFull Time
Terracon
Terracon: Provides geotechnical, environmental, construction, and facilities engineering services.
1+ YOEBachelor's in Engineering, EIT/EI required, 1-3 years experience, driver's license may be required; performs field investigations, engineering analysis, cost estimates, and prepares reports.
1mo
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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.
5d
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Chemical Engineer
Webster Groves or St. Louis
$78k-$108k/yr OnsiteFull Time
ICL Group
ICL GroupNew York Stock Exchange: ICL: Provides mineral-based solutions for agriculture, food, and industry.
2+ YOEBS in Chemical Engineering, 2+ years industrial experience, analytical chemistry and process development skills, DOE and statistical analysis experience, strong technical writing/communication, ability to lift 50 lbs, eligible to work in the US.
Design of Experiments (DOE), Gantt Charts, Stage Gate
2w
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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.
2mo
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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
5d
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Electrical Engineer (Engineer-In-Training)
Fairview Heights or St. Louis
$66k-$82k/yr HybridFull Time
Woolpert
Woolpert: Global architecture, engineering, and geospatial services firm.
Bachelor's in Electrical Engineering (ABET), ability to perform engineering computations, field investigations, CAD and Microsoft Office proficiency, strong communication and analytical skills.
Microsoft Office, CAD
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.
1mo
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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
2w
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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.

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