92 software design engineer jobs at 45 companies in O'Fallon, IL

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Design Structural Engineer
Creve Coeur, Missouri, United States
$100k-$128k/yr HybridFull Time
Apex Structural Engineering: Provides structural engineering design and construction steel connection analysis.
4+ YOEBachelor’s in civil/structural engineering; PE certification; 4+ years experience; Master’s preferred; strong communication; proficiency with design software.
Tekla Structural Designer, Excel, Idea Statica, BlueBeam, RISA Suite, Revit, Ram Connection
1mo
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Experienced Substation Design Engineer
Saint Louis, Missouri, United States
HybridFull Time
WSP
WSPToronto Stock Exchange: WSP: Provides engineering, design, and environmental consultancy services globally.
3+ YOEBachelor's in Electrical Engineering; 3-5 years in electrical engineering for power transmission/distribution; knowledge of HV substations; experience with design software; strong communication and safety practices.
CADD, Aspen, CAPE, ETAP, AutoCAD Electrical
1mo
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Software Engineer
Chesterfield, Missouri, United States
HybridFull Time
MiTek
MiTekNYSE: BRK-B: Provides software and automation for the building industry.
4+ YOEDesign, build, and evolve software solutions; .NET/C#, SQL Server; React/Angular; Agile; AI tooling.
.NET, C#, React, Angular, SQL Server, Microsoft Azure, Entity Framework, Typescript, RabbitMQ, MassTransit, SonarQube, GitHub Copilot
1mo
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C++ Software Engineer
St. Louis, Missouri, United States
OnsiteFull Time
London Stock Exchange Group
London Stock Exchange GroupLondon Stock Exchange: LSEG: Provides financial market infrastructure and global data analytics services.
2+ YOE2+ years C++ experience; OO design; full software life cycle; team collaboration; test-driven development.
C++, Linux, Python, Unix shell, JavaScript, Node.js
2mo
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Lead Software Engineer
O'Fallon, Missouri, United States
$140k-$231k/yr OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
Lead software design and architecture; build internal developer platforms; ensure secure, scalable, and high-performance software.
React, TypeScript, Backstage, AWS, Kubernetes, Terraform, CloudFormation, Splunk, CI/CD
2w
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Design and Analysis Engineer (Electronic Sys Design & Analy)
Berkeley or St. Louis
$92k-$124k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
2+ YOEBachelor's in engineering or related field, 2+ years engineering experience, systems integration, MBSE, hardware/software development, ability to obtain U.S. security clearance (U.S. citizenship required).
Model Based Systems Engineering (MBSE)
1w
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Lead Software Developer
Seattle or St. Louis or Arlington or Ridley Park or Charleston or Mesa
$183k-$265k/yr HybridFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
10+ YOEBachelor's in a technical field,10+ years developing software,data pipelines and cloud products; experience with scalable distributed systems; strong design, testing and collaboration skills.
Teams, Mattermost, GitHub
3mo
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Senior Software Engineer - Aviation Displays
Olathe or St. Louis or Chandler
OnsiteFull Time
Garmin
GarminNYSE: GRMN: Designs and manufactures GPS-enabled navigation and wearable technology products.
5+ YOEBachelor’s in CS/EE/CE/SE/AE/Math/Physics plus 5+ years experience; strong software design, algorithms, leadership, and communication skills.
C, C++, Java, Data Structures, Object-Oriented Design
3w
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Ruby Software Engineer III
Saint Louis, Missouri, United States
HybridFull Time
KNOWiNK
KNOWiNK: Provider of digital poll book and election management software.
3+ YOE3-5 years Ruby on Rails experience, strong REST API design, PostgreSQL and Git experience, TDD with RSpec/Minitest, strong communication and collaboration skills, comfortable in Agile/Scrum.
Ruby, Ruby on Rails, PostgreSQL, Git, RSpec, Minitest, JavaScript, React, Vue, Sidekiq, Delayed Job, Docker, CI/CD, Scrum
1mo
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Software Development Engineer II- Back End
Redlands or St. Louis or Vienna
$97k-$162k/yr OnsiteFull Time
Esri
Esri: Developing software for digital mapping and spatial data analysis.
2+ YOE2+ years backend engineering experience; professional experience with Python, Node.js/JavaScript, and Java; experience with ArcGIS Enterprise, containerization (Docker/Kubernetes), API design, and Top Secret/SCI clearance required; Bachelor's in STEM.
Python, Node.js, Java, ArcGIS Enterprise, ArcGIS Enterprise SDKs, Docker, Kubernetes, Azure, AWS, GCP, PostgreSQL, PostGIS, SQL Server
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Mid Software Engineer (SFA)
Saint Louis, Missouri, United States
OnsiteFull Time
Kentro
Kentro: Provider of digital and IT services for federal agencies.
5+ YOE5-7 years software development experience; proficiency in Python/Java/C#/Javascript; experience translating requirements, design, testing, deployment, database design, code reviews, and system integration. Active TS/SCI clearance and US citizenship required.
Python, Java, C#, Javascript
1mo
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Senior Software Engineer - GoLang and Python
St. Louis or Missouri or Minnesota or Nebraska or Kansas or Iowa
$88k-$157k/yr OnsiteFull Time
CGI
CGINYSE: GIB: Provides information technology and business consulting services.
Extensive experience with Python and Go, API design (REST,gRPC), GKE/GCP, microservices, CI/CD, DevOps, IaC (Terraform), SQL, Git, observability, messaging (Kafka, Pub/Sub), and integrating AI/MCP into systems.
Python, GoLang, REST, gRPC, Google Kubernetes Engine, Google Cloud Platform, Model Context Protocol (MCP), Datadog, OpenTelemetry, SQL, Git, GitHub, GitLab, Terraform, Apache Kafka, Google Pubsub, AWS SNS/SQS, Istio
3mo
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Senior Software Engineer- Quantitative Developer, Information Technology
St. Louis, Missouri, United States
OnsiteFull Time
NISA Investment Advisors
NISA Investment Advisors: Provides customized investment and risk management solutions for institutional investors.
5+ YOEBachelor's degree in a quantitative field; 5+ years of development; 3+ years Python; data systems design; cloud experience; collaboration with researchers; CI/CD; financial services exposure is a plus.
Python, AWS, Azure, GCP, CI/CD, SQL, Backtesting
1mo
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Senior Software Engineer
Arnold, Missouri, United States
OnsiteFull Time
GRVTY
GRVTY: Develops defense technology, cyber, and intelligence software solutions.
5+ YOEUS citizen with TS/SCI and CI polygraph ability; Bachelor's degree or equivalent and 5+ years' experience; CompTIA Security+ (IAT Level II) required; deep experience designing, deploying, and administering enterprise Microsoft Windows desktop environments using MECM/MCM, MDT, Intune and virtualization/app-virtualization tools.
Microsoft Windows, MECM, MCM, OSD, MDT, Intune, Microsoft Deployment Toolkit, Microsoft Endpoint Configuration Manager, Citrix XenApp, Citrix App Layering, Microsoft APPV, MSIX App Attach, VMware Dynamic Environment Manager, Active Directory, Group Policy Management, DFS, DNS, DHCP, Microsoft Azure, Office 365, Windows Server 2016, Windows Server 2019, PowerShell, ServiceNow, DISA STIGs
3w
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Software II Developer
Saint Louis or Alabama or Kentucky or Oklahoma or Arkansas or Louisiana or South Carolina or Florida or Mississippi or Tennessee or Georgia or Texas or Indiana or North Carolina or Wisconsin or Iowa or Ohio
$76k-$124k/yr RemoteFull Time
BJC Health System
BJC Health System: Non-profit health system providing comprehensive hospital and clinical care.
3+ YOEDesign, develop, test and support integrations and applications using Cloverleaf, Tcl and healthcare messaging standards (HL7, X12, XML); 3+ years healthcare IT integration experience preferred; Bachelor's degree or equivalent.
Cloverleaf, Tcl, HL7, X12, XML, MQS, Epic, Bridges, Cogito, Onbase, SQL, Perl, Python, SFTP, VPN
4w
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SDC Java Software Developer---Senior---St. Louis (St. Louis, MO, US, 63105)
St. Louis, Missouri, United States
$67k-$137k/yr HybridFull Time
EY
EY: Global firm providing audit, tax, and professional consulting services.
3+ YOEBachelor's in CS or related, minimum 3 years software development experience; back-end Java/Python/Node.js, REST, NoSQL, microservices, cloud (AWS/Azure); front-end React/Angular; API design, Git and CI/CD, TDD/BDD, agile.
Java, Python, Node.js, REST, NoSQL, Microservices, Serverless, AWS, Azure, React, Angular, Git, CI/CD, Akka, Scala, Kafka, RabbitMQ, ElasticSearch, AngularJS, ReactJS, Hadoop, Spark, Flume, Mongo, Cassandra, IaaS, PaaS, API Management, TDD, BDD
2mo
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Software Engineer - Frontend
Florissant, Missouri, United States
OnsiteFull Time
Augustine Institute
Augustine Institute: Provides Catholic theological education and media for faith formation.
Extensive experience building frontend architecture and design systems; React/Next.js web, React Native/Expo mobile; UI/UX optimization; scalable deployments; AI/SEO integration.
React, Next.js, React Native, Expo, Tailwind CSS, LaunchDarkly, New Relic, Mixpanel, Mux, Cloudflare Pages, Vercel, AWS Amplify, ECS, Fargate, EC2, S3, CloudFront, AI/SEO tooling
1w
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Mechanical Engineer
Kansas City or Wichita or St. Louis
OnsiteFull Time
HDR
HDR: Global firm providing architecture, engineering, and environmental services.
Bachelor's in Mechanical Engineering, PE license required, experience in commercial/institutional mechanical systems design, Revit MEP and manufacturer selection software experience preferred.
Revit MEP, Microsoft Office, IESVE, Trane TRACE
1mo
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Senior Plumbing Engineer
Chesterfield, Missouri, United States
OnsiteFull Time
iENG Design
iENG Design: Provides specialized mechanical and plumbing engineering and design services.
5+ YOE5+ years plumbing engineering experience, Bachelor's in Mechanical Engineering or related, proficiency with plumbing design software, knowledge of plumbing codes, strong communication and project management skills.
6d
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Associate Engineer
Saint Louis, Missouri, United States
$66k-$101k/yr OnsiteFull Time
Metropolitan St. Louis Sewer District
Metropolitan St. Louis Sewer District: Manages wastewater and stormwater systems for the St. Louis region.
Bachelor's in engineering (or final-year student) required; valid state driver's license; ability to read engineering plans, use spreadsheets/design software, prepare technical reports; pass Non-D.O.T. drug test.
CMMS, IBM Maximo