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33 c net developer jobs at 20 companies in Saint Charles, MO

11h
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.Net Developer
St. Louis, Missouri, United States
HybridFull Time
Weissman
Weissman: Designs and manufactures dance costumes and apparel.
4+ YOE4+ years professional experience with Microsoft's .NET technologies, .NET Web Forms, C# or VB.NET, HTML/JavaScript/CSS, and SQL Server; bachelor's degree preferred.
.NET Web Forms, C#, VB.NET, HTML, JavaScript, CSS, jQuery, T-SQL, Microsoft SQL Server, Microsoft IIS, Bootstrap, Foundation, Infor M3, Web Services, AJAX, SOA
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1mo
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Full Stack .NET Software Developer
Hazelwood, Missouri, United States
OnsiteFull Time
Fiserv
FiservNew York Stock Exchange: FI: Provides financial technology and payment processing services to institutions.
4+ YOEMinimum 4 years software development experience; 2+ years with C#/.NET, SQL, and a major cloud platform (AWS/Azure/GCP); experience with CI/CD, DevOps practices, and Agile methodologies.
C#, .NET, SQL, AWS, Azure, GCP, CI/CD
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1w
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Senior .Net Engineer - Real Time Product Engineering
St. Louis, Missouri, United States
HybridFull Time
London Stock Exchange Group
London Stock Exchange GroupLondon Stock Exchange: LSEG: Provides financial market infrastructure and global data analytics services.
5+ YOEBachelor's in CS or related,5+ years software development,proficiency in C# and C++,Git,SQL,knowledge of Agile/DevOps,data structures,algorithms,and strong communication skills.
C#, C++, Git, DX1, SQL, Python, Perl, AWS, Azure, Google Cloud, Docker, Kubernetes, Copilot
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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
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9h
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Senior Software Developer
Clayton, Missouri, United States
$82k-$127k/yr OnsiteFull Time
St. Louis County
St. Louis County: Provides essential public services and governance for St. Louis County.
5+ YOEFive years professional application development experience; proficiency with C#, Java, .NET, PHP, or C++; experience designing business applications, relational databases, secure coding, and delivering technical solutions.
C#, Java, .NET, PHP, C++, Git, CI/CD, SAST, DAST
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2mo
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Applications Developer
St. Louis, Missouri, United States
OnsiteFull Time
XTRA Lease
XTRA Lease: Rents and leases semi-trailers to the transportation industry.
3+ YOEBachelor's in CS or MIS; 3-5 years as a developer; .NET/C#, Angular, HTML5, CSS, SQL Server, WCF.
Microsoft .NET, C#, ASP.NET, Angular, HTML5, CSS, Microsoft SQL Server, WCF, Visual Studio, TFS
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1w
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Software Engineer
Chesterfield or Greenwood Village
$85k-$140k/yr HybridFull Time
MiTek
MiTekNYSE: BRK-B: Provides software and automation for the building industry.
2+ YOEBachelor's in CS or related, 2+ years software development experience, experience with C#/.NET, SQL Server, web fundamentals, Git, testing, and strong communication and problem-solving skills.
C#, .NET, SQL Server, HTML, CSS, JavaScript, Git, TypeScript, Angular, React, REST APIs, Azure DevOps, Azure, AWS, Application Insights, DataDog
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1mo
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Associate Software Engineer
Maryland Heights, Missouri, United States
$82k-$94k/yr HybridFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
1+ YOEBachelor's degree, ability to obtain U.S. Secret Clearance, 1+ year C#/.NET development experience; familiarity with Azure DevOps, HTML/CSS, and Agile/SAFe preferred.
C#, .NET, Azure DevOps, HTML, CSS, Scaled Agile Framework (SAFe)
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1mo
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Sr. Application Developer - Legacy System Modernization
Bridgeton, Missouri, United States
OnsiteFull Time
Cass Information Systems
Cass Information SystemsNASDAQ: CASS: Provides invoice processing and payment services for large corporations.
5+ YOE5+ years application development experience, expert C#/.NET and COBOL legacy experience, Microsoft SQL Server, Azure DevOps/GitHub, CI/CD, AI-assisted development, and ability to modernize legacy systems.
C#, .NET, COBOL, SQL, Microsoft SQL Server, GitHub, GitHub Actions, Azure DevOps, HP NonStop, CI/CD
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1mo
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Associate Software Engineer
Maryland Heights, Missouri, United States
$82k-$94k/yr HybridFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
1+ YOEBachelor's degree, ability to obtain U.S. Secret Clearance, 1+ year C# .NET development experience, familiarity with web technologies and Azure DevOps, strong communication and critical thinking skills.
C#, .NET, HTML, CSS, Azure DevOps, SAFe Agile
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4w
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Power Platform Developer
Vienna or Tysons Corner or Washington or Fairview Heights or Indianapolis
HybridContract
Cloud SynApps
Cloud SynApps: Provides Salesforce consulting and systems integration for public sector clients.
5+ YOE5+ years Microsoft Power Platform / Dynamics 365 development experience; US citizen or green card holder; ability to obtain Secret clearance; Bachelor's degree (US equivalent) required; hands-on Power Apps, Power Automate, SharePoint, Dataverse, C#, SQL, .Net experience.
Microsoft Power Platform, Microsoft Power Apps, Microsoft Power Automate, Microsoft Power BI, Microsoft SharePoint, SharePoint Designer, Microsoft Teams, Microsoft Dataverse (CDS), C#, SQL, .Net
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2w
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Entry-Level Connector Developer
Saint Louis, Missouri, United States
OnsitePart Time
Nomad eCommerce
Nomad eCommerce: Provides integrated B2B e-commerce platforms for manufacturers and distributors.
Bachelor's degree or equivalent, proficiency in C#/.NET and object-oriented languages, SQL and REST APIs, experience with JSON/XML, strong problem-solving and communication skills.
C#, .NET, REST, SQL, JSON, XML, CSV, Postman, Git, GitHub, Azure DevOps, CI/CD, HTML, CSS, JavaScript, Java, Python
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2w
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Application Developer II
St. Louis, Missouri, United States
OnsiteFull Time
McCarthy Holdings
McCarthy Holdings: National construction specializing in commercial and industrial projects.
3+ YOE3+ years developing integrations and applications using iPaaS (Boomi/Mulesoft/Snaplogic), SQL, JSON/XML, modern stacks (.NET,C#/Node.js/TypeScript/Python/Ruby), DevSecOps practices and cloud platforms (AWS/Azure).
Boomi, Mulesoft, Snaplogic, SQL, JSON, XML, Palantir, .NET 6+, C#, Node.js, TypeScript, Python, Ruby, Ruby on Rails, Sinatra, ActiveRecord, CI/CD, DAST, SAST, SCA, Checkmarx, OWASP, GitHub, Snyk, Terrascan, Terraform, SFTP, PGP, AWS, Azure, Microsoft Office 365
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3mo
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Software Engineer
Chicago or St. Louis or Philadelphia
$75k-$95k/yr HybridFull Time
ProSight Financial Association
ProSight Financial Association: Professional association for financial services research and training.
3+ YOE3+ years software engineering experience with .NET/C#, SQL, Microsoft Azure (Functions, App Services, DevOps), front-end skills (HTML, CSS, JavaScript, React.JS/Angular JS), containerization (Docker, Kubernetes), and CI/CD practices.
.NET, C#, SQL, Microsoft Azure, Azure Functions, Azure App Services, Azure DevOps, HTML, CSS, JavaScript, React.JS, Angular JS, Docker, Kubernetes, Microsoft SQL Server, MySQL, PostgreSQL, Terraform, ARM templates, PHP, CI/CD, RESTful APIs
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3mo
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Software Engineer III
St. Louis, Missouri, United States
OnsiteFull Time
Agile Defense
Agile Defense: Provides IT modernization and cybersecurity for federal government agencies.
5+ YOEActive U.S. Top Secret/SCI clearance; 5+ years software development in VB.NET/C#.NET; SQL experience; unit testing; CompTIA Security+ or Computer Science degree.
VB.NET, C#.NET, SQL, xUnit, nUnit, MSTest, Windows, Azure DevOps, Jira, CI/CD, RESTful APIs, C++
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1mo
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Sr. Engineer, Software - Archimedes
St. Louis or Brentwood or Alaska or Arizona or Arkansas or California or Connecticut or Delaware or Hawaii or Idaho or Louisiana or Maine or Massachusetts or Michigan or Mississippi or Montana or Nebraska or Nevada or New Mexico or New York or North Carolina or North Dakota or Oregon or Rhode Island or South Carolina or South Dakota or Texas or Utah or Vermont or Washington or West Virginia or Wyoming or United States
HybridFull Time
Navitus Health Solutions
Navitus Health Solutions: Transparent pharmacy benefit management and specialty pharmacy provider.
8+ YOEBachelor's in CS or related; 8+ years software engineering experience (5+ years with C#, .NET, React); experience with cloud-native, APIs, microservices, CI/CD, Git, Azure; technical leadership and mentoring experience.
C#, .NET, ASP.NET Core, React, TypeScript, JavaScript, REST APIs, GraphQL, Webhooks, API Management, Microsoft Azure App Services, Microsoft Azure Functions, Microsoft Azure Container Apps, Microsoft Azure Kubernetes Service (AKS), Microsoft Azure Storage, Microsoft Azure Databricks, Microsoft Azure Data Lake Storage Gen2, Microsoft Azure Synapse Analytics, Microsoft SQL Server, PostgreSQL, Microsoft Azure DevOps, GitHub Actions, CI/CD, Infrastructure as Code, Retrieval-Augmented Generation (RAG), Microsoft Azure OpenAI, Microsoft Azure AI Services, Intelligent Automation, Agent-Based Solutions, OWASP, OAuth2, OpenID Connect, DevSecOps, Git, Azure Repos, GitHub, TFS, Jira, Unix/Linux shell scripting
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1mo
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Mid Software Developer
O'Fallon, Illinois, United States
OnsiteFull Time
Chenega Corporation
Chenega Corporation: Provides professional government, defense, and facility support services.
2+ YOEMinimum 2 years relevant experience (or HS/GED +6 yrs); experience with AWS (S3, EC2, Lambda), Python, shell scripting, TypeScript, Node.js/Express, ASP.NET Core, C#, Postgres, Kubernetes, Docker, .NET Core, Linux, React, Java, and SQL; AWS Developer certification and TS/SCI clearance preferred; must pass background and drug screening.
Amazon S3, EC2, Lambda, AWS SDK API tools, RDS, Python, Python Flask, Bash, TypeScript, Node.js/Express, ASP.NET Core Web API, Swagger (OpenAPI), C#, Postgres, Kubernetes, Docker, .NET Core, Linux, React, JavaScript, Java, SQL, Gitlab/DevOps, ESRI, Microsoft Word, Microsoft Excel, Microsoft Office
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1d
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Software Engineer
Hopkins or Irving or Earth City
$105k-$124k/yr HybridFull Time
U.S. Bank
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
3+ YOE3+ years experience in backend (.NET 8,C#,ASP.NET Core), frontend (React,Redux), SQL Server/EF Core, REST APIs; Bachelor’s degree or equivalent; agile and DevOps familiarity; strong problem solving and communication.
.NET 8, ASP.NET Core, C#, React, Redux, SQL Server, Entity Framework Core, REST APIs
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1w
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AI Engineering Lead
Columbia, Illinois, United States
HybridFull Time
Automotive Product Consultants
Automotive Product Consultants: Provides sales, finance, and insurance services to automotive dealerships.
Proven experience integrating LLMs into production, prompt engineering, RAG, Python or .NET (C#), vector DBs, cloud AI services, and leading cross-functional AI programs.
Anthropic Claude, OpenAI, Claude Code, GitHub Copilot, Python, .NET (C#), Pinecone, pgvector, AWS Bedrock, Amazon SageMaker, Twilio, Amazon Connect, IVR
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4w
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Software Engineering Senior Manager - Hybrid
St. Louis or Whitestown or North Burlington or Tempe or Bloomfield
$138k-$230k/yr HybridFull Time
The Cigna Group
The Cigna GroupNYSE: CI: Provides health insurance and pharmacy benefit management services.
8+ YOE3+ Mgmt8+ years in software engineering or production systems, 3+ years leading technical teams; experience with enterprise production applications, cloud platforms (AWS or OpenShift), Microsoft C#.NET, C++, Angular, Oracle, Microsoft SQL Server, incident management, and Agile delivery.
AWS, OpenShift, Microsoft C#.NET, C++, Angular, Oracle, Microsoft SQL Server, Safire, Agile, AI
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