27 sr net developer jobs at 14 companies in Smyrna, DE

4d
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Senior .Net Developer
Chicago or Crum Lynne
$90k-$150k/yr HybridFull Time
TransUnion
TransUnionNYSE: TRU: Provides global credit reporting and risk management information solutions.
5+ YOE5+ years software development with strong .NET and SQL Server experience, cloud (GCP/Azure/AWS) familiarity, DevOps and container experience; bachelor's in CS/STEM preferred.
.NET Framework, Microsoft SQL Server, Google Cloud, GCP, Azure, AWS, Kubernetes, Docker, OneTru, DevOps, Continuous Deployment, Infrastructure as Code, Automated Testing, Automated Configuration Management
1mo
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Lead .Net Platform Engineer (Payments Ingestion) - Senior Vice President
New Castle or Tampa
$156k-$234k/yr HybridFull Time
Citi
CitiNYSE: C: Providing global banking, investment, and wealth management services.
Hands-on .Net engineering for high-throughput payment platforms, microservices, Kafka, Oracle/MongoDB, cloud-native (OpenShift/AWS), Kubernetes/Docker, CI/CD, Jenkins, and platform leadership; AI/ML integration and strong stakeholder communication.
.Net, React, Kafka, Oracle, Microsoft SQL, MongoDB, Spring MVC, Spring Boot, REST APIs, Jenkins, Gradle, Maven, Grafana, OpenShift, AWS, Kubernetes, Docker, GitHub Copilot, Gemini, LLMs, JVM, CI/CD, TDD, Python, Pinecone, Weaviate, LangChain, AutoGen, COBOL, Assembler, C++
2mo
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Sr. Principal Cyber Software Engineer
Annapolis Junction or San Antonio or Aurora or Carey
$149k-$235k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
8+ YOEBachelor's degree in computer science, information systems, or network engineering with 8+ years experience; strong C/C++, Java, Python; CNO tools; Windows/.NET and Unix/Linux development.
C, C++, Java, Perl, Python, Visual Studio, NET, Unix/Linux, Makefiles
1mo
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Lead Software Engineer - C# / .Net
Wilmington, Delaware, United States
$128k-$214k/yr HybridFull Time
M&T Bank
M&T BankNYSE: MTB: Provides retail, commercial, and wealth management banking services.
5+ YOE5+ years systems analysis/application development (or 7+ with associate). Expert C#/.NET experience, RESTful API and service architecture, DevOps/CI/CD familiarity, exposure to Angular, strong analytical and communication skills.
C#, .NET, RESTful APIs, Angular, CI/CD, DevOps, SDLC, Loan IQ, Finastra
1mo
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Senior Software Engineer, Medical Device
Newark, Delaware, United States
$107k-$167k/yr HybridFull Time
Hologic
HologicNASDAQ: HOLX: Develops medical technology for women's healthcare and diagnostics.
5+ YOEExpert in .NET/C# and object-oriented design with strong CS fundamentals, multithreading, debugging, CI/CD and software architecture; 5+ years (Bachelors) or 4+ years (Masters) experience; mentoring and technical leadership skills; medical device experience a plus.
.NET, C#, WPF, Java, Android, C++, C, DICOM, HL7, CICD
2w
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Lead Site Reliability Engineer
Wilmington or Jersey City or Singapore
$152k-$215k/yr OnsiteFull Time
JPMorgan Chase
JPMorgan ChaseNYSE: JPM: Global financial services firm providing banking and investment solutions.
5+ YOE5+ years SRE experience, 10+ years in regulated industry preferred; cloud experience (AWS/Azure/GCP); programming (Python/Java/.Net); observability and CI/CD tool experience; incident leadership and mentoring skills.
AWS, Azure, GCP, Python, Java Spring Boot, .Net, Grafana, Dynatrace, Prometheus, Datadog, Splunk, Jenkins, GitLab, Terraform, ECS, Kubernetes, Docker
2w
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Tech Lead Software Engineering Sr Advisor II
Berkeley Heights or Omaha or Wilmington
$186k-$286k/yr OnsiteFull Time
Fiserv
FiservNew York Stock Exchange: FI: Provides financial technology and payment processing services to institutions.
10+ YOE10+ years software engineering experience, strong Java/Spring Boot and cloud expertise, CI/CD and containerization experience, bachelor’s degree or equivalent, experience with AI-assisted development preferred.
Java, Spring Boot, .NET, Angular, Python, Microsoft Azure, Amazon Web Services (AWS), Java Persistence API (JPA), Hibernate, GitLab CI, Jenkins, Kubernetes, OpenShift, Docker, Google Cloud Platform (GCP), OAuth 2.0, JSON Web Token (JWT), transport layer security (TLS)
3d
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Senior Software Engineer
Wilmington, Delaware, United States
HybridFull Time
CSC
CSC: Provides global business administration and compliance solutions.
Strong C#/.NET Core development skills, front-end framework and JavaScript/TypeScript proficiency, experience with Entity Framework Core, SQL Server, Azure Functions, AI-assisted tools, and test automation.
C#, .NET Core, Blazor Server, Blazor WebAssembly, GitHub Copilot, Cursor, Claude Code, Entity Framework Core, SQL Server, Azure Functions, Bootstrap, Playwright, MediatR, Fluxor, Polly, Docker, Kubernetes, Artillery, JMeter, K6, Locust, Azure AI Foundry, Azure OpenAI Service, Git, React, Angular, Vue, JavaScript, TypeScript
3w
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Senior Full Stack Engineer
Broomall or United States
$150k-$175k/yr RemoteFull Time
Xactus
Xactus: Provides verification and credit reporting for mortgage lenders.
7+ YOE7+ years professional software development experience with strong hands-on C#/.NET Framework and SQL Server; experience with Angular, TypeScript/JavaScript, Azure, CI/CD tools; strong communication and problem-solving skills.
C#, .NET Framework, .NET Core, ASP.NET Web Forms, Angular, TypeScript, JavaScript, SQL Server, Azure, Jenkins, Terraform, Terragrunt, HTML, CSS
2mo
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Senior Syteline Developer I
Long Beach or Albuquerque or Middle River or Silver Spring or Littleton or Stennis Space Center
$104k-$124k/yr OnsiteFull Time
Rocket Lab
Rocket LabNASDAQ: RKLB: Designs and builds launch vehicles and satellite systems.
5+ YOE5+ years experience (or 9+ years without degree), bachelor\u0002s degree or equivalent, experience with Infor SyteLine/LN and Factory Track, T-SQL/SQL proficiency, knowledge of manufacturing processes, ERP customization and integrations.
Infor SyteLine, Infor LN, Factory Track, Infor Mongoose Framework, .NET, SQL, T-SQL, Microsoft SQL Server
2mo
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Senior Syteline Developer I
Long Beach or Albuquerque or Middle River or Silver Spring or Littleton or Stennis Space Center
OnsiteFull Time
Rocket Lab
Rocket LabNasdaq: RKLB: Operates launch vehicles and manufactures satellites for space missions.
5+ YOE5+ years ERP/MES experience with Infor SyteLine or LN; manufacturing processes; SQL/T-SQL.
Infor Syteline, Infor LN, Factory Track, SQL, T-SQL, Infor Mongoose Framework, .NET, MS SQL Server
1mo
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AI Solutions Architect
Kennett Square or Pennsylvania
HybridFull Time
Chatham Financial
Chatham Financial: An independent capital markets advisor delivering integrated advice and technology to help clients manage financial risk.
5+ YOEBachelor's in CS/IS/Engineering or equivalent, 5+ years in solutions/enterprise architecture, experience with Azure cloud services, Python, C#/.NET, TypeScript/React, OAuth2/OIDC, LLM integration patterns, CI/CD (GitHub Actions), and strong communication.
Onyx, Python, FastAPI, Azure, App Service, Functions, Cosmos DB, Blob Storage, C#, .NET, PostgreSQL, TypeScript, React, OAuth 2.0, OpenID Connect (OIDC), GitHub Actions, CI/CD, large language model (LLM)
1w
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Principal Specialist - IT ETRM Systems Dev
Newtown Square or Houston or Dallas
OnsiteFull Time
Energy Transfer
Energy TransferNYSE: ET: Operates energy infrastructure including pipelines, storage, and terminals.
10+ YOEBachelor's in IT, extensive RightAngle support/development experience, strong Microsoft SQL Server/T-SQL/SSIS and C#/.NET skills, commodity trading knowledge, leadership and communication skills.
RightAngle, Microsoft SQL Server, T-SQL, SSIS, C#, .NET
1w
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Principal Specialist - IT ETRM Systems Dev
Newtown Square or Dallas or Houston
OnsiteFull Time
Energy Transfer
Energy TransferNYSE: ET: Transports and stores natural gas and crude oil.
10+ YOEBachelor's in IT, extensive RightAngle experience, strong T-SQL/SQL Server/SSIS/C# skills, 10+ years ETRM development/support, leadership, analytic and communication skills, commodity trading knowledge.
RightAngle, SQL Server, T-SQL, SSIS, C#, .NET
1mo
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D365 F&O Technical Solution Architect
Denver or Los Angeles or Washington or Troy or New York or Houston or Chicago or Grand Rapids or Owings Mills or Richmond or Raleigh or Boston or San Jose or San Francisco or Austin or Kalamazoo or Spokane or Fort Worth or Atlanta or Orlando or Dallas or Wilmington or Phoenix or San Antonio or Milwaukee or Madison or McLean or Woodbridge or Stamford or Miami or Philadelphia or Charlotte 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 Tampa or Minneapolis or Anchorage or Salt Lake City or Jacksonville or Boulder or Nashville or Oak Brook or Las Vegas or Indianapolis or San Diego
$158k-$197k/yr OnsiteFull Time
BDO USA
BDO USA: Provides accounting, tax, and business advisory services to organizations.
6+ YOE6+ years technical D365 experience leading projects and teams; proficiency with X++, .NET/C#, SSRS, RESTful APIs, SQL, JSON, ADO/Visual Studio/LCS and D365 F&O implementation technologies; strong analytical and communication skills.
X++, .NET/C#, SSRS, RESTful API Web Services, SQL, JSON, ADO, Visual Studio, LCS, ADO Pipelines, Build Runs (Software Deployable Packages), D365 F&O, Microsoft Dynamics 365, Microsoft Dynamics Finance & Operations, Microsoft Dynamics Business Central, Business Central, Sales Cloud, Service Cloud, Marketing Cloud, Microsoft Finance and Supply Chain Management, Dynamics 365 CRM
1mo
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VP, National Broker Manager
Morristown or Chicago or Wilmington
$225k-$265k/yr HybridFull Time
W.R. Berkley Corporation
W.R. Berkley CorporationNYSE: WRB: Specialized commercial lines property and casualty insurance provider.
10+ YOE5+ Mgmt10+ years in high-net-worth personal lines business development with 5+ years in leadership; bachelor’s preferred; strong analytical, communication, and strategic partnership skills; proven ability to lead sales teams and synthesize market data.