27 sr net developer jobs at 16 companies in Clayton, DE

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Senior .NET Developer
Crum Lynne or Chicago or Reston or Boca Raton
$90k-$150k/yr RemoteFull Time
TransUnion
TransUnionNYSE: TRU: Provides global credit reporting and risk management information solutions.
5+ YOE5+ years building enterprise .NET applications, strong architecture and database skills, Agile experience, cloud and CI/CD familiarity, Bachelor's degree or equivalent experience.
C#, ASP.NET MVC, ASP.NET Web API, .NET Framework, .NET Core, .NET 5, .NET 6, Microsoft Visual Studio, SQL Server, PostgreSQL, AWS, Autofac, Ninject, Unity, CI/CD
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++
1mo
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Lead .Net Platform Engineer (Payments Ingestion) - Senior Vice President
New Castle or Irving
$156k-$234k/yr HybridFull Time
Citi
CitiNYSE: C: Global diversified financial services holding.
10+ YOE10+ years .Net experience, microservices, Kafka, Oracle/MongoDB, cloud-native (OpenShift/AWS), Kubernetes/Docker, CI/CD (Jenkins, Gradle/Maven), JVM performance tuning, API design, secure engineering, Agile/SAFe. Bachelor's required; Master's preferred.
.Net, REST APIs, Spring MVC, Spring Boot, Kafka, Oracle, Microsoft SQL, MongoDB, OpenShift, AWS, Kubernetes, Docker, CI/CD, Jenkins, Gradle, Maven, Grafana, GitHub Copilot, LLMs, Gemini, JVM, Python, Pinecone, Weaviate, LangChain, AutoGen, COBOL, Assembler, C++, React
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
3mo
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Software Engineer
Atlanta or Denver or New York or Albany or Baltimore or Boston or Greenville or Charleston or Columbia or Winston-Salem or Greensboro or Raleigh or Charlotte or Durham or Charlottesville or McLean or Houston or Huntsville or San Francisco or Walnut Creek or Irvine or San Diego or Glendale or Sunnyvale or Reno or Las Vegas or Nashville or Tucson or Phoenix or Washington or Wilmington
$72k-$121k/yr RemoteFull Time
Womble Bond Dickinson
Womble Bond Dickinson: Transatlantic law firm providing comprehensive legal services to businesses.
5+ YOE5+ years data engineering with Microsoft technologies; strong C#, .NET, Blazor, React, TypeScript; SQL Server/T-SQL; Azure Data Factory, Microsoft Fabric, Delta Lake; production AI/RAG experience; Git and Azure DevOps.
C#, .NET, Blazor, React, TypeScript, Microsoft Power Platform, Microsoft Power Apps, Microsoft Power Automate, Microsoft Dataverse, Azure Data Factory, Microsoft Fabric, Delta Lake, Dataflow Gen2, Azure SQL, Azure Synapse, SQL Server, T-SQL, SSRS, SSAS, Boomi, Azure AI Foundry, Microsoft Agent Framework, Copilot Studio, Microsoft Copilot, Microsoft Teams, Microsoft Office add-ins, Git, Azure DevOps
3mo
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Sr Robotics Engineer, AMR
West Chester, Pennsylvania, United States
OnsiteFull Time
CTDI: Repairs and manages logistics for telecommunications and electronic equipment.
5+ YOE5-7+ years of autonomous robotics experience; AMR focus; strong software and hardware integration; PLC/controls knowledge; excellent communication and documentation.
.NET, C#, Python, C/C++, Linux, ROS, Navigation Algorithms, Beckhoff PLC, Structured Text, SQL
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
1w
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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
2mo
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CNO Developer
Annapolis Junction, Maryland, United States
$113k-$257k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
6+ YOE6+ yrs OO programming; 6+ yrs Windows/.NET or UNIX makefiles; C, C++, Python; software life cycle; vulnerability analysis; TS/SCI with poly; BS in CS with embedded exp or 6+ yrs embedded exp
C, C++, Python, Go, Rust, Assembly
1w
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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)
1mo
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Senior Software Engineer
Wilmington or London or Amsterdam
HybridFull Time
CSC
CSC: Provides global business administration and compliance solutions.
Expertise with C# and .NET Core, Blazor, Entity Framework Core, SQL Server, Azure Functions, Playwright, JavaScript/TypeScript, and experience building AI-enabled applications and AI-augmented SDLC practices.
C#, .NET Core, Blazor Server, Blazor WebAssembly, GitHub Copilot, Cursor, Claude Code, Entity Framework Core, SQL Server, Azure Functions, Bootstrap, Playwright, JavaScript, TypeScript, Azure Pipelines, Git, MediatR, Clean Architecture, Fluxor, Polly, Artillery, JMeter, K6, Locust, Docker, Kubernetes, Azure AI Foundry, Azure OpenAI Service
2w
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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
1mo
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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
1w
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Principal Specialist - IT ETRM Systems Dev
Houston or Dallas or Newtown Square
OnsiteFull Time
Energy Transfer
Energy TransferNYSE: ET: Transports and stores natural gas and crude oil.
10+ YOEBachelor's degree in IT, experience supporting RightAngle, strong SQL/ T-SQL and stored-procedure skills, SSIS and C#/.NET development, commodity trading/Risk Management knowledge, strong communication and project skills.
RightAngle, SQL Server, T-SQL, SSIS, C#, .NET
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)
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.