209 csharp jobs at 88 companies in New Castle, DE

2w
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Specialist Software Engineering
Cedar Rapids or Denver or Philadelphia
$131k-$165k/yr HybridFull Time
Transamerica
TransamericaNYSE: AEG: Provides insurance, retirement solutions, and investment products to customers.
12+ YOEBachelor's degree or equivalent, 12+ years software/devops experience, strong CI/CD expertise, Python and Bash scripting, deep AWS, containerization, IaC (Terraform), Java or .NET experience, database and API knowledge.
Harness, Jenkins, Python, Bash, AWS, ECS, EKS, EC2, Lambda, S3, ASG, IAM, Docker, Nexus, Artifactory, Terraform, Visual Studio, git, Github, Maven, AgentCore, Strands, Kiro IDE, .NET, C#, JAVA, Spring Framework, J2EE, SqlServer, DynamoDB, API Gateways, Apache Camel, Swagger, Spring Boot, Spring MVC, Entity Framework, IIS, Kubernetes, Bitbucket, Angular, React, Vue.js, ASP.NET MVC, HTML, JS, CSS, Ajax, Kinesis, Event Hubs
3w
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Staff Software Engineer - Level 4 (TS/SCI)
King of Prussia, Pennsylvania, United States
$114k-$227k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
Bachelor's degree (or equivalent) in a technical discipline, extensive satellite mission planning and mission scheduling experience, technical leadership experience, proficiency with C# or Java, Agile experience, active TS/SCI clearance (polygraph) and U.S. citizenship required.
C#, Java, GitLab CI/CD
3w
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Financial Reporting AI Co-op with Drexel University
Bala Cynwyd, Pennsylvania, United States
OnsiteInternship
Susquehanna International Group
Susquehanna International Group: Global quantitative trading firm providing proprietary financial market liquidity.
Seeking students in CS, Business Analytics or related fields with programming (Python, SQL, C#), experience with NLP/LLMs, cloud (AWS/Azure/GCP), familiarity with MLOps and data modeling; curiosity and collaboration.
Python, SQL, C#, OpenAI, Claude, AWS, Azure, GCP
3w
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Financial Reporting AI Co-op with Drexel University
Bala Cynwyd, Pennsylvania, United States
OnsiteInternship
Susquehanna International Group
Susquehanna International Group: Global quantitative trading firm specializing in proprietary financial markets.
Currently enrolled student in CS, Business Analytics, or related; programming in Python/SQL/C#; experience with NLP/LLMs (OpenAI, Claude); cloud (AWS/Azure/GCP); familiarity with MLOps and data modeling.
Python, SQL, C#, OpenAI, Claude, AWS, Azure, GCP, MLOps, LLMs
3w
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Financial Reporting AI Co-op with Drexel University
Bala Cynwyd, Pennsylvania, United States
OnsiteContract, Internship
Susquehanna International Group
Susquehanna International Group: Global quantitative trading and market making firm.
Seeking a student for an AI co-op: strong programming (Python, SQL, C#), experience with NLP/LLMs, cloud platforms (AWS, Microsoft Azure, GCP), familiarity with MLOps and data modeling; curiosity and interest in financial services.
Python, SQL, C#, OpenAI, Claude, AWS, Microsoft Azure, GCP
2w
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Test Automation Engineer
Broomall, Pennsylvania, United States
$100k-$118k/yr RemoteFull Time
Xactus
Xactus: Provides verification and credit reporting for mortgage lenders.
3+ YOE3+ years QA experience with 2+ years test automation; hands-on automation in TypeScript/JavaScript, C#, or Python; experience with Selenium, Playwright, Postman, CI/CD, and observability tools; Bachelor's degree or equivalent experience preferred.
Selenium, Playwright, Postman, Datadog, TypeScript, JavaScript, C#, Python
1w
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Senior Associate, Application Security, DevSecOps
Birmingham or Bentonville or Phoenix or Tempe or Irvine or Los Angeles or Sacramento or San Diego or San Francisco or Santa Clara or Boulder or Denver or Hartford or Stamford or Washington or Fort Lauderdale or Jacksonville or Miami or Orlando or Tallahassee or Tampa or Atlanta or Des Moines or Boise or Chicago or Indianapolis or Louisville or Baton Rouge or New Orleans or Shreveport or Boston or Baltimore or Detroit or Minneapolis or Kansas City or St Louis or Jackson or Charlotte or Raleigh or Winston-Salem or Lincoln or Omaha or Montvale or Short Hills or Albuquerque or Las Vegas or Albany or Buffalo or Melville or New York or Rochester or Cincinnati or Cleveland or Columbus or Oklahoma City or Portland or Harrisburg or Philadelphia or Pittsburgh or Providence or Greenville or Knoxville or Memphis or Nashville or Austin or Dallas or Fort Worth or Houston or San Antonio or Salt Lake City or Ashburn or McLean or Richmond or Seattle or Milwaukee or Virginia Beach or El Segundo
$90k-$168k/yr OnsiteFull Time
KPMG
KPMG: Global professional services network providing audit, tax, and advisory.
4+ YOE4+ years application security/DevSecOps experience, familiarity with CI/CD, SAST/DAST, cloud (preferably Azure), programming in Java/C#/JavaScript/Python/SQL, strong threat modeling and risk assessment skills, and U.S. work authorization without sponsorship.
Java, C#, JavaScript, Python, SQL, CI/CD, SAST, DAST, Azure, OWASP
2mo
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ERP Epicor Application Specialist
Lancaster, Pennsylvania, United States
$75k-$80k/yr OnsiteFull Time
Ecore International
Ecore International: Transforms reclaimed rubber into high-performance flooring and surfacing products.
3+ YOE3+ years ERP or application support; Epicor ERP preferred; associate degree required; strong SQL/ERP customization; BAQs, BPMs, dashboards; IT security knowledge.
BAQs, BPMs, dashboards, ERP customization, SQL, MS SQL Server, SSRS, Crystal Reports, C#, Java, PowerShell, Microsoft 365, Azure, Visual Studio
1mo
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Engineering Director - Tax Product Development
New York or Boston or Chicago or Dallas or Grand Rapids or Houston or Washington or Philadelphia or Milwaukee or Denver or Seattle or Raleigh or Charlotte or Richmond or Atlanta or Orlando or Miami
$210k-$325k/yr OnsiteFull Time
BDO USA
BDO USA: Provides accounting, tax, and business advisory services to organizations.
10+ YOEBachelor's in CS/technology/engineering/math/finance/accounting with 10+ years tech experience (or HS/GED +12 years); 5+ years leadership preferred. Experience in cloud, AI, DevOps, microservices, CI/CD, containerization, SQL/NoSQL, C#, .NET, JavaScript/TypeScript, Python; Azure DevOps and ServiceNow; AZ-900 preferred.
Microsoft Office Suite, Azure, AWS, GCP, OpenAI, Anthropic, Docker, Kubernetes, SQL, NoSQL, C#, .NET, JavaScript/TypeScript, Python, Azure DevOps, ServiceNow, CI/CD, microservices, serverless, DevOps
1w
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Software Engineer - AI Accelerated Development
Blue Bell, Pennsylvania, United States
OnsiteFull Time
Signant Health
Signant Health: Provides digital evidence generation tools for clinical trial research.
Full-stack .NET (C#/ASP.NET Core) developer with hands-on agentic AI experience, LLM API integration (Anthropic/OpenAI/Bedrock/Azure OpenAI), daily Claude Code use, Python proficiency, and observability for AI features.
.NET, C#, ASP.NET Core, Claude Agent SDK, Claude Code, Anthropic, OpenAI, Bedrock, Azure OpenAI, Qdrant, pgvector, Pinecone, Python, Model Context Protocol (MCP)
3mo
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Senior Developer
Philadelphia or Westmont
OnsiteFull Time
McCabe, Weisberg & Conway
McCabe, Weisberg & Conway: Provides legal services for the mortgage banking industry.
10+ YOE10+ years in C#, T-SQL, SQL Server, .NET; strong debugging; Excel/Outlook/PDF interfacing; excellent communication; full product life cycle; Agile.
C#, T-SQL, SQL Server, NET Framework, SSRS, Excel, Outlook, PDF, REST APIs, UiPath
1mo
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Senior DevOps Engineer
Audubon, Pennsylvania, United States
OnsiteFull Time
Globus Medical
Globus MedicalNYSE: GMED: Develops and manufactures musculoskeletal and neurosurgical medical devices.
7+ YOE7+ years building and implementing CI/CD and delivery solutions for cloud, iOS, and/or Windows; BS in CS or related field (or equivalent), strong architecture and test-design knowledge.
iOS, Windows, Microsoft Visual Studio, C#, .NET, Xcode, JAMF, MDM, GitHub Actions, Terraform, Docker, podman, ECS, EKS, EC2, Lambda, S3, App Store, Google Play
2w
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Full Stack Software Developer
Camden, New Jersey, United States
$110k/yr OnsiteFull Time
Holtec International
Holtec International: Provides nuclear fuel storage systems and small modular reactors.
1+ YOEMaster's in CS/CE/IT required, 1+ year related experience, experience with .NET (Framework/Core), C#, RESTful APIs, SQL/relational databases, Git, Visual Studio, Azure DevOps, and data visualization tools.
.NET Framework, .NET Core, C#, Visual Studio, SQL, Tableau, Azure DevOps, Git, Postman, Entity Framework, HTML5/CSS3, MySQL, Power BI, Azure Cloud Services, RESTful Web APIs
1w
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Associate Software Developer
West Chester, Pennsylvania, United States
HybridFull Time
Venerable
Venerable: Manages and optimizes legacy variable annuity business blocks.
1+ YOE1+ years professional experience in AI/ML and micro-service systems; proficiency with AWS services, Python, C#, ML libraries, and enterprise software development practices.
SageMaker, Lambda, EC2, S3, EFS, SNS, SQS, EventBridge, Kinesis, Aurora, DynamoDB, RDS Proxy, Glue, Athena, Redshift, AWS Step Functions, AWS CodePipeline, Python, TensorFlow, PyTorch, scikit-learn, C#, PowerShell, SQL, JavaScript, UML, Docker, Git, GitHub, Jenkins, Bamboo, TeamCity, SpecFlow, Cucumber, Protobufs, Thrift, Avro, JSON, ODBC, Kafka, Angular, React
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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Staff Engineer - Ansys Govt Initiatives
Exton, Pennsylvania, United States
$120k-$180k/yr OnsiteFull Time
Synopsys
SynopsysNasdaq: SNPS: Provides software and IP for semiconductor design and manufacturing.
5+ YOEBS with 5+ yrs (MS with 3+ yrs or PhD with 1+ yr) in CS/Engineering; expertise in OOP, algorithms, data structures; hands-on C++, C#, Python; experience with Git/Perforce; system-level debugging and software architecture skills; mentoring experience.
C++, C#, Python, Git, Perforce, NUnit
5d
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Senior Process Engineer
Hatfield, Pennsylvania, United States
OnsiteFull Time
ITW
ITWNYSE: ITW: Global manufacturer of specialized industrial equipment and consumables.
8+ YOEB.S. in engineering or physics, 8+ years new-product electromechanical experience, hands-on assembly/debug, Python/XML scripting, SolidWorks, test plan development, ability to lift 40 lbs.
Python, XML, SolidWorks, MATLAB/Simulink, LabVIEW, C#
1mo
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Software Developer/Data Scientist
Philadelphia, Pennsylvania, United States
$79k-$123k/yr HybridFull Time
Noblis
Noblis: Nonprofit science, technology, and strategy firm supporting government missions.
3+ YOEBachelor's +5 years or Master's +3 years; strong knowledge of C#, javascript, aspx, sql, Python, R, C/C++, xml; experience with Matplotlib, Numpy, Pandas, PGMpy, Scikit-learn, SciPy; Git and modern development practices; machine learning and data visualization skills; US citizen able to obtain Secret clearance.
C#, javascript, aspx, sql, Python, R, C/C++, xml, Git, Matplotlib, Numpy, Pandas, PGMpy, Scikit-learn, SciPy, PowerBI, Oracle, NAVLOGTD, LLMs, Agile
2w
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Engineering Manager, Ecommerce
Downers Grove or Willingboro
$145k-$210k/yr OnsiteFull Time
Radwell International
Radwell International: A global distributor and reseller providing industrial automation products and ecommerce solutions.
10+ YOE5+ Mgmt10+ years software development experience, 5+ years people-management, experience with ecommerce platforms, cloud migration, microservices, APIs, and modern DevOps practices.
.NET, C#, Node.js, react.js, REST APIs, GraphQL, Microsoft SQL Server, NoSQL DB, Kafka, Azure Service Bus, Event Hub, Docker, Kubernetes, Jenkins, GitHub, Sentry, CircleCI, Spring, Tomcat, Nginx, Elastic Search, Redis, Azure, AWS, GCP, TypeScript, JavaScript, Java, SQL, HTML, CSS, MariaDB, Postgres SQL, MySQL
1mo
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Enterprise Architect - Client Reporting
Los Angeles or San Francisco or Boston or New York City or Washington or Austin or Atlanta or Chicago or Charlotte or Denver or Philadelphia or United States or United Kingdom or Canada or France or Luxembourg or Switzerland or Denmark or Asia or North America
$169k-$239k/yr OnsiteFull Time
Alpha Financial Markets Consulting
Alpha Financial Markets Consulting: Consults global asset, wealth, and insurance firms on operations.
10+ YOE10+ years in technology consulting with enterprise client reporting/data transformation experience; bachelor’s in CS/MIS (or equivalent), expertise in data platforms, ETL/ELT, SQL/C#/ .NET, BI tools, governance, and strong client-facing communication.
Snowflake, Databricks, SQL Server, Oracle, SQL, XML, C#, .NET, Assembly, ETL/ELT, SDLC, Agile, Waterfall, SCRUM, PowerBI, Tableau, SSRS, Sigma, Seismic, Kurtosys, SimCorp Coric, FactSet Vermilion, Assette, Git, GitHub, GitLab, CI/CD