Senior .Net Developer

Piper Companies is looking for a Sr .Net Developer to join a government contractor in Colorado Springs, CO. This role requires the candidate to report onsite in Downtown Colorado Springs and have an active Secret Clearance

Essential Duties of theSr .Net Developer:

Support a large .NET application with data analysis, reconciliation, and consolidation utilizing Net Framework, SQL Server, C#, and Entity Framework technologies

Engage in query development and reporting, user interface design and development, mobile application development, Continuous Integration/Continuous Delivery

Designing, coding, and testing applications

Creating and consuming RESTful and SOAP APIs Qualifications of theSr .Net Developer:

Bachelor's degree in Computer Science or related field

5+ years experience working on on complex technical projects, including work on highly available, national security systems

3+ years experience with the following:

Multi-source data integration and deduplication

User interface design and development

Data analysis and reconciliation

Experience with SAFe Agile delivery framework is a plus

Active Secret security clearance or above is required Compensation for theSr .Net Developer:

$120,000 - $130,000 (based on experience)

Comprehensive benefit package; Cigna Medical, Cigna Dental, Vision, 401k w/ ADP, PTO, paid holidays, sick Leave as required by law

This job opens for applications on 8/15/25. Applications for this job will be accepted for at least 30 days from the posting date

#LI-ONSITE

#LI-BM2

.NET Framework, C#, SQL Server, Entity Framework, ADO.NET, LINQ, ASP.NET, ASP.NET MVC, ASP.NET Web API, Windows Communication Foundation (WCF), Windows Presentation Foundation (WPF), Windows Forms, Visual Studio, NuGet, MSBuild, IIS, Web.config, App.config, CLR (Common Language Runtime), JIT Compilation, Garbage Collection, Strong Typing, Reflection, Delegates, Events, Generics, Dependency Injection, Inversion of Control (IoC), Repository Pattern, Unit of Work Pattern, Code First, Database First, Migrations, DbContext, DbSet, LINQ to Entities, Stored Procedures, SQL Server Management Studio (SSMS), T-SQL, Views, Indexes, Triggers, Functions, Transactions, Isolation Levels, Connection Pooling, Data Integrity, High Availability, Failover Clustering, Always On Availability Groups, Backup and Restore, Security Roles, Permissions, Encryption, SSL/TLS, Integrated Security, Windows Authentication, Role-Based Access Control (RBAC), Claims-Based Authentication, OAuth, OpenID Connect, Active Directory, Kerberos, Logging, Exception Handling, Serilog, NLog, Log4Net, Performance Counters, Threading, Asynchronous Programming, Task Parallel Library (TPL), async/await, Background Services, Middleware, Configuration Management, AppSettings, Secrets Management, Azure Key Vault, Secure Coding Practices, OWASP Top 10, Input Validation, Output Encoding, Cross-Site Scripting (XSS), SQL Injection, Code Reviews, Static Code Analysis, SonarQube, Unit Testing, MSTest, NUnit, xUnit, Integration Testing, Mocking, Moq, Continuous Integration (CI), Continuous Deployment (CD), Azure DevOps, Git, GitHub, Bitbucket, Version Control, Branching Strategies, Feature Flags, Load Balancing, Caching, Redis, MemoryCache, Distributed Systems, Microservices, Service-Oriented Architecture (SOA), Message Queues, MSMQ, RabbitMQ, Event-Driven Architecture, Health Checks, Monitoring, Application Insights, Prometheus, Grafana, Scalability, Resilience, Fault Tolerance, Disaster Recovery, Compliance, FIPS, NIST, STIG, Audit Logging, Data Classification, Data Retention, Secure APIs, Swagger, OpenAPI, JSON, XML, REST, SOAP, HTTP, HTTPS, TLS, Certificates, PKI, Code Signing, Secure Deployment Pipelines