Senior .Net Core Developer
3B Staffing LLC, Chicago, IL, United States
Key Responsibilities
Design, build, and operate
ASP.NET Core
services and APIs (REST/gRPC) with a focus on reliability, performance, and maintainability
Build cloud-native solutions on
Azure , leveraging services such as
App Service / AKS , Azure networking, identity, and managed data services
Implement modern architecture patterns:
microservices ,
event-driven messaging , resilient integrations, and API-first design
Establish strong engineering quality:
unit/integration testing , code reviews, static analysis, security scanning, and CI/CD automation
Build and tune observability: structured logging, metrics, tracing, dashboards, and actionable alerts
Partner with platform and security teams to implement
secure-by-default
designs (identity, secrets, encryption, access controls)
Apply
agentic Copilot
practices to accelerate delivery and improve quality:
Use Copilot Agent Mode to plan/execute changes across multiple files, assist with refactors, and generate tests and documentation
Create and maintain repo-level Copilot guidance (e.g., "copilot instructions") to standardize AI-assisted workflows across teams
Contribute patterns for "spec → implementation" decomposition and repeatable engineering automation
Minimum Qualifications
7+ years of professional software engineering experience with strong depth in
C# and .NET / ASP.NET Core
3+ years building and running services on AWS or Microsoft Azure (AKS/App Service, networking, identity, storage, monitoring)
Strong experience with
microservices , API design, distributed systems fundamentals, and integration patterns
Solid experience with
CI/CD
, branching strategies, automated testing, and release practices
Working knowledge of
containers
(Docker) and orchestration (preferably
Kubernetes/AKS )
Excellent troubleshooting skills in production environments; experience with performance tuning and incident response
Design, build, and operate
ASP.NET Core
services and APIs (REST/gRPC) with a focus on reliability, performance, and maintainability
Build cloud-native solutions on
Azure , leveraging services such as
App Service / AKS , Azure networking, identity, and managed data services
Implement modern architecture patterns:
microservices ,
event-driven messaging , resilient integrations, and API-first design
Establish strong engineering quality:
unit/integration testing , code reviews, static analysis, security scanning, and CI/CD automation
Build and tune observability: structured logging, metrics, tracing, dashboards, and actionable alerts
Partner with platform and security teams to implement
secure-by-default
designs (identity, secrets, encryption, access controls)
Apply
agentic Copilot
practices to accelerate delivery and improve quality:
Use Copilot Agent Mode to plan/execute changes across multiple files, assist with refactors, and generate tests and documentation
Create and maintain repo-level Copilot guidance (e.g., "copilot instructions") to standardize AI-assisted workflows across teams
Contribute patterns for "spec → implementation" decomposition and repeatable engineering automation
Minimum Qualifications
7+ years of professional software engineering experience with strong depth in
C# and .NET / ASP.NET Core
3+ years building and running services on AWS or Microsoft Azure (AKS/App Service, networking, identity, storage, monitoring)
Strong experience with
microservices , API design, distributed systems fundamentals, and integration patterns
Solid experience with
CI/CD
, branching strategies, automated testing, and release practices
Working knowledge of
containers
(Docker) and orchestration (preferably
Kubernetes/AKS )
Excellent troubleshooting skills in production environments; experience with performance tuning and incident response