Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior .Net Core Developer

3B Staffing LLC

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
Vacancy posted 2 days ago
Similar jobs that could be interesting for youBased on the Senior .Net Core Developer in Chicago, IL vacancy
  • $95k - $120k

    An IT recruiting firm is seeking a Senior Technical Recruiter to design, develop, and maintain software solutions. Ideal candidates should have expertise in C# .NET Core, SQL, and UI frameworks such as Angular or Blazor. The position is full-time and remote, requiring... 
    Senior
    Full time
    Work at office
    Remote work

    IT Associates

    Chicago, IL
    1 day ago
  •  ...Job Title: .NET Core Developer Location: Chicago, IL(Hybrid) Job Description/Responsibilities: The ideal candidate will have...  ...experience ~2+ years of Cloud development experience ~ Senior Developer with strong leadership and communication skills... 
    Suggested

    Georgia IT Inc

    Chicago, IL
    15 hours ago
  • High-Priority Role | Temporal.AI SDK exp Highly RequiredJob Title: Sr.NET Backend Developer with Temporal.AI SDKLocations: Onsite – Seattle, WA / Dallas, TX / Chicago, ILExperience: 12 to 15 yearsMust Have: Temporal.AI SDK + Strong.NET Core + Angular 8+
    Senior

    Kaav Inc.

    Chicago, IL
    4 days ago
  •  ...Senior.NET DeveloperOnly Chicago locals are needed. Position: Senior.NET Developer Location: Chicago, IL Duration: 6+ Months Rate: $68/hr Below is a summary of the skills needed for.NET developer team at clientShould be able to work independently with minimum hand holding... 
    Senior
    Local area

    Georgia IT Inc

    Chicago, IL
    4 days ago
  •  ...A leading HR agency is seeking an experienced .NET Programmer to join a mid-sized software company in Chicago. The role involves working on diverse projects in various fields, ensuring high-quality code delivery, and maintaining a strong focus on performance, accessibility... 
    Senior
    Flexible hours

    Human Power BG

    Chicago, IL
    3 days ago
  •  ...Senior.NET Developer (Angular + Pharma Domain)Location: Chicago, IL Experience: 12+ Years ContractWe are looking for a Senior.NET Developer with strong experience in Angular and Pharma/Life Sciences domain. The candidate will be responsible for designing, developing,... 
    Senior

    AceStack LLC

    Chicago, IL
    4 days ago
  • $55 - $60 per hour

     ...A leading global technology firm is seeking a Senior Analyst with expertise in recruiting and staffing. The ideal candidate will manage...  ...Agile methodologies. Proficiency in AWS technologies and Microsoft .NET Framework is essential. This role offers a competitive pay range... 
    Senior

    PTR Global

    Chicago, IL
    2 days ago
  •  ...Experience Strong and practical expertise in .NET development. Solid experience with...  ...sense of ownership in getting work done. Seniority Level Mid-Senior level Employment Type Full...  ...Technologies by 2x Get notified about new Dotnet Developer jobs in Chicago, IL. #J-18808-Ljbffr... 
    Senior
    Full time
    Work at office

    Hexaware Technologies

    Chicago, IL
    3 days ago
  •  ...Sr.Net DeveloperE*Pro Consulting service offerings include contingent Staff Augmentation of IT professionals, Permanent Recruiting and...  ...concepts - table/views design, Stored procedures, triggers.• Excellent core OOPS concepts.• Excellent communication skills• Good analytical... 
    Senior
    Permanent employment
    Temporary work

    E-Pro

    Chicago, IL
    4 days ago
  •  ...A growing software development company based in the United States is seeking an experienced developer with a strong background in Xamarin and C#. The ideal candidate should possess at least 4 years of experience in mobile application development and the software development... 
    Senior
    Permanent employment
    Full time

    SonSoft

    Chicago, IL
    2 days ago
  •  ...Senior C# DeveloperThis role is open with a premier trading firm located...  ...looking for someone to join the GUI Core Development team and be responsible for developing and sustaining high performance,...  ...:4+ years of experience with.NET DevelopmentStrong C# experienceNice... 
    Senior
    Work from home

    1872 Consulting

    Chicago, IL
    4 days ago
  •  ...Engineer will be responsible for performing functional testing for developed code leveraging stakeholder use cases. What You Will Do:...  ...Engineering or another related field Strong experience with.NET, C#, SQL Server Development Interest and ability to learn other... 
    Senior

    1872 Consulting

    Chicago, IL
    15 hours ago
  • $90k - $150k

     ...Support organization is responsible for developing and supporting critical insurance technology...  ...of management.Role Overview and Core ResponsibilitiesServe as a key technical...  ...scalable applications using the Microsoft .NET technology stack.Partner closely with business... 
    Senior
    Full time
    Temporary work
    Work experience placement
    Remote work
    Flexible hours

    TransUnion

    Chicago, IL
    1 day ago
  • A technology solutions company in Chicago is seeking a Senior Level C# ASP.NET Enterprise Developer to work on enterprise applications. The role requires strong experience in service-oriented architectures and database management with SQL Server. Candidates must be proficient... 
    Senior

    Idealforce

    Chicago, IL
    2 days ago
  •  ...software lifecycle coordinating with other developers. • Create Dashboards and metrics to...  ...for communication of progress to senior IT and Business leadership • Guide other...  ...applications. • Hands on experience with .Net Core or .NET 6 backend service development... 
    Senior
    Work experience placement

    HCL Global Systems

    Chicago, IL
    3 days ago
  •  ...Information Technology. The ideal applicant will have a Bachelor's degree or equivalent, alongside at least 2 years of experience in .NET, MUMPS, and SQL Server. Strong analytical skills and the ability to work in a team are essential. Interested candidates should reach... 
    Senior

    TecTammina

    Chicago, IL
    5 days ago
  • $130k - $150k

     ...Hirewell Our client is a well-known Healthcare firm seeking a Senior .NET Developer. 2-3x a week hybrid in Chicago, IL. Unable to work through...  ...Microsoft .NET/C#, including modern versions of .NET including .NET Core. • 5+ years of experience demonstrating strong understanding... 
    Senior
    Full time
    Work experience placement

    Hirewell

    Chicago, IL
    3 days ago
  •  ...Key Responsibilities: As a Senior Software Developer, you will be responsible for the development...  ...Development Languages & Tools, C#, ASP.NET/MVC, Web API, WCF, MS Visual Studio, MS...  ....NET Framework, Microsoft NET Core, SQL, NoSQL and Design Patterns ~ Excellent... 
    Senior

    3B Staffing LLC

    Chicago, IL
    2 days ago
  •  ...Senior.NET Developer with Sitefinity Organizations today are not only challenged by the constantly changing and emerging technologies, but are also confronted with difficulties in acquiring adequate human resources to meet the dynamics of the different IT Project initiatives... 
    Senior
    Full time
    Contract work
    Immediate start
    Remote work

    Reliable Software

    Oak Brook, IL
    2 days ago
  • $165.69k - $182.9k

     ...U.S. Bank is seeking a full-time Senior Software Engineer - C#/.NET (Multiple openings) in Chicago, IL....  ...deployed modules. Designing and developing Web APIs, Windows components, and microservices...  ...: C#, .Net framework, .Net Core 8.0, Web API, NUnit, Swagger, SoapUI... 
    Senior
    Full time
    Temporary work
    Local area

    U.S. Bank

    Chicago, IL
    3 days ago
  •  ...Key Responsibilities: Develop and maintain Web APIs using .NET 6 and C# Design and implement serverless architecture components using AWS...  ...years of experience in .NET development (including .NET Core 3.1 or later) ~ Strong proficiency in C# and Web API... 
    Senior

    3B Staffing LLC

    Chicago, IL
    2 days ago
  •  ...Senior.Net DeveloperChicago, IL, USA80000-140000 per year SalaryFull TimeLife Insurance, Health...  ...:The Senior.NET Full Stack Developer will support Barrow Wise's Chicago Public...  ...Our employees stand behind Barrow Wise's core values of integrity, quality, innovation... 
    Senior
    Work experience placement
    Remote work
    Flexible hours

    Barrow Wise Consulting, LLC

    Chicago, IL
    4 days ago
  • Integrated Resources Inc. is seeking a skilled .Net back-end developer with 6-8 years of experience to work on various projects. The ideal candidate will have a solid background in C#, .NET technologies and web application development, alongside strong communication skills... 
    Senior

    Integrated Resources

    Chicago, IL
    1 day ago
  • A leading consulting firm is seeking a .Net Consultant to join their dynamic team. The role requires a minimum of 4 years of experience...  ...frameworks like AngularJS. The candidate will work on developing complex Single Page Applications and must be able to collaborate... 
    Senior
    Permanent employment
    Full time

    Saxon Global

    Chicago, IL
    3 days ago
  •  ...Job Title: Senior .NET SQL Developer / Support Engineer Location: Remote Experience : 12+ years only Visa Requirement: U.S. Citizens or Green Card Holders Only Shift: Rotational shifts including off-hours & weekends (On-call support required) Work Hours: Must be able to... 
    Senior
    Permanent employment
    Contract work
    Local area
    Remote work
    Shift work
    Afternoon shift

    ETHEREUM TECHNOLOGIES LLC

    Chicago, IL
    22 hours ago
  •  ...Coherent Solutions is seeking a senior .NET Developer to contribute to large-scale enterprise platforms, including a device-focused app and a business web platform for access management. You will collaborate with cross-functional teams to deliver scalable, reliable solutions... 
    Senior

    Jobleads-US

    Oak Brook, IL
    2 days ago
  •  ...Senior.Net DeveloperIf you'd like to work with technology that makes healthcare more effective and efficient, this might be the place...  ...solutions for our clients.Job DescriptionWe seek a Senior.Net Developer to join our outstanding development team. You will participate... 
    Senior
    Temporary work
    Work at office
    Remote work
    Flexible hours

    Views

    Chicago, IL
    4 days ago
  •  ...A global consulting and tech group is seeking a highly skilled Senior Software Developer to join their Trading IT team in Chicago. This hybrid role requires 3–6 years of experience in software development, with strong knowledge in DevOps and Agile methodologies. Candidates... 
    Senior

    Talan Group

    Chicago, IL
    3 days ago
  • A technology firm is seeking a Senior .NET SQL Developer / Support Engineer for a remote role that requires over 12 years of experience, with responsibilities such as developing web applications, maintaining documentation, and providing on-call support during off-hours.... 
    Senior
    Remote job
    Shift work

    ETHEREUM TECHNOLOGIES LLC

    Chicago, IL
    4 days ago
  •  ...Software Developer Hybrid - Mondays Wednesdays, Thursdays on site. Required qualifications: Hands on experience gained through...  ...in a complex software development role Proficiency in C#/.NET (including .NET Core) and relational databases (SQL Server, PostgreSQL) Recent... 
    Senior

    Mindlance

    Chicago, IL
    5 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior .Net Core Developer. Be the first to apply!