Senior ASP.NET Developer jobs in Phoenix, AZ

Tempe, Arizona

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Today

Vaco is partnering with a national wealth management technology organization to hire a Senior Software Engineer focused on backend .NET development, API design, and modernization of core platform applications. This role will be part of a new Tempe-based engineering team and will serve as one of the most senior individual contributors locally. The immediate focus is modernizing legacy applications, including rewriting older systems into modern .NET. This is a backend-heavy role centered on C#, .N

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Full-time

Depends on Experience

Senior .NET Developer - Phoenix, AZ (Locals Only)

Phoenix, Arizona

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25d ago

Job Title: Senior .NET DeveloperLocation: Phoenix, AZ (Locals Only)Duration: Long TermExperience: 12+ Years Job Description: 12+ years of experience in .NET application development using C#, ASP.NET, .NET Core/.NET 6+, MVC, and Web APIs.Strong expertise in Microservices, RESTful APIs, Entity Framework, LINQ, SQL Server, and Azure/AWS Cloud.Experience with Angular or React, CI/CD pipelines, Git, Azure DevOps, and Agile/Scrum methodologies.Hands-on experience with application design, performance t

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Contract

Depends on Experience

Senior Full Stack .NET Developer - Remote

Remote or New York, New York

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Today

Job Role: Senior Full Stack .NET Developer Location: New York City, NY - Hybrid Duration: Long Term Project No C2C only W2 Job Summary: We are seeking an experienced Senior Full Stack .NET Developer to join our team in New York City. The ideal candidate will have strong full-stack development expertise with Angular 15+, C#/.NET, MS SQL Server, RESTful APIs, cloud platforms, and modern DevOps/CI/CD practices. Key Responsibilities: Design, develop, test, and maintain scalable full-stack web app

Contract

$DOE

Senior .NET Developer in Raleigh, NC (Possible FTE conversion)

Remote

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12d ago

Job Description: Job Title: Senior .NET Developer Duration: 3+ Months Contract with Possibility of FT Conversion Job Location: Remote/Onsite (Raleigh, NC preferred location preferred) Role Overview: The Developer, Specialist performs thorough end-to-end analysis of complex business functionality, provides technical solutions for complex business requirements, and implements enterprise-grade software solutions. This role functions as an individual contributor, capable of working inde

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Contract, Third Party

Depends on Experience

Senior Application Developer

Remote

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11d ago

Company Description We make AI safe, confidential, and compliant for companies. Verapath is an AI platform company based in Greenwich, CT, focused on managing the risks associated with artificial intelligence systems. As AI becomes increasingly foundational to business and society, organizations must proactively address security vulnerabilities, regulatory compliance, bias, and model risk. Verapath delivers AI security, governance, risk, and compliance solutions for medium-to-large enterprises d

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Full-time

100,000 - 200,000

Senior .NET Developer

Remote

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4d ago

Required Skills15+ years of experience in.NET developmentStrongC#, ASP.NET, .NET Core / .NET 6/7/8Hands-onAzureexperience: Azure Functions, App Services, Service Bus, Azure DevOps, CI/CDStrongBackend DevelopmentandMicroservices ArchitectureExpert-levelSQL Server: database design, stored procedures, performance tuningMiddle-Tier Architecture, Entity Framework, and Design PatternsStrong experience withREST APIs, Web Services, SOAP/WCFAngular or Reactexperience is a plusAI experienceis highly prefe

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Contract

Senior Lead Developer

Remote or Hybrid in Raleigh, North Carolina

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Today

NO C2CNO C2CNO C2CNO C2C Pay Rate: $59/hr on W2 Terms of Employment W2 Contract, 6 Months Remote Opportunity (Candidates in Raleigh NC are highly preferred) Overview The Developer, Specialist performs thorough end-to-end analysis of complex business functionality, provides technical solutions for complex business requirements, and implements enterprise-grade software solutions. This role functions as an individual contributor, capable of working independently and within teams, and serves as th

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Contract

$50+

Senior .NET Developer (Billing Platform)

Remote

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Today

Role Overview Contribute to development of a billing/claims platform supporting high-volume transactional systems Build and scale backend services and enterprise applications Improve and evolve existing systems and architecture Design scalable, maintainable, and extensible solutions Participate across the full SDLC , including design, development, testing, and deployment Collaborate cross-functionally to translate business requirements into technical solutions Ensure code quality through test au

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Full-time

Depends on Experience

Senior Developer (C#, C++, VB, SQL) Remote From Anywhere In Colorado

Remote or Colorado

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Today

Salary: $100,000.00 - $115,000.00 Annually Location : Statewide, CO Job Type: Full Time Job Number: EGB93608 Department: Governor's Office of Information Technology Opening Date: 08/20/2026 Closing Date: 8/25/2026 11:59 PM Mountain FLSA: Determined by Position Primary Physical Work Address: (Remote From Anywhere In CO) FLSA Status: Exempt; position is not eligible for overtime compensation. Department Contact Information: Type of Announcement: This announcement is not governed by the selection

Full-time

USD 100,000.00 - 115,000.00 per year

.NET Core Senior Software Engineer

Chandler, Arizona

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Today

Overview We are seeking a full-time .NET Core Senior Software Engineer in our Chandler, AZ location. In this role, you will be responsible for providing technical leadership and project planning for software development for Garmin's commercial aviation products as an individual contributor. Essential Functions Serves in a leadership capacity as an individual contributor for carrying out software development in C#/.NET Core framework and other selected languages for new products and/or applicati

Full-time

Senior Developer

Remote

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Today

Senior Developer - Remote Primary Location: Remote Frankfort Kentucky V-Soft Consulting is currently hiring for a Senior Developer - Remote for our premier client Frankfort, Kentucky. Education and Experience Bachelors degree in computer science, Mathematics, or related field 5+ yrs. job experience or associate degree in computer science/information technology (related field) with 2+ yrs. job-related experience 2+ year experience configuring, implementing, and troubleshooting enterprise applic

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Contract

Depends on Experience

ITPA12 - Senior Application Developer

Remote or Lansing, Michigan

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Today

Salary: $33.45 - $48.09 Hourly Location : Lansing, MI Job Type: Permanent Full Time Remote Employment: Flexible/Hybrid Job Number: 0801-26-21-175AM Department: Technology, Management and Budget Opening Date: 08/12/2026 Closing Date: 8/26/2026 11:59 PM Eastern Bargaining Unit: NON-EXCLUSIVE REPRESENTED EMPLOYEE (NERE) Job Description The supports the business operations of state agencies through a variety of services, including building management and maintenance, information technology, centrali

Full-time

USD 33.45 - 48.09 per hour

Senior Full Stack .NET Developer_ W2

Remote

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Today

Senior Full Stack .NET Developer Location: WA / TX Remote Type: Contract Experience: 15+ Years Required Skills 15+ years of experience in .NET developmentStrong C#, ASP.NET, .NET Core / .NET 6/7/8Hands-on Azure experience: Azure Functions, App Services, Service Bus, Azure DevOps, CI/CDStrong Backend Development and Microservices ArchitectureExpert-level SQL Server: database design, stored procedures, performance tuningMiddle-Tier Architecture, Entity Framework, and Design PatternsStrong experi

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Full-time

Up to 45

.NET Developer Technical Lead

Remote

•

Today

Overview We are looking for a hands-on Technical Lead and experienced .NET engineer to help lead the development of a newly formed Adherence Engineering Team . This team will design and build technology solutions that help medical practices improve patient vaccination adherence through targeted outreach and automation. Early pilot programs have already demonstrated strong results, showing over a 10% increase in vaccination rates when practices leverage patient outreach tools. This team will play

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Full-time

Depends on Experience

Senior .NET Engineer-Puerto Rico Remote

Remote or San Juan, San Juan

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Today

Position:Senior .NET Engineer Experience:8+Years Work Mode:Puerto Rico Remote Contract: 12+Month We are Lokking for a Dot net Full stack Developer-Puerto Rico Remote Frontend Development Develop and maintain responsive, modular, and high-quality Angular applications. Implement UI components using TypeScript, HTML5, CSS\LESS\SCSS, and RxJS reactive patterns. Manage global and component-level state using NgRx. Write robust unit tests using Jest to ensure high code quality and maintainability

Full-time

Lead Application Developer

Remote or Bethesda, Maryland

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Today

Analytica is seeking a Senior Developer / Task Lead to support a mission-critical, high-visibility federal government program. The ideal candidate will serve as a technical leader responsible for overseeing the design, development, and delivery of enterprise applications while ensuring alignment with federal compliance, performance, and security standards. This role combines hands-on development with leadership responsibilities across the full software development lifecycle. Analytica has been

Full-time

Remote: Full Stack Developer, Senior

Remote

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Today

Job Description Precise Systems delivers integrated, mission-ready solutions that advance warfighter readiness and strengthen our nation's most critical defense programs. Through the power of our combined capabilities, we provide deep expertise in Advanced Engineering; Digital Transformation; Electromagnetic Warfare; Interactive Training & Simulation; Physical Sciences Research; Platform Lifecycle Support; and Foreign Military Sales. Unified by decades of trusted performance and expanded throug

Full-time

USD 120,000.00 - 145,000.00 per year

Software Engineer (Senior .NET / FullStack Engineer)

Remote or St. Louis, Missouri

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Today

Position: Software Engineer (Senior .NET / FullStack Engineer) Location: Remote Duration: 6+ Months Contract Role Overview We are seeking highly skilled Senior .NET / FullStack Engineers with strong AWS and securecoding expertise. This role is critical in investigating vulnerability findings at the code level, determining root causes, implementing secure remediations, testing changes, and deploying them through Regions development pipeline. Candidates must demonstrate deep technical proficien

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Full-time, Part-time, Third Party, Contract

USD 60-70

Lead .Net Developer (Microservices) - W2 Only

Remote

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Today

This is strictly a W-2 opportunity. Maximum pay rate: $60/hour on W2 - all-inclusive Title: Senior Lead Developer (.Net) Duration: 6 months Location: Remote Top 4 Skills: C# / .NET MicroservicesJSON Web Token (JWT) authentication (or) OAuth SecurityAWS Cloud IntegrationDevOps processOverview The Developer, Specialist performs thorough end-to-end analysis of complex business functionality, provides technical solutions for complex business requirements, and implements enterprise-grade software sol

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Contract

Depends on Experience

Senior .NET Developer / Cincinnati, OH/ Candidates - REMOTE

Remote or Cincinnati, Ohio

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Today

Greetings, We're seeking a Senior Full Stack Developer with strong backend expertise in .NET Core/.NET 8 and React.js on the frontend. Join a dynamic team building modern tech solutions for a leading financial and real estate client. Senior .NET Developer w/ React.js Application Developer Application Developer Cincinnati, OH - Hybrid Permanent IMPORTANT NOTE: This role requires the submission of a code exercise, which will take a senior developer 90 minutes (or longer) to complete. Please d

Full-time

Senior ASP.NET Developer jobs in Phoenix, AZ, USA