Senior ASP.NET Developer jobs in Chicago, IL

Lisle, Illinois

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3d ago

Our client is seeking a highly experienced and motivated Senior / Lead .NET Software Engineer to join their development team. The ideal candidate will have strong full-stack development experience with ReactJS and .NET technologies, along with expertise in modernizing legacy applications and supporting Agile development environments. Responsibilities & Qualifications .NET Development Minimum 6+ years of development experience with ASP.NET / .NET Core using C# (and/or VB.NET) in Visual Studio IDE

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Contract

$43 - $47

Senior Full Stack .NET Developer

Lisle, Illinois

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Today

Hello, This is Kumar from Tek Leaders Inc, hope you are doing great. Please find the below Job Description. Role: Senior Full Stack .NET Developer Location: Lisle, IL (Hybrid position) Duration: Long Term Local Candidates Preferred due to the 4 days/week onsite requirement. Job Description: 8+ years of experience with ASP.NET / .NET Core using C# (or VB.NET) 4+ years of experience with ReactJS Experience developing Web APIs using .NET Core Strong experience with Unit Testing and API Testing Ex

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

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

Enterprise Architect IV

Remote

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3d ago

Lead Full-Stack Application Developer (.NET / Azure)1-Year Contract-to-Hire -Remote / Hybrid Hourly Rate range is $83 -$96 Candidates requiring visa sponsorship now or in the future are NOT ELIGIBLE to apply for this opportunity. C2C or 1099 not available for this opportunity! Potential candidates will need to have the ability to work W2 on Prominent payroll during the contract period.Ready to Accelerate Your Career?We're looking for a Lead Full-Stack Application Developer who wants more than ju

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Contract

Depends on Experience

Sr .Net Developer

Remote

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5d ago

Must Haves: API Development experience, .Net core stack esponsibilities: Design, develop, and maintain high-quality, production-grade software solutions aligned with enterprise standards, using Microsoft .NET (Framework and .NET Core), C#, SQL Server, and integrated system components.Contribute across all phases of the software development lifecycle, ensuring adherence to documented processes, coding standards, and quality guidelines.Collaborate with cross-functional team members to design scala

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Full-time, Third Party

65 - 70

Senior .NET Developer (Billing Platform)

Remote

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12d ago

Role OverviewContribute 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 auto

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Full-time

Depends on Experience

Application Developer - Senior

Remote

•

Today

Description Synergy Business Innovation & Solutions is a premier implementer of cutting-edge software solutions. Synergy brings the experience and expertise necessary to deliver capability that provides tangible ROI to our customers. Our core areas of expertise are in the fields of Digital Transformation, Cloud Solutions, SaaS and Low-Code/No-Code Solutions, Emerging Technologies, Data Analytics and Visualization, Information Assurance, and Business Process Re-Engineering. Synergy offers its e

Full-time

USD 100,000.00 - 120,000.00 per year

Senior Software Engineer / .NET / Hybrid in Chicagoland

Bolingbrook, Illinois

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Today

Software company looking to bring on a Senior Software Engineer. You'll be key to driving modernization and growth by developing technical solutions that enhance business operations. You will play an impactful part in modernizing legacy systems, transitioning from VB.NET to C#, and evolving web platforms from ASP.NET to Blazor. You'll also contribute to the ongoing development and improvement of the company's ERP system. This is a full-time position. They are located in the southwest suburbs of

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Full-time

$120000 - $137000

Lead .Net Developer

Lisle, Illinois

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Today

Position Overview We are looking for a skilled Lead .Net Developer to contribute to our Commercial Sales Experience (CSE) product initiative. The ideal candidate is proficient in the full software development lifecycle using an Agile framework, enhancing existing web applications, ensuring long-term application performance and can work effectively in a collaborative and fast-paced environment. Responsibilities Developing Web APIs in .NET CoreWriting extensive unit tests and Web API testingRe

Full-time

USD 112,000.00 - 168,000.00 per year

Senior Manager, Application Development (.Net, React, Databricks)

Chicago, Illinois

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Today

We're building a relationship-oriented bank for the modern world. We need talented, passionate professionals who are dedicated to doing what's right for our clients. At CIBC, we embrace your strengths and your ambitions, so you are empowered at work. Our team members have what they need to make a meaningful impact and are truly valued for who they are and what they contribute. To learn more about CIBC, please visit CIBC.com What You'll Be Doing As a Senior Manager, Application Development at CIB

Full-time

USD 160,000.00 - 180,000.00 per year

IT Application Development - Sr/Spec (ITAD-SS/ETS)

Remote or Olympia, Washington

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Today

Salary : $99,300.00 - $133,608.00 Annually Location : Thurston County - Olympia, WA Job Type: Full Time - Permanent Remote Employment: Remote Optional Job Number: 2026-07498 Department: Health Care Authority Division: ETS Opening Date: 09/09/2026 Closing Date: 9/23/2026 11:59 PM Pacific Salary Information: The high end of the salary range, Step M is typically a longevity step Description IT Application Development - Sr/Spec (ITAD-SS/ETS) 71115338 Help build the future of Washington's healthcare

Full-time

USD 99,300.00 - 133,608.00 per year

Lead Software Engineer, API Integrations

Chicago, Illinois

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21d ago

We're building a relationship-oriented bank for the modern world. We need talented, passionate professionals who are dedicated to doing what's right for our clients. At CIBC, we embrace your strengths and your ambitions, so you are empowered at work. Our team members have what they need to make a meaningful impact and are truly valued for who they are and what they contribute. To learn more about CIBC, please visit CIBC.com How You'll Succeed Strategic Development & Execution: Perform and coo

Full-time

USD 150,000.00 - 170,000.00 per year

Lead Software Engineer, API Integrations

Chicago, Illinois

•

Today

We're building a relationship-oriented bank for the modern world. We need talented, passionate professionals who are dedicated to doing what's right for our clients. At CIBC, we embrace your strengths and your ambitions, so you are empowered at work. Our team members have what they need to make a meaningful impact and are truly valued for who they are and what they contribute. To learn more about CIBC, please visit CIBC.com How You'll Succeed Strategic Development & Execution: Perform and coo

Full-time

USD 150,000.00 - 170,000.00 per year

Senior .Net Developer

Remote

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3d ago

HRA JOB TITLE: Senior .Net Developer PROJECT DESCRIPTION: ITS serves all DSS program areas to fulfill their IT needs. To meet the business needs and ITS' workload, ITS is seeking qualified candidates in the areas of Database design, architecture, and development, including base definition, structure, documentation, long-range requirements, operational guidelines, and protection. Ensures accuracy and completeness of data in master files and various support tools, such as base dictionaries. Establ

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Third Party, Contract

Depends on Experience

.NET Developer Technical Lead

Remote

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12d ago

OverviewWe 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 a

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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

Senior Backend .NET Software Engineer

Remote

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Today

Company Description Experian is a global data and technology company, powering opportunities for people and businesses around the world. We operate across a range of markets, from financial services to healthcare, automotive, agribusiness, insurance, and many more. Experian invests in people and new advanced technologies to unlock the power of data. We have an amazing team of 25,200 people in 32 countries. Job Description We help healthcare providers and insurers ensure accurate patient eligi

Full-time

USD 119,219.00 - 214,594.00 per year

Senior Software Engineer, Full Stack

Remote

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Today

Lyric is the trusted leader in healthcare decision intelligence. Built on more than 35 years of proven results, Lyric combines responsible AI with clinical, payment, regulatory, and policy expertise to deliver transparent, auditable insights in milliseconds across real-time claims workflows. Lyric augments human decision-making so health plans can make faster, more accurate payments while maintaining full control. Today, Lyric supports 200 million lives, with nine of the top 10 U.S. health plans

Full-time

Sr. Software Engineer

Hybrid in Oak Brook, Illinois

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23d ago

Senior Software Engineer (.NET / Azure / Angular) Location: Oakbrook Terrace, IL (Hybrid - Onsite Mondays & Tuesdays)- MUST CURRENTLY RESIDE IN IL No C2C, third-party vendors, or sponsorship available. About the Role Were looking for a Senior Software Engineer with a strong foundation in C#/.NET or Java development who has evolved into modern .NET and Azure technologies. This role is ideal for someone who enjoys building modern web applications, with a strong emphasis on front-end development u

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Full-time

100,000 - 128,000

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 Chicago, IL, USA