Senior .NET Developer jobs in Illinois

Senior .Net Engineer / Trading / Onsite / Chicago

Chicago, Illinois

•

Today

Premiere trading organization is looking to bring on a Senior Backend Engineer. They are based in Chicago's Loop and require 4 days in office. They are a fast-growing proprietary trading firm known for building ultra-low-latency systems and high-performance trading infrastructure. You'll work with cutting-edge C#, C++, microservices, low-latency systems, and high-throughput distributed services powering real-time trading execution. This role puts you directly at the core of the firm's trading te

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Full-time

150k - 170k

Senior .NET Application Modernization Project Lead

Remote

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21d ago

Hi, Job Title: Senior .NET Application Modernization Project Lead Location: Remote - Quarterly travel to Columbia, SC up to 5 days Duration: 12+ Months Job Description - We are seeking a Systems Software Programmer Project Lead to support modernization and remediation of legacy administrative systems recently migrated to the Clients IT Data Center. This role focuses on upgrading platforms, ensuring compliance with security standards, and implementing industry best practices for business contin

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Contract

65+

Sr .NET / DB2 / IBM MQ Developer-Remote - W2 Only

Remote

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11d ago

Title: Sr .NET / DB2 / IBM MQ Developer-Remote - W2 Only Location: Remote Length: Long term Restriction: W2 Only Description: Short Description: - This role focuses on building and supporting transaction-heavy services using C#, , DB2, and IBM MQ. You will work on complex integrations, high-volume processing, and modernization toward AWS & Open Shift. Key Responsibilities: Develop and maintain C# / backend services with high transaction volumes. Implement and optimize DB2 stored procedures,

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Contract

Depends on Experience

(.NET) Software Engineer Senior Consultant II

Remote or Illinois

•

Today

National General is a part of The Allstate Corporation, which means we have the same innovative drive that keeps us a step ahead of our customers' evolving needs. We offer home, auto and accident and health insurance, as well as other specialty niche insurance products, through a large network of independent insurance agents, as well as directly to consumers. Job Description Software Engineer Senior Consultant II implements applications following 12-factor principles to build out the product and

Full-time

USD 85,600.00 - 120,000.00 per year

Sr. Software Engineer (C#, .NET)

Remote

•

Today

Job Title: Sr. Software Engineer (C#, .NET) Location: Remote (Candidate should work CST Hours) Duration: 6 Months We are seeking a dedicated Sr. Software Engineer to join our team. The ideal candidate would be able to support our C# .NET 8 back-end maintenance and enhancement of our backend API that is pivotal in delivering robust services to a diverse range of clients. This crucial role involves ensuring the seamless operation and scalability of APIs that support warehousing operations and mu

Full-time

Senior Product Engineer (.NET C#/React)

Remote

•

Today

At Allstate, great things happen when our people work together to protect families and their belongings from life's uncertainties. And for more than 90 years our innovative drive has kept us a step ahead of our customers' evolving needs. From advocating for seat belts, air bags and graduated driving laws, to being an industry leader in pricing sophistication, telematics, and, more recently, device and identity protection. Job Description A Senior Product Engineer implement applications following

Full-time

USD 78,600.00 - 142,275.00 per year

Senior .NET Engineer / Full Stack / Hybrid / Bolingbrook, IL

Bolingbrook, Illinois

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Today

This activewear company is a leading wholesaler and distributor of imprintable apparel, accessories, and uniform products, serving the promotional products, e-commerce, and retail industries. They combine deep inventory, advanced logistics, and technology-driven solutions to provide our customers with speed, accuracy, and high-quality service. They are seeking a highly skilled Senior .NET Engineer to join their technology team. The ideal candidate will have deep expertise in building scalable ap

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Full-time

USD 65.00 - 75.00 per hour

Mid-Level .NET Software Engineer

Remote

•

Today

STAND 8 provides end to end IT solutions to enterprise partners across the United States and with offices in Los Angeles, New York, New Jersey, Atlanta, and more including internationally in Mexico and India We are seeking a Mid-Level .NET Software Engineer to join our global Release Engineering team. In this role, you will work in a matrixed, collaborative environment, partnering closely with Delivery and Client Success teams. You'll be responsible for developing, testing, and maintaining clie

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Full-time

$95000.00 - $120000 per annum

Senior C# Developer

Remote or Hybrid

•

Today

Our Fortune 100 direct client is hiring for an experienced Senior C# Developer to work on large-scale IT projects. You would be designing and coding in a variety of technologies supporting backend, API, and database. The ideal candidate will have strong C# development experience, has worked with front-end technologies such as angular or Vue, and back-end experience with SQL Server. This role can be done fully remotely following an EST work schedule. Does this sound like something you'd like to

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Contract

DOE

Senior Software Engineer / .NET / Hybrid in Naperville

Naperville, Illinois

•

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 6-month contract-to-hire position. They are located in the south

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Full-time

65/hr - 75/hr

Lead .NET Software Engineer - W2 candidates only

Remote

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7d ago

Required: 5+ years with Net and Net Core experience 3+ years with C# 3+ years of Web API experience 3+ years with SQL Server Design Patterns Entity Framework, LINQ RabbitMQ / Queue Mechanism Unit Testing (writing mocks) Logging, Monitoring Solution Designing Middle Layer & Backend Hands-on development experience SQL Server: Troubleshooting / Debugging existing Stored procedures, indexes etc. Azure PaaS services: Azure WebApp, Function, Azure Cost Optimization etc. Good to have understanding on D

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Contract

Depends on Experience

Sr level Full Stack Stack Engineer

Remote

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Yesterday

Sr. level Full Stack Engineer (Remote) Primary Location: Remote V-Soft Consulting is currently hiring for a Sr. level Full Stack Engineer (Remote) for our premier client. Education and Experience Preferred: Bachelors degree in computer science or related field of study. Senior level full stack experience developing secure software with Microsoft .NET technologies (C#, ASP.Net Blazor, APIs) Senior level database development experience (Microsoft SQL Server preferred) Experience with Microsoft

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Full-time

Depends on Experience

.NET Engineer (Mid Level)

Remote or Phoenix, Arizona

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Today

RESPONSIBILITIES: Kforce has a client in Phoenix, AZ that is seeking a Mid Level .NET Engineer. Essential Responsibilities * Application & API Development: * Design, develop, test, and maintain .NET applications and APIs using best practices * Troubleshoot, update, and enhance existing software, demonstrating ownership and sound design decisions * Ensure software quality through rigorous testing, debugging, and documentation Collaboration & Delivery: * Collaborate with cross-functional teams-i

Full-time

$110,000 - $140,000 annually

Mid-Level .NET Engineer/ Angular / Hybrid / Schaumburg, IL

Schaumburg, Illinois

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Today

For over 150 years, this insurance company has been a trusted leader in providing specialized property and casualty insurance solutions to clients across diverse industries - including agriculture, construction, transportation, and financial services. With a long-standing reputation for financial strength and customer commitment, they empower businesses to protect their assets, manage risk, and focus on growth with confidence. They are seeking a Mid-Level Full Stack .NET Developer to join their

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Full-time

USD 50.00 - 60.00 per hour

Lead-Data Migration Engineer- Laserfiche (.NET)

Remote

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4d ago

This is a part-time opportunity- Looking for 10-20 hours per week Role: Lead-Data Migration Engineer- Laserfiche (.Net) Remote - Travel to Florida on a need basis. This is a part-time opportunity- Looking for 10-20 hours per week. Required Qualifications Should have experience leading cloud implementation projects and managing teams. Prefer prior experience working on state government projects. Experience with cloud-based Laserfiche environments. 5+ years of hands-on experience with Laserfiche

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Contract

Depends on Experience

Sr. Software Engineer

Remote

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29d ago

Remote | Sr. Software Engineer | Full-time We are actively recruiting a Sr. Software Engineer for our client, who is offering a fully remote direct placement opportunity. All candidates are welcome to apply, though preference may be given to those who reside in Central/Mountain/Pacific time zone. This is an excellent opportunity to join a mission-driven team transforming healthcare communication through innovative software solutions. Our client is seeking a highly skilled and intellectually curi

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Full-time

Depends on Experience

Application Development Senior Advisors- Hybrid

Remote or Memphis, Tennessee

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Today

The job profile for this position is Application Development Senior Advisor, which is a Band 4 Contributor Career Track Role with Cigna-Evernorth Services Inc. Responsibilities- Provide onshore and offshore software solutions through the timely diagnosis of technical concerns and prioritization of reported errors.Use Agile Methodology to break projects into phases, emphasizing continuous collaboration and improved navigation within software development project management processes.Take lead rol

Full-time

Senior Software Engineer - .API - (Remote - North Carolina)

Remote or Raleigh, North Carolina

•

Today

Overview This is a remote role that may only be hired in the following location - North Carolina. This position provides complex technical support to data processing systems through enhancement of related software and processes. It is within the Corporate Technologies department and is responsible for providing primary advanced technical and operational business technology support for Corporate Procurement and Sourcing business functions. Develops software and procedures that improve processin

Full-time

depends on experience

Senior Software Engineer - .API - (Remote - North Carolina)

Remote or Raleigh, North Carolina

•

Today

Full-time

depends on experience

Senior Software Engineer - .API - (Remote - North Carolina)

Remote or Raleigh, West Virginia

•

28d ago

Full-time

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Senior .NET Developer jobs in Illinois, USA