C# Jobs in Illinois

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Lead Software Engineer - Backend (Hybrid/Onsite)

Visa Inc.

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Remote or Bellevue, Washington, USA

Full-time

Company Description Visa is a world leader in payments and technology, with over 259 billion payments transactions flowing safely between consumers, merchants, financial institutions, and government entities in more than 200 countries and territories each year. Our mission is to connect the world through the most innovative, convenient, reliable, and secure payments network, enabling individuals, businesses, and economies to thrive while driven by a common purpose - to uplift everyone, everywhe
Posted 14 days ago | Updated 5 hours ago

Lead Software Engineer, Design Technology

Tesla Motors

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Remote or Austin, Texas, USA

Full-time

Design Technology is responsible for making the tools Design Engineers use to design, e.g., batteries, Optimus, Robotaxi, and all new factories, every bit as intelligent and dynamic as the products themselves. As a Technical Lead Software Engineer, you will lead the research, development, delivery, and site reliability of products that touch virtually every part of our design process. Joining our team means directly impacting Tesla's ability to ship millions of products a year from factories ar
Posted 21 days ago | Updated 5 hours ago

Information Security Consultant - Threat Detection & Adversary Simulation

Mass Mutual Financial Group

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Remote or Boston, Massachusetts, USA

Full-time

The Opportunity Within our Enterprise Cybersecurity organization, you will work closely with the Security Intelligence team and be responsible for leverage real world adversarial techniques to perform pen tests and simulate attacks on existing and upcoming services spanning across applications, servers, and end-user assets. The Team Within the Security Operations Center, partner with Incident Response Teams for Red/Purple Team assessments and work with Security Intelligence to identify and test
Posted 60+ days ago | Updated 5 hours ago

(USA) Software Engineer III

Walmart Inc.

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Remote or Denver, Colorado, USA

Full-time

Position Summary Are you a seasoned software engineer looking to make a significant impact? Join Walmart/VIZIO as a Software Engineer in our Content Services team. This is a unique opportunity to work on cutting-edge technology, shape our software solutions, and help drive the future of our digital content. What you'll do About the Team: The Content Services team at Walmart/VIZIO is dedicated to delivering top-tier digital content experiences. We operate with a focus on innovation and scalabi
Posted 28 days ago | Updated 5 hours ago

Software Engineer - Remote

Donnelley Financial Solutions

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Remote

Full-time

Join a dynamic team at the pulse of global markets, where we deliver innovative software and service solutions for essential financial reporting and capital markets transactions. At DFIN, we are a values-driven organization that empowers you to build a fulfilling career while bringing your authentic self to work every day. Our "Win as One" mentality ensures that our team's success is directly linked to Client, Shareholder and Employee Satisfaction. Recognized by Newsweek as one of AMERICA'S MOST
Posted 11 days ago | Updated 5 hours ago

Solution Architect Customer Support Team

StackNexus Inc.

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Remote

Contract

Extensive experience in software architecture design and cloud platforms, with a focus on designing scalable, high-performance, and resilient systems. Deep understanding of software development methodologies, frameworks, and patterns, including microservices, service-oriented architecture (SOA), and event-driven architecture. Knowledge of programming & scripting languages such as Python, bash, C# or similar, so as to be able to do quick prototypes Strong knowledge of cloud platforms & services (
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Posted 13 days ago

Electrical & Controls Engineer

McKesson Corporation

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Remote or Longmont, Colorado, USA

Full-time

McKesson is an impact-driven, Fortune 10 company that touches virtually every aspect of healthcare. We are known for delivering insights, products, and services that make quality care more accessible and affordable. Here, we focus on the health, happiness, and well-being of you and those we serve - we care. What you do at McKesson matters. We foster a culture where you can grow, make an impact, and are empowered to bring new ideas. Together, we thrive as we shape the future of health for patien
Posted 17 days ago | Updated 5 hours ago

Lead Engineer (Node.js/Angular/React)

Resourcesoft, Inc.

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Remote

Contract

Requirements: 7 or more years of experience in Node.js development. Proficiency in Angular, React, and TypeScript for front-end development. Experience with AWS cloud services for application deployment. Experience with Docker and Kubernetes for containerization and orchestration. Experience with GraphQL and Express web server. Experience with SQL Server connectivity and database design. Excellent written and verbal communication skills. Responsibilities Design, develop, and maintain scalable a
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Posted moments ago | Updated moments ago

(USA) Senior, Software Engineer

Walmart Inc.

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Remote or Denver, Colorado, USA

Full-time

Position Summary Are you a seasoned software engineer looking to make a significant impact? Join Walmart/VIZIO as a Senior Software Engineer in our Content Services team. This is a unique opportunity to work on cutting-edge technology, shape our software solutions, and help drive the future of our digital content. What you'll do About the Team: The Content Services team at Walmart/VIZIO is dedicated to delivering top-tier digital content experiences. We operate with a focus on innovation and s
Posted 17 days ago | Updated 5 hours ago

Client Support Analyst/ Trading/ Fintech

Motion Recruitment Partners, LLC

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Chicago, Illinois, USA

Full-time

Exciting job opportunity for a Senior Client Support Analyst to join a service-centric Client Support team at a Trading Firm in downtown Chicago. This full-time position offers the opportunity to work with a financial technology company that specializes in low-latency proprietary trading platforms serving large institutional clients. The role operates in a hybrid environment requiring a minimum of 3+ days in the office per week at their state-of-the-art downtown Chicago facility. This is an exce
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Posted 14 days ago | Updated 2 hours ago

Application Development Advisors- Hybrid

Cigna

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Remote or Plano, Texas, USA

Full-time

The job profile for this position is Application Development Advisor, which is a Band 4 Senior Contributor Career Track Role with Cigna-Evernorth Services Inc. Responsibilities- Develop software applications to support payment integrity programs, produce accurate claim payments, and reduce medical cost expenditures.Contribute to software development, strategy, and product roadmap.Use system development life cycle methodologies.Assist with the re-writing of end-to-end (E2E) vendor programs and t
Posted 34 days ago | Updated 5 hours ago

Dotnet Developer

Randstad - Torc

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Remote

Contract

We are looking for a highly skilled Full Stack .NET Developer for a full-time contract. This is a 100% remote role with flexibility to collaborate across Central Time (CT) hours. What You ll Do Design, develop, and optimize web applications using .NET (C#) for the backend and modern frontend technologies.Collaborate with product managers, designers, and other engineers to build scalable, efficient solutions.Implement best practices in software architecture, automated testing, and performance opt
Posted 60+ days ago | Updated 1 hour ago

Lead Software Developer (.NET)

Zachary Piper Solutions, LLC

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Remote

Full-time

Piper Companies is seeking a Lead Software Developer (.NET) to join a leading shipping and logistics organization. The Lead Software Developer (.NET) will oversee and enhance intricate customer deployments of a specialized SaaS platform. Responsibilities of the Lead Software Developer (.NET) include: Take part in planning and gathering requirements for technical projects, including designing, coding, testing, and troubleshooting applications. Build applications and services using our main techn
Posted 54 days ago | Updated 29 days ago

Full Stack Developer in 100% Remote

Apidel Technologies

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Remote

Contract

Job Title: Developer Location: 100% Remote Duration: 12+ Months [Possible Extension or Conversion] Shift: Monday-Friday [8:00 am to 5:00pm] Varies Pay Range: $50 to $61.28/Hr. on W2 MANAGER'S NOTES: MUST HAVE 5-10 YEARS EXPERIENCE WITH BELOW TOOLS C#.Net.Net CoreJavascript with focus in vue.jsSQL Server databaseWilling to do both front end and back end development (full stack) They must be able to work in a team environment with 5-7 other team members
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Posted moments ago

Engineer - Risk Analytics

Balyasny Asset Management

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Chicago, Illinois, USA

Full-time

Description Summary The Risk Technology team is looking for an exceptional senior engineer to help build out critical risk analytics infrastructure used across the firm. Involvement will be across the entire architecture with a focus on scalability, throughput as well as enabling risk managers new capabilities to access and research risk analytics. The successful candidate will be familiar with complex systems processing large volumes of data to tight performance requirements and have experien
Posted 60+ days ago | Updated 5 hours ago

Field Applications Engineer (Semiconductor)

Thermo Fisher Scientific

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Idaho, USA

Full-time

Work Schedule Standard (Mon-Fri) Environmental Conditions Cleanroom: no hair products, jewelry, makeup, nail polish, perfume, exposed piercings, facial hair etc allowed Job Description Job Title: Field Apps Engineer, Semiconductor The Semiconductor Business Unit provides solutions in pathfinding, yield learning, and failure analysis of semiconductor processes and manufacturing. Our broad range of high-performance microscopy workflows provides critical data at the micro-, nano-, and picomete
Posted 21 days ago | Updated 5 hours ago

Full Stack \

ConsultNet, LLC

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Remote or Birmingham, Alabama, USA

Full-time

Full Stack "Data " Engineer Remote (EST or CST) 8 month contract Pay Rate: $50.00 to $52.00 per hr. We're looking for a hands-on Full Stack "Data " Engineer with experience on Palantir to support a major migration from a legacy system to a modern enterprise data platform. This role is part of an ongoing transformation project that began in early 2025. You'll help accelerate development by contributing to backend services and high-performance data pipelines in a collaborative Agile environment.
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Posted 55 days ago | Updated 5 hours ago

Lead Software Engineer - Data and AI - Lakeland

Publix

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Remote or Lakeland, Florida, USA

Full-time

Publix Super Markets, Inc. is the largest privately-owned food retailer in the nation with more than 1,200 stores and more than 200,000 associates throughout the Southeast. We are associate-owned, proud of our family atmosphere, and consistently named as one of the best companies to work for in America. We are largely debt-free and renowned for our financial performance as well as our premier customer service. Publix?s Information Services (I/S) department is located in Lakeland, Florida and Alp
Posted 4 days ago | Updated 2 hours ago

Senior Services Engineer

GE Vernova

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Bellevue, Washington, USA

Full-time

Job Description Summary Job Description Essential Functions / Responsibilities: Work closely with customers to understand and define requirements, develop technical proposals, and set expectations for software implementations, upgrades and or interface projects. Contribute to software implementation, troubleshooting, customization, and integration into customer systems while balancing scope versus project time and resource commitments. Collaborate with the customer to identify technical requi
Posted 20 days ago | Updated 5 hours ago

Application Architect

Centene Corporation

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Georgia, USA

Full-time

You could be the one who changes everything for our 28 million members by using technology to improve health outcomes around the world. As a diversified, national organization, Centene's technology professionals have access to competitive benefits including a fresh perspective on workplace flexibility. Position Purpose: Designs, developments, and deployments of the enterprise architectural software systems. Defines system solutions based on user/client needs, cost, and required integration with
Posted 60+ days ago | Updated 5 hours ago