Senior .NET / React Developer

Senior .NET / React Developer | Lisle, IL | Hybrid OnsiteI’m hiring multiple Senior .NET / React Developers for a major enterprise application modernization initiative in Lisle, IL.This is a strong opportunity for a senior full-stack developer who enjoys doing more than maintaining existing applications. You’ll help modernize legacy ASP.NET applications into .NET Core + React, build APIs, improve application architecture, and support mission-critical systems.Important: This position requires working onsite in Lisle 4 days per week. Please apply only if that schedule works for you.What I’m looking for5+ years of hands-on C# / ASP.NET / .NET Core development3+ years of ReactJSStrong experience developing Web APIs in .NET CoreExperience modernizing legacy ASP.NET/Web Forms applications to .NET Core + ReactAdvanced SQL, including complex queries and stored proceduresStrong JavaScript, HTML, CSS, JSON and REST/SOAP experienceUnit testing and API testingStrong understanding of OOP, SOLID principles, design patterns and code refactoringGit/GitFlow and Agile development experienceExperience with CI/CD and modern DevOps practicesExperience with Azure, Kubernetes, containerization, infrastructure-as-code and Telerik is a plus.I'm particularly interested in developers who can work independently, collaborate well with an established engineering team, and understand how to modernize applications without compromising the stability of critical production systems.Multiple positions are available.If you're a strong .NET/React developer in the Chicagoland area and Lisle 4 days onsite works for you, I’d like to hear from you.Please apply or send me your resume directly.#DotNet #CSharp #ReactJS #FullStackDeveloper #SoftwareEngineer #ChicagoTech #LisleIL #DotNetDeveloper #ReactDeveloper #SoftwareJobsLorie GirondaSenior Recruiting Lead | TalentFish✉️ lgironda@talentfish.com🌐 talentfish.com | 🔗 linkedin.com/in/loriegirondaStay ahead of the market — follow my weekly newsletter for new job opportunities, hiring trends, and insights from 20+ years in staffing: 👉 LGirondaJobs on LinkedIn