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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Application Developer - Back End - **Company:** Gallagher Llp - **Location:** Rolling Meadows, IL, United States - **Experience:** Expert - **Salary:** $89,500.0 - $174,500.0 - **Contract:** Permanent contract - **Skills:** ASP.NET, .NET Framework, Microsoft Windows, Application Services, Unit Testing, Microsoft Azure, C Sharp (Programming Language), Code Review, Computer Engineering, Database Design, Database Queries, Software Design Patterns, Web Development, Microsoft SQL Server, OAuth, Object-Oriented Software Development, Performance Tuning, Query Optimization, Oop Languages, Software Engineering, SONAR (Symantec), SQL Stored Procedures, Systems Integration, Transact-SQL, Virtual Studio, Web Services, .NET Core, User Controls, Software Security, Git, AngularJS, Information Technology, Asp.net Web Forms, Restful APIs, Software Version Control, Serverless Computing, Web Api - **Published:** June 12, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=bbc29a0af19b58ce ## About the Role Do you have experience in Windows?, Do you have a Master's degree?, Required Minimum Position Qualifications: Master's degree in Computer and Information Technology, Computer Engineering, Computer Science, and Digital Sciences, or related field of study and 2 years of work experience in the job offered or any related occupation in which the required experience was gained. Alternate Qualifications: Bachelor's degree in Computer and Information Technology, Computer Engineering, Computer Science, and Digital Sciences, or related field of study and 5 years of work experience in the job offered or any related occupation in which the required experience was gained. Position also requires demonstrated experience in the following: * Azure technologies, including Azure App Services, Azure Functions, and Azure DevOps. * T-SQL experience (MS SQL Server). * SSL certificates. * OAuth token Security * SQL Server, including database design, query optimization, and performance tuning * OOP concepts and design patterns * ASP.NET * .NET, C#, ASP.NET, .NET CORE, Windows OS, Code Security tools including Sonar Qube. * Developing and Integrating Web APIs. * Angular framework for building web applications. * Certifications: * + Microsoft Certified: Azure Developer Associate + Microsoft Certified: Azure Fundamentals ## Description Welcome to Gallagher - a global community of people who bring bold ideas, deep expertise, and a shared commitment to doing what's right. We help clients navigate complexity with confidence by empowering businesses, communities, and individuals to thrive. At Gallagher, you'll find more than a job; you'll find a culture built on trust, driven by collaboration, and sustained by the belief that we're better together. Whether you join us in a client-facing role or as part of our brokerage division, our benefits and HR consulting division, or our corporate team, you'll have the opportunity to grow your career, make an impact, and be part of something bigger. Experience a workplace where you're encouraged to be yourself, supported to succeed, and inspired to keep learning. That's what it means to live The Gallagher Way. How you'll make an impact * Design, develop, and maintain RESTful APIs using C#, .NET framework, and .NET Core. * Utilize Azure technologies for cloud-based application development and deployment. * Develop and optimize SQL Server databases, including writing complex queries and stored procedures. * Apply OOP principles to design and implement scalable and maintainable software solutions. * Implement front-end components using Angular to create responsive and user-friendly interfaces. * Gather requirements, design solutions, and ensure successful project delivery. * Create Web Services in C#.Net * Develop reusable and extensible classes, namespaces, and event handler functions in all ASP.net web forms by breaking down the application functionality. * Create the User controls to achieve the reusability of controls throughout the application. * Pioneer migrations of ancient JS applications to modern Angular and close security issues. * Manage source code using Git Repo/VSTS and follow best practices for version control. * Conduct code reviews and write unit test cases to ensure adherence to coding standards and best practices and provide constructive feedback. * Troubleshoot and resolve technical issues, ensuring high performance and reliability of applications. ## Related Videos - [Develop enterprise-ready applications for Microsoft Teams with Azure resources on modern web technologies](https://www.wearedevelopers.com/videos/187-develop-enterprise-ready-applications-for-microsoft-teams-with-azure-resources-on-modern-web-technologies) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Web APIs you might not know about](https://www.wearedevelopers.com/videos/281-web-apis-you-might-not-know-about) - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [Hacking MSSQL on Cloud. All of them. How I became sysadmin on Azure, AWS, GCP and Alibaba.](https://www.wearedevelopers.com/videos/100339-hacking-mssql-on-cloud-all-of-them-how-i-became-sysadmin-on-azure-aws-gcp-and-alibaba) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) ## Related Articles - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries)