Arthur J. Gallagher & Co.

Global insurance brokerage, risk management, consulting

Senior Application Developer

Backend EngineeringConfirmed live in the last 24 hours

Full-timeRolling Meadows, IL, USANo salary listedIn-person

About the Job

Requirements

A university degree and at least five years of prior relevant experience, or equivalent experience.
Strong experience designing, developing, and maintaining REST APIs using C#, the .NET Framework, .NET Core, or another object-oriented programming language.
Experience using Azure technologies for cloud-based application development and deployment, including Azure Data Factory, Azure Functions, Azure SQL, Static Web Apps, Azure Container Apps, and related services.
Ability to develop and optimize SQL Server databases, write complex queries and stored procedures, and perform database performance tuning.
Experience with AI-assisted development, custom agents, and workflow automation to accelerate software delivery.
Ability to apply object-oriented programming principles to design and implement scalable, maintainable software solutions.
Ability to manage source code using Git repositories, Azure DevOps, or VSTS while following version-control best practices.
Ability to troubleshoot and resolve technical issues to maintain application performance, reliability, and stability.
Problem-solving and critical-thinking skills.

Responsibilities

Design, develop, and maintain REST APIs.
Develop and deploy cloud-based applications using Azure technologies.
Develop and optimize SQL Server databases, including complex queries, stored procedures, and performance tuning.
Apply object-oriented programming principles to design and implement scalable, maintainable software solutions.
Lead and mentor junior developers by providing guidance, support, and technical expertise.
Manage source code with version-control tools and practices.
Troubleshoot and resolve technical issues to ensure application performance, reliability, and stability.
Stay current with emerging technologies and industry trends to improve development processes and practices.

Desired Qualifications

Exposure to front-end technologies such as Angular or React.
Familiarity with CI/CD pipelines and deployment automation.
Exposure to designing complex systems and scalable application architectures.
App development or programming experience.
Database design experience.
System architecture and integration experience.
Communication and stakeholder management skills.
Root cause analysis experience.
Product development management experience.
Product portfolio management experience.

Introduction

At Gallagher Bassett, we're there when it matters most because helping people through challenging moments is more than just our job, it’s our purpose. Every day, we help clients navigate complexity, support recovery, and deliver outcomes that make a real difference in people’s lives. It takes empathy, precision, and a strong sense of partnership—and that’s exactly what you’ll find here. We’re a team of fast-paced fixers, empathetic experts, and outcomes drivers — people who care deeply about doing the right thing and doing it well. Whether you're managing claims, supporting clients, or improving processes, you’ll play a vital role in helping businesses and individuals move forward with confidence. Here, you’ll be supported by a culture that values teamwork, encourages curiosity, and celebrates the impact of your work. Because when you’re here, you’re part of something bigger. You’re part of a team that shows up, stands together, and leads with purpose.

How you'll make an impact

Key Skills:

Strong experience designing, developing, and maintaining REST APIs using C#, the .NET Framework, .NET Core, or other object-oriented programming languages.
Utilize Azure technologies for cloud-based application development and deployment, including Azure Data Factory, Azure Functions, Azure SQL, Static Web Apps, Azure Container Apps, and related services.
Develop and optimize SQL Server databases, including writing complex queries, stored procedures, and performing database performance tuning.
Experience with AI-assisted development, custom agents, and workflow automation to accelerate software delivery.
Apply strong object-oriented programming principles to design and implement scalable, maintainable software solutions.
Lead and mentor junior developers by providing guidance, support, and technical expertise.
Manage source code using Git repositories, Azure DevOps, or VSTS while following version-control best practices.
Troubleshoot and resolve technical issues to ensure high performance, reliability, and stability of applications.
Stay current with emerging technologies and industry trends to continuously improve development processes and practices.
Demonstrate excellent problem-solving skills with the ability to think critically and creatively.
Exposure to front-end technologies such as Angular or React.
Familiarity with CI/CD pipelines and deployment automation.
Exposure to designing complex systems and scalable application architectures.

About You

Required:
• Typically requires a University Degree and minimum 5 years of prior relevant experience, or equivalent experience.

Preferred:
• App development/programming
• Database design
• System architecture & integration
• Communication and stakeholder management skills
• Root cause analysis
• Product development management
• Product portfolio management

Compensation and benefits

At Gallagher, we believe supporting our colleagues goes far beyond the role itself. For more information, visit our Benefits page.

Competitive compensation
Comprehensive benefits programs designed to support your well-being
Career development opportunities and ongoing learning
A collaborative, people-first culture with accessible leadership
The opportunity to do meaningful work with global reach and local impact

At Gallagher, we are dedicated to building an inclusive and authentic workplace. If your past experience doesn’t align perfectly, we encourage you to join our Talent Community to stay connected to additional career opportunities. At times, we will consider transferable skills from previous roles.

Gallagher is an affirmative action/equal opportunity employer (Minorities/Females/Veterans/Disabled)

About the Company

Arthur J. Gallagher & Co.

Global insurance brokerage, risk management, consulting

Arthur J. Gallagher & Co. is a global insurance brokerage and risk management firm. It helps businesses, public entities, and individuals manage risk and obtain insurance through three segments: brokerage, risk management, and corporate. The brokerage unit offers a full range of retail and wholesale insurance brokerage and consulting services to match clients with coverage. The risk management unit handles contract claim settlements, claim administration, loss control consulting, and risk management information services to reduce exposures. The corporate unit oversees the company’s clean energy and other investments. The firm differentiates itself by providing end-to-end risk solutions across insurance placement, claims handling, risk counseling, and investment activities, rather than focusing on a single service. Its goal is to help clients manage risk effectively, protect assets, and pursue value through diverse investments, including clean energy.

Company size: 10,001+
Company stage: IPO
Headquarters: Itasca, IL
Founded: 1927

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