Arthur J. Gallagher & Co. Software Engineer Interview Questions + Guide in 2025

Arthur J. Gallagher & Co. is a global leader in insurance, risk management, and consulting services, dedicated to helping businesses grow and communities thrive through a culture defined by core values and ethical practices.

As a Software Engineer at Gallagher, you will be an integral part of a product-focused development team responsible for building enterprise-level software applications across various platforms. This full-stack role requires you to prepare, design, code, test, debug, and maintain complex computer programs, while also developing and consuming APIs to synchronize data with other applications. You will work under general direction to define system scope and objectives, devise procedures to solve sophisticated problems, and refine business requirements into actionable programs. It’s crucial to have strong relational database experience, particularly with Microsoft SQL Server, and proficiency in C# and .NET Core development.

Your ability to communicate effectively with both technical and non-technical audiences is essential for fostering user relationships and addressing inquiries that arise during day-to-day operations. A self-starter attitude, coupled with a strong work ethic and the ability to thrive in a fast-paced environment, will set you apart as an ideal candidate. Experience with Agile methodologies, OutSystems, and the Microsoft Power Platform will be advantageous.

This guide will provide insights into the specific skills and attributes that Gallagher values in a Software Engineer, helping you prepare effectively for the interview process and stand out as a candidate.

The interview process for a Software Engineer at Arthur J. Gallagher & Co. is structured to assess both technical skills and cultural fit within the organization. It typically consists of several stages, each designed to evaluate different aspects of a candidate's qualifications and compatibility with the company.

1. Initial Screening

The process begins with an initial screening, which is often conducted via a phone call with a recruiter. This conversation focuses on your background, experience, and motivation for applying to Gallagher. The recruiter will also provide insights into the company culture and the specifics of the Software Engineer role, ensuring that candidates have a clear understanding of what to expect.

2. Technical Assessment

Following the initial screening, candidates may be required to complete a technical assessment. This assessment typically includes a series of aptitude questions covering basic reasoning, mathematics, SQL, and object-oriented programming concepts. The goal is to evaluate your foundational knowledge and problem-solving abilities. There are no negative marks for incorrect answers, allowing candidates to demonstrate their skills without the pressure of penalties.

3. In-Person Interviews

Candidates who successfully pass the technical assessment will move on to in-person interviews. This stage usually consists of multiple rounds, often involving interviews with various team members, including hiring managers and senior developers. During these interviews, candidates can expect to discuss their previous projects, technical experiences, and how they approach problem-solving. Behavioral questions are common, and candidates should be prepared to articulate their experiences using the STAR (Situation, Task, Action, Result) format.

4. Panel Interview

In some cases, candidates may participate in a panel interview, where they will meet with several interviewers simultaneously. This format allows the interviewers to assess how well candidates communicate and collaborate in a group setting. Questions may cover technical skills, teamwork, and how candidates handle challenges in a software development environment.

5. Final Interview

The final stage of the interview process may involve a conversation with higher-level management or executives. This interview often focuses on cultural fit and the candidate's long-term career aspirations within Gallagher. Candidates may be asked to articulate why they believe they are an ideal fit for the company and how they can contribute to its goals.

As you prepare for your interviews, consider the types of questions that may arise in each of these stages, particularly those that relate to your technical expertise and past experiences.

Here are some tips to help you excel in your interview.

Prepare for the Aptitude Test

The interview process at Gallagher includes an aptitude test that covers basic reasoning, mathematics, SQL, and object-oriented programming concepts. Make sure to practice these areas thoroughly, as there are 40 questions with no negative marking. Familiarize yourself with common SQL queries and object-oriented principles, as these will be crucial for demonstrating your foundational knowledge.

Emphasize Your Technical Skills

As a Software Engineer, you will need to showcase your proficiency in C#, .NET Core, and web/API development. Be prepared to discuss your experience with Angular or React, as well as your familiarity with relational databases like Microsoft SQL Server. Highlight specific projects where you utilized these technologies, and be ready to explain your role in those projects in detail.

Be Ready for Behavioral Questions

Gallagher values interpersonal skills and cultural fit, so expect behavioral questions that assess your teamwork and problem-solving abilities. Use the STAR (Situation, Task, Action, Result) method to structure your responses. Prepare examples that demonstrate your ability to work collaboratively, manage conflicts, and lead projects independently.

Show Your Passion for the Role

During the interview, express your enthusiasm for the Software Engineer position and the opportunity to contribute to Gallagher's mission. Be prepared to articulate why you are interested in working for Gallagher specifically, and how your values align with "The Gallagher Way." This will help you stand out as a candidate who is not only technically qualified but also culturally aligned with the company.

Engage with Your Interviewers

The interview process at Gallagher is described as conversational and friendly. Take this opportunity to engage with your interviewers by asking insightful questions about the team dynamics, project methodologies, and the company's future direction. This not only shows your interest but also helps you assess if Gallagher is the right fit for you.

Follow Up Professionally

After your interviews, send a thank-you email to express your appreciation for the opportunity to interview. Reiterate your interest in the position and briefly mention a key point from your conversation that resonated with you. This will leave a positive impression and keep you top of mind as they make their decision.

By following these tips, you can approach your interview with confidence and demonstrate that you are not only a skilled Software Engineer but also a great fit for Gallagher's culture and values. Good luck!

In this section, we’ll review the various interview questions that might be asked during a Software Engineer interview at Arthur J. Gallagher & Co. The interview process will likely assess both technical skills and cultural fit, so it's essential to prepare for a range of questions that cover your technical expertise, problem-solving abilities, and interpersonal skills.

Technical Skills

1. Can you explain the difference between an abstract class and an interface in C#?

Understanding object-oriented programming concepts is crucial for this role, and this question tests your knowledge of C# specifically.

How to Answer

Discuss the key differences, such as how an abstract class can provide default behavior while an interface cannot. Mention the use cases for each.

Example

“An abstract class can contain both abstract methods and concrete methods, allowing for shared code among derived classes. In contrast, an interface only defines method signatures without any implementation. I would use an abstract class when I want to provide a common base with shared functionality, while an interface is ideal for defining a contract that multiple classes can implement.”

2. Describe your experience with ASP.NET and how you have used it in your projects.

This question assesses your practical experience with web development technologies.

How to Answer

Provide specific examples of projects where you utilized ASP.NET, focusing on the features you implemented and the challenges you faced.

Example

“In my last project, I developed a web application using ASP.NET Core, where I implemented RESTful APIs for data retrieval. I faced challenges with authentication and authorization, which I resolved by integrating IdentityServer for secure token management.”

3. How do you approach debugging a complex application?

Debugging is a critical skill for a software engineer, and this question evaluates your problem-solving process.

How to Answer

Outline your systematic approach to debugging, including tools and techniques you use.

Example

“I start by reproducing the issue to understand its context. Then, I use debugging tools like Visual Studio’s debugger to step through the code. I also check logs for any anomalies and isolate the problem by commenting out sections of code until I identify the root cause.”

4. What is your experience with API development and consumption?

This question gauges your familiarity with APIs, which are essential for modern software applications.

How to Answer

Discuss your experience in both creating and using APIs, including any specific technologies or frameworks.

Example

“I have developed several RESTful APIs using ASP.NET Web API, focusing on creating endpoints for CRUD operations. I also consumed third-party APIs, ensuring proper error handling and data validation to maintain application integrity.”

5. Can you explain what LINQ is and provide an example of how you have used it?

LINQ is a powerful feature in C# that simplifies data manipulation, and this question tests your knowledge of it.

How to Answer

Define LINQ and describe its benefits, then provide a specific example from your experience.

Example

“LINQ, or Language Integrated Query, allows for querying collections in a more readable way. I used LINQ in a project to filter and sort a list of customer records based on specific criteria, which significantly reduced the amount of code I had to write compared to traditional loops.”

Behavioral Questions

1. Describe a challenging project you worked on and how you overcame the obstacles.

This question assesses your problem-solving skills and resilience.

How to Answer

Use the STAR method (Situation, Task, Action, Result) to structure your response.

Example

“In a recent project, we faced a tight deadline due to unexpected changes in requirements (Situation). My task was to ensure we delivered a functional product on time (Task). I organized daily stand-ups to track progress and reallocated resources to critical areas (Action). As a result, we delivered the project on time, and the client was very satisfied with the outcome (Result).”

2. How do you prioritize tasks when working on multiple projects?

This question evaluates your time management and organizational skills.

How to Answer

Discuss your approach to prioritization, including any tools or methods you use.

Example

“I prioritize tasks based on urgency and impact. I use tools like Trello to visualize my workload and set deadlines. I also communicate with my team to ensure alignment on priorities, which helps in managing expectations and delivering on time.”

3. How do you handle feedback and criticism?

This question assesses your ability to accept and learn from feedback.

How to Answer

Explain your perspective on feedback and provide an example of how you’ve used it to improve.

Example

“I view feedback as an opportunity for growth. For instance, after receiving constructive criticism on my code quality during a code review, I took the initiative to learn more about best practices and refactored my code accordingly. This not only improved my skills but also enhanced the overall quality of our project.”

4. Can you give an example of how you worked effectively within a team?

Collaboration is key in software development, and this question evaluates your teamwork skills.

How to Answer

Share a specific instance where you contributed to a team effort, highlighting your role and the outcome.

Example

“In a recent project, I collaborated with designers and product managers to develop a new feature. I facilitated communication between the technical and non-technical team members, ensuring everyone was aligned on the project goals. This collaboration led to a successful launch that exceeded user expectations.”

5. What motivates you to work in software development?

This question helps the interviewer understand your passion and commitment to the field.

How to Answer

Share your motivations and what aspects of software development you find most fulfilling.

Example

“I am motivated by the challenge of solving complex problems and the satisfaction of creating software that improves users' lives. I enjoy the continuous learning aspect of technology, as it keeps me engaged and excited about my work.”