Marsh Software Engineer interview questions & guide 2026

The following questions are compiled from real interview experiences at Marsh across various global offices. These questions are representative of what you can expect and are grouped by key technical and behavioral categories to help you identify patterns in how Marsh evaluates talent.

Core CS Fundamentals & Databases

These questions evaluate your understanding of foundational computer science concepts, database design, and query optimization, which are critical for maintaining the high-performance systems at Marsh.

• Explain the four pillars of Object-Oriented Programming (OOPs) and provide real-world examples of how you have applied them.
• What is the difference between an inner join, left join, and outer join in SQL? Write a query to find duplicate records in a table.

To succeed in the Marsh interview process, you must approach your preparation with a balanced focus on core engineering principles, practical system design, and behavioral alignment. Marsh values engineers who are not only technically proficient but also possess the communication skills necessary to collaborate across global, cross-functional teams.

Technical Fundamentals & Core CS – You must have a rock-solid grasp of foundational computer science. Do not skip the basics of OOPs, SQL, Operating Systems, and Computer Networks. Interviewers frequently test these core concepts, especially for entry-level and mid-level roles, to ensure you have a strong engineering foundation.

Problem-Solving & Coding – Practice writing clean, readable code. Focus on string manipulation, array operations, and fundamental data structures. You are not expected to solve ultra-complex competitive programming puzzles, but you must be able to explain your thought process and write bug-free code for standard algorithms.

Architectural & System Design – For mid-to-senior roles, you will be evaluated on your ability to design scalable, secure, and resilient systems. Be prepared to discuss cloud migration, microservices architecture, API design, and how to handle data consistency across distributed systems.

Behavioral & Project Deep-Dives – Your resume is a major focal point of the discussions. Be ready to articulate the business impact of your past projects, the technical choices you made, and how you navigated challenges. Practice structuring your behavioral answers using the STAR method (Situation, Task, Action, Result).

The interview process for a Software Engineer at Marsh is designed to evaluate both your technical depth and your cultural fit. While the process is structured, candidates often report that the exact flow can vary slightly depending on the seniority of the role, the specific office location, and whether you applied through campus placement or an experienced-hire pipeline.

Typically, the process spans 3 to 4 rounds and takes anywhere from 2 to 4 weeks to complete, though candidates should be prepared for potential administrative delays during the final onboarding stages. The initial stage usually begins with an online assessment or an automated video screening, followed by deep technical discussions, architectural evaluations (for senior roles), and a final managerial and behavioral round.

The overall philosophy of the Marsh interview process is conversational yet thorough. Interviewers want to understand how you think, how you approach ambiguity, and how you collaborate with others. They appreciate candidates who are confident, structured in their communication, and genuinely interested in solving the complex risk-management problems that the company faces daily.

The timeline above illustrates the standard progression a candidate goes through from the initial application to the final offer. Most candidates will begin with an online assessment focusing on aptitude and core CS concepts before moving on to live technical interviews. Keep in mind that for senior or specialized roles, the system architecture and managerial rounds will carry significantly more weight.

Data Structures, Algorithms & Coding

This evaluation area focuses on your ability to translate logical solutions into clean, efficient, and maintainable code. Marsh interviewers look for structured thinking, clean code syntax, and an awareness of time and space complexity.

Be ready to go over:

• Array and String Manipulation – Basic operations, searching, sorting, and pattern matching.
• Recursion and Backtracking – Solving classic problems like palindromes, fibonacci, or subset generation.
• Basic Data Structures – Practical implementation and usage of Stacks, Queues, Linked Lists, and Hash Maps.
• Advanced concepts (less common) – Dynamic programming, graph traversals (BFS/DFS), and complex tree manipulations.

Example questions or scenarios:

• Write a program to reverse an array in-place without using extra memory.
• Implement an algorithm to find the first non-repeating character in a string.
• Explain how you would implement a custom stack that supports push, pop, and retrieving the minimum element in constant time.

Core CS Fundamentals (OOPs, DBMS, SQL, Networks)

For almost all software engineering roles at Marsh, a significant portion of the technical evaluation is dedicated to core computer science fundamentals. This ensures that candidates can work effectively across different parts of the enterprise technology stack.

Be ready to go over:

• Object-Oriented Programming (OOPs) – Inheritance, polymorphism, encapsulation, abstraction, and design patterns.
• Database Management Systems (DBMS) – SQL queries, indexing, joins, transactions, and ACID properties.
• Operating Systems & Networking – Process synchronization, memory management, TCP/IP stack, and DNS.

Example questions or scenarios:

• Explain the difference between an abstract class and an interface, and when you would use each.
• Write a SQL query using a subquery or a join to find the second-highest salary from an Employee table.
• What happens under the hood when you type a URL into your browser and press enter?

System Architecture & Cloud Engineering

For experienced roles, such as Cloud Automation, FinOps, or Senior Software Engineer, you will face a dedicated round with architects and engineering managers to evaluate your system design capabilities.

Be ready to go over:

• Microservices Design – Service discovery, API gateways, load balancing, and fault tolerance.
• Cloud Administration & Automation – Infrastructure as Code (IaC), CI/CD pipelines, and public cloud services (AWS/Azure).
• FinOps and Cloud Cost Optimization – Monitoring cloud spend, resource allocation, and automation of cloud resources.
• Advanced concepts (less common) – Event-driven architectures, message queues (Kafka/RabbitMQ), and multi-region failover strategies.

Example questions or scenarios:

• Design a scalable API gateway that handles rate limiting and authentication for multiple microservices.
• How would you automate the provisioning and decommissioning of cloud environments to optimize costs?
• Describe how you would migrate a legacy monolithic application to a modern cloud-native architecture.

Behavioral & Managerial Competencies

The final stages of the interview process assess your soft skills, leadership capabilities, and how well you align with the collaborative, professional environment of Marsh McLennan.

Be ready to go over:

• Conflict Resolution – Navigating disagreements within engineering teams or with product stakeholders.
• Project Ownership – Taking responsibility for a deliverable from design to deployment and post-production support.
• Adaptability – Learning new technologies quickly and adapting to changing business requirements.

Example questions or scenarios:

• Tell me about a time you had to deliver a project with incomplete requirements. How did you proceed?
• Describe a situation where you proposed a technical solution that was initially rejected by your team. How did you handle it?

As a Software Engineer at Marsh, your daily responsibilities will revolve around building, optimizing, and supporting the applications that drive the business forward. You will work within an agile development team, contributing to daily standups, sprint planning, and code reviews to ensure high-quality software delivery.

Your primary technical focus will be on writing clean, secure, and well-tested code. You will be responsible for developing backend services, creating intuitive user interfaces, managing database schemas, and writing automated tests. Additionally, you will play an active role in modernizing the company's application portfolio, which includes migrating legacy systems to cloud environments and implementing robust CI/CD pipelines.

Collaboration is a cornerstone of the role. You will work closely with product owners to understand business requirements, security teams to ensure compliance with strict financial industry standards, and operations teams to monitor and maintain system health in production. Whether you are automating cloud infrastructure, optimizing SQL queries, or developing responsive web applications, your work directly contributes to the digital transformation of Marsh McLennan.

To be competitive for a Software Engineer position at Marsh, you must demonstrate a strong mix of technical expertise, academic foundation, and professional soft skills. The requirements vary depending on seniority, but the core expectations remain consistent.

• Technical Skills (Must-Have):

  • Proficiency in at least one major programming language such as Java, C#, Python, or JavaScript.
  • Solid understanding of relational databases (SQL Server, Oracle, or PostgreSQL) and database design.
  • Familiarity with modern web frameworks (such as Spring Boot, React, Angular, or ExtJS depending on team alignment).
  • Understanding of core software development methodologies, version control (Git), and testing frameworks.

• Technical Skills (Nice-to-Have):

  • Experience with public cloud platforms (AWS, Azure, or GCP) and cloud automation tools.
  • Knowledge of containerization (Docker, Kubernetes) and modern DevOps CI/CD tools.
  • Familiarity with FinOps practices and cloud cost optimization strategies.

• Experience & Soft Skills:

  • A Bachelor’s degree in Computer Science, Information Technology, or a related field (or equivalent practical experience).
  • Strong analytical and problem-solving abilities with high attention to detail.
  • Excellent verbal and written communication skills, with the ability to explain technical concepts to non-technical stakeholders.
  • A collaborative mindset and the ability to work effectively in a global, distributed team environment.

Q: How difficult is the Software Engineer interview at Marsh? A: The difficulty is generally rated as average to moderate. While campus and entry-level interviews focus heavily on core CS fundamentals, coding basics, and aptitude, experienced roles require a deeper dive into architecture, cloud engineering, and framework-specific expertise.

Q: What is the typical timeline from the first interview to an offer? A: The active interview stages usually take about 2 to 4 weeks. However, candidates should be aware that the final background check, HR approvals, and onboarding process can take an additional 1 to 2 months, particularly for roles in India and North America.

Q: Does Marsh offer hybrid or remote working options for engineers? A: Yes, Marsh generally supports a hybrid working model, allowing engineers to balance working from home with collaborating in local offices. The exact split depends on the specific team, manager, and geographic location.

Q: What technologies are most commonly used within the engineering teams? A: The tech stack is diverse, but there is a heavy emphasis on Java (Spring Boot), C# (.NET), JavaScript/TypeScript (React, ExtJS), and cloud-native services deployed on AWS and Azure. Databases are predominantly SQL-based, alongside modern NoSQL solutions.

• Master Your Resume: Be prepared to explain every single project, technology, and bullet point on your resume. Marsh interviewers frequently use your resume as the primary roadmap for technical and situational questions.
• Understand the Business Domain: While you are applying for a technical role, showing an understanding of risk management, insurance brokering, or general financial services will set you apart from other candidates.
• Communicate Your Thought Process: During coding and system design rounds, do not jump straight to writing code. Talk through your approach, discuss trade-offs, and clarify assumptions with your interviewer first.
• Be Patient but Proactive: The hiring process can sometimes feel slow due to the size and compliance requirements of Marsh McLennan. Keep in touch with your recruiter, but expect some latency between rounds.

Preparing for a Software Engineer interview at Marsh requires a structured, comprehensive approach. By focusing on core computer science fundamentals, practicing practical coding challenges, and preparing detailed walkthroughs of your past projects, you can walk into your interviews with confidence. Marsh offers a unique environment where you can solve complex, large-scale technical challenges while contributing to a globally respected brand in risk management and financial services.

To maximize your chances of success, treat every stage of the process—from the initial online aptitude test to the final managerial conversation—with equal importance. Focus on clear, professional communication, and demonstrate your ability to collaborate across diverse, global teams. With the right preparation, you can successfully navigate the process and land a rewarding engineering role at Marsh.

The salary data above provides an overview of the competitive compensation packages offered to software engineers at the company. When negotiating your offer, keep in mind that total compensation often includes a base salary, performance-based bonuses, and a comprehensive benefits package typical of a leading global financial services firm. For more detailed insights, community discussions, and real-time interview feedback from other candidates, explore the resources available on Dataford.