1. What is a Software Engineer at MSD?

MSD (known as Merck & Co. in the U.S. and Canada) is a global healthcare leader with a mission to save and improve lives. As a Software Engineer here, you are not just building generic applications; you are creating the digital infrastructure that accelerates drug discovery, streamlines clinical trials, and optimizes global supply chains. The technology organization at MSD is pivotal in transforming how healthcare solutions are developed and delivered to patients.

In this role, you will work on complex, data-intensive systems that require high reliability and compliance. You might be developing platforms that help scientists analyze genomic data, building patient-facing mobile applications, or modernizing legacy systems to leverage cloud architectures. The work is impactful and tangible—your code contributes directly to the efficiency of getting life-saving medicines to the market.

This position requires a balance of technical excellence and domain curiosity. MSD values engineers who can navigate highly regulated environments (GxP) while pushing for innovation. You will collaborate with cross-functional teams, including data scientists, researchers, and product managers, making communication and a collaborative mindset just as critical as your coding ability.

2. Common Interview Questions

These questions are based on real interview experiences from candidates who interviewed at this company. You can practice answering them interactively on Dataford to better prepare for your interview.

3. Getting Ready for Your Interviews

Preparing for an interview at MSD requires a shift in mindset. Unlike pure tech companies that may focus exclusively on algorithmic puzzles, MSD places significant weight on your ability to apply technology to real-world problems and your alignment with their mission.

Key Evaluation Criteria:

Company & Product Knowledge – This is a critical differentiator at MSD. Interviewers frequently test whether you have done your homework. You must understand what MSD does, be familiar with their flagship products (such as Keytruda or Gardasil), and articulate why you want to work in the pharmaceutical/biotech industry specifically.

System Design & Trade-offs – Particularly for mid-to-senior roles, the ability to discuss system architecture is paramount. You will be evaluated on how you structure applications, select technologies, and—most importantly—how you analyze trade-offs between different approaches. Expect discussions rather than just whiteboard coding.

Communication & Presentation – The Software Engineer role often involves explaining technical concepts to non-technical stakeholders. Some interview processes even include a requirement to present a slide deck about yourself or a technical topic. You are evaluated on clarity, structure, and your ability to engage an audience.

Resume Deep Dive – Expect a forensic examination of your past projects. Interviewers will ask detailed questions about the "why" and "how" of the technologies you listed. You need to demonstrate mastery of the tools you claim to know and be able to discuss challenges you faced in previous roles.

4. Interview Process Overview

The interview process for a Software Engineer at MSD is generally described as positive, conversational, and structured. While the exact steps can vary by location (e.g., some regions hold "walk-in" assessment days while others follow a standard scheduled path), the philosophy remains consistent: MSD wants to know the person behind the code.

Typically, the process begins with an online application, often followed by a preliminary online assessment. This coding test is generally described as accessible (not "Hard" LeetCode) and is used as a basic filter. Following this, you will likely encounter an HR screening call to discuss your background, availability, and interest in the company.

The core of the evaluation happens during the technical rounds, which may be a series of 1-on-1 interviews or a panel format. In these sessions, you will meet with Tech Leads and Senior Developers. The atmosphere is collaborative; interviewers are often described as "great personalities to connect with." Unlike high-stress interrogation styles, MSD interviews often feel like peer-to-peer discussions regarding architecture, code quality, and situational judgment.

The timeline above illustrates a typical flow, though candidates in hubs like Hyderabad or Singapore might experience compressed timelines or assessment centers. Use this visual to pace your preparation; ensure you have your "Tell me about yourself" pitch polished for the early stages and your system design concepts ready for the final panel.

5. Deep Dive into Evaluation Areas

To succeed, you must prepare for a mix of technical competency checks and behavioral assessments. Based on candidate data, the following areas are heavily emphasized.

System Design and Architecture

For many candidates, especially those with some experience, this is the most significant part of the onsite interview. You may not be asked to write raw code on a whiteboard; instead, you will sit down with Tech Leads to architect a solution.

Be ready to go over:

• Trade-off analysis – Why choose SQL over NoSQL for a specific patient data set? Why Microservices vs. Monolithic for a legacy migration?
• Scalability – How does your design handle increased data loads during a global clinical trial?
• Data Integrity – How do you ensure data consistency, which is critical in healthcare?

Example questions or scenarios:

• "Design a system to track pharmaceutical inventory across multiple warehouses."
• "Discuss the trade-offs between two different architectural approaches you have used in the past."
• "How would you modernize a legacy application without disrupting current users?"

Resume and Technical Experience

MSD interviewers rely heavily on your resume as a roadmap for the interview. They want to verify that you truly understand the technologies you have listed.

Be ready to go over:

• Project ownership – Specific contributions you made to the projects listed on your CV.
• Problem resolution – Technical hurdles you encountered and exactly how you solved them.
• Technology choices – Justification for the languages and frameworks you used.

Example questions or scenarios:

• "Tell me about the most challenging bug you faced in your last project and how you fixed it."
• "Walk us through the architecture of the application you are currently working on."
• "You listed [Technology X] on your resume; explain how you used it to solve [Problem Y]."

Behavioral and Company Fit

Cultural alignment is not a buzzword at MSD; it is a requirement. You will face "character-building" questions designed to test your resilience, ethics, and ability to work in a team.

Be ready to go over:

• Situational judgment – How you react to deadlines, conflict, or ambiguity.
• Company research – Demonstrating knowledge of MSD's business units and products.
• Self-presentation – In some locations (e.g., Ireland), candidates have been asked to give a PowerPoint presentation about themselves.

Example questions or scenarios:

• "What do you know about MSD and our products?"
• "Describe a time you had a conflict with a team member. How did you resolve it?"
• "If you were given a task with unclear requirements, how would you proceed?"