NOV Software Engineer interview questions & guide 2026

The following questions are representative of patterns seen in NOV interviews. While specific technical questions depend on the product group (e.g., drilling vs. subsea vs. automation), you should prepare to demonstrate both your technical depth and your ability to navigate professional challenges.

Technical & Domain Knowledge

These questions evaluate your proficiency in your specific stack and your ability to apply engineering principles to NOV’s hardware-heavy environment.

• What is the difference between a class and an interface?
• Can you explain a PID Control technique?

Preparation at NOV requires a balance of technical readiness and a clear understanding of your own professional narrative. You should be prepared to discuss your previous projects in detail, explaining not just the "what," but the "why" behind your design choices.

Role-Related Knowledge – You must be ready to discuss the technical stack listed on your resume, but also be prepared to pivot to the physical context of the work. If you are applying to a team that works on rig machinery, expect questions that bridge the gap between software and mechanical systems.

Problem-Solving Ability – Interviewers look for a systematic approach to ambiguity. When presented with a scenario—such as optimizing a legacy codebase or handling a massive influx of data—clearly articulate your thought process before jumping into a solution.

Communication & Collaboration – NOV is a massive, global organization. You will be evaluated on your ability to explain complex technical concepts to non-technical stakeholders, such as project managers or commercial leads.

The interview process at NOV is designed to be thorough but professional. It typically begins with a recruiter screening to verify your qualifications and interest, followed by one or more technical rounds. Depending on the seniority and location of the role, these may be conducted via phone, video call, or in person.

You can expect a mix of interviews with hiring managers, technical leads, and occasionally cross-functional partners like project or commercial managers. The process often includes a deep dive into your past projects, a technical assessment (which could range from a whiteboard coding problem to a take-home task), and a discussion about how you fit into the existing team culture.

This timeline illustrates the progression from initial screening to technical and behavioral evaluations. Use this to pace your study: prioritize core technical fundamentals early, and save your "storytelling" preparation—your projects, failures, and successes—for the later-stage manager interviews.

Technical Depth & Application

NOV values engineers who can apply theory to practice. You will be evaluated on your ability to write clean, maintainable code, but also on your understanding of the Software Development Life Cycle (SDLC) and how your software interacts with external systems.

Be ready to go over:

• OOP Principles – Proficiency in classes, inheritance, and interfaces.
• System Integration – How your software interfaces with databases (SQL) or hardware control systems.

As a Software Engineer at NOV, you will be responsible for the development, maintenance, and optimization of software that supports our global operations. Your day-to-day will involve translating high-level requirements into functional, robust code. You will often work within a team of other developers and engineers to ensure that the digital tools you build remain performant under the rigorous demands of industrial environments.

Collaboration is a cornerstone of this role. You will frequently interface with project managers to align your technical roadmap with commercial goals, and with field engineers to understand how your software performs in the real world. You may also be tasked with conducting code reviews, documenting your processes, and participating in the continuous improvement of the team's development standards.

A competitive candidate for this position brings a solid foundation in software engineering, paired with a willingness to learn the unique demands of the energy industry.

• Must-have skills: Proficient in at least one object-oriented language (e.g., C#, C++, Go), strong understanding of SQL, and familiarity with SDLC practices.
• Nice-to-have skills: Experience with industrial control systems, PLC logic, CAD software, or experience in the oil and gas sector.
• Soft skills: Excellent communication, ability to explain technical limitations to stakeholders, and a proactive approach to problem-solving.

Q: How difficult are the technical interviews? A: The difficulty is generally moderate. The focus is usually on your ability to think through a problem logically rather than memorizing syntax. Be prepared for a mix of coding tasks and scenario-based questions.

Q: Should I expect a take-home test? A: It is possible. Some teams use small take-home tasks to gauge your coding style and ability to solve real-world problems. They are typically designed to be completed in a few hours.

Q: What is the most common reason candidates succeed? A: Successful candidates demonstrate a high degree of intellectual curiosity and a clear, structured way of communicating their experience. Showing genuine interest in how NOV’s technology impacts the world goes a long way.

Q: How long does the process take? A: Timelines vary significantly by location and team, but it typically spans from a few weeks to a couple of months. Stay patient and maintain professional communication with your recruiter.

• Know your resume: Be prepared to talk about every project on your resume in detail. You will be asked about the design choices you made and why you made them.
• Ask meaningful questions: Use the end of the interview to ask about the team’s current development goals or how they handle cross-functional collaboration. This shows you are already thinking like a member of the team.
• Be honest about your limits: If you don't know an answer, explain how you would go about finding it. NOV values problem-solving over rote memorization.

The role of Software Engineer at NOV offers a unique opportunity to apply your technical skills to some of the most complex and impactful machinery in the world. By focusing on your core technical fundamentals, sharpening your ability to articulate your past project experiences, and demonstrating a clear interest in how digital solutions drive industrial progress, you will position yourself as a strong candidate.

Remember that preparation is the most effective way to manage interview anxiety. Candidates can explore additional interview insights, practice questions, and preparation resources on Dataford to further refine their approach and build confidence.

The provided salary data reflects the range of compensation for this role, which includes base salary and potentially other benefits. When interpreting this data, consider that compensation varies based on your location, years of experience, and the specific requirements of the product group you are joining. Use this as a benchmark to ensure your expectations align with the market and your level of seniority.