Cundall Software Engineer interview questions & guide 2026

The salary range provided reflects current market benchmarks for this position. Candidates should interpret these figures as a starting point for negotiation, noting that compensation packages at Cundall often include competitive benefits and professional development support tailored to your specific level of experience and location.

Our interview process is designed to look beyond your technical credentials to understand how you think, communicate, and solve problems in a team environment. While questions vary by team and region, the following categories represent the core areas we explore during the selection process.

Technical and Domain Knowledge

These questions test your ability to apply engineering principles to software solutions and ensure you have the foundational knowledge required for our specific projects.

• Explain the difference between Carbon Neutral and Net Carbon Zero.
• How would you optimize a building's energy consumption and what metrics would you use?

Preparation at Cundall should be focused on demonstrating both your technical depth and your ability to integrate into a professional consultancy environment. We look for candidates who can articulate their thought process clearly and show a genuine interest in the specific engineering challenges we tackle.

Role-Related Knowledge – You must be able to discuss how your technical skills apply to the built environment. Expect to link your programming or software experience to real-world applications like energy modeling or structural analysis.

Problem-Solving Ability – We evaluate how you break down ambiguous or complex problems. When faced with a hypothetical scenario, focus on your methodology: define the constraints, identify the variables, and justify your proposed solution.

Communication and Collaboration – As a consultant, your ability to explain complex technical concepts to non-technical stakeholders is vital. Demonstrate this by keeping your answers structured, concise, and professional.

Values Alignment – Cundall places a high premium on sustainability and ethical engineering. Be prepared to discuss your personal commitment to these values and how you envision them manifesting in your daily work.

The interview journey at Cundall is thorough and designed to give both you and our team a clear view of how we would work together. Depending on the seniority and location of the role, you can expect a mix of virtual and in-person stages. We prioritize a candidate-friendly experience, with many applicants noting that our team goes out of their way to explain the company’s mission and the specific nature of the work.

The process often includes an assessment of your technical aptitude, followed by group exercises that test your collaborative spirit. We want to see how you interact with others under pressure and how you contribute to a collective goal. The final stages typically involve one-on-one interviews with senior management or partners, where the focus shifts toward your long-term potential and cultural fit within our global team.

This timeline illustrates the progression from initial screening to the final assessment stages. Use this to pace your preparation; ensure you have enough time to brush up on both your core technical domain and your behavioral examples before reaching the final interview rounds.

Technical Aptitude

We evaluate your ability to handle data, perform calculations, and understand the physical principles that underpin our software tools. Strong candidates show comfort with both theoretical knowledge and practical application.

• Foundational Engineering – Understanding of thermodynamics, energy modeling, and power systems.
• Attention to Detail – Ability to spot errors in technical drawings or documentation.
• Reporting – Proficiency in documenting your findings professionally.

As a Software Engineer at Cundall, your primary responsibility is the development and maintenance of digital solutions that enhance our engineering output. You will work closely with lead engineers and project managers to translate technical requirements into functional software. This includes writing efficient code, performing rigorous testing, and ensuring that your tools integrate seamlessly with the workflows of our design teams.

Collaboration is central to your day-to-day. You will often act as the bridge between the technical engineering staff and the digital team, ensuring that the tools we build are not only robust but also practical for the specific needs of our clients. You may find yourself involved in anything from automating data extraction from building models to developing proprietary tools for sustainability appraisals.

We seek individuals who possess a strong technical foundation and the professional maturity to work in a client-facing consultancy environment.

• Must-have skills: Proficiency in core programming languages relevant to engineering (e.g., Python, C#), strong analytical skills, and the ability to articulate technical concepts clearly.
• Nice-to-have skills: Prior experience in building services engineering, familiarity with BREEAM or similar sustainability frameworks, and experience with data visualization tools.
• Experience level: We value both graduates and experienced professionals who demonstrate a "can-do" attitude and a willingness to learn.

Q: How difficult are the interviews? A: Most candidates describe the difficulty as average. While the technical questions are standard for the industry, the emphasis is heavily placed on your communication style and ability to work in a team.

Q: How long does the process take? A: The process can vary significantly by region and team, ranging from a few weeks to over two months. We strive for efficiency, but thoroughness is a hallmark of our hiring process.

Q: What is the most important thing to prepare? A: Your ability to talk through your past projects. Be prepared to explain your personal role, the challenges you faced, and how you communicated your solutions to others.

Q: Is the assessment center stressful? A: While it is a demanding day, our candidates often find it to be a positive, high-energy experience. The atmosphere is designed to be professional yet welcoming.

• Do your homework: Research our recent projects and the specific sustainability goals we champion. Showing that you understand our business will set you apart.
• Prepare for "Why us?": You will almost certainly be asked why you want to work for a consultancy rather than a pure software house. Have a clear answer that highlights your interest in the built environment.
• Be concise: Whether in an email writing task or a verbal answer, clarity and brevity are highly valued at Cundall.
• Ask good questions: At the end of your interviews, have thoughtful questions ready about the team’s current challenges or the company’s future direction.

The Software Engineer role at Cundall offers a unique opportunity to shape the future of the built environment through digital innovation. By focusing on your ability to articulate your technical experience, demonstrating a collaborative mindset, and showing a genuine passion for sustainable engineering, you will be well-positioned to succeed in our interview process.

Remember that Cundall values the person behind the CV. Be professional, stay curious, and clearly communicate how your skills can help us solve the complex challenges our clients face. We encourage you to explore additional interview insights, practice questions, and preparation resources on Dataford to ensure you are fully prepared to demonstrate your potential. We look forward to learning more about you.