Comaen. Find Your Spark. Software Engineer interview questions & guide 2026

Your preparation should focus on articulating your hands-on experience and demonstrating a structured approach to engineering. We value candidates who can show how they move from a conceptual requirement to a functional, optimized machine.

Role-related Knowledge – We look for a deep understanding of PLC and SCADA architectures. You should be prepared to discuss your proficiency in industry-standard languages and your familiarity with platforms like Siemens or Beckhoff.

Problem-solving Ability – We evaluate how you break down complex, multi-layered automation challenges. Focus on explaining your methodology: identifying the issue, testing hypotheses, and implementing a robust, scalable solution.

Communication and Responsibility – As an engineer who will interact with clients and travel for commissioning, your ability to communicate clearly is vital. We look for candidates who take full ownership of their work and can manage expectations effectively.

The interview process at Comaen. Find Your Spark. is designed to be as transparent as it is rigorous. We prioritize getting to know you as a professional, focusing on your technical background, your approach to challenges, and how your personal goals align with our culture of innovation and growth. You can expect a process that respects your time while ensuring we both gain a clear picture of whether this role is the right "spark" for your career.

This timeline illustrates the progression from initial contact to final decision. Candidates should use this structure to prepare for both technical deep-dives and behavioral discussions. Please note that the pace can vary depending on the specific department and the urgency of the project.

PLC and SCADA Development

We evaluate your ability to write clean, efficient, and modular code. We look for a disciplined approach to version control and documentation.

Be ready to go over:

• Logic implementation – How you structure your code for readability and troubleshooting.
• Hardware interfacing – Your experience connecting PLC systems to HMI and SCADA software.
• Advanced concepts – Knowledge of safety-rated PLC programming and fieldbus communication protocols.

Example scenarios:

• "Walk me through how you would structure a project for a new machine assembly."
• "How do you handle hardware-in-the-loop testing before going to a site?"

As a Software Engineer, your day-to-day is defined by high-impact tasks that bring industrial processes to life. You will spend significant time analyzing client requirements and transforming them into functional and technical specifications. This involves not only writing the code but also creating the necessary documentation that allows our systems to be audited and maintained long after the initial setup.

Collaboration is at the heart of your work. You will frequently work alongside senior engineers to troubleshoot complex issues, and you will act as a primary point of contact during commissioning phases. Whether you are in the office optimizing a loop or on-site in a plant, your focus remains on ensuring that our automation solutions deliver the performance our clients expect.

We are looking for individuals who combine technical expertise with a proactive, "can-do" mentality.

• Must-have skills:

• HBO (Bachelor’s) degree in Electrical Engineering, Mechatronics, or Technical Informatics.

• Solid experience (0-5 years) with PLC programming languages (LAD, SCL, FBD).

• Proficiency with at least one major platform: Siemens, Beckhoff, Allen-Bradley, or Bachmann.

• Professional fluency in both Dutch and English.

• Flexibility to travel for international projects.

• Nice-to-have skills:

• Experience with SCADA/HMI visualization design.

• Familiarity with See Electrical or similar design software.

• Prior experience in the offshore or food processing industries.

Q: How long does the hiring process typically take? A: We aim for an efficient process, usually spanning two to four weeks from the initial screen to the final offer, depending on scheduling availability.

Q: Is there an opportunity for growth within the company? A: Absolutely; Comaen. Find Your Spark. is committed to personal development, with clear paths to roles such as Senior Engineer or Lead Engineer as you gain experience.

Q: How much travel is actually involved? A: Travel depends on the project, but you should be prepared for both domestic and international commissioning, which is a core part of the role's hands-on nature.

• Show your process: When answering technical questions, don't just give the final answer. Explain the "why" behind your choices.
• Be ready to discuss your projects: Select 2-3 past projects you are particularly proud of and be prepared to explain the technical hurdles you overcame.
• Research our sectors: Familiarize yourself with the industries we serve, such as recycling, water treatment, or offshore, to show you understand our business context.
• Ask meaningful questions: Use your interview time to ask about our team's vision, current technical challenges, or the mentorship programs we offer.

The Software Engineer position at Comaen. Find Your Spark. offers a unique opportunity to work on high-stakes, global automation projects while growing your technical and leadership capabilities. By focusing on your core engineering competencies, demonstrating a structured approach to problem-solving, and showing a genuine passion for industrial innovation, you will be well-positioned for success.

We encourage you to review your project history and be prepared to share your experiences openly. For further insights and to refine your preparation, you can explore additional resources on Dataford. You have the potential to make a significant impact here; prepare thoroughly, stay confident, and we look forward to seeing the spark you bring to our team.

The salary data provided reflects the competitive compensation packages we offer, which are tailored to your specific experience level and the scope of the projects you will manage. Use this as a benchmark to ensure your expectations align with our commitment to rewarding technical expertise and professional growth.