HAHN Automation Group Software Engineer interview questions & guide 2026

The interview process at HAHN Automation Group is designed to gauge your technical proficiency and your ability to apply software concepts to industrial automation. The following questions represent the themes you should expect; use them to practice articulating your experience and technical depth.

Technical Competency

This category focuses on your familiarity with industrial programming environments, specifically PLC (Programmable Logic Controller) systems and related communication protocols.

• What PLC protocols do you use in your current projects?
• How do you approach debugging code on a live machine?

Preparation for HAHN Automation Group should be grounded in your ability to demonstrate both technical mastery and a pragmatic approach to engineering. You are not just writing code; you are building systems that operate in high-stakes environments.

Technical Domain Knowledge – You must be prepared to discuss your specific expertise in PLC programming and industrial automation software. Interviewers look for deep familiarity with the tools and languages you have used in your career. Be ready to explain the "why" behind your technical choices, not just the "how."

Problem-Solving & Debugging – Industrial automation involves troubleshooting physical systems. Demonstrate your ability to think systematically when faced with a machine failure or a logic error. Explain your methodology for isolating issues, testing hypotheses, and implementing robust fixes.

Cross-Functional Collaboration – Since software is only one part of the machine, your ability to communicate with non-software engineers is critical. Highlight instances where you successfully translated technical requirements into actionable code while working alongside mechanical or electrical teams.

The interview process at HAHN Automation Group is generally straightforward, prioritizing a clear assessment of your technical capabilities and cultural fit. You should expect a streamlined experience that respects your time while providing ample opportunity to showcase your skills.

Typically, the process begins with an initial screening call with an HR representative. This conversation focuses on your high-level work experience, your interest in the company, and logistical alignment. Following this, you will proceed to a technical interview, often with a lead engineer or a technical manager, where you will dive deep into your programming background and your approach to automation challenges.

The timeline above illustrates the standard progression from initial screening to technical evaluation. You should treat this as a guide for your preparation: use the time between the HR screen and the technical interview to refresh your knowledge of PLC protocols and review your past projects in detail.

Industrial Programming & PLC Expertise

This is the core of the evaluation. Interviewers want to verify that your technical skills are directly applicable to the company's hardware and automation needs. Strong performance here means demonstrating fluency in the specific programming languages and platforms used at HAHN Automation Group.

Be ready to go over:

• Proficiency in standard PLC programming languages.
• Understanding of industrial communication protocols.

As a Software Engineer, your primary responsibility is the development and maintenance of software that controls industrial automation processes. You will spend a significant portion of your time designing logic for PLCs, integrating various machine components, and ensuring that the software layer is robust enough to handle the rigors of a factory environment.

Beyond individual coding, you serve as a critical technical bridge. You will work alongside mechanical and electrical engineers to define machine requirements and ensure that the software fulfills the intended mechanical function. You are expected to be an active participant in testing and commissioning phases, which may involve on-site work to verify that your code performs as expected on the physical machine.

Candidates who succeed at HAHN Automation Group are those who combine technical rigor with a practical, hands-on mindset. You must be comfortable working in environments where software and hardware are tightly coupled.

• Must-have skills: Proven experience in PLC programming, deep familiarity with industrial automation protocols, and a strong understanding of industrial control systems.
• Nice-to-have skills: Experience with industrial robotics, knowledge of safety-rated control systems, and familiarity with HMI (Human Machine Interface) design.
• Soft skills: Clear communication, the ability to work in a cross-disciplinary team, and a methodical approach to troubleshooting.

Q: How difficult are the technical interviews? The difficulty is generally considered average. The focus is not on abstract computer science puzzles but on your practical knowledge of the tools and systems you use in your daily work.

Q: What is the best way to prepare for the technical round? Prepare a comprehensive list of your PLC knowledge, the specific languages you excel in, and key projects you have completed. Be ready to explain your technical decisions in a clear, concise manner.

Q: How long does the hiring process typically take? The process is usually efficient, involving a phone screen followed by an interview with the technical lead. You can expect a professional pace throughout the experience.

Q: Is there an on-site interview component? Depending on the location and specific team, you may be invited for an on-site interview to meet the engineering team. This is a great opportunity to get a sense of the company's culture and working environment.

• Prepare your portfolio: Have a clear narrative for your past projects. Explain the goal, your specific contribution, and the final outcome of the automation project.
• Focus on safety: In automation, safety is paramount. Always mention safety considerations when discussing your design and programming choices.
• Be ready for technical depth: When asked about a protocol or language, don't just state you know it. Provide a brief example of how you have applied it effectively in a professional setting.
• Research the company's products: Familiarize yourself with the types of automation HAHN Automation Group provides. Understanding their product space will make your answers more relevant and demonstrate genuine interest.

The Software Engineer role at HAHN Automation Group offers a unique opportunity to shape the future of industrial automation. By combining your technical expertise with a collaborative mindset, you can directly influence the success of high-precision manufacturing systems. Your preparation should be centered on demonstrating your practical mastery of automation tools and your ability to solve real-world engineering challenges.

Candidates can explore additional interview insights, practice questions, and preparation resources on Dataford. We encourage you to reflect on your project history and be ready to articulate your technical process with confidence. With focused preparation, you are well-positioned to succeed in your interview process and demonstrate the value you bring to the HAHN Automation Group team.

The module above provides insights into compensation trends for this position. Use this data to help manage your expectations regarding salary, components, and seniority-based variations within the industry.