SJE-Rhombus Software Engineer interview questions & guide 2026

The following questions reflect the patterns observed in recent interviews at SJE-Rhombus. While specific technical prompts may shift based on whether you are interviewing for an automation-heavy role or a design-focused role, these categories represent the core areas of assessment.

Project Experience and Technical Application

These questions are designed to gauge your ability to articulate the "why" and "how" behind your past technical work.

• Walk me through a specific project where you solved a complex technical challenge.
• Describe a time you had to troubleshoot a software issue that was interacting with hardware components.

Preparation at SJE-Rhombus requires a balanced approach. You must demonstrate high technical proficiency while showing that you can communicate effectively with cross-functional teams.

Technical Competency – This involves your ability to apply software principles to control systems. You should be prepared to discuss your proficiency in relevant programming languages and your familiarity with PLC/HMI environments or VFD design.

Problem-Solving Approach – Interviewers look for a structured methodology when you encounter technical roadblocks. Be ready to explain your process for diagnosing issues, testing solutions, and validating your work in an environment where safety and reliability are paramount.

Cross-Functional Collaboration – Since you will work alongside operations and electrical teams, your ability to speak "their language" is critical. Demonstrate your capacity to translate software requirements into practical, reliable solutions that support the broader team's objectives.

The interview process at SJE-Rhombus is designed to be thorough yet collaborative, reflecting the company's commitment to team-based decision-making. You can expect a clear, professional progression that focuses on evaluating both your technical skills and your alignment with the company’s operational culture.

The process typically begins with an initial screening, often led by HR, to establish a baseline of your experience and career goals. Subsequent rounds involve deeper technical assessments where you will meet with engineering and operations managers. The focus is on ensuring you have the technical depth to contribute immediately while being a good cultural fit for their multidisciplinary teams.

This timeline illustrates the progression from initial screening to deeper technical and managerial discussions. Candidates should use this structure to pace their preparation, ensuring they are ready to discuss both high-level project achievements in early rounds and specific technical problem-solving in later rounds.

Technical Proficiency in Controls and Software

This area evaluates your core engineering skills. Interviewers look for a solid grasp of software development lifecycles and how they apply to industrial hardware.

Be ready to go over:

• PLC/HMI Programming – Understanding ladder logic or structured text in an industrial context.
• Hardware Integration – How software communicates with VFDs, sensors, and other field devices.

As a Software Engineer at SJE-Rhombus, your primary responsibility is to develop and maintain software that drives the next generation of control products. You will be responsible for the full lifecycle of your software components—from initial design and coding to debugging and field support.

You will frequently collaborate with electrical and systems engineers to ensure that software logic aligns perfectly with hardware capabilities. This is not a siloed role; you will be expected to participate in design reviews, provide input on system architecture, and occasionally assist in troubleshooting issues that arise during product testing or deployment. You are the bridge between the digital logic and the physical pumps and controls that serve the company's clients.

A strong candidate for this position brings a blend of software engineering rigor and an understanding of electromechanical systems.

• Must-have skills: Proficiency in languages relevant to embedded or control systems, strong analytical problem-solving skills, and the ability to work in a cross-functional team.
• Nice-to-have skills: Prior experience with industrial automation, PLC/HMI platforms, or VFD design is highly valued and will significantly differentiate your application.
• Experience level: The company hires across a spectrum of experience, from early-career engineers who can demonstrate a high learning aptitude, to senior staff who can lead complex control system designs.

Q: How difficult are the technical interviews? A: The difficulty is moderate and focused on practical application rather than abstract theory. You should be prepared to talk about real-world projects you have completed.

Q: What is the typical timeline for the hiring process? A: While it varies, the process generally moves at a steady, professional pace. You can expect to hear back within a reasonable timeframe after each round of interviews.

Q: Does the role involve remote work? A: Expectations for remote or hybrid work depend on the specific location and team. Be sure to clarify this with your recruiter during the initial screening.

Q: What differentiates a successful candidate? A: Successful candidates are those who show both deep technical curiosity and a genuine interest in the industrial automation space. Demonstrating that you understand the impact of your work on the end-user is a major plus.

• Prepare your stories: Use the STAR method (Situation, Task, Action, Result) to structure your answers for behavioral questions.
• Focus on the "Why": Don't just explain what you did; explain why you chose that specific solution over others.
• Know the company: Research SJE-Rhombus products and their position in the water/wastewater industry to show genuine interest.
• Ask thoughtful questions: Use your interview time to ask about team dynamics, current engineering challenges, and how the company fosters professional growth.

The Software Engineer role at SJE-Rhombus is a challenging and rewarding position that sits at the center of innovation for critical infrastructure. By focusing on your technical foundations, your ability to collaborate across disciplines, and your capacity to solve real-world hardware-software problems, you will be well-positioned to succeed.

You can explore additional interview insights, practice questions, and preparation resources on Dataford. Thorough preparation is the best way to build confidence and ensure your skills shine through during the interview process. We wish you the best of luck as you take this next step in your engineering career.

The compensation data provided above reflects typical salary ranges for various engineering levels at SJE-Rhombus. Candidates should interpret these figures as a guide for market expectations, keeping in mind that total compensation may include additional benefits and that offers are typically commensurate with specific experience and location.