TES Software Engineer interview questions & guide 2026

The questions below represent the patterns observed in interviews for Software Engineer roles at TES. While your specific interview may vary based on your team and seniority, you should prepare to discuss both your technical problem-solving approach and your ability to apply those skills to construction and engineering domains.

Technical & Domain Knowledge

These questions test your ability to apply software engineering principles to the specific technical requirements of TES projects, including cost management and HVAC systems.

• How do you ensure the accuracy of data in cost-estimation software?
• Describe your process for debugging a complex integration between two engineering platforms.

Preparation at TES requires more than just technical memorization; it demands a clear understanding of how your code impacts real-world physical systems. Focus your efforts on bridging the gap between software theory and operational reality.

Technical Proficiency – You will be evaluated on your core programming skills and your ability to write clean, maintainable, and scalable code. Expect to demonstrate your knowledge of the software development lifecycle, from initial design to final deployment and maintenance.

Domain Adaptability – Because TES operates in specialized fields like cost engineering and HVAC construction, your ability to quickly learn and apply domain-specific logic is essential. Show your interviewers that you are curious about the "why" behind the projects you support.

Communication & Collaboration – As a Software Engineer, you will interact with project managers, construction engineers, and operations staff. You must demonstrate the ability to translate technical requirements into actionable solutions while maintaining clear, professional communication.

The interview process at TES is designed to be rigorous yet collaborative, reflecting the company's commitment to precision and safety. You can expect a structured journey that begins with an initial screening to gauge your background and cultural alignment, followed by deeper technical dives. The pace is professional and deliberate, ensuring that the team evaluates your fit for both the technical stack and the collaborative nature of the projects.

This timeline provides a high-level view of your potential progression from initial contact to the final decision. Use this structure to pace your study—prioritize deep-dive technical preparation for the middle stages and focus on behavioral alignment and situational scenarios for the final rounds.

Technical Rigor

This area assesses your fundamental engineering skills. You will be evaluated on your ability to write efficient code and your understanding of systems architecture. A strong candidate demonstrates not just the "how" but the "why" behind their technical choices.

Be ready to go over:

• Code Quality – Writing clean, documented, and testable code.
• System Design – Designing modular systems that can handle large datasets typical of construction projects.

As a Software Engineer at TES, you are responsible for the entire development lifecycle of the tools and systems that drive the company’s engineering operations. This involves close collaboration with the construction and cost-engineering teams to ensure that the software is not only functional but also highly reliable in high-pressure environments.

You will be expected to:

• Develop and maintain software applications used for cost estimation, construction planning, and HVAC system monitoring.
• Collaborate with cross-functional teams to integrate software solutions with existing hardware and data systems.
• Participate in code reviews and architectural discussions to ensure the long-term maintainability of the codebase.
• Document system requirements and provide technical support for users who rely on your tools for daily operations.

A competitive candidate for a Software Engineer position at TES possesses a blend of strong technical fundamentals and the adaptability to work within the construction and engineering sectors.

• Must-have skills: Proficiency in core programming languages relevant to the team's stack, experience with database management, and a strong grasp of software testing methodologies.
• Nice-to-have skills: Previous experience in engineering, construction, or HVAC-related software development is a significant advantage. Familiarity with project management tools and CAD integration is also highly valued.
• Soft skills: Clear, concise communication and the ability to work effectively in a team-oriented, deadline-driven environment are mandatory.

Q: How difficult is the interview process? A: The process is challenging but fair. It focuses on your ability to apply your skills to real-world problems, so expect the difficulty to stem from the need to think critically about system trade-offs rather than just answering rote technical questions.

Q: What differentiates successful candidates? A: Successful candidates are those who show genuine interest in the TES mission. Demonstrating that you understand how your software impacts the physical world—such as cost savings or improved construction efficiency—will set you apart.

Q: How long does the process take? A: The timeline can vary depending on the specific team and project urgency. Generally, you should expect a few weeks of engagement from the initial screening to the final interview.

Q: Is there a specific culture I should be aware of? A: TES values precision, reliability, and collaboration. The culture is professional and project-focused, meaning you should be prepared to work with diverse teams who rely on your technical expertise to meet critical milestones.

• Prepare for the "Why": Always be ready to explain why you chose a specific technology or approach in your past projects.
• Focus on Impact: When discussing your experience, quantify your impact. Mention how your software improved efficiency or reduced errors.
• Understand the Domain: Spend time researching the basics of the construction or HVAC industry to show you are invested in the company's core business.

The Software Engineer role at TES offers a unique opportunity to apply your technical skills to complex, high-impact infrastructure projects. By focusing on your technical fundamentals, demonstrating your ability to collaborate across functions, and showing an genuine interest in the engineering domain, you will be well-positioned to succeed. Remember that your interviewers are looking for a teammate who can solve problems and communicate effectively in a demanding environment.

You can explore additional interview insights, practice questions, and preparation resources on Dataford to further refine your strategy. Consistent, focused preparation will help you approach your interviews with the confidence needed to excel.

The compensation data provided reflects the current market ranges for engineering positions within the company. Use these figures to gauge your expectations regarding seniority levels and the total compensation package, keeping in mind that actual offers may vary based on experience and specific project needs.