How to Interview Software Engineers for B2B SaaS Companies

In the competitive landscape of B2B SaaS companies, finding the right software engineers is critical for success.

These engineers not only build and maintain the products but also ensure that they scale, remain secure, and meet the ever-evolving needs of business clients.

Crafting an effective interview process is essential to identify candidates who are not only technically proficient but also aligned with your company’s goals and culture.

Here’s a comprehensive guide on how to interview software engineers for B2B SaaS companies.

1. Define clear job requirements

Before initiating the interview process, it’s crucial to have a detailed job description. This should outline the necessary technical skills (e.g., programming languages, frameworks, tools), experience level, and soft skills such as communication and teamwork. For B2B SaaS companies, it’s particularly important to include experience with scalable systems, cloud computing, and security practices.

2. Pre-screening candidates

The pre-screening stage helps to filter out unqualified candidates early on. This can be done through:

  • Resume Screening: Look for relevant experience, especially in B2B SaaS environments. Pay attention to projects that involved scalability, complex integrations, or significant user bases.
  • Technical Assessments: Use coding challenges and quizzes to assess basic programming skills and problem-solving abilities. Platforms like TestGorilla can be useful.
  • Initial Phone Interview: Conduct a brief call to gauge communication skills, cultural fit, and clarify any questions about the resume.

3. Technical interviews

Technical interviews are the core of the hiring process for software engineers. These should be designed to test not only technical knowledge but also the candidate’s approach to problem-solving and coding practices.

  • Coding Challenges: These should mirror real-world problems the candidate might face. Include tasks that require writing code from scratch, debugging, and optimizing existing code.
  • System Design: Since B2B SaaS products often involve complex architectures, include a system design interview. Ask candidates to design a scalable system, focusing on aspects like database design, API development, load balancing, and fault tolerance.
  • Pair Programming: Conduct a pair programming session where the candidate works alongside an interviewer on a problem. This helps assess their collaborative skills and coding style.
  • Code Review: Provide a piece of code and ask the candidate to review it. This will demonstrate their understanding of best practices, attention to detail, and ability to provide constructive feedback.

4. Behavioral interviews

Technical skills are crucial, but so are soft skills. Behavioral interviews help understand how a candidate handles various work situations and aligns with your company culture.

  • Scenario-Based Questions: Ask about past experiences where they faced challenges, worked in a team, or had to learn a new technology quickly. For example, “Tell me about a time you had to troubleshoot a major system outage. What was your approach?”
  • Cultural Fit: Discuss the company’s values and work culture. Ask questions to understand if the candidate’s values align with those of your company.
  • Client Interaction: Given the nature of B2B SaaS, engineers might need to interact with clients. Assess their ability to communicate technical concepts to non-technical stakeholders.

5. Technical culture fit

Ensure that the candidate fits into your technical culture. This includes coding standards, agile practices, and the development workflow.

  • Coding Standards: Discuss the coding standards your team follows and see how the candidate responds. Do they understand the importance of clean code and documentation?
  • Agile Practices: If your company uses agile methodologies, ask about their experience with agile practices like sprint planning, stand-ups, and retrospectives.
  • Tool Proficiency: Ensure the candidate is comfortable with the tools and technologies your team uses, such as version control systems, CI/CD pipelines, and project management tools.

6. Practical assignments

Consider giving candidates a take-home assignment. This allows them to demonstrate their skills in a more relaxed environment and gives insight into their coding practices and problem-solving abilities over a longer period.

7. Reference checks

Finally, conduct thorough reference checks. Speak with previous employers or colleagues to get a sense of the candidate’s work ethic, technical capabilities, and team dynamics.


Interviewing software engineers for B2B SaaS companies requires a comprehensive approach that evaluates both technical proficiency and cultural fit.

By defining clear job requirements, conducting thorough technical and behavioral interviews, and using practical assignments, you can identify candidates who will contribute significantly to your company’s success.

Remember, the goal is not just to find a technically skilled engineer, but someone who can thrive in your company’s environment and drive your product forward.

PS – make sure to check out TestGorilla. It will allow you to screen and identify the best candidates.

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