First Due Software Engineer interview questions & guide 2026

Our interview process is designed to evaluate your technical depth, your problem-solving logic, and your ability to apply core software engineering principles to practical scenarios. The following questions are representative of the patterns you will encounter during your technical assessments.

PHP Technical Proficiency

These questions test your mastery of the language and your ability to leverage its ecosystem effectively.

• What are the different ways to call a constructor in PHP?
• Name at least 5 array functions in PHP and explain their specific use cases.

Preparation at First Due should focus on demonstrating both your mastery of core languages and your capacity for architectural thinking. Do not just memorize syntax; be prepared to explain the "why" behind your technical decisions.

Technical Depth – We expect you to have a strong command of PHP and its surrounding ecosystem. You should be able to articulate how to use built-in functions and dependency managers to write efficient, clean code.

Architectural Rigor – You will be evaluated on your ability to design systems that adhere to industry-standard patterns like SOLID. Be prepared to discuss how these principles improve code quality and long-term maintainability.

Problem-Solving Capability – We look for engineers who can break down complex requirements into manageable technical tasks. When discussing past challenges, focus on your analytical process, the trade-offs you considered, and the final impact of your solution.

The interview process at First Due is structured to be thorough yet respectful of your time. It typically begins with an initial screening to align on expectations, followed by a technical assessment. You can expect a mix of practical coding exercises and deeper technical discussions with members of our engineering team.

Our philosophy is centered on evaluating real-world competency. We avoid "gotcha" questions in favor of scenarios that mirror the actual work you will perform here. You will interact with both individual contributors and potentially broader team members to ensure a well-rounded assessment of your technical skills and team alignment.

This visual timeline highlights the progression from initial screening to final technical rounds. Use this to pace your study schedule, ensuring you have time to refresh both your core language knowledge and your ability to articulate past project experiences. Note that while the flow is consistent, the depth of technical discussion may increase based on the specific team you are interviewing with.

Technical Competency

We prioritize candidates who can demonstrate deep knowledge of PHP. Beyond basic syntax, we look for your ability to manipulate data structures and manage dependencies.

Be ready to go over:

• Array manipulation – Using native functions to handle complex data sets.
• Dependency management – Understanding the nuances of package versioning and environmental consistency.

As a Software Engineer, you will be responsible for the full development lifecycle of features within our platform. This includes writing server-side code, optimizing existing processes, and participating in code reviews to maintain high quality across the team.

You will collaborate closely with product managers and other engineers to scope new functionality and troubleshoot production issues. You will be expected to take ownership of your tasks, ensuring that the features you build are not only functional but also performant and secure. Your ability to communicate technical constraints to non-technical stakeholders is a vital part of the role.

A strong candidate for this role is someone who has moved beyond entry-level programming and can demonstrate a track record of building reliable software.

• Must-have skills: Proficient in PHP, deep understanding of object-oriented programming, and familiarity with dependency management tools like Composer.
• Nice-to-have skills: Experience with modern PHP frameworks, familiarity with cloud-based infrastructure, and experience working in an Agile/Scrum environment.
• Soft skills: Clear communication, a proactive approach to problem-solving, and the ability to work collaboratively in a team-oriented culture.

Q: How long does the interview process typically take? The process usually spans a few weeks, depending on scheduling. We aim to move efficiently while ensuring we have enough time to get to know you.

Q: Is the technical round done on a whiteboard or a computer? Most technical rounds are conducted online using collaborative tools or shared environments that allow you to write and test your code in a real-world-like setting.

Q: What is the culture like at First Due? We value transparency, technical excellence, and a collaborative spirit. We are solving mission-critical problems, so we look for engineers who are passionate about building high-quality, reliable systems.

Q: How should I prepare for the behavioral questions? Use the STAR method (Situation, Task, Action, Result) to structure your answers. Focus on the specific impact you had and what you learned from the experience.

• Review your previous projects: Be ready to discuss the "why" behind your technical choices in your past work.
• Practice clean code: Even in a time-constrained coding round, prioritize naming conventions and modularity.
• Ask meaningful questions: Use the end of your interviews to ask about the team’s current technical challenges or the product roadmap.
• Be honest about your limits: If you don’t know an answer, explain how you would go about finding the solution.

The Software Engineer role at First Due is an opportunity to build technology that truly matters. By focusing on your core PHP skills, mastering SOLID principles, and preparing to talk through your past engineering challenges, you will put yourself in the best position to succeed. We look for engineers who are not only technically capable but also driven by the impact their code has on our users.

You can explore additional interview insights, practice questions, and preparation resources on Dataford. We encourage you to use these tools to refine your approach and build your confidence before your first round.

The compensation data provided above reflects typical ranges for this role. Candidates should interpret these figures as a guideline, as final offers are dependent on factors such as specific experience level, technical seniority, and the current market landscape for your location.