Side Software Engineer interview questions & guide 2026

To help you prepare effectively, we have compiled a representative list of questions drawn from real interview experiences at Side. These questions are categorized by technical track and focus area to help you identify patterns and structure your preparation.

Data Structures & Algorithms (DSA)

This category evaluates your core problem-solving skills, algorithmic efficiency, and ability to manipulate basic data structures under time constraints.

• How do you find duplicate elements in an array using a hash map, and what is the time complexity of this approach?
• Write a function to reverse a singly linked list both iteratively and recursively.

Preparing for an interview at Side requires a structured approach that balances technical mastery with communication skills. Because the interview process evaluates both your coding proficiency and your ability to collaborate effectively within a team, you should focus on structuring your thoughts and explaining your reasoning clearly.

To stand out as a candidate, you must demonstrate strength across several key evaluation criteria:

Technical Excellence – This is the foundation of your evaluation. You must show a deep understanding of computer science fundamentals, language-specific mechanics (such as JavaScript, Swift, or Java), and modern development best practices.

System & Application Design – You will be evaluated on your ability to design scalable, maintainable, and highly available systems. You should be ready to discuss architectural trade-offs, database choices, and caching strategies.

Communication & Collaboration – Side places a strong emphasis on communication. Your ability to articulate your thought process, write clearly, and collaborate with cross-functional partners is assessed throughout the entire loop, starting from the initial HR screen.

Problem-Solving & Adaptability – Interviewers want to see how you approach ambiguous requirements and navigate complex technical constraints. Demonstrating a structured, analytical approach to problem-solving is critical to your success.

The interview process at Side is designed to thoroughly evaluate your technical capabilities, communication skills, and alignment with the company's engineering standards. While the exact steps may vary slightly depending on your target team and specialization (such as frontend, backend, mobile, or QA), the overall structure remains highly consistent and rigorous.

The process typically begins with an initial HR screening to review your resume, discuss your career goals, and assess your basic communication skills. Following a successful screen, candidates often undergo an English language and communication assessment, frequently conducted on platforms like TestGorilla. This step ensures that all engineers can collaborate seamlessly in a highly communicative and cross-functional environment.

Once the initial assessments are complete, you will enter the core technical rounds. These rounds are tailored to your specific engineering track. For example, frontend candidates will face deep dives into JavaScript, CSS, and React, while mobile candidates will be tested on Swift fundamentals and push notifications. Backend candidates can expect coding challenges focused on data structures, algorithms, and system design. The final stage of the process involves a managerial or operations discussion and a concluding HR round to finalize compensation and culture fit.

The visual timeline above outlines the typical progression of the interview stages at Side. Candidates should use this timeline to pace their preparation, ensuring they allocate sufficient time to practice coding, review system design principles, and prepare for behavioral discussions. Note that the transition from initial screens to technical rounds usually takes about one to two weeks, depending on candidate and interviewer availability.

To excel in the technical loops at Side, you need to understand exactly what your interviewers are looking for in each specific competency area.

Coding & Algorithmic Problem Solving

This area evaluates your ability to translate logical thoughts into clean, efficient, and bug-free code. Interviewers want to see how you structure your code, handle edge cases, and analyze time and space complexity.

Be ready to go over:

• Array and String Manipulation – Efficiently searching, sorting, and transforming linear data structures.

As a Software Engineer at Side, your day-to-day activities will revolve around shipping high-quality software and collaborating with your team to drive product innovation. You will be expected to:

• Design, develop, and maintain scalable web and mobile applications using modern frameworks and languages.
• Collaborate closely with product managers, designers, and QA engineers to define product specifications and deliver features on time.
• Write clean, well-documented, and testable code while maintaining high test coverage through unit and integration tests.
• Participate in code reviews, providing constructive feedback to peers and ensuring adherence to engineering standards.
• Troubleshoot, debug, and optimize application performance to ensure a seamless user experience across all devices.
• Contribute to architectural discussions and help guide technical decisions that shape the future of the Side platform.

To be competitive for the Software Engineer position at Side, you should possess a strong technical foundation and a collaborative mindset.

• Must-have skills:

  • Strong proficiency in at least one major programming language (such as JavaScript/TypeScript, Swift, Java, or Python).
  • Solid understanding of computer science fundamentals, including data structures, algorithms, and object-oriented programming.
  • Excellent verbal and written communication skills, with the ability to explain complex technical concepts clearly.
  • Experience working with modern web or mobile frameworks (such as React, Spring Boot, or iOS SDK).
  • Proven ability to write clean, maintainable, and thoroughly tested code.

• Nice-to-have skills:

  • Experience scaling high-traffic applications in cloud environments (such as AWS, GCP, or Azure).
  • Familiarity with test automation frameworks like Selenium, Appium, or Cypress.
  • Experience working in a fast-paced, agile startup environment.
  • Knowledge of real estate technology standards or transaction management workflows.

Q: How difficult is the Software Engineer interview process at Side? A: The process is moderately challenging and highly comprehensive. It balances fundamental computer science topics, such as data structures and algorithms, with practical, role-specific technical assessments and communication evaluations.

Q: What is the purpose of the English and grammar assessment? A: Because Side operates in a highly collaborative, cross-functional, and often distributed environment, clear communication is critical. The language assessment ensures that all engineers can document their code, write technical specifications, and collaborate effectively with team members.

Q: How long does the entire interview process typically take? A: The interview loop generally takes between two to three weeks from the initial HR screen to the final offer stage, depending on scheduling availability and the speed of candidate responses.

Q: Does Side support remote or hybrid work for engineering roles? A: Yes, Side offers flexible working arrangements, including remote and hybrid options, depending on the specific team, role requirements, and location.

To maximize your chances of success during the Side interview process, keep these practical tips in mind:

• Master the Fundamentals: Ensure you have a rock-solid grasp of core language mechanics (such as JavaScript closures, Swift memory management, or Java multithreading) rather than just memorizing framework APIs.

• Over-Communicate Your Thoughts: Treat the coding and system design rounds as a collaborative pairing session. Talk through your approach, state your assumptions, and explain why you are choosing one solution over another.
• Prepare for Behavioral Scenarios: Be ready to share specific examples of how you handled technical disagreements, navigated project ambiguity, or resolved production outages in your past roles.

Securing a Software Engineer role at Side is an exciting opportunity to work on a high-impact platform that is transforming the real estate industry. By focusing your preparation on core computer science fundamentals, platform-specific deep dives, and clear, structured communication, you can navigate the interview loop with confidence.

Take the time to practice coding problems, review your past architectural decisions, and refine your behavioral stories. Focused preparation is the key to demonstrating your full potential to the hiring team.

The salary data above provides an overview of the typical compensation structure for this role. Use this information to guide your expectations during the final HR and offer discussions. For more detailed interview insights, company reviews, and preparation resources, be sure to explore the extensive community data available on Dataford. Good luck with your preparation!