People Software Engineer interview questions & guide 2026

The following questions are compiled from real interview experiences at People. While your specific questions will depend on your target team and seniority level, these examples highlight the common patterns, technical competencies, and behavioral traits that interviewers prioritize.

Coding & Data Structures

This category evaluates your fundamental computer science knowledge, problem-solving efficiency, and ability to translate logic into clean, working code.

• Implement a basic queue using stacks, and discuss the time complexity of your operations.
• Write a function to reverse a singly linked list in-place.

Preparing for an interview at People requires a balanced approach that showcases both your deep technical execution and your high-level system thinking. The engineering team values candidates who are pragmatic problem solvers, clear communicators, and collaborative teammates.

Role-Related Knowledge – You must demonstrate a strong command of your primary stack (whether frontend, backend, or full-stack). Interviewers will evaluate your understanding of language-specific best practices, framework mechanics, and fundamental data structures.

System Design & Scalability – For mid-to-senior roles, your ability to architect scalable systems is critical. You will be evaluated on how effectively you handle high-traffic scenarios, implement caching strategies, and reason about system trade-offs.

Problem-Solving Ability – Whether tackling a live coding challenge or discussing a past project, you should demonstrate a structured, analytical approach. Interviewers want to see how you break down complex, ambiguous problems into manageable, logical steps.

Collaboration & Product Mindset – People values engineers who think like product owners. You should show a keen interest in how your technical decisions impact the end-user experience and how you collaborate with product managers and other cross-functional stakeholders.

The interview process for a Software Engineer at People is structured to evaluate your technical capabilities, architectural thinking, and cultural alignment. While the exact steps can vary slightly depending on the specific team and seniority level, the overall sequence is designed to be comprehensive and highly collaborative.

The journey typically begins with an initial recruiter screen to discuss your background and align on mutual expectations. This is followed by a conversation with the hiring manager to assess your high-level technical experience and behavioral fit. Depending on the team, you may then be assigned a practical technical assessment—either a take-home project or a live coding session—focused on real-world engineering tasks rather than abstract algorithmic puzzles.

The final stages consist of a deep-dive technical round, a system design discussion, and conversations with key product stakeholders and engineering directors. Throughout the process, the engineering team aims to create a supportive environment where you can showcase your practical problem-solving skills and discuss how you approach complex technical challenges.

The visual timeline above outlines the typical progression from the initial application screen to the final round interviews. Candidates should use this sequence to pace their preparation, focusing first on core coding and role-specific knowledge before moving on to system design and behavioral exercises. While the entire process is thorough, maintaining consistent communication with your recruiter will help you navigate each stage smoothly.

To succeed in the Software Engineer interview loop, you must understand the specific areas where the engineering team will focus their evaluation.

Practical Coding & Technical Execution

This area evaluates your ability to write clean, maintainable, and efficient code under realistic constraints. Rather than focusing solely on competitive programming puzzles, People emphasizes practical engineering skills, such as manipulating data, building APIs, and working with modern web technologies.

Be ready to go over:

• Data Structure Fundamentals – Practical application of arrays, stacks, queues, and linked lists in everyday coding tasks.
• Frontend Manipulation & DOM – For frontend-focused roles, manipulating HTML, CSS, and JavaScript using modern tools or templating engines.
• API & Tool Development – Designing robust REST endpoints, handling request/response lifecycles, and creating command-line tools.
• Advanced concepts (less common) – Specialized templating engines like Swig, custom middleware implementation, and advanced microservices communication protocols.

Example scenarios:

• "You are given a live CodePen session and asked to dynamically render a list of media articles using vanilla JavaScript and a basic template."
• "Build a functional CLI tool in Go that interacts with a local REST API to log and retrieve ad-tech performance metrics."

System Design & Architecture

For mid-to-senior engineering roles, the system design round is a critical component of the evaluation. Interviewers want to see how you approach high-level architecture, manage data flow, and optimize performance for high-traffic applications.

Be ready to go over:

• Retrospective Architecture Analysis – Walking through a system you previously designed, highlighting key decisions and lessons learned.
• Caching & Distributed Systems – Implementing local and distributed caching strategies to reduce latency and database load.
• Scalable Data Ingestion – Designing pipelines that can handle high volumes of concurrent requests without data loss.
• Advanced concepts (less common) – Multi-region database replication, event-driven architectures, and high-availability failover strategies.

Example scenarios:

• "Describe the architecture of a complex application you deployed in a previous role. Looking back, what bottlenecks did you encounter, and how would you redesign it today?"
• "How would you design an asset-delivery system that serves millions of static and dynamic media files daily with minimal latency?"

Behavioral & Cross-Functional Collaboration

Technical skills are only part of the equation; People highly values engineers who can collaborate effectively across teams, communicate complex ideas clearly, and align their work with business goals.

Be ready to go over:

• Working with Product Management – How you align technical timelines with product roadmaps and negotiate feature scope.
• Handling Ambiguity – Navigating project requirements that are not fully defined and making pragmatic technical decisions.
• Conflict Resolution – Managing technical disagreements within your team constructively and aligning on a path forward.
• Advanced concepts (less common) – Mentoring junior engineers, driving engineering-wide best practices, and managing stakeholder expectations during system outages.

Example scenarios:

• "Tell me about a time you had to work closely with a Product Manager to scale back a feature's technical complexity while still delivering key business value."
• "Describe a situation where you had to quickly learn a new framework or tool to unblock a critical project deliverable."

As a Software Engineer at People, your daily responsibilities will span the entire software development lifecycle, from initial architectural planning to writing code, testing, deployment, and monitoring. You will be responsible for building and maintaining the core services, user-facing applications, and developer tooling that power the company's digital portfolio.

Collaboration is at the heart of the role. You will work closely with Product Managers, designers, and other engineering teams to translate business requirements into robust, scalable technical solutions. This involves participating in sprint planning, conducting comprehensive code reviews, and contributing to technical documentation to ensure high-quality standards across the codebase.

Depending on your team, you may focus on optimizing backend Go services for ad-tech platforms, refining highly interactive frontend experiences, or managing cloud infrastructure. Regardless of the specific domain, you will be expected to monitor application performance, troubleshoot production issues, and continuously identify opportunities to refactor and improve system efficiency.

To be competitive for a Software Engineer position at People, you should possess a strong foundation in computer science and practical experience building production-grade software.

• Must-have skills – Proficiency in at least one major programming language (such as Java, Go, or JavaScript/TypeScript). Solid understanding of core data structures, algorithms, and object-oriented or functional programming principles. Experience designing and consuming RESTful APIs and working with relational or non-relational databases.
• Nice-to-have skills – Familiarity with frontend templating engines, cloud infrastructure (AWS/GCP), containerization (Docker/Kubernetes), or machine learning pipelines. Experience working with high-traffic distributed systems and caching layers (Redis/Memcached) is highly advantageous.
• Experience level – Typically requires a bachelor's degree in Computer Science or a related field, or equivalent practical experience. Senior-level roles generally require 5+ years of professional software engineering experience, with a proven track record of leading technical projects and mentoring team members.
• Soft skills – Strong communication skills, a proactive and collaborative mindset, and the ability to explain complex technical concepts to non-technical stakeholders.

Q: How difficult is the Software Engineer interview process at People? The interview process is generally rated as average to difficult, depending on the seniority of the role. While the coding challenges focus on practical engineering rather than abstract competitive programming, the system design and deep-dive technical rounds are highly rigorous and require a strong grasp of architectural trade-offs.

Q: What is the typical timeline for the hiring process? The timeline can vary, but most candidates complete the process within three to six weeks. This includes the initial recruiter screen, technical assessments, and the final round interviews with engineering and product leadership.

Q: Are the technical assessments timed, and can I use external resources? Take-home assessments are typically untimed to respect your schedule, while live coding sessions are conducted in collaborative environments (like CodePen). During live coding, interviewers generally permit the use of Google to look up syntax, as they are more interested in your logical approach than rote memorization.

Q: Does People offer remote work opportunities for software engineering roles? Yes, many software engineering positions at People are fully remote within the United States, offering competitive salary ranges tailored to experience and location.

To help you perform your best, keep these practical, insider tips in mind as you prepare for your interviews:

• Clarify requirements early: During coding and system design rounds, never jump straight into writing code or drawing diagrams. Spend the first few minutes asking clarifying questions to define the scope, expected scale, and constraints of the problem.
• Review your past architecture: Be ready to discuss a previous project in meticulous detail. Know why you chose specific technologies, what challenges you faced, and what you would do differently if you had to rebuild it today.
• Practice clean, modular coding: Whether in a take-home test or a live coding session, focus on writing readable, modular code. Use descriptive variable names, handle edge cases, and structure your logic so it is easy for another engineer to follow.

• Demonstrate a product mindset: Throughout your conversations, show that you care about the "why" behind the code. Highlight how your technical decisions align with user experience, business goals, and product performance.

Joining People as a Software Engineer offers an exciting opportunity to work on high-impact projects, solve complex scalability challenges, and contribute to platforms that reach millions of users daily. The engineering culture values practical problem-solving, continuous learning, and close cross-functional collaboration.

As you prepare, focus your energy on mastering core language concepts, reviewing system design fundamentals (particularly caching and API design), and practicing structured communication for your behavioral rounds. A methodical, well-prepared approach will help you stand out and demonstrate your readiness to contribute to the team's success.

To gain deeper insights, review detailed interview timelines, and explore more real-world candidate experiences, visit Dataford to continue your preparation.

The salary data above outlines the typical compensation ranges for engineering roles at People. Candidates should interpret these ranges based on their target seniority, location, and specific technical domain, such as machine learning or infrastructure engineering.