Known Software Engineer interview questions & guide 2026

To help you prepare effectively, we have categorized representative questions based on real interview experiences at Known. These questions highlight key patterns in what the hiring team evaluates, ranging from core coding capabilities to product-focused problem-solving.

React & Frontend Engineering

These questions evaluate your understanding of modern frontend development, component architecture, state management, and performance optimization, particularly for product-focused engineering roles.

• Explain how you manage complex state across a large-scale React application.
• How do you optimize a React application that is experiencing rendering bottlenecks when handling real-time data streams?

Preparing for an interview at Known requires a balanced approach. You must demonstrate sharp technical execution while also showing that you can think like a product owner. The hiring team values engineers who do not just write code, but who understand the broader business context of their work.

Role-Related Knowledge – You must show deep expertise in your primary domain, whether that is frontend development with React or backend systems engineering. Interviewers will look for a solid grasp of modern language features, framework performance, and clean code practices.

Problem-Solving & Adaptability – The technical challenges at Known are often open-ended. You will be evaluated on how you break down complex, ambiguous problems, structure your code, and make deliberate technical trade-offs under time constraints.

Execution & Attention to Detail – Beyond writing working code, you are expected to understand the operational side of your software. This includes knowing how to configure your application, manage settings files, write tests, and ensure your solution can be reliably deployed.

Collaboration & Culture Fit – As an engineer, you will collaborate across diverse teams. You should be prepared to discuss how you communicate technical concepts, receive feedback, and align your technical goals with the company's overall product strategy.

The interview process at Known is designed to evaluate both your immediate technical capabilities and your long-term potential to contribute to their engineering culture. Candidates can expect a structured progression that moves from high-level screening to deep technical evaluation.

The process typically begins with an initial recruiter phone call to align on your background, career goals, and compensation expectations. Following a successful screen, you will move to a 30-minute tech lead meeting where you will discuss your past experiences, technical preferences, and the specific requirements of the team. This is a conversational session aimed at assessing mutual alignment and high-level technical depth.

The core of the evaluation is a 90-minute technical deep dive. This session is highly practical and hands-on, focusing on real-world engineering scenarios. You will be asked to write code, solve problems, and potentially configure settings or environment files to make your solution fully operational. Managing your time during this intensive session is critical to your success.

The timeline above outlines the standard progression for software engineering candidates. It is designed to move efficiently from initial contact to a final decision, ensuring both you and the hiring team have a clear understanding of alignment. Candidates should use this timeline to pace their preparation, focusing heavily on coding readiness and system design principles prior to the deep dive stage.

To excel in the technical stages, you need to understand exactly what Known's engineering team looks for during your evaluations. The technical interviews are designed to simulate actual day-to-day engineering challenges.

Practical Coding & Configuration

This evaluation area focuses on your ability to write clean, production-ready code and configure it correctly. The interviewers want to see that you can take a problem from concept to execution, including the final details required to make the application run.

Be ready to go over:

• Code Organization – How you structure your files, modules, and functions for readability and maintainability.

As a Software Engineer at Known, your day-to-day work will involve a mix of product development, system optimization, and cross-functional collaboration. You will be expected to take ownership of your code from design through to deployment.

You will spend a significant portion of your time designing and implementing new features for Known's proprietary platform. This includes writing clean, well-tested code in languages like JavaScript, TypeScript, or Python, and ensuring that your frontend implementations align perfectly with backend APIs. You will also collaborate with product managers to refine feature requirements and with UI/UX designers to ensure a seamless user experience.

In addition to feature development, you will be responsible for maintaining the health and performance of the engineering ecosystem. This means participating in code reviews to maintain high quality standards, optimizing application performance, and troubleshooting production issues. You will also work closely with data engineering and data science teams to integrate advanced models and data sources into consumer-facing applications, ensuring that data flows smoothly and securely across the platform.

To be competitive for a Software Engineer position at Known, you must demonstrate a strong technical foundation combined with practical, hands-on experience. The hiring team looks for candidates who can immediately contribute to their product roadmap.

• Must-have skills – Strong proficiency in JavaScript/TypeScript and modern frontend frameworks, particularly React (especially for product engineering roles). Solid understanding of HTML5, CSS3, and responsive design principles. Experience with backend technologies (such as Node.js, Python, or Go) and database systems (SQL and NoSQL). Familiarity with version control (Git) and modern build/deployment pipelines.
• Nice-to-have skills – Experience in the advertising technology (ad-tech) or marketing technology industries. Familiarity with cloud infrastructure platforms (AWS, GCP) and containerization tools like Docker. Knowledge of data pipeline tools and large-scale data processing frameworks.
• Experience level – Typically 3+ years of professional software engineering experience for mid-level roles, and 6+ years for senior-level positions, with a proven track record of shipping production-grade software.
• Soft skills – Strong communication skills with the ability to articulate technical concepts to non-technical stakeholders. A proactive, collaborative mindset and the ability to thrive in a fast-paced environment with ambiguous requirements.

Q: What is the typical timeline for the interview process at Known? A: The entire process generally takes between 2 to 4 weeks, depending on interviewer availability and the candidate's schedule. Known aims to move candidates through the stages efficiently, though communication turnaround times can occasionally vary.

Q: How technical is the 90-minute technical deep dive? A: It is highly technical and hands-on. You will be expected to write actual code, solve structural problems, and configure environment settings. It is designed to mimic real-world development tasks rather than purely theoretical algorithmic puzzles.

Q: What sets successful candidates apart during the interviews? A: Successful candidates demonstrate not only strong coding skills but also a high degree of pragmatism. They communicate their thought process clearly, ask clarifying questions before writing code, and show that they care about the operational details, such as configuration and testing.

Q: Is there flexibility in the choice of programming languages during the coding assessments? A: For general software engineering roles, there is typically flexibility, though JavaScript and TypeScript are highly preferred, especially for frontend or full-stack positions. For specialized roles like a Product Engineer, React, you will be expected to complete the coding exercises using React and modern JavaScript.

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

• Manage your time actively during the deep dive: The 90-minute technical deep dive is comprehensive. Keep track of the time and ensure you do not get stuck on a single optimization. It is better to have a fully working solution with minor configuration needs than an incomplete algorithm.
• Verify your environment beforehand: Ensure your local development environment, IDE, and build tools are fully updated and functional before the technical interview. Having a smooth setup prevents unnecessary stress and technical delays during live coding.
• Communicate your design trade-offs: Whenever you make a technical decision, explain why you chose that approach. Discussing the pros and cons of your chosen architecture or state management strategy shows maturity and depth as an engineer.

• Focus on configuration as well as code: Do not neglect the settings or configuration files. Real-world applications rely heavily on correct environments, and demonstrating that you can configure your application properly is highly valued by the engineering team.

A Software Engineer role at Known offers an exciting opportunity to build impactful technology at the intersection of media, data science, and creative engineering. By working on complex, high-scale products, you will play a direct role in driving the technical innovation of a leading modern marketing agency. The work is challenging, highly collaborative, and deeply rewarding for engineers who love solving real-world product problems.

To prepare effectively, focus your energy on mastering core coding patterns, refining your system design skills, and ensuring you can write clean, configurable code under realistic conditions. Practicing your communication and structuring your past experiences using the STAR method will also ensure you stand out during the behavioral and technical discussion phases.

For additional community insights, real-world candidate experiences, and salary benchmarks to help you navigate your preparation, explore the resources available on Dataford.

The salary ranges shown above reflect the competitive compensation offered at Known. The range for a Software Engineer in New York typically spans $100,000 to $130,000 USD, while a specialized Product Engineer, React role in San Francisco ranges from $150,000 to $200,000 USD. When preparing for offer discussions, consider how your specific domain expertise, years of experience, and location align with these benchmarks.