Rokt

Software Engineer

Software EngineerL6AHard

This interview process is for a Software Engineer (L6A) role at Rokt. It is designed to assess a candidate's technical proficiency, problem-solving skills, system design capabilities, and cultural fit within the company.

Rounds

4

Timeline

~14 days

Experience

5 - 10 yrs

Salary Range

US$140000 - US$180000

Total Duration

210 min

Overall Evaluation Criteria

Technical Skills

Technical depth and breadth
Problem-solving approach
System design and architecture skills
Coding proficiency and best practices
Communication and collaboration
Cultural alignment and values

Problem Solving

Ability to break down complex problems
Creativity and innovation in solutions
Logical thinking and reasoning

System Design

Scalability and performance considerations
Fault tolerance and reliability
Trade-off analysis
Clarity and completeness of design

Coding Ability

Cleanliness and efficiency of code
Adherence to coding standards
Testing strategies and implementation
Debugging skills

Communication & Collaboration

Clarity of explanation
Active listening
Ability to articulate technical concepts
Teamwork and collaboration

Cultural Fit

Alignment with Rokt's values
Proactiveness and ownership
Adaptability and learning agility

Preparation Tips

1Review fundamental data structures and algorithms.
2Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte.
3Study system design principles and common architectural patterns.
4Prepare to discuss your past projects in detail, focusing on challenges and solutions.
5Research Rokt's company culture, values, and recent news.
6Understand the e-commerce and ad-tech industries.
7Prepare behavioral questions using the STAR method (Situation, Task, Action, Result).

Study Plan

1

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms fundamentals. Practice 5-10 problems per topic.

Weeks 1-2: Focus on core data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal). Practice implementing these from scratch and analyze their time and space complexity. Aim for at least 5-10 problems per data structure/algorithm type.

2

System Design

Weeks 3-4: System Design principles. Study scalability, databases, caching, and microservices. Practice designing systems.

Weeks 3-4: Dive into system design concepts. Study topics like scalability, load balancing, caching, database design (SQL vs. NoSQL), message queues, and microservices architecture. Read case studies and practice designing common systems like Twitter feed, URL shortener, or a distributed cache.

3

Behavioral and Cultural Fit

Week 5: Behavioral questions preparation. Use STAR method. Research Rokt's values.

Week 5: Prepare for behavioral and situational questions. Reflect on your past experiences and identify examples that demonstrate leadership, teamwork, problem-solving, and handling conflict. Use the STAR method to structure your answers. Research Rokt's values and prepare to discuss how you align with them.

4

Mock Interviews and Review

Week 6: Mock interviews and review. Get feedback and refine answers.

Week 6: Mock interviews and review. Conduct mock interviews with peers or mentors to simulate the actual interview environment. Focus on receiving feedback on your technical explanations, problem-solving approach, and communication. Review areas where you felt less confident.

Commonly Asked Questions

Design a system to handle real-time bidding for online advertisements.
How would you optimize a slow database query?
Describe a time you disagreed with a technical decision. How did you handle it?
What are the trade-offs between monolithic and microservices architectures?
Implement a function to find the k-th largest element in an unsorted array.
How do you approach testing complex distributed systems?
Tell me about a project you are particularly proud of.
What are the challenges of scaling a web application to millions of users?
How would you design a rate limiter for an API?
Describe your experience with CI/CD pipelines.

Location-Based Differences

New York

Interview Focus

Deep understanding of distributed systems and scalability.Experience with cloud platforms (AWS, GCP, Azure).Proficiency in at least one major programming language (e.g., Java, Go, Python).Strong problem-solving and analytical skills.Ability to design and architect complex systems.

Common Questions

How would you design a real-time bidding system for an e-commerce platform?

Discuss a time you had to optimize a complex system for performance. What was your approach?

Describe your experience with distributed systems and consensus algorithms.

How do you approach testing in a microservices environment?

What are your thoughts on the latest trends in cloud-native development?

Tips

Emphasize experience with large-scale systems and cloud infrastructure.
Be prepared to discuss specific examples of challenges faced and solutions implemented.
Showcase your understanding of architectural patterns and trade-offs.
Highlight any contributions to open-source projects or technical leadership roles.
Research Rokt's technology stack and recent product launches.

Sydney

Interview Focus

Strong understanding of data structures and algorithms.Experience with backend development and API design.Familiarity with database technologies (SQL, NoSQL).Ability to write clean, efficient, and well-tested code.Good communication and collaboration skills.

Common Questions

How would you design a recommendation engine for a large e-commerce site?

Describe a challenging debugging scenario you encountered and how you resolved it.

What are the key considerations when designing for high availability and fault tolerance?

Discuss your experience with data pipelines and ETL processes.

How do you ensure code quality and maintainability in a team environment?

Tips

Prepare to whiteboard solutions to algorithmic problems.
Be ready to discuss your thought process and trade-offs for different approaches.
Highlight projects where you've demonstrated strong coding skills and attention to detail.
Showcase your understanding of software development best practices.
Understand Rokt's business model and how engineering contributes to it.

Process Timeline

1
Coding Interview45m
2
System Design Interview60m
3
Behavioral Interview45m
4
Leadership and Vision Interview60m

Interview Rounds

4-step process with detailed breakdown for each round

1

Coding Interview

Coding challenge focused on data structures and algorithms.

Technical Screening (Coding)Medium
45 minSoftware Engineer

This round focuses on your fundamental programming skills. You will be asked to solve one or two coding problems, typically involving data structures and algorithms. The interviewer will assess your ability to write clean, efficient, and correct code, as well as your approach to problem-solving and debugging.

What Interviewers Look For

Solid understanding of data structures and algorithms.Ability to translate a problem into working code.Attention to detail in implementation.Clear communication of thought process.

Evaluation Criteria

Correctness of the solution.
Efficiency of the algorithm (time and space complexity).
Clarity and readability of the code.
Ability to explain the approach and trade-offs.

Questions Asked

Given a binary tree, find its inorder traversal.

TreeRecursionIteration

Implement a function to reverse a linked list.

Linked ListPointers

Find the first non-repeating character in a string.

StringHash Map

Preparation Tips

1Practice coding problems on platforms like LeetCode.
2Be comfortable explaining your code and its complexity.
3Think out loud and communicate your thought process.
4Ask clarifying questions if the problem is unclear.

Common Reasons for Rejection

Inability to articulate thought process clearly.
Lack of understanding of fundamental data structures and algorithms.
Poor coding practices (e.g., no error handling, inefficient code).
2

System Design Interview

Design a scalable system to solve a given problem.

System DesignHard
60 minSenior Software Engineer / Architect

This round assesses your ability to design and architect software systems. You'll be presented with a high-level problem and asked to design a system to solve it, considering aspects like scalability, reliability, and performance. Expect to discuss trade-offs and justify your design decisions.

What Interviewers Look For

Ability to design complex, distributed systems.Understanding of architectural patterns.Consideration of non-functional requirements (scalability, availability, etc.).Pragmatic approach to problem-solving.Ability to communicate complex ideas effectively.

Evaluation Criteria

Scalability of the proposed solution.
Reliability and fault tolerance.
Performance considerations.
Clarity and completeness of the design.
Justification of design choices and trade-offs.

Questions Asked

Design a URL shortening service like bit.ly.

System DesignScalabilityDatabases

Design a distributed cache system.

System DesignDistributed SystemsCaching

How would you design a news feed system?

System DesignScalabilityData Modeling

Preparation Tips

1Study common system design patterns (e.g., load balancing, caching, databases).
2Practice designing systems like Twitter, Uber, or Netflix.
3Be prepared to discuss trade-offs between different technologies and approaches.
4Think about potential bottlenecks and failure points.

Common Reasons for Rejection

Inability to design scalable and robust systems.
Lack of consideration for edge cases and failure scenarios.
Poor understanding of distributed system concepts.
Inability to articulate design choices and trade-offs.
3

Behavioral Interview

Assesses cultural fit, teamwork, and past experiences.

Behavioral And ManagerialMedium
45 minHiring Manager / Team Lead

This round focuses on your behavioral and situational responses. You'll be asked questions about your past experiences, how you handle challenges, work with others, and your motivations. The goal is to understand your personality, work style, and how you would fit into the team and company culture.

What Interviewers Look For

Alignment with Rokt's core values.Ability to work effectively in a team.Proactive and ownership-driven mindset.Good communication and interpersonal skills.Passion for technology and continuous learning.

Evaluation Criteria

Cultural fit with Rokt's values.
Teamwork and collaboration skills.
Problem-solving approach in past experiences.
Communication clarity and effectiveness.
Motivation and career aspirations.

Questions Asked

Tell me about a time you faced a significant technical challenge and how you overcame it.

BehavioralProblem Solving

Describe a situation where you had a conflict with a colleague. How did you resolve it?

BehavioralTeamworkConflict Resolution

What motivates you in your work?

BehavioralMotivation

Preparation Tips

1Prepare examples using the STAR method.
2Research Rokt's company culture and values.
3Be ready to discuss your strengths and weaknesses.
4Think about why you want to work at Rokt.

Common Reasons for Rejection

Lack of alignment with company values.
Poor communication or interpersonal skills.
Inability to provide specific examples for behavioral questions.
Lack of enthusiasm or interest in the role/company.
4

Leadership and Vision Interview

Focuses on strategic thinking, leadership, and business alignment.

Executive / Leadership InterviewHard
60 minDirector of Engineering / VP of Engineering

This final round is typically with a senior leader. It focuses on your strategic thinking, leadership potential, and how you align with the company's vision. Expect questions about your career goals, your approach to technical leadership, and how you can contribute to Rokt's success at a higher level.

What Interviewers Look For

Leadership potential and ability to influence.Strategic thinking and understanding of business impact.Deep technical expertise and ability to mentor others.Proactive approach to identifying and solving problems.Alignment with Rokt's long-term vision.

Evaluation Criteria

Strategic thinking and business acumen.
Ability to lead technical initiatives.
Impact and ownership of past projects.
Understanding of the broader technical landscape.
Potential for growth within the company.

Questions Asked

How would you mentor junior engineers on your team?

LeadershipMentorship

What are the biggest technical challenges facing Rokt in the next 3-5 years?

StrategyVision

Describe a time you had to make a difficult technical decision with incomplete information.

Decision MakingLeadership

Preparation Tips

1Understand Rokt's business strategy and market position.
2Think about how technology drives business value.
3Prepare examples of leadership and mentorship.
4Be ready to discuss your long-term career aspirations.

Common Reasons for Rejection

Lack of strategic thinking.
Inability to connect technical solutions to business goals.
Poor understanding of the company's domain.
Lack of leadership potential or initiative.

Commonly Asked DSA Questions

Frequently asked coding questions at Rokt

View all
Basic CalculatorHARDBasic Calculator IIMEDIUMValid AnagramEASY