Rokt

Software Engineer

Software EngineerL5CMedium to Hard

This interview process is for a Software Engineer (L5C) role at Rokt. It is designed to assess a candidate's technical skills, problem-solving abilities, cultural fit, and potential for growth within the company. The process typically involves multiple rounds, including HR screening, technical interviews, and a final managerial interview.

Rounds

4

Timeline

~14 days

Experience

5 - 8 yrs

Salary Range

US$120000 - US$150000

Total Duration

195 min

Overall Evaluation Criteria

Technical Skills

Technical Proficiency (Coding, Algorithms, Data Structures)
System Design and Architecture Skills
Problem-Solving and Analytical Abilities
Communication and Collaboration Skills
Cultural Fit and Alignment with Rokt's Values
Experience and Domain Knowledge
Leadership Potential and Mentorship Ability

Behavioral and Cultural Fit

Ability to articulate thought process clearly
Active listening skills
Ability to provide constructive feedback
Teamwork and collaboration

Business Acumen and Adaptability

Understanding of business impact of technical decisions
Proactiveness in identifying and solving problems
Adaptability to changing requirements

Preparation Tips

1Review core computer science concepts: data structures, algorithms, complexity analysis.
2Practice coding problems on platforms like LeetCode, HackerRank, focusing on medium to hard difficulty.
3Study system design principles and common patterns (e.g., load balancing, caching, databases, message queues).
4Prepare to discuss your past projects in detail, focusing on your contributions and technical decisions.
5Understand Rokt's business and the ad-tech industry.
6Research common behavioral interview questions and prepare STAR method (Situation, Task, Action, Result) answers.
7Be ready to ask insightful questions about the role, team, and company.

Study Plan

1

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms practice.

Weeks 1-2: Focus on Data Structures (Arrays, Linked Lists, Trees, Graphs, Hash Tables) and Algorithms (Sorting, Searching, Dynamic Programming, Greedy Algorithms). Practice coding these concepts in your preferred language.

2

System Design

Weeks 3-4: System Design principles and patterns.

Weeks 3-4: Deep dive into System Design. Cover topics like scalability, availability, reliability, databases (SQL vs NoSQL), caching strategies, message queues, API design, and microservices architecture. Study common design patterns.

3

Behavioral Preparation

Week 5: Behavioral questions preparation (STAR method).

Week 5: Prepare for behavioral questions. Reflect on your past experiences using the STAR method. Think about examples demonstrating leadership, teamwork, problem-solving, and handling conflict. Research Rokt's values.

4

Project Review and Domain Knowledge

Week 6: Project deep dive and industry research.

Week 6: Review your resume and past projects. Be prepared to discuss them in detail, highlighting technical challenges and solutions. Understand the ad-tech domain and Rokt's business model.

Commonly Asked Questions

Describe a time you had to debug a complex production issue. What was your process?
How would you design a URL shortening service like bit.ly?
What are the trade-offs between SQL and NoSQL databases?
Explain the concept of eventual consistency.
Tell me about a time you disagreed with a technical decision made by your team. How did you handle it?
How do you stay updated with new technologies and trends in software engineering?
Design an API for a simple e-commerce product catalog.
What is your experience with cloud computing platforms (AWS, Azure, GCP)?
How would you optimize the performance of a slow-running database query?
Describe a project where you had to work with a large codebase. How did you navigate it?

Location-Based Differences

Sydney/New York

Interview Focus

System Design and ScalabilityProblem-Solving and Algorithmic ThinkingExperience with distributed systemsLeadership and Mentorship potential

Common Questions

How would you design a system to handle real-time bidding for online advertising?

Describe a complex technical challenge you faced and how you overcame it.

What are your thoughts on microservices architecture and its trade-offs?

How do you approach performance optimization in a large-scale application?

Tell me about a time you had to mentor a junior engineer.

Tips

For Sydney/New York: Emphasize experience with high-throughput, low-latency systems.
For Sydney/New York: Be prepared to discuss specific technologies relevant to ad-tech and e-commerce.
For Sydney/New York: Highlight any experience with cloud platforms like AWS or GCP.
For Sydney/New York: Showcase your ability to work in a fast-paced, agile environment.

Krakow

Interview Focus

Data Structures and AlgorithmsSoftware Development Best PracticesUnderstanding of Machine Learning concepts (if applicable)Communication and Collaboration skills

Common Questions

How would you design a recommendation engine for an e-commerce platform?

Discuss your experience with data structures and algorithms, providing examples.

What are the challenges of working with large datasets?

How do you ensure code quality and maintainability?

Describe a situation where you had to influence a technical decision.

Tips

For Krakow: Focus on strong foundational computer science principles.
For Krakow: Be ready to whiteboard solutions to algorithmic problems.
For Krakow: Demonstrate a solid understanding of object-oriented design.
For Krakow: Highlight your ability to learn new technologies quickly.

Process Timeline

1
HR Screening Call30m
2
Technical Coding Interview60m
3
System Design Interview60m
4
Hiring Manager Interview45m

Interview Rounds

4-step process with detailed breakdown for each round

1

HR Screening Call

An introductory call with HR to assess basic fit and discuss logistics.

HR ScreeningEasy
30 minHR/Recruiter

The initial HR screening call is a brief conversation to understand your background, career aspirations, and motivation for applying to Rokt. The recruiter will assess your general fit with the company culture and the role's requirements. They will also discuss salary expectations and the overall interview process.

What Interviewers Look For

Enthusiasm and passion for technologyAlignment with Rokt's valuesClear communicationBasic understanding of the role

Evaluation Criteria

Cultural fit
Motivation for the role
Basic understanding of the role requirements
Communication clarity

Questions Asked

Tell me about yourself and your career journey so far.

BehavioralIntroduction

Why are you interested in Rokt and this specific role?

BehavioralMotivation

What are your salary expectations?

LogisticsCompensation

What are your strengths and weaknesses?

Behavioral

Preparation Tips

1Research Rokt's mission, values, and recent news.
2Be prepared to talk about your career goals and why you're interested in this specific role.
3Have a clear understanding of your salary expectations.
4Prepare a few questions to ask the recruiter about the company or the role.

Common Reasons for Rejection

Poor communication skills
Lack of enthusiasm or interest in the role/company
Unclear career goals
Mismatched salary expectations
2

Technical Coding Interview

Assess coding skills, data structures, and algorithms through problem-solving.

Technical Interview (Coding)Medium
60 minSoftware Engineer

This round focuses on your core technical skills. You will be asked to solve coding problems, typically involving data structures and algorithms. The interviewer will assess your ability to write clean, efficient code and explain your thought process. Expect questions that test your understanding of time and space complexity.

What Interviewers Look For

Clean, well-structured, and efficient codeStrong grasp of algorithms and data structuresLogical and systematic approach to problem-solvingAbility to communicate technical ideas clearly

Evaluation Criteria

Proficiency in a programming language
Correctness and efficiency of code
Understanding of data structures and algorithms
Problem-solving approach
Ability to explain code and logic

Questions Asked

Given an array of integers, find the contiguous subarray with the largest sum.

ArrayDynamic ProgrammingAlgorithm

Implement a function to reverse a linked list.

Linked ListData StructureAlgorithm

Find the kth smallest element in a binary search tree.

TreeBinary Search TreeData StructureAlgorithm

Write a function to determine if a string is a palindrome, ignoring non-alphanumeric characters and case.

StringAlgorithm

Preparation Tips

1Practice coding problems on platforms like LeetCode, HackerRank, focusing on medium difficulty.
2Review common data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming).
3Be comfortable coding in your preferred language and explaining your solution.
4Practice thinking out loud and explaining your approach before and during coding.

Common Reasons for Rejection

Inability to solve coding problems efficiently
Poor understanding of fundamental data structures and algorithms
Code quality issues (e.g., unreadable, inefficient)
Difficulty explaining thought process
3

System Design Interview

Assess system design skills for scalable and distributed applications.

Technical Interview (System Design)Hard
60 minSenior Software Engineer / Architect

This round evaluates your ability to design scalable and robust systems. You'll be presented with a high-level problem (e.g., design Twitter, design a URL shortener) and expected to break it down, discuss requirements, propose a high-level design, and then dive deeper into specific components. Focus on trade-offs, scalability, and reliability.

What Interviewers Look For

Ability to design complex systems from scratchUnderstanding of distributed system challengesSound reasoning for design choicesConsideration of various aspects like performance, cost, and maintainability

Evaluation Criteria

System design capabilities
Understanding of scalability, availability, and reliability
Knowledge of distributed systems concepts
Ability to analyze trade-offs
Creativity in problem-solving

Questions Asked

Design a system like TinyURL.

System DesignScalabilityAPI Design

Design a news feed system similar to Facebook's.

System DesignScalabilityDistributed Systems

How would you design a rate limiter?

System DesignScalabilityConcurrency

Design a system to count unique visitors to a website in real-time.

System DesignScalabilityData Processing

Preparation Tips

1Study system design concepts: load balancing, caching, databases (SQL/NoSQL), message queues, CDNs.
2Practice designing common systems like social media feeds, e-commerce platforms, or ride-sharing apps.
3Understand CAP theorem and consistency models.
4Be prepared to discuss trade-offs between different design choices.
5Think about potential bottlenecks and how to address them.

Common Reasons for Rejection

Lack of understanding of system design principles
Inability to handle scale and distributed systems concepts
Poor trade-off analysis
Difficulty designing robust and scalable solutions
4

Hiring Manager Interview

Assess team fit, behavioral competencies, and career aspirations with the hiring manager.

Managerial / Behavioral InterviewMedium
45 minHiring Manager

The hiring manager interview focuses on your experience, career goals, and how you would fit into the team and Rokt's culture. They will ask behavioral questions to understand your past experiences, how you handle challenges, and your leadership potential. This is also an opportunity for you to ask questions about the team, projects, and career growth.

What Interviewers Look For

Ability to work effectively in a teamProactive attitude and ownershipGood communication and interpersonal skillsAlignment with Rokt's values and culturePotential for growth and impact

Evaluation Criteria

Teamwork and collaboration
Problem-solving approach in a team context
Leadership potential
Cultural alignment
Motivation and passion

Questions Asked

Tell me about a time you had to lead a project or initiative. What was the outcome?

BehavioralLeadership

Describe a situation where you had to deal with a difficult team member. How did you handle it?

BehavioralTeamworkConflict Resolution

How do you prioritize your work when faced with multiple competing tasks?

BehavioralTime Management

What are you looking for in your next role and team?

BehavioralMotivation

Preparation Tips

1Reflect on your past projects and experiences, focusing on achievements and learnings.
2Prepare answers to common behavioral questions using the STAR method.
3Think about your career goals and how this role aligns with them.
4Research Rokt's culture and values.
5Prepare thoughtful questions to ask the hiring manager.

Common Reasons for Rejection

Poor alignment with team dynamics
Lack of ownership or accountability
Difficulty collaborating or communicating with peers
Not demonstrating leadership potential or growth mindset

Commonly Asked DSA Questions

Frequently asked coding questions at Rokt

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