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Samsung Ads Software Engineer Interview Guide

Samsung Ads Software Engineer interview guide: reported rounds, questions and how candidates describe the process.

The 60-second brief

As a Software Engineer at Samsung Ads, you will build the scalable infrastructure, data pipelines, and high-performance applications that power advertising ecosystems across hundreds of millions of Smart TVs and connected devices globally. Working at the intersection of media, big data, and hardware integration, engineers at Samsung Ads design systems capable of handling massive telemetry ingestion, real-time ad decisioning, and seamless application performance. The role demands a balance of algorithmic rigor, low-latency system architecture, and deep practical knowledge of modern software development practices. Whether you are optimizing data structures for high-throughput messaging, building resilient backend microservices, or refining frontend application performance, your work directly impacts millions of active daily users and critical revenue channels.

This guide is scoped to a Software Engineer candidate at Samsung Ads.

Focus areas

  • Data Structures & Algorithms (DSA)
  • Problem Solving
  • Graph Algorithms

The Samsung Ads interview process

Samsung Ads candidates report 5 rounds over 4-6 weeks. The stages below are what candidates describe, not a published process.

HR Screening Call

Initial call to discuss your background, experience, and alignment with the role.

What to demonstrate

  • Initial call to discuss your background, experience, and alignment with the role
  • Depth in Data Structures & Algorithms (DSA)

How to prepare

  • Be able to walk your CV end to end in two minutes, and say why this company specifically.
  • Have your salary expectations, notice period and location constraints ready, and ask for the rest of the loop in writing.

Online Assessment

Rigorous assessment on a platform like HackerRank to test algorithmic problem-solving skills.

What to demonstrate

  • Rigorous assessment on a platform like HackerRank to test algorithmic problem-solving skills
  • Depth in Data Structures & Algorithms (DSA)

How to prepare

  • Answer aloud and timed: Given a directed graph, perform a topological sort to find a valid dependency execution order.
  • Answer aloud and timed: Implement Breadth-First Search (BFS) and Depth-First Search (DFS) to traverse a matrix and find connected components.

Technical Rounds

Includes live coding, system design discussions, and deep dives into computer science fundamentals.

What to demonstrate

  • Includes live coding, system design discussions, and deep dives into computer science fundamentals
  • Depth in Data Structures & Algorithms (DSA)

How to prepare

  • Answer aloud and timed: Solve a classic 0/1 Knapsack optimization problem using dynamic programming.
  • Answer aloud and timed: How would you design a high-throughput platform to process and serve media streaming assets globally?

Managerial Interviews

Focus on behavioral fit, leadership potential, and alignment with the company's culture.

What to demonstrate

  • Focus on behavioral fit, leadership potential, and alignment with the company's culture
  • Depth in Data Structures & Algorithms (DSA)

How to prepare

  • Answer aloud and timed: Explain the key architectural differences between heap and stack memory allocation in multi-threaded environments.
  • Answer aloud and timed: Write a SQL query utilizing complex JOIN operations and aggregation functions to isolate duplicates in a large dataset.

Executive Interviews

Final interviews assessing overall fit within the company culture.

What to demonstrate

  • Final interviews assessing overall fit within the company culture
  • Depth in Data Structures & Algorithms (DSA)

How to prepare

  • Answer aloud and timed: Describe how operating system concepts like paging, page faults, and deadlocks impact process execution and performance.
  • Answer aloud and timed: Explain the core networking mechanics behind DHCP, routing tables, and DNS resolution in distributed microservices.

Where candidates lose points

Master the fundamentals

Review core computer science concepts thoroughly. Be ready to explain memory management, thread synchronization, paging, deadlocks, and network protocols in direct technical terms.

Practice explicit problem decomposition

When solving algorithmic problems, communicate your thoughts continuously. State your approach, evaluate time and space complexity upfront, discuss edge cases, and walk through your solution with sample test cases before writing code.

Know your resume intimately

Be prepared for cross-examination on every technology, project, and claim listed on your resume. Interviewers will ask deep questions about your personal contributions, design choices, and bug resolution experiences.

Questions & practice

Given a singly linked list, write a function to detect if a cycle exists.

Medium · Algorithms & Data Structures

Approach

  1. Restate the input: its shape, its size, and what is guaranteed about it.
  2. Name the brute-force solution and its complexity before improving on it.
  3. Choose the data structure from the access pattern, not from familiarity.
  4. State the target complexity and say which constraint rules the naive version out.

Follow-up

  • How does this change if the input no longer fits in memory?
  • What is the worst case, and how likely is it on real data?

Implement an algorithm to remove duplicate nodes from an unsorted linked list in place.

Medium · Algorithms & Data Structures

Approach

  1. Restate the input: its shape, its size, and what is guaranteed about it.
  2. Name the brute-force solution and its complexity before improving on it.
  3. Choose the data structure from the access pattern, not from familiarity.
  4. State the target complexity and say which constraint rules the naive version out.

Follow-up

  • How does this change if the input no longer fits in memory?
  • What is the worst case, and how likely is it on real data?

Given a directed graph, perform a topological sort to find a valid dependency execution order.

Medium · Algorithms & Data Structures

Approach

  1. Restate the input: its shape, its size, and what is guaranteed about it.
  2. Name the brute-force solution and its complexity before improving on it.
  3. Choose the data structure from the access pattern, not from familiarity.
  4. State the target complexity and say which constraint rules the naive version out.

Follow-up

  • How does this change if the input no longer fits in memory?
  • What is the worst case, and how likely is it on real data?

Implement Breadth-First Search (BFS) and Depth-First Search (DFS) to traverse a matrix and find connected comp

Medium · Algorithms & Data Structures

Implement Breadth-First Search (BFS) and Depth-First Search (DFS) to traverse a matrix and find connected components.

Approach

  1. Restate the input: its shape, its size, and what is guaranteed about it.
  2. Name the brute-force solution and its complexity before improving on it.
  3. Choose the data structure from the access pattern, not from familiarity.
  4. State the target complexity and say which constraint rules the naive version out.

Follow-up

  • How does this change if the input no longer fits in memory?
  • What is the worst case, and how likely is it on real data?

Solve a classic 0/1 Knapsack optimization problem using dynamic programming.

Medium · Algorithms & Data Structures

Approach

  1. Restate the input: its shape, its size, and what is guaranteed about it.
  2. Name the brute-force solution and its complexity before improving on it.
  3. Choose the data structure from the access pattern, not from familiarity.
  4. State the target complexity and say which constraint rules the naive version out.

Follow-up

  • How does this change if the input no longer fits in memory?
  • What is the worst case, and how likely is it on real data?

Explain the key architectural differences between heap and stack memory allocation in multi-threaded environme

Medium · Systems, Architecture & SQL

Explain the key architectural differences between heap and stack memory allocation in multi-threaded environments.

Approach

  1. Say what the runtime actually does before reasoning about the code.
  2. Name what is shared across threads and what owns each piece of state.
  3. Identify the window where an invariant is briefly untrue.
  4. Distinguish a value from a reference to it, and say which one you handed out.

Follow-up

  • What happens if two callers reach this at the same time?
  • Where could this allocate more than you expect?

What are the core differences between C++ and Python in terms of memory management, execution speed, and garba

Medium · Domain Fundamentals & Frameworks

What are the core differences between C++ and Python in terms of memory management, execution speed, and garbage collection?

Approach

  1. Say what the runtime actually does before reasoning about the code.
  2. Name what is shared across threads and what owns each piece of state.
  3. Identify the window where an invariant is briefly untrue.
  4. Distinguish a value from a reference to it, and say which one you handed out.

Follow-up

  • What happens if two callers reach this at the same time?
  • Where could this allocate more than you expect?

Write a SQL query utilizing complex JOIN operations and aggregation functions to isolate duplicates in a large

Medium · Systems, Architecture & SQL

Write a SQL query utilizing complex JOIN operations and aggregation functions to isolate duplicates in a large dataset.

Approach

  1. Name the grain you start from and join outward from it.
  2. Check whether any join is one-to-many before aggregating, or the sums inflate.
  3. Say which index the query would use, and what makes it unusable.
  4. Handle the rows that do not match: that is usually the actual question.

Follow-up

  • How does the query change if that join becomes one-to-many?
  • What happens to this when the table is ten times larger?

Why do you specifically want to join Samsung Ads, and how does your background align with our technology stack

Medium · Behavioral & Leadership

Why do you specifically want to join Samsung Ads, and how does your background align with our technology stack?

Approach

  1. Name the grain you start from and join outward from it.
  2. Check whether any join is one-to-many before aggregating, or the sums inflate.
  3. Say which index the query would use, and what makes it unusable.
  4. Handle the rows that do not match: that is usually the actual question.

Follow-up

  • How does the query change if that join becomes one-to-many?
  • What happens to this when the table is ten times larger?

How would you design a high-throughput platform to process and serve media streaming assets globally?

Medium · Systems, Architecture & SQL

Approach

  1. Fix the scope first: who calls this, how often, and what they do when it fails.
  2. Name the read and write paths separately; they rarely have the same bottleneck.
  3. Choose a partition key and say what query it makes expensive.
  4. State the consistency you need, and where you are willing to be stale.

Follow-up

  • What breaks first when traffic grows ten times?
  • How does this behave when that dependency is down for an hour?

Explain the core networking mechanics behind DHCP, routing tables, and DNS resolution in distributed microserv

Medium · Systems, Architecture & SQL

Explain the core networking mechanics behind DHCP, routing tables, and DNS resolution in distributed microservices.

Approach

  1. Fix the scope first: who calls this, how often, and what they do when it fails.
  2. Name the read and write paths separately; they rarely have the same bottleneck.
  3. Choose a partition key and say what query it makes expensive.
  4. State the consistency you need, and where you are willing to be stale.

Follow-up

  • What breaks first when traffic grows ten times?
  • How does this behave when that dependency is down for an hour?

Explain the primary design principles of Object-Oriented Programming (OOP) and how you enforce abstraction and

Medium · Domain Fundamentals & Frameworks

Explain the primary design principles of Object-Oriented Programming (OOP) and how you enforce abstraction and encapsulation.

Approach

  1. Clarify what is being asked and what a complete answer contains.
  2. State your assumptions explicitly before working the problem.
  3. Say what you would check first and why it is the highest-information step.
  4. Work from the requirement backwards to the design.

Follow-up

  • What assumption would you test first?
  • How would you know your answer was wrong?

How do you optimize web application performance, manage state, and resolve rendering bottlenecks in frontend i

Medium · Domain Fundamentals & Frameworks

How do you optimize web application performance, manage state, and resolve rendering bottlenecks in frontend interfaces?

Approach

  1. Clarify what is being asked and what a complete answer contains.
  2. State your assumptions explicitly before working the problem.
  3. Say what you would check first and why it is the highest-information step.
  4. Work from the requirement backwards to the design.

Follow-up

  • What assumption would you test first?
  • How would you know your answer was wrong?

Describe the core concepts of modern observability, including structured logging, distributed tracing, and met

Medium · Domain Fundamentals & Frameworks

Describe the core concepts of modern observability, including structured logging, distributed tracing, and metrics collection.

Approach

  1. Fix the scope first: who calls this, how often, and what they do when it fails.
  2. Name the read and write paths separately; they rarely have the same bottleneck.
  3. Choose a partition key and say what query it makes expensive.
  4. State the consistency you need, and where you are willing to be stale.

Follow-up

  • What breaks first when traffic grows ten times?
  • How does this behave when that dependency is down for an hour?

How do you construct and manage CI/CD pipelines to ensure seamless automated deployments across staging and pr

Medium · Domain Fundamentals & Frameworks

How do you construct and manage CI/CD pipelines to ensure seamless automated deployments across staging and production environments?

Approach

  1. Clarify what is being asked and what a complete answer contains.
  2. State your assumptions explicitly before working the problem.
  3. Say what you would check first and why it is the highest-information step.
  4. Work from the requirement backwards to the design.

Follow-up

  • What assumption would you test first?
  • How would you know your answer was wrong?

Describe how operating system concepts like paging, page faults, and deadlocks impact process execution and pe

Medium · Systems, Architecture & SQL

Describe how operating system concepts like paging, page faults, and deadlocks impact process execution and performance.

Approach

  1. Establish what changed and when, before forming any theory.
  2. Pick a bisection that eliminates candidates whichever way it turns out.
  3. Check the instrumentation before believing the symptom.
  4. Separate the trigger from the cause; the deploy is rarely the bug.

Follow-up

  • What would you look at first, and what would it rule out?
  • How would you tell a cause from a coincidence here?

Suggested practice checklist

Built from the rounds and topics Samsung Ads candidates report.

Day 1 — Map the Samsung Ads loop

  • Write out the reported sequence: HR Screening Call, Online Assessment, Technical Rounds, Managerial Interviews, Executive Interviews.
  • For each round, write one sentence on what it is judging, from the description above, and mark the one you are least ready for.

Deliverable: A one-page map of the 5 reported rounds, with the weakest marked.

Day 2 — Work Data Structures & Algorithms (DSA)

  • Spend the session on Data Structures & Algorithms (DSA), which Samsung Ads candidates report being tested on.
  • Write one worked example in Data Structures & Algorithms (DSA) and time yourself on it.

Deliverable: One timed worked example in Data Structures & Algorithms (DSA).

Day 3 — Work Problem Solving

  • Spend the session on Problem Solving, which Samsung Ads candidates report being tested on.
  • Write one worked example in Problem Solving and time yourself on it.

Deliverable: One timed worked example in Problem Solving.

Day 4 — Work Graph Algorithms

  • Spend the session on Graph Algorithms, which Samsung Ads candidates report being tested on.
  • Write one worked example in Graph Algorithms and time yourself on it.

Deliverable: One timed worked example in Graph Algorithms.

Day 5 — Answer out loud: Algorithms & Data Structures

  • Answer aloud, timed: Given a singly linked list, write a function to detect if a cycle exists.
  • Answer aloud, timed: Implement an algorithm to remove duplicate nodes from an unsorted linked list in place.

Deliverable: Spoken answers to 2 reported Algorithms & Data Structures question(s), under time.

Day 6 — Answer out loud: Systems, Architecture & SQL

  • Answer aloud, timed: How would you design a high-throughput platform to process and serve media streaming assets globally?
  • Answer aloud, timed: Explain the key architectural differences between heap and stack memory allocation in multi-threaded environments.

Deliverable: Spoken answers to 2 reported Systems, Architecture & SQL question(s), under time.

Day 7 — Answer out loud: Domain Fundamentals & Frameworks

  • Answer aloud, timed: What are the core differences between C++ and Python in terms of memory management, execution speed, and garbage collection?
  • Answer aloud, timed: Explain the primary design principles of Object-Oriented Programming (OOP) and how you enforce abstraction and encapsulation.

Deliverable: Spoken answers to 2 reported Domain Fundamentals & Frameworks question(s), under time.

Behavioural preparation

Behavioural rounds judge the decision you made and what it cost.

Walk me through the most technically complex project listed on your resume, detailing your specific contributi

Medium · Behavioral & Leadership

Walk me through the most technically complex project listed on your resume, detailing your specific contributions and design choices.

Approach

  1. Pick a story where you made the decision, not one where you watched it.
  2. State the situation in two sentences and spend the rest on the reasoning.
  3. Give the blast radius: what could have broken, and what you measured.
  4. Name the disagreement and how you resolved it with evidence.

Follow-up

  • What would you do differently if you ran that again?
  • How did you know your change caused the improvement?

Describe a situation where you experienced a major technical conflict or disagreement during a group project.

Medium · Behavioral & Leadership

Describe a situation where you experienced a major technical conflict or disagreement during a group project. How did you resolve it?

Approach

  1. Pick a story where you made the decision, not one where you watched it.
  2. State the situation in two sentences and spend the rest on the reasoning.
  3. Give the blast radius: what could have broken, and what you measured.
  4. Name the disagreement and how you resolved it with evidence.

Follow-up

  • What would you do differently if you ran that again?
  • How did you know your change caused the improvement?

Tell me about a time when a critical bug or production outage occurred. How did you diagnose, resolve, and pre

Medium · Behavioral & Leadership

Tell me about a time when a critical bug or production outage occurred. How did you diagnose, resolve, and prevent it from happening again?

Approach

  1. Pick a story where you made the decision, not one where you watched it.
  2. State the situation in two sentences and spend the rest on the reasoning.
  3. Give the blast radius: what could have broken, and what you measured.
  4. Name the disagreement and how you resolved it with evidence.

Follow-up

  • What would you do differently if you ran that again?
  • How did you know your change caused the improvement?

How do you manage competing priorities when technical debt conflicts with urgent feature deliverables?

Medium · Behavioral & Leadership

Approach

  1. Pick a story where you made the decision, not one where you watched it.
  2. State the situation in two sentences and spend the rest on the reasoning.
  3. Give the blast radius: what could have broken, and what you measured.
  4. Name the disagreement and how you resolved it with evidence.

Follow-up

  • What would you do differently if you ran that again?
  • How did you know your change caused the improvement?