Rooter Game Developer Interview: Rounds, Questions and Preparation

What the job involves

As a Game Developer in the gaming and creator economy sector, you will build and maintain interactive game features, often for live streaming platforms or casual mobile games. Day to day, you write code in engines like Unity or Unreal, implement gameplay mechanics, optimize performance for low-end devices, and collaborate with designers and artists. At fast-growing companies like Rooter, you may also work on real-time multiplayer, social features, or creator tools that blend gaming with live content.

Role and Technical Knowledge

1. 1

   What is the difference between Update and FixedUpdate in Unity, and when would you use each?

   Explain that Update runs every frame for input and visuals, while FixedUpdate runs at a fixed timestep for physics. Give an example like applying force to a Rigidbody in FixedUpdate.

2. 2

   How do you handle object pooling for bullets or enemies in a mobile game?

   Describe reusing instantiated objects instead of creating and destroying them, to reduce garbage collection and improve performance. Mention a simple pool manager with a queue or list.

3. 3

   Explain how you would implement a simple leaderboard for a casual game with a backend.

   Cover storing scores on a server, using REST APIs or Firebase, and fetching top scores. Mention security like validating scores on the server to prevent cheating.

4. 4

   What are some common ways to optimize a Unity game for low-end Android devices?

   Talk about reducing draw calls, using texture atlases, lowering polygon count, compressing audio, and profiling with Unity Profiler. Mention targeting 30 FPS and avoiding heavy shaders.

Practical Scenarios

1. 5

   You are building a real-time quiz game for a live streaming app. How would you sync questions and answers across players?

   Suggest using a networking library like Photon or Socket.IO, with a server-authoritative timer and state. Explain handling latency with client-side prediction or buffering.

2. 6

   A game feature works in the editor but lags on a real device. How do you debug it?

   Mention using device profiling tools, checking for excessive per-frame allocations, and testing on minimum-spec hardware. Suggest disabling features one by one to isolate the bottleneck.

3. 7

   You need to add a new in-game currency that players can earn by watching ads. Outline your approach.

   Describe integrating an ad SDK, defining a reward callback, updating the player's currency in local storage or backend, and ensuring anti-cheat. Mention UI updates and testing edge cases like ad failures.

4. 8

   How would you design a simple matchmaking system for a 1v1 casual game?

   Cover using player skill rating (like Elo), a queue system, and expanding search criteria over time. Mention handling disconnects and timeouts gracefully.

Behavioural and HR

1. 9

   Why do you want to work in the gaming and creator economy sector, especially at a fast-growing company?

   Show genuine passion for games and creators, and mention excitement about building products that blend live streaming and interactive play. Avoid generic answers about 'loving games' only.

2. 10

   Tell me about a time you had to learn a new game engine or tool quickly for a project.

   Use a specific example from college or a personal project. Highlight how you found resources, built a small prototype, and delivered under time pressure.

3. 11

   Describe a situation where you disagreed with a teammate on a game design or technical choice. How did you resolve it?

   Focus on listening, data or prototyping to test both ideas, and compromising for the project's benefit. Show you can disagree without being difficult.

4. 12

   Where do you see yourself in two years as a game developer?

   Align your growth with the company's needs, like becoming a go-to person for mobile optimization or multiplayer features. Show eagerness to learn and take ownership.

Project and Portfolio Deep Dive

1. 13

   Walk me through a game you built. What was your role and what was the biggest challenge?

   Be ready to explain the game loop, your specific contributions, and a technical hurdle you overcame. Mention what you would improve if you rebuilt it.

2. 14

   How did you handle version control and collaboration in your project?

   Talk about using Git with branches, pull requests, and resolving merge conflicts. If solo, mention how you structured commits and used .gitignore for Unity.

3. 15

   What was one performance issue in your project and how did you fix it?

   Give a concrete example like reducing draw calls by batching, or fixing a memory leak from unsubscribed events. Explain how you measured before and after.

4. 16

   If you had to add a social sharing feature to your game, how would you approach it?

   Discuss integrating platform-specific SDKs (like Facebook or WhatsApp), generating shareable links or images, and handling permissions. Mention testing on multiple devices.