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Blizzard Entertainment

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Blizzard Entertainment Site Reliability Engineer Interview Questions

Updated Jan 13, 2022

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Found 3 of over 492 interviews

Interviews at Blizzard Entertainment

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Positive67%
Negative33%
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Recruiter50%
Employee Referral50%
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Blizzard Entertainment

Anonymous Employee

Accepted Offer
Positive Experience
Average Interview
Application

I interviewed at Blizzard Entertainment

Interview

The process took overall around 3 months time consisting of 8 interviews with various SRE teams, including the initial screen with the recruiter. The recruiter was pretty good at communicating next steps and keeping me in the loop. The interviews with each team were super fun, detailed, and challenging. There were plenty of opportunities to ask my own questions throughout each interview.

Interview Questions
  • No specifics. Know the technologies in the job postings and you'll do well.
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Blizzard Entertainment

Anonymous Interview Candidate

No Offer
Negative Experience
Average Interview
Application

I applied through a recruiter. I interviewed at Blizzard Entertainment in Apr 2021

Interview

Recruiter then a friendly meeting with the manager to learn about the team and discuss experience. Then a take home task that you should "only spend and hour or two" on. As a "conversation starter" for your next interview. I found out that if you don't spend many hours on this there won't be another conversation. 3 of the options require UML, which I was surprised to see.

Interview Questions
  • Software Engineering (pick whatever language you are most comfortable in) a. Utilize Blizzard Hearthstone API (See: Getting started and API guides) to retrieve card data i. For the purposes of this exercise, a proper secret management mechanism is not required. Use of an industry standard solution (Vault, Parameter Store, etc.) can be implied in your documentation. ii. This does not need to be a running service hosted somewhere. We will review your submission and discuss your strategies. b. Create web application to render requested information from the API into a human readable page i. Retrieve details of any 10 cards with the following criteria 1. Class: Druid OR Warlock 2. Mana: At least 7 3. Rarity: Legendary ii. Display results sorted by card ID in a human readable table that includes: · Card image · Name · Type · Rarity · Set · Class a. Provide link to repository for application source and documentation 2. Reliability Engineering a. Examine UML sequence diagram of a proposed new service b. Describe the following i. What is the critical user path? ii. Propose graceful degradation of individual components iii. Propose any relevant SLAs, SLIs, and SLOs for the application 1. Describe how/where/what you would measure and propose initial SLO/SLA values and their justification for a business critical service. 2. Describe what metric types or events you use in your SLIs and include any filtering criteria. a. The service is now live but your monitoring of one of the critical software components indicates the error budget burn rate is excessive. You approach the development team and determine they have an aggressive deployment cadence and a number of pushes have had issues. What do you suggest and discuss with your partner team? UML Diagram code @startuml title "Login flow" actor "Client" as A boundary "Edge service" as B participant "Auth" as C participant "Entitlement" as D participant "Account" as E participant "Game Data" as F participant "Recommendations" as G participant "Friends" as H participant "Presence" as I Note over A: Customer device Note over B: Request broker A->>B: Custom RPC\npersistent connection B->>C: Verify credentials\nand request token C->>B: Confirms credentials\nand supplies token Note over B: User session created B->>A: Notify login success A->>B: Request game titles\nfor UI display B->>D: REST API request\ntitles for user_id D->>E: REST API request\nfor titles owned by user_id E-->>D: D->>F: REST API request for\nmeta-data and CDN asset\nlinks for each title F-->>D: D->>G: REST API request for\nrecommendations using\nlist of owned titles Note over G: Generates custom recommendations G-->>D: D->>B: JSON payload containing\nowned and recommended titles B->>A: JSON payload passed\nthrough to client Note over A: Displays lists of owned\nand recommended\ntitles and any promotions A->>B: Request for friends data B->>H: REST request for friends data Note over H: Queries DB for list\nof friends and online status H->>I: REST request for\ncurrent activity\nof each friend I-->>H: H->>B: JSON payload containing friends and their status B->>A: JSON payload passed\nthrough to client Note over A: Payload parsed and\nfriends UI element populated @enduml 3. Systems Internals a. Scenario: Your partner development team comes to you to help them with some performance related issues. They say, according to their calculations and local testing, they should be able to be able to achieve a much higher request rate before they reach their thread limits. However, in their staging environment, they notice the average request takes significantly longer than it should to process so the number of in-flight requests quickly climbs and exhausts system resources. The developer says, when they test locally, the service responds consistently with single-digit latency. b. Utilize the following data sources to determine why this is happening and make any necessary recommendations. i. Service diagram from the development team UML Service diagram @startuml title "Translatatron" actor "Load tester" as A boundary "Application server" as B participant "Redis" as C A->>B: HTTP Note over B: Application translates\nEnglish to Orcish B->>C: Metadata for real-time\napplication analytics B->>A: Response @enduml Attachment: th3.zip ii. Application source code (th3-server.py) iii. PCAP from server application instance (th3-server.pcap) iv. HTTP request logs from the server application
3 people found this interview helpful

Blizzard Entertainment

Anonymous Employee in Irvine, CA

Accepted Offer
Positive Experience
Average Interview
Application

I applied through an employee referral The process took 4 months. I interviewed at Blizzard Entertainment (Irvine, CA) in May 2019

Interview

I had a recruiter reach out to me and a short phone call was scheduled to go over my background. Next, the hiring manager reached out to gauge more of the technical side. Then, a take-home technical problem was given and a WebEx was scheduled to discuss more in-depth my technical background. Finally, I was flown out for an in-person interview which had some technical discussions but was more of a gauge on culture fit. The whole process took roughly a month and was very enjoyable. The recruiter was very communitive and took initiative to keep me in the loop. The people were enjoyable to deal with and it felt more like conversations than interviews.

Interview Questions
1 person found this interview helpful
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