Prepfully logo
  • Browse Coaches
  • Login
BetaTry Out Our New AI Mock Interviewer – Your Smartest Way to Ace Any Interview!Try Our AI Mock Interviewer
Try Now
NewRegister as a coach and get a $100 bonus on your first completed session if you're on the Prepfully Request for Coaches list.Coach $100 Bonus
Read More
LimitedSummer Deal: Heavy discounts on all Prepfully sessions.Summer Deal: Discounts
Book Now

Your AI Wingman for your next interview

The most comprehensive bank Interview Answer Review tooling available online.

Cutting-edge AI technology meets personalized feedback. Improve your interview answers with insightful guidance provided by a model trained against more than a million human-labelled interview answers.
  • Company rubrics
  • Role-level optimisations
  • Trained on 1mil+ answers
Behavioral
2 years ago
Let me know about a time you had a hard time meeting a deadline.
Frontend EngineerData Science ManagerML Engineering ManagerEngineering Manager

Twilio

Quizlet

Andela

+1

I led a project to implement a new feature in our loan processing system aimed at reducing API latency for faster loan approvals. Midway, I encountered data inconsistencies and latency issues caused by schema mismatches between the new API and our backend services. To resolve this, I optimized the data schema mapping, streamlined query performance, and introduced Redis caching for frequently accessed data, which significantly reduced the API call frequency and improved response times.

I also collaborated with QA to parallelize testing, allowing us to catch issues early. By continuously optimizing our microservices with adjustments to load balancing and asynchronous data processing, we increased processing speeds by 20%. While the deadline was slightly extended, our enhancements directly improved loan approval times and were a solid technical win for both the team and the user experience.

Get answer reviewed by AI
2 years ago
Behavioral
2 years ago
How would you describe yourself and why do you think that you should be hired by Twilio?
Frontend Engineer

Twilio

Get answer reviewed by AI
2 years ago
Behavioral
2 years ago
Please share the lessons you learned from a major work failure.
Frontend EngineerData Science ManagerEngineering ManagerUX Designer

Twilio

Blackbaud Logo

Blackbaud

Seagate Logo

Seagate

When buildling the next generation instance, during the planning phase I budget the amount of servers we will launch the product with. Given each server cost was over 2 million dollar I biased to towards frugality and provided a bare minimum number of server we could launch with. But what I completely missed was during the developement some servers will end up in bad state and the engineering team will short of servers to test the software and firmware getting built which made meeting the project timeline riskly and heavily dependent on delivery schedules of servers and them staying healthy. This quickly became a bottleneck that I realized. I quickly put togther a plan to request adittional server and provide a detailed breakdown on where and how these would be used during and after developement. Synced with the hardware and ODM team and executives to get a approval and ordered the parts to get the servers and racks build at ODM. 

Get answer reviewed by AI
2 years ago
Behavioral
2 years ago
If you receive an offer from Twilio, how long do you think you'll stay here?
Frontend Engineer

Twilio

Get answer reviewed by AI
2 years ago
Behavioral
2 years ago
Where do you see your greatest accomplishment? Why?
Frontend EngineerProgram ManagerFull Stack Software EngineerData Scientist

Twilio

Cognizant Logo

Cognizant

Babylon Health Logo

Babylon Health

+5

During my career I manage a large number of projects, but one of the most challenging ones was the development and launch of a Telematic Control Unit for an important car maker in Japan. The project is important to me due to technical challenges we faced, the skills I applied and the impact on the company.

As Program manager my role was to lead a cross-functional team including Design Engineers, SW Engineers, Operations teams, Material procurement teams, quality and logistics, among others to successfully launch the product to mass production.

First, I kicked-off the project. For that, I shared with the team the project scope, the goals to achieve, I shared the project plan with key milestones and defined the roles and responsibilities for the different team members.

During execution, to maintain a clear communication, I set up design review sessions with the entire engineering organization to ensure everyone was aligned and fixing potential issues in advance. Besides, I led a weekly core-team meeting where we assigned tasks to team members, and setting clear deadlines for each task. To make these tasks easier to manage, I made sure tasks were broken down into manageable sizes with clear descriptions and acceptance criteria. This helped the team to stay focus on their deliveries and maintain speed.

Another important part was to manages Risks. I worked with the team to identify and classify possible risk that might impact to the project deliverables. We defined a Risk matrix to monitor during the development process, and also a project board with the main KPIs to achieve during each stage of the project.

To ensure quality, we defined different testing processes focused on the design, and the process. We installed specific quality check for the documents and devices delivered for each of the milestones of the PDP, as well as a clear quality control in mass production.

Finally, for transparency, I reported on monthly basis to our company leaders and customer about the project status, focusing on Timing, cost, quality and scope.

By employing these strategies, we successfully launched our module on time matching with all the requirements defined by our customer. This was a great example of teamworking, and taught me the importance of breaking down large projects into smaller and easy to manage pieces. Transparent and clear communication was also a great lesson learned. This approach helped me to improve in leading teams through complex problems.

Get answer reviewed by AI
2 years ago
Behavioral
2 years ago
Why are you looking for a job at the moment?
Frontend EngineerData Science ManagerEngineering ManagerUX Designer

Twilio

Samsung Logo

Samsung

Bolt Logo

Bolt

I have been working on same project since last 3 years, I want to explore different projects and learn new skills and Technologies with current market trends

Get answer reviewed by AI
2 years ago
Behavioral
2 years ago
What are your thoughts on Twilio?
Frontend Engineer

Twilio

Get answer reviewed by AI
2 years ago
Behavioral
2 years ago
Please share an instance where you made a big mistake at work.
Frontend EngineerData Engineering ManagerUX ResearcherEngineering Manager

Twilio

Box Logo

Box

Amdocs Logo

Amdocs

+1

I was managing organization wide restructuring program where goal was to map all resources with their delivery accounts to keep a track of account’s PnL and manage capability as cost centre. We also intended to design KRA and KPIs for each individual level to make our Performance Assessment data driven and transparent. This was a big change at employee level at professional and emotional level too. It meant changes in their reporting structures, extra reporting and performance management by all managers, clear KPIs alignment and selection.

Planning Level: We identified all the major business account heads, capability and other function head and organized a communication platform to make them aware and comfortable with the changes. We undertook their inputs on pros and cons and some caution to be exercised

Execution Level: We started executing these changes with L0 level employees and moved up to leadership team. Along the way we encountered some risks and outlier conditions to be managed.

Communication Strategy: We worked with all business and functional heads on our communication strategy to reach out to all the employees. Head multiple events and workshops to discuss the changes.

Data Platform changes: Evaluated all the data platform changes required and planned a phased out approach to bring those changes in the system as well.

However, when we were about to reach closure of this program, I realized that I have made a big mistake of readiness of our existing platforms to support all the changes required and existing data integrity. It really took a toll on everyone involved to clear up data accuracy before the changes could be introduced.

Get answer reviewed by AI
2 years ago
Behavioral
2 years ago
Tell us about how Twilio aligns with your longer-term goals
Frontend Engineer

Twilio

Get answer reviewed by AI
2 years ago
Behavioral
2 years ago
In your opinion, what are some of the key success indicators for someone in the Frontend Engineer role?
Frontend Engineer

Twilio

Get answer reviewed by AI
2 years ago

Try Free AI Interview

Twilio logo

Twilio

Frontend Engineer

Prepare for System Design interview at Twilio

System Design

Question of the week

We'll send you a weekly question to practice for:

Showing 31 to 40 of 77 results

Previous23456Next

*All interview questions are submitted by recent Twilio Frontend Engineer candidates, labelled and categorized by Prepfully, and then published after being verified by Frontend Engineers at Twilio.

  • Embedded Engineer Interview Preparation
  • Samsung Verification Engineer Interview
  • AWS Cloud Support Engineer
  • TCS Scrum Master Interview Guide
  • Oracle Technical Program Manager
  • Stripe Technical Program Manager (TPM) interview guide
  • Company
  • FAQs
  • Contact Us
  • Become An Expert
  • Services
  • Practice Interviews
  • Interview Guides
  • Interview Questions
  • Watch Recorded Interviews
  • Gift sessions
  • AI Interview
  • Social
  • Twitter
  • Facebook
  • LinkedIn
  • YouTube
  • Legal
  • Terms & Conditions
  • Privacy Policy
  • Illustrations by Storyset

© 2025 Prepfully. All rights reserved.

Prepfully logo

Please log in to view more questions.

Not a member yet? Sign up for free.