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Wizeline Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

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Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.

What factors could have biased this result, and what would you look into?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

In an A/B test, how can you check if assignment to the various buckets was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

Random Bucketing

A/B Testing & Experimentation

We are: Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact.With the right people and the right ideas, there’s no limit to what we can achieve Are you a fit?Sounds awesome, right? Now, let’s make sure you’re a good fit for the role: Key Responsibilities<ul><li>Develop, test, and maintain backend microservices and APIs using C# and .NET.</li><li>Implement data access layers and write optimized T-SQL queries and stored procedures.</li><li>Write comprehensive unit, functional, and integration tests to ensure code quality and system reliability.</li><li>Participate in code reviews and contribute to a collaborative engineering culture.</li><li>Contribute to CI/CD pipelines for automated builds and deployments.</li><li>Troubleshoot and resolve production issues.</li></ul> Must-have Skills (Remember to include years of experience)<ul><li>5+ years of professional backend development experience.</li><li>Excellent working knowledge of .NET Framework with C#, including asynchronous programming, queuing, caching, logging, XML/JSON serialization, and security.</li><li>Strong SQL Server experience with T-SQL, stored procedures, transactions, ACID compliance, data normalization, and query optimization.</li><li>Proficiency with data access from .NET using ORMs (Entity Framework, Dapper) and direct queries.</li><li>Expertise writing unit, functional, performance, soak, and stress tests; BDD is a plus.</li><li>Strong skills in developing RESTful JSON APIs, including experience with API Gateways and authentication.</li><li>Experience with Continuous Integration/Deployment processes (Git, Jenkins).</li><li>Experience working in both Linux and Windows environments.</li><li>Exposure to Docker, Kubernetes, and serverless patterns in AWS.</li><li>Experience building and deploying microservices.</li><li>Familiarity with infrastructure as code (Terraform, Chef) is a plus.</li></ul> Nice-to-have:<ul><li>AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows.</li></ul> What we offer:<ul><li>A High-Impact Environment</li><li>Commitment to Professional Development</li><li>Flexible and Collaborative Culture</li><li>Global Opportunities</li><li>Vibrant Community</li><li>Total Rewards</li></ul> *Specific benefits are determined by the employment type and location.Find out more about our culture <a>here</a>.

We are:Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact. With the right people and the right ideas, there’s no limit to what we can achieveAre you a fit?Sounds awesome, right? Now, let’s make sure you’re a good fit for the role: Must-have Skills:<ul><li>Strong fundamentals in Software Engineering.</li><li>Direct experience with TypeScript and React.</li><li>Proven ability to adapt across different full-stack environments.</li><li>Demonstrated high performance in fast-paced, dynamic environments.</li><li>Strong adaptability to shifting priorities and self-organizing teams.</li><li>Clear and effective communication skills across cross-functional teams.</li><li>Full English proficiency.</li></ul> Key Qualifications<ul><li>AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows.</li><li>Hands-on experience with Large Language Models (LLMs).</li><li>Understanding of agent architectures and key components, including “agent iceberg” considerations when integrating LLMs.</li></ul> What we offer:<ul><li>A High-Impact Environment</li><li>Commitment to Professional Development</li><li>Flexible and Collaborative Culture</li><li>Global Opportunities</li><li>Vibrant Community</li><li>Total Rewards</li></ul> Find out more about our culture <a>here</a>.

We are:Wizeline, a global AI-centric technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact. With the right people and the right ideas, there’s no limit to what we can achieveAre you a fit?Sounds awesome, right? Now, let’s make sure you’re a good fit for the role:Responsibilities: <ul><li>Write, build and deploy code</li><li>Analyze business application requirements, identify concerns and develop action plans</li><li>Be part of an Agile team, using company’s latest software development life-cycle, working closely with team members from Romania, Spain, and US</li><li>Leverage our Cloud infrastructure (AWS) in order to design solutions that make the best of it</li><li>Maintains existing legacy applications</li><li>Adhere to best practice development standards (such as continuous integration and deployment)</li></ul> Must-have Skills To be successful in this role, you must have:<ul><li>Bachelor’s Degree in computer science or related technical field</li><li>3+ years hands-on software development experience</li><li>Strong knowledge of C# and Microsoft .NET framework</li><li>Strong knowledge of OOP principles</li><li>Knowledge of AWS services such as S3, API Gateway, Lambda, SQS, SNS, ECS, Route 53, etc.</li><li>Unit testing experience (NUnit, MSUnit, NSubstitute, Moq, etc.)</li><li>Knowledge of IaC such as Terraform and AWS CloudFormation</li><li>Knowledge of HTML/CSS/JavaScript/Typescript</li><li>Good understanding of a relational database engine - PostgreSQL or SQLServer</li><li>Experience with modern software development life-cycle</li></ul> Nice-to-have Skills<ul><li>AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows.</li></ul> What we offer:<ul><li>Competitive compensation & total rewards</li><li>Health benefits & wellness programs</li><li>Savings & retirement plans</li><li>Global mobility opportunities</li><li>Flexible work policy and remote-friendly approach</li><li>Happy hours, gaming tournaments, sports activities & more</li><li>Continuous learning & training programs with WizeAcademy</li><li>Free certifications in cloud technologies and coding languages</li></ul>Find out more about our culture <a>here</a>.

We are:Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact. With the right people and the right ideas, there’s no limit to what we can achieveAre you a fit?Sounds awesome, right? Now, let’s make sure you’re a good fit for the role: Key Responsibilities<ul><li>Develop, test, and maintain high-quality features and components using React.</li><li>Write clean, maintainable, and well-tested code. </li><li>Collaborate closely with the Lead Frontend Engineer, backend engineers, and designers</li><li>Participate in code reviews and contribute to establishing best practices. </li><li>Contribute to the entire frontend development lifecycle, from technical design to deployment. </li></ul> Must-have Skills <ul><li>Expert knowledge of the latest version of ReactJS, including the use of hooks and new features in React 18. </li><li>Expert knowledge of HTML best practices, including semantic HTML and writing accessible markup. </li><li>Expert knowledge of CSS, including vanilla CSS and writing scalable CSS systems.</li><li>Proficiency with modern frontend tooling, including Webpack, Babel, and NPM. </li><li>Strong experience with version control using Git and platforms like GitHub. </li><li>Experience with CSS-in-JS libraries. </li><li>Experience building and maintaining component libraries or design systems.</li><li>Familiarity with Storybook for component development and documentation. </li><li>Experience with or a strong understanding of microfrontend architectures.</li></ul>Nice-to-have:<ul><li>AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on the effective use of AI and identify opportunities to streamline workflows.</li></ul> What we offer:<ul><li>A High-Impact Environment</li><li>Commitment to Professional Development</li><li>Flexible and Collaborative Culture</li><li>Global Opportunities</li><li>Vibrant Community</li><li>Total Rewards</li></ul> *Specific benefits are determined by the employment type and location.Find out more about our culture <a>here</a>.

We are:Wizeline, a global AI-centric technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact. With the right people and the right ideas, there’s no limit to what we can achieveAre you a fit?Sounds awesome, right? Now, let’s make sure you’re a good fit for the role: Must-have Skills To be successful in this role, you must have:<ul><li>Strong fundamentals in Software Engineering.</li><li>Direct experience with React and TypeScript (preferred), or Python combined with another programming language.</li><li>Proven ability to adapt across different full-stack environments.</li><li>Demonstrated high performance in fast-paced, dynamic environments.</li><li>Strong adaptability to shifting priorities and self-organizing teams.</li><li>Clear and effective communication skills across cross-functional teams.</li><li>Full English proficiency.</li></ul> Nice-to-have Skills <ul><li>AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows. </li><li>Hands-on experience with Large Language Models (LLMs).</li><li>Understanding of agent architectures and key components, including “agent iceberg” considerations when integrating LLMs.</li></ul> What we offer:<ul><li>Competitive compensation & total rewards</li><li>Health benefits & wellness programs</li><li>Savings & retirement plans</li><li>Global mobility opportunities</li><li>Flexible work policy and remote-friendly approach</li><li>Happy hours, gaming tournaments, sports activities & more</li><li>Continuous learning & training programs with WizeAcademy</li><li>Free certifications in cloud technologies and coding languages</li></ul> Find out more about our culture <a>here</a>.

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
Random Bucketing	A/B Testing & Experimentation	Medium	Very High

Wizeline Interview Questions

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