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Chargebee Interview Questions

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Let’s say we have a table with an <code>id</code> and <code>name</code> fields. The table holds over 100 million rows and we want to sample a random row in the table without throttling the database.

Write a query to randomly sample a row from this table.

Input:

<code>big_table</code> table

<table>
<thead>
<tr>
<th>Columns</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>name</code></td>
<td>VARCHAR</td>
</tr>
</tbody>
</table>

Write a query to randomly sample a row from a big table.

Random SQL Sample

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?

Let’s say you work for a social media company that has just done a launch in a new city. Looking at weekly metrics, you see a slow decrease in the average number of comments per user from January to March in this city.

The company has been consistently growing new users in the city from January to March.

What are some reasons why the average number of comments per user would be decreasing and what metrics would you look into?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

Decreasing Comments

How would you investigate a decline in the average number of comments per user?

Chargebee Salaries by Position

About Chargebee: Chargebee is a subscription billing and revenue management platform powering some of the fastest-growing brands around the world today, including Calendly, Hopin, Pret-a-Manger, Freshworks, Okta, Study.com and others. Thousands of SaaS and subscription-first businesses process over billions of dollars in revenue every year through the Chargebee platform.Headquartered in San Francisco, USA, our 500+ team members work remotely throughout the world, including India, the Netherlands, Paris, Spain, Australia, and the USA. Chargebee has raised over $480 million in capital and is funded by Accel, Tiger Global, Insight Partners, Steadview Capital, and Sapphire Ventures. And we’re on a mission to push the boundaries of subscription revenue operations. Not just ours, but every customer and prospective business on a recurring revenue model. Our Engineering team builds high-quality and innovative software to enable our customers to grow their revenues powered by the state-of-the-art subscription management platform. Position Summary:Chargebee is looking for an inspirational Engineering leader to drive the Next Generation of its Mobile and Omnichannel platform to create a revolutionary subscriptions experience for its customers. This role requires a blend of strong technical expertise, exceptional system design skills, and a passion for leading and mentoring engineering teams. As an Engineering Manager, you will oversee the development and delivery of key product features, working closely with cross-functional teams to ensure the successful execution of innovative, customer-focused solutions. Your role will involve both strategic leadership and hands-on technical contributions to ensure the team delivers scalable, high-quality products that meet business objectives. Key Responsibilities:Reporting to the Director of Engineering for Core Services, the key responsibilities include:<ul><li>As Engineering Manager of Mobile and Omnichannel Platform, you will build, inspire, and grow talented engineering teams that are responsible for designing and building end-to-end product capabilities for Chargebee’s Subscription Management Platform.</li><li>We are building a best-in-class experience for our Mobile and Omnichannel customers. You will be leading the engineering efforts in building a zero to one product and platform, guiding it from initial concept to production and beyond.</li><li>You will be responsible for managing product milestones, deployment cycles & delivery of the overall Subscriptions and Invoicing workflows through the various Marketplaces and Mobile platforms.</li><li>You will work with product management, GTM and engineering teams to influence key decisions on architecture and roadmap by identifying opportunities for innovation.</li><li>Lead by example through hands-on coding when necessary, and inspire your team with your technical expertise.</li><li>Directly responsible for the career advancement of the engineers at various stages of their career growth.</li></ul> Qualification:<ul><li>Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.</li><li>12+ years of proven experience leading large teams including managers in remote and distributed product engineering setup, ideally in a zero to one product/platform.</li><li>Proven experience designing and building scalable systems from the ground up, with deep expertise in system design, architecture, and cloud platforms (AWS, Azure, GCP).</li><li>Strong hands-on technical skills with the ability to contribute to code.</li><li>Demonstrated success building culture of innovation, ownership, accountability, and customer focus</li><li>Ability to apply object-oriented and functional programming styles to solve real world problems.</li><li>Accomplished practitioner of Agile and DevOps practices with experience guiding teams through planning, development, rollout and migration.</li><li>Good communication and presentation skills with ability to interact with different cross-functional teams of varying levels.</li><li>Ability to learn new tools and paradigms in engineering, especially in backend technologies and AI, intellectually curious and continuously striving to learn.</li></ul> Skills:<ul><li>Solid experience in managing B2C and B2B enterprise grade distributed backend systems.</li><li>Strong knowledge of Java, SQL and NoSQL databases and an understanding of JavaScript frameworks like Vue, React or Angular.</li><li>Experience with building global scale cloud-native systems and modern tech stack: AWS, Spring Boot Framework, RESTful API, and container-based applications.</li><li>Deep understanding of distributed systems architecture and industry best practices</li><li>Experience creating/supporting production software/systems and a proven track record of identifying and resolving performance bottlenecks in production.</li><li>Experience building Mobile applications would be an added advantage. </li></ul> What makes us who we are:<ul><li>We are Globally Local: With a diverse team across four continents, and customers in over 60 countries, you get to work closely with a global perspective right from your own neighborhood.</li><li>We value Curiosity: We believe the next great idea might just be around the corner. Perhaps it’s that random thought you had ten minutes ago. We believe in creating an ecosystem that fosters a desire to seek out hard questions, figure out answers to them, and foster a continuous learning environment.</li><li>Customer! Customer! Customer!: Everything we do is driven towards enabling our customers’ growth. This means no matter what you do, you will always be adding real value to a real business problem. It’s a lot of responsibility, but also a lot of fun.</li></ul> If you resonate with Chargebee, have a monstrous appetite for curiosity, and an insatiable urge to learn and build new things, we’re waiting for you!We value people from all backgrounds and are dedicated to hiring and employing a diverse and inclusive workplace. Come be a part of the Chargebee tribe!

Chargebee Interview Questions

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Chargebee Interview Questions

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