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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?

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

Let’s say that your company is running a standard control and variant AB test on a feature to increase conversion rates on the landing page. The PM checks the results and finds a .04 p-value.

How would you assess the validity of the result?

Experiment Validity

Chargebee Salaries by Position

Responsibilities: <ul><li>Identify and configure system enhancements and changes to modules; collaborate with internal stakeholders (IT, HR Business Partners, Total Rewards, Talent Acquisition (aka recruiting) (“TA”)) for current and future module configuration upgrades and/or implementation.</li><li>Develop strategies and plans to execute on the process enhancements/upgrades successfully to achieve business objectives.</li><li>Manage People Success systems and processes including EOR (Employer of Record) gather and document business requirements, leading fit-gap analysis, as-is and to-be business process designs, and user acceptance testing for any new implementations or changes</li><li>Support TA with leadership, other hiring status reports, and administration of TA initiatives</li><li>Manage TA reports on a daily, weekly, monthly basis and work with key stakeholders to improve them </li><li>Work with Financial Planning & Analysis on recruiting expense payouts</li><li>Solve complex technical issues relating from data issues or mapping issues to working with external partners to solve configuration issues with the HRIS or any other HR systems.</li><li>Work closely with project teams on new initiatives that involve changes and/or enhancements to HR systems.</li><li>Develop and drive continuous improvement initiatives, organizing necessary resources.</li></ul> Must Haves <ul><li>At least 8 years of Human Resources systems and analytics experience with experience setting up and configuring HRIS systems</li><li>Experience with HR systems requirements gathering for development of functional solution design, implementation, data-migration, system testing, user acceptance testing, go-live, and vendor service support. </li><li>Experience in macros and people analytics, including but not limited to talent acquisition reporting and analytics </li><li>Experience in enhancing and leveling up HRIS; experience with upgrades, implementations and managing 3rd party service providers</li><li>Demonstrated ability to actively engage in hands-on work to support and enhance HR processes</li><li>Strong employee service orientation with the ability to communicate effectively both orally and in writing, including explaining technical issues and solutions to non-technical audiences</li><li>Demonstrated ability to work in a fast-paced, global environment and coordinate multiple projects/initiatives simultaneously while meeting deadlines and business objectives.</li><li>Experience in change management while implementing new systems or propcesses</li><li>Proactively and independently manage stakeholder expectations for timelines and deliverables throughout project lifecycle with little/no intervention from business/region leadership.</li><li>Experience managing human resources compliance </li><li>High ethical standards and ability to maintain confidentiality</li><li>Attention to details and & an enthusiasm</li></ul>

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 is the leading Revenue Growth Management (RGM) platform for subscription businesses. Thousands of companies at every stage of development — from startups to enterprises — use Chargebee to unlock revenue growth, experiment with new offerings and monetization models, and maintain global compliance as they scale. Chargebee counts businesses like Freshworks, Calendly, and Study.com amongst its global customer base and is proud to have been named a Leader in Subscription Management by G2 for five consecutive years, as well as a Great Place to Work in both the United States and India. We are backed by some of the most respected investors in the world; Accel, Tiger Global, Insight Partners, Steadview Capital, and Sapphire Venture, who believe in the magic of subscriptions and the world that they can create — from cars to coffee pods and everything in between. With headquarters in San Francisco and Amsterdam,our 1000+ team members work remotely throughout the world, including in India, Europe and the US. Job SummaryChargebee is in the pursuit of simplifying the recurring payment collection for merchants from their global customer base as a part of the overall subscription management platform. As a part of this critical Payments team, you will be a key member operating at a cross section of cutting edge payments and a state of the art innovative platform aimed at experience driven global services to our customers. It entails the full spectrum of conceptualization of ideas to gathering and documenting requirements on one end to working closely with other functions like Finance, Legal, Compliance and Infrastructure & Product Engineering teams to get their requirements met. In this role you will be responsible for managing product lifecycle across various payment types, internal and external partners, token services, enriching customer experience through UX/UI, helping build state of the art front and back-end payment API services to enable global success of the platform. Roles and ResponsibilitiesProduct Management <ul><li>Develop and drive the product vision & strategy to enable seamless expansion opportunities for Chargebee customers which aligns with the company's overall strategy and goals.</li><li>Break down and define the roadmap to help achieve the desired goals in an optimal manner. </li><li>Conduct market research, collaborate with customers and GTM teams to identify customer needs, industry trends, and competitive landscape in the payments space.</li><li>Drive the end-to-end product development lifecycle from ideation to launch in collaboration with the Product Research, Design, Engineering, Compliance, Security, GTM teams and external partners, ensuring timely delivery and high-quality products encompassing all the security and regulatory aspects. </li><li>Be an active participant in the payments API strategy with focus on Security, Privacy & Governance pillars for building a scalable platform.</li><li>Define and track key success metrics to measure the success and impact of payment products.</li><li>Being an API first platform and the integrations to external systems happen via API, be comfortable analyzing the APIs and understanding the services and capabilities provided by the partners. </li><li>Foster partnership and working relationships with external partners who enable various parts of the payment processing like Card networks (Visa, Mastercard), Payment Service Providers (Stripe, Paypal, Adyen), Vaulting providers, to identify the latest innovations which could be beneficial to Chargebee customers and to enable a smooth end to end operations for these customers. </li><li>Be intensely data driven in prioritizing and evaluating the results of all work.</li><li>Stay up-to-date with industry regulations, compliance requirements, and security standards related to payments.</li><li>Collaborate with marketing and sales teams to develop go-to-market strategies and support product launches.</li><li>Provide training and support to internal teams, including customer support and operations, to ensure smooth adoption and usage of payment products.</li><li>Ideate emerging payment trends, independently test & build pilots for adoption based on used cases at Chargebee and demonstrate it to the broader community for adoption.</li><li>Develop insights using data and research to create new experiences that fundamentally transform how our customers use Chargebee.</li></ul> Customer Engagement<ul><li>Lead customer engagement calls as a Payments expert and consultant on matters pertaining to payments and financial services product capabilities. </li><li>Help customers resolve issues and pain points.</li><li>Conduct customer interviews through online and offline channels and use that effectively to improve the platform.</li><li>Participate in partner discussions driving all aspects of integration and partnership.</li></ul> What makes you a great fit<ul><li>8-12 years of experience in payments, financial services operating with a passion for innovation.</li><li>Domain experience in payments / banking / platform based products.</li><li>Experience and familiarity with financial regulations and network rules.</li><li>Experience running A/B tests, evaluating results, and leading post-launch optimizations.</li><li>Experience working with payments including cards, alternate payment methods, direct debit, digital wallets, vaults, token management,</li><li>Hands-on experience with payment gateways, PayFacs, marketplaces and understanding of the mechanics of settlements, chargebacks as well as building delightful merchant and customer experience at a platform level.</li><li>Deep knowledge of the online payments landscape in the United States, United Kingdom and Europe.</li><li>Hands-on experience in building and offering FinTech services will be a plus.</li><li>Good understanding of web applications, data and micro service architecture - REST APIs.</li><li>Excellent communication skills, both verbal and written; ability to condense complicated scenarios into simple, risk-based assessments.</li><li>Effective team player with experience in coaching and supporting junior team members.</li><li>Experience in operating using Agile methodologies & use of JIRA / confluence.</li></ul> Education and Experience<ul><li>Bachelor in any discipline (Computer science will be an advantage)</li><li>MBA or equivalent from a premium college will be preferred but not required</li></ul> BenefitsWant to know what it means to work for a company that genuinely cares about you? Check out just a few of the benefits we give our employees: We are Globally LocalWith 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. We value CuriosityWe 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, and then figure out answers to them. 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.

We are seeking a dynamic and analytical Senior Product Manager to join our growing team and play a crucial role in the development and enhancement of Chargebee RevRec, a leading revenue accounting solution for subscription businesses. As a key member of the Product Management team, you will be responsible for driving the product strategy, execution, and continuous improvement of Chargebee RevRec. Responsibilities: <ul><li>Customer Engagement: Actively engage with the finance team at prospects and customers to collect valuable feedback and understand their pain points in revenue recognition, accounts receivable (A/R), sales tax, and payment areas. This includes conducting interviews, surveys, and gathering insights through user interactions to develop a deep understanding of customer needs and preferences.</li><li>Function Testing: Conduct comprehensive function testing to ensure that Chargebee RevRec is free of bugs and performs optimally. Identify and document any issues, providing detailed feedback to the development team for timely resolution.</li><li>Cross-Functional Collaboration: Collaborate closely with cross-functional teams, including developers, designers, marketing, and customer support, to ensure a successful product development and launch process. Work effectively with cross-functional teams to resolve any issues that may arise during the development process.</li><li>Financial Accounting Expertise: Leverage your deep financial accounting knowledge to understand the unique needs and challenges of our target audience. Collaborate with the product development team to tailor features and solutions that meet the financial accounting requirements of our clients.</li><li>Software Development Life Cycle (SDLC): Guide and oversee the product through the SDLC, from concept to release. Collaborate with the development team to ensure timely and successful product development, ensuring that the product is developed according to the agreed-upon scope, schedule, and budget.</li><li>Product Education: Develop and create educational materials, such as documentation, webinars, and tutorials, to help customers make the most of Chargebee RevRec. Assist the marketing team in developing product messaging and content that resonates with our target audience.</li><li>Competitive Analysis: Stay up-to-date on industry trends and competitive products. Identify opportunities for product improvement and differentiation based on market research. Analyze competitor products and services to identify opportunities for Chargebee RevRec to gain a competitive edge.</li></ul> Qualifications: <ul><li>Bachelor's degree in a related field, such as Business, Accounting, Finance, Management Information Systems (MIS), or a similar discipline.</li><li>5+ years of experience in product management, with a demonstrated track record of success in developing and launching successful products.</li><li>Previous experience in financial accounting is highly desirable.</li><li>Strong analytical and problem-solving skills with a keen eye for detail.</li><li>Excellent communication skills with the ability to articulate technical concepts to non-technical stakeholders.</li><li>An understanding of the SDLC and familiarity with tools such as Excel, Jira, SQL, and database management.</li><li>Knowledge of UI (User Interface) and UX (User Experience) design principles.</li><li>Self-motivated, proactive, and able to work both independently and as part of a team.</li></ul>

About Chargebee: Chargebee is the leading Revenue Growth Management (RGM) platform for subscription businesses. Thousands of companies at every stage of development — from startups to enterprises — use Chargebee to unlock revenue growth, experiment with new offerings and monetization models, and maintain global compliance as they scale.Chargebee counts businesses like Freshworks, Calendly, and Study.com amongst its global customer base and is proud to have been named a Leader in Subscription Management by G2 for five consecutive years, as well as a Great Place to Work in both the United States and India.We are backed by some of the most respected investors in the world; Accel, Tiger Global, Insight Partners, Steadview Capital, and Sapphire Venture, who believe in the magic of subscriptions and the world that they can create — from cars to coffee pods and everything in between. With headquarters in San Francisco and Amsterdam,our 1000+ team members work remotely throughout the world, including in India, Europe and the US. As a ML Engineer you’ll be:<ul><li>Creating and maintaining ML pipelines to operationalize ML models.</li><li>Developing & deploying low latency and highly scalable dockerized micro services.</li><li>Collaborating in cross-functional software/architecture design sessions to find the best solutions for the problems that we are facing.</li><li>Working with Peer Software engineers, data engineers and data scientists who will be responsible for building and integrating the machine learning models for Chargebee.</li><li>Building ML platform to speed up develop & deploy cycle and monitoring of models in production</li></ul> What makes you a great fit:<ul><li>You have 3+ years of experience in Machine Learning Engineering / MLOps</li><li>You have prior experience in AWS Sagemaker</li><li>You have experience in building data solutions, both batch processes and streaming applications</li><li>Code writing capabilities in any programming language (preferably Python) and familiarity with relevant ML packages </li><li>Experience in designing ML pipelines, including model versioning, model deployment, model testing, and monitoring</li><li>You have a high-level understanding with big-data technologies such as Spark, SparkML, Hadoop etc</li><li>You have an understanding on how the performance optimization works in the end-to-end data pipeline including ML/DS inferencing</li><li>You’re a self-starter who can work comfortably in a fast-moving company where priorities can change, and processes may need to be created from scratch with minimal guidance.</li><li>You have significant experience working with varied stakeholders</li></ul> Know Our Tech Stack: AWS Sagemaker, Python, Bigquery, S3 lakehouse Benefits:Want to know what it means to work for a company that genuinely cares about you? Check out just a few of the benefits we give our employees:i) Unlimited PTO, Parental leaveii) Accident, Life and medical insuranceiii) Employee assistance program for mental wellnessiv) Work from home allowancev) Gratuity We are Globally LocalWith 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. We value CuriosityWe 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, and then figure out answers to them. 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!

Chargebee Interview Questions

Chargebee Interview Guides

Chargebee Interview Questions

Chargebee Salaries by Position

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