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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

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

Machinify Salaries by Position

Machinify is a revolutionary healthcare software company with a mission to ensure that patients get the right medical treatment, at the right time, at the right price. Our cloud-based Machinify AI platform leverages the latest advances in machine learning, large language models, data analytics, and cloud processing to solve previously intractable problems, transforming healthcare administration and payment operations. Machinify is seeking a Sr/Staff level Software Engineer with a primary focus on frontend development to contribute towards the UI platform of our product. Were looking for agile people who are passionate about problem-solving, seeking to solve challenges, and have hands-on experience in software development with a product focused background. Our ideal candidate would have current experience as a primary developer, improving team productivity, and proven success understanding product strategy and recommending solutions to critical issues. Our engineering team is composed of the best and brightest software developers and data engineers. Our engineers are responsible for developing the infrastructure behind our intelligent healthcare products to support current and future product lines. Our teams are highly collaborative across all areas of the organization, autonomous in their ability to perform work, and highly impactful towards the success of the business. What youll do: <ul> <li>Develop applications & contribute towards the UI platform </li> <li>Own projects aligned with our product development strategy </li> <li>Design and implement solutions to achieve a delightful and intuitive user experience </li> <li>Contribute to the underlying platform to ensure it is extensible, scalable, and secure </li> <li>Collaborate with team and external stakeholders such as Product Managers, Backend Engineers, UX team, & our customers </li> </ul>What youll bring: <ul> <li>6+ years of production software development experience in Reactclass components </li> <li>Proficiency in React, Javascript, and CSS/HTML experience </li> <li>Familiar with TypeScript </li><li> Experience with reading and understanding complex enterprise-grade code, quickly contribute to it, and suggesting improvements </li> <li>Excellent debugging skills </li> <li>Experience implementing best practices of incorporating AI into user flows </li> <li>Proficient with working/integrating with API Backends </li> <li>Strong CS foundation (data structures, asynchronous programming) </li> <li>BS or MS in Computer science (or equivalent experience) </li><li> Experience with Continuous Integration/Continous Development frameworks </li><li> Familiarity with standard development tools and processes like Github Workflows, Git, JIRA </li> <li>Experience creating and building systems in production with over 10k users </li> <li>Critical thinking and problem solving skills </li> <li>Comfortable with ambiguity and taking the initiative </li></ul> What we offer: <ul> <li>Work from anywhere in the US! Machinify is digital-first. </li> <li>Flexible and trusting environment where youll feel empowered to do your best work </li> <li>Unlimited PTO, recharge days and one no-meetings day a week </li> <li>Medical/Dental/Vision for employees & their families </li> <li>Competitive salary, equity, 401(k) sponsorship </li> <li>Generous Learning and Development Reimbursement policy </li> </ul>The salary for this position is based on an array of factors unique to each candidate: Such as years and depth of experience, set skills, certifications, etc. The base salary range for this role is $170k to $230k. We are hiring for different levels, and our Recruiting team will let you know if you qualify for a different role/range. Salary is one component of the total compensation package, which includes meaningful equity, excellent healthcare, flexible time off, and other benefits and perks to meet the needs of each individual. Equal Employment Opportunity at Machinify Machinify is committed to hiring talented and qualified individuals with diverse backgrounds for all of its positions. Machinify believes that the gathering and celebration of unique backgrounds, qualities, and cultures enriches the workplace.

<h3>Job Description</h3><div>Job Description<div>Machinify is the leading provider of AI-powered software products that transform healthcare claims and payment operations. Each year, the healthcare industry generates over $200B in claims mispayments, creating incredible waste, friction and frustration for all participants: patients, providers, and especially payers. Machinify’s revolutionary AI-platform has enabled the company to develop and deploy, at light speed, industry-specific products that increase the speed and accuracy of claims processing by orders of magnitude.Machinify is seeking a Sr/Staff level Software Engineer with a primary focus on frontend development to contribute towards the UI platform of our product.We’re looking for agile people who are passionate about problem-solving, seeking to solve challenges, and have hands-on experience in software development with a product focused background. Our ideal candidate would have current experience as a primary developer, improving team productivity, and proven success understanding product strategy and recommending solutions to critical issues.Our engineering team is composed of the best and brightest software developers and data engineers. Our engineers are responsible for developing the infrastructure behind our intelligent healthcare products to support current and future product lines. Our teams are highly collaborative across all areas of the organization, autonomous in their ability to perform work, and highly impactful towards the success of the business.What you’ll do:<ul><li>Develop applications & contribute towards the UI platform</li><li>Own projects aligned with our product development strategy</li><li>Design and implement solutions to achieve a delightful and intuitive user experience</li><li>Contribute to the underlying platform to ensure it is extensible, scalable, and secure</li><li>Collaborate with team and external stakeholders such as Product Managers, Backend Engineers, UX team, & our customers</li></ul>What you’ll bring:<ul><li>6+ years of production software development experience in React class components </li><li>Proficiency in React, Javascript, and CSS/HTML experience</li><li>Familiar with TypeScript </li><li>Experience with reading and understanding complex enterprise-grade code, quickly contribute to it, and suggesting improvements</li><li>Excellent debugging skills</li><li>Experience implementing best practices of incorporating AI into user flows</li><li>Proficient with working/integrating with API Backends</li><li>Strong CS foundation (data structures, asynchronous programming)</li><li>BS or MS in Computer science (or equivalent experience) </li><li>Experience with Continuous Integration/Continous Development frameworks </li><li>Familiarity with standard development tools and processes like Github Workflows, Git, JIRA</li><li>Experience creating and building systems in production with over 10k users</li><li>Critical thinking and problem solving skills</li><li>Comfortable with ambiguity and taking the initiative </li></ul>What we offer:<ul><li>Work from anywhere in the US! Machinify is digital-first.</li><li>Flexible and trusting environment where you’ll feel empowered to do your best work</li><li>Unlimited PTO, recharge days and one no-meetings day a week</li><li>Medical/Dental/Vision for employees & their families</li><li>Competitive salary, equity, 401(k) sponsorship</li><li>Generous Learning and Development Reimbursement policy</li></ul>The salary for this position is based on an array of factors unique to each candidate: Such as years and depth of experience, set skills, certifications, etc. The base salary range for this role is $170k to $230k. We are hiring for different levels, and our Recruiting team will let you know if you qualify for a different role/range. Salary is one component of the total compensation package, which includes meaningful equity, excellent healthcare, flexible time off, and other benefits and perks to meet the needs of each individual.Equal Employment Opportunity at MachinifyMachinify is committed to hiring talented and qualified individuals with diverse backgrounds for all of its positions. Machinify believes that the gathering and celebration of unique backgrounds, qualities, and cultures enriches the workplace. </div></div>

<h3>Job Description</h3><div>Job Description<div>Machinify is the leading provider of AI-powered software products that transform healthcare claims and payment operations. Each year, the healthcare industry generates over $200B in claims mispayments, creating incredible waste, friction and frustration for all participants: patients, providers, and especially payers. Machinify’s revolutionary AI-platform has enabled the company to develop and deploy, at light speed, industry-specific products that increase the speed and accuracy of claims processing by orders of magnitude.We are seeking a Director of Data Science. This role will be responsible for the overall leadership and management of the data science team at Machinify, and requires a deep technical background, strong leadership skills, and the ability to drive innovation and excellence in a fast-paced environment. Reporting to the Chief Data Scientist, the Director of Data Science will collaborate closely with other leaders to align engineering efforts with the company's strategic goals.  What you will do:<ul><li>Provide high level technical direction & guidance to a team of Senior and Staff Data Scientists, enabling them to do their best work</li><li>Collaborate with the leadership team to define key technical and business metrics and objectives</li><li>Translate objectives into internal team priorities and assignments</li><li>Drive sprints and work with cross-functional stakeholders to appropriately prioritize various initiatives to improve customer metrics</li><li>Prioritize hiring, mentoring and developing new team members</li><li>Foster a culture of innovation, collaboration, and continuous improvement</li></ul><ul><li>Communicate technical concepts and strategies to technical and non-technical stakeholders effectively</li><li>Own the success of various models on the field by continuously monitoring KPI’s and initiating projects to improve quality.  </li></ul>What you bring:<ul><li>Degree in Computer Science, Engineering, or a related field</li><li>Deep, highly technical data science experience</li><li>Several years in a leadership role</li><li>Startup experience is a big plus</li><li>Proven track record of managing data teams and delivering complex, high-impact products from concept to deployment</li><li>Intimate knowledge of data privacy regulations and best practices in data security</li><li>Exceptional team management abilities, with experience in building and leading high-performing teams</li><li>Ability to think strategically and execute methodically</li><li>Ability to drive change and inspire a distributed team</li></ul><ul><li>Strong problem-solving skills and a data-driven mindset </li></ul>What we offer:<ul><li>A flexible and trusting environment where you'll feel empowered to do your best work.</li><li>Work from anywhere in the US! Our team is distributed and most of us work from home.</li><li>Hardworking and supportive colleagues, and a leadership team that understands the importance of recruiting and retaining top talent.</li><li>Incredible medical, vision, and dental benefits for employees & their families.</li><li>Competitive salary and equity, 401(k) sponsorship.</li></ul>Equal Employment Opportunity at MachinifyMachinify is committed to hiring talented and qualified individuals with diverse backgrounds for all of its positions. Machinify believes that the gathering and celebration of unique backgrounds, qualities, and cultures enriches the workplace. </div></div>

<h3>Job Description</h3><div>Job Description<div>Machinify is a revolutionary healthcare software company with a mission to ensure that patients get the right medical treatment, at the right time, at the right price.  Our cloud-based Machinify AI platform leverages the latest advances in machine learning, large language models, data analytics, and cloud processing to solve previously intractable problems, transforming healthcare administration and payment operations.Machinify is seeking a Sr/Staff level Software Engineer with a primary focus on frontend development to contribute towards the UI platform of our product.We’re looking for agile people who are passionate about problem-solving, seeking to solve challenges, and have hands-on experience in software development with a product focused background. Our ideal candidate would have current experience as a primary developer, improving team productivity, and proven success understanding product strategy and recommending solutions to critical issues.Our engineering team is composed of the best and brightest software developers and data engineers. Our engineers are responsible for developing the infrastructure behind our intelligent healthcare products to support current and future product lines. Our teams are highly collaborative across all areas of the organization, autonomous in their ability to perform work, and highly impactful towards the success of the business.What you’ll do:<ul><li>Develop applications & contribute towards the UI platform</li><li>Own projects aligned with our product development strategy</li><li>Design and implement solutions to achieve a delightful and intuitive user experience</li><li>Contribute to the underlying platform to ensure it is extensible, scalable, and secure</li><li>Collaborate with team and external stakeholders such as Product Managers, Backend Engineers, UX team, & our customers</li></ul>What you’ll bring:<ul><li>6+ years of production software development experience in React class components </li><li>Proficiency in React, Javascript, and CSS/HTML experience</li><li>Familiar with TypeScript </li><li>Experience with reading and understanding complex enterprise-grade code, quickly contribute to it, and suggesting improvements</li><li>Excellent debugging skills</li><li>Experience implementing best practices of incorporating AI into user flows</li><li>Proficient with working/integrating with API Backends</li><li>Strong CS foundation (data structures, asynchronous programming)</li><li>BS or MS in Computer science (or equivalent experience) </li><li>Experience with Continuous Integration/Continous Development frameworks </li><li>Familiarity with standard development tools and processes like Github Workflows, Git, JIRA</li><li>Experience creating and building systems in production with over 10k users</li><li>Critical thinking and problem solving skills</li><li>Comfortable with ambiguity and taking the initiative </li></ul>What we offer:<ul><li>Work from anywhere in the US! Machinify is digital-first.</li><li>Flexible and trusting environment where you’ll feel empowered to do your best work</li><li>Unlimited PTO, recharge days and one no-meetings day a week</li><li>Medical/Dental/Vision for employees & their families</li><li>Competitive salary, equity, 401(k) sponsorship</li><li>Generous Learning and Development Reimbursement policy</li></ul>The salary for this position is based on an array of factors unique to each candidate: Such as years and depth of experience, set skills, certifications, etc. The base salary range for this role is $170k to $230k. We are hiring for different levels, and our Recruiting team will let you know if you qualify for a different role/range. Salary is one component of the total compensation package, which includes meaningful equity, excellent healthcare, flexible time off, and other benefits and perks to meet the needs of each individual.Equal Employment Opportunity at MachinifyMachinify is committed to hiring talented and qualified individuals with diverse backgrounds for all of its positions. Machinify believes that the gathering and celebration of unique backgrounds, qualities, and cultures enriches the workplace. </div></div>

<h3>Job Description</h3><div>Job Description<div>Machinify is a revolutionary healthcare software company with a mission to ensure that patients get the right medical treatment, at the right time, at the right price.  Our cloud-based Machinify AI platform leverages the latest advances in machine learning, large language models, data analytics, and cloud processing to solve previously intractable problems, transforming healthcare administration and payment operations.We are seeking a Sr./Staff Data Engineer to build and own critical data pipelines.  What you’ll do:<ul><li>Independently understand all aspects of a business problem including those unrelated to their area of expertise, weigh pros and cons of different approaches and suggest ones likely to succeed</li><li>Work with a cross-functional organization including engineering, delivering, subject-matter experts, product managers, as well as platform engineers to deliver a scalable framework. </li><li>Map the customer data into Machinify canonical form. Identify and ingest non canonical fields and generalize the process to a minimal level of customization.  </li><li>Proactively design and adapt the canonical form to suit changing query patterns and needs.  </li><li>Ultimately own data availability and quality for the Data Science organization.</li></ul>What You Bring:<ul><li>Deep experience as a hands-on Data Engineer building production data pipelines</li><li>Experience managing the delivery of complex data</li><li>Experience in ETL orchestration and workflow management tools with a strong preference for Apache Airflow</li><li>Experience in Spark or other distributed computing frameworks</li><li> SQL and Python</li><li>Advanced SQL performance tuning</li><li>Kubernetes and building Docker images</li><li>AWS & GCP</li><li>Experience working with APIs to collect or ingest data</li><li>Manage SLA for all pipelines in allocated areas of ownership</li><li>Streaming technologies like kafka , spark streaming etc</li><li>ELK stack , Grafana etc</li></ul>The base salary for this position will vary based on an array of factors unique to each candidate such as qualifications, years and depth of experience, skill set, certifications, etc. The base salary range for this role is $200k-250k. We are hiring for different seniorities, and our Recruiting team will let you know if you qualify for a different role/range. Salary is one component of the total compensation package, which includes meaningful equity, excellent healthcare, flexible time off, and other benefits and perks.Equal Employment Opportunity at MachinifyMachinify is committed to hiring talented and qualified individuals with diverse backgrounds for all of its positions. Machinify believes that the gathering and celebration of unique backgrounds, qualities, and cultures enriches the workplace. </div></div>

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