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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

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?

Liftoff & vungle Salaries by Position

Liftoff is the leading growth acceleration platform for the mobile industry, helping advertisers, publishers, game developers and DSPs scale revenue growth with solutions to market and monetize mobile apps. Liftoff's solutions, including Accelerate, Direct, Influence, Monetize, Intelligence, and Vungle Exchange, support over 6,600 mobile businesses across 74 countries in sectors such as gaming, social, finance, ecommerce, and entertainment. Founded in 2012 and headquartered in Redwood City, CA, Liftoff has a diverse, global presence. At Liftoff, we're solving one of the core problems faced by every mobile app: growth. To do so, we build Machine Learning technology that can accurately predict which apps a user will like, and connect them in a compelling way. Our systems operate at a scale unseen outside of the largest Internet companiesprocessing over five million requests per second and interacting with over a billion users per day. Our technology is innovative and we have solid product-market fit; as a result, we've already reached profitability and are seeing tremendous growth. As a Conversion ML PM at Liftoff, you will play a pivotal role in shaping our product strategy for our neural-net powered machine learning system, Cortex, which is built to predict users' responses to ads across different verticals and campaign goals. Why this will be awesome: <ul><li>You'll be working with a world class engineering team who gets things done</li><li>You'll be working on solving one of the most rigorous problems in the machine learning space</li><li>We heavily prioritize rapid experimentation and data collection so that we can try out new product ideas quickly and evaluate them rigorously</li></ul> Responsibilities <ul><li>Develop new ideas to improve our machine learning platform and models</li><li>Develop experimentation plans via brainstorming, market research, and deep analysis</li><li>Work with a world class team of engineers who are strong in both machine learning and software engineering</li><li>Continuously adapt the product roadmap to new data and findings that arise frequently when working with a complex machine learning driven system</li></ul> Requirements <ul><li>3+ years of experience working closely with software and machine learning engineers and shipping technical data focused products</li><li>A well-developed mathematics, computer science, and/or machine learning background</li><li>Solid analytical reasoning and cost-benefit analysis</li><li>Deep data analysis and visualization skills</li><li>SQL and basic proficiency with a scripting language (e.g. Python, R)</li><li>Exemplary written and verbal communication</li><li>Experience in analytics, mobile advertising, or machine learning at scale is a plus.</li><li>Loads of passion for building great products and growing a great company!</li></ul> Location: The location for this role is Pacific Standard Time Zone This role is eligible for full-time remote work in CA or in near one of our US hubs in Redwood City or Los Angeles. Compensation: Liftoff offers all employees a full compensation package that includes equity and health/vision/dental benefits associated with your country of residence. Base compensation will vary based on candidate location and experience. The following are our base salary ranges for this role: SF Bay Area, NYC, Los Angeles/Orange County: $175,000 - $200,000 Seattle/Olympia, San Diego, Santa Barbara: $160,000 - $185,000 Working at Liftoff is fast-paced, fun, and challenging, and we thrive on innovation. Come join the rocket ship and help shape the future of the mobile app ecosystem with us! #LI-VM1 #LI-Remote We use Covey as part of our hiring and / or promotional process for jobs in NYC and certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on January 22, 2024. Please see the independent bias audit report covering our use of Covey here. Liftoff is committed to providing and maintaining a work environment where all employees and candidates are treated with dignity and respect and that is free of bias, prejudice, and harassment. Liftoff is further committed to providing an equal employment opportunity for all employees and candidates for employment free from discrimination and harassment on the basis of sex, gender (including sexual harassment, gender harassment, and harassment due to pregnancy, childbirth, breastfeeding, and related conditions), sexual orientation, gender identity, gender expression, gender nonconformity, race, creed, religion, color, national origin, ancestry (including association, affiliation, or participation with persons or activities related to national origin, English-proficiency or accent, or immigration status), physical or mental disability, medical condition(s), genetic information of an individual or family member of the individual, marital or domestic partner status, age, veteran or military status, family care status, requesting or taking pregnancy, parental or disability leave, requesting an accommodation, or any other characteristic protected by federal, state, or local law, regulation, or ordinance. All such discrimination and harassment is unlawful and will not be tolerated. Liftoff maintains a continued commitment to equal employment opportunity and expects the full cooperation of all personnel. Liftoff's Compensation Strategy Liftoff's compensation strategy includes competitive market rate along with equity and benefits and perks that will give our employees what they need to do their best work. In order to ensure teams are compensated fairly for the work performed, we map out specific levels and take into consideration the cost of labor within each location. Liftoff provides employees a total compensation package of competitive market salaries, equity, health and wellness stipends, medical benefits associated with your country of residence. The base compensation will vary based on location, experience as well as level. Agency and Third Party Recruiter Notice: Liftoff does not accept unsolicited resumes from individual recruiters or third-party recruiting agencies in response to job postings. No fee will be paid to third parties who submit unsolicited candidates directly to our hiring managers or Recruiting Team. All candidates must be submitted via our Applicant Tracking System by approved Liftoff vendors who have been expressly requested to make a submission by our Recruiting Team for a specific job opening. No placement fees will be paid to any firm unless such a request has been made by the Liftoff Recruiting Team and such a candidate was submitted to the Liftoff Recruiting Team via our Applicant Tracking System.

Liftoff is the leading growth acceleration platform for the mobile industry, helping advertisers, publishers, game developers and DSPs scale revenue growth with solutions to market and monetize mobile apps.Liftoff’s solutions, including Accelerate, Direct, Influence, Monetize, Intelligence, and Vungle Exchange, support over 6,600 mobile businesses across 74 countries in sectors such as gaming, social, finance, ecommerce, and entertainment. Founded in 2012 and headquartered in Redwood City, CA, Liftoff has a diverse, global presence.Position SummaryAt Liftoff, the Supply Exchange Core team is essential to the success of our Publisher side business. Our team is dedicated to designing and building platform infrastructure that processes over a billion events daily, and we are rapidly expanding. We are a group of innovative engineers leveraging the latest technology to develop efficient and scalable systems. If you're passionate about building and scaling low-latency, high-throughput systems, we would love to speak with you!LocationThis is a remote-first role, requiring:<ul><li>Ability to work Pacific time zone hours.</li><li>Willingness to travel to Orange County for in-person meetings 1-2 weeks per quarter.</li></ul>Liftoff is a remote-first company with US hubs in Redwood City, Los Angeles, San Francisco, Orange County, and NYC. Given that most of the team is based in Orange County, it would be beneficial for the individual to be located in the OC/Los Angeles area for regular in-person meetings at our OC office (Costa Mesa, CA 92626). Most of the local team meets in-office once per week. We are also open to candidates located on the West Coast who are willing to travel regularly (one week per quarter) to the OC office.Responsibilities<ul><li>Take ownership and work with various product management, development and quality assurance groups in a fast-paced environment.</li><li>Focusing on code readability, performance, testing, documentation, continuous integration.</li><li>Become familiar with core development, product release and its business.</li><li>Implementing new features and streamlining existing services.</li><li>Minimizing complexity and increasing shared understanding.</li><li>Share knowledge and best practices with team members.</li><li>PagerDuty on-call rotation.</li></ul>Qualifications<ul><li>BS in Computer Science with 5+ years professional experience; or MS in Computer Science with 3+ years of professional experience; or equivalent work experience.</li><li>Proficient in at least one of the following languages: Golang (preferable), C/C++, Java, Python.</li><li>Experience building low-latency, high-throughput, distributed backend services.</li><li>Deep understanding of computer architectures, data structures, and algorithms.</li><li>Knowledge of profiling and debugging distributed microservices.</li><li>Experience building data-intensive applications.</li><li>Experience with distributed system observability metrics, using it for data driven design decisions.</li><li>Have good team communication and collaboration skills.</li><li>Passionate about helping others and invested in the team’s success.</li><li>Good at English (oral, writing, reading).</li></ul>Preferred Experience<ul><li>Previous experience in ad-tech.</li><li>Proficient in Golang.</li><li>Redis, RocksDB, Mongo, Kafka.</li><li>gRPC, RestAPI, GraphQL.</li><li>ML, Tensorflow.</li></ul>Liftoff offers all employees a full compensation package that includes equity and health/vision/dental benefits associated with your country of residence. Base compensation will vary based on candidate location and experience. The following are our base salary ranges for this role: SF Bay Area, NYC, Los Angeles/Orange County: $170,000 - $190,000 Seattle/Olympia, Austin, San Diego, Santa Barbara, Boston: $155,000 - $175,000 All other cities and towns in our approved states: $145,000 - $165,000 #LI- EL1Liftoff is committed to providing and maintaining a work environment where all employees and candidates are treated with dignity and respect and that is free of bias, prejudice, and harassment. Liftoff is further committed to providing an equal employment opportunity for all employees and candidates for employment free from discrimination and harassment on the basis of sex, gender, sexual orientation, gender identity, race, religion, national origin, disability, age, veteran status, and other characteristics protected by law.
#J-18808-Ljbffr

Liftoff is the leading growth acceleration platform for the mobile industry, helping advertisers, publishers, game developers and DSPs scale revenue growth with solutions to market and monetize mobile apps. Liftoff's solutions, including Accelerate, Direct, Influence, Monetize, Intelligence, and Vungle Exchange, support over 6,600 mobile businesses across 74 countries in sectors such as gaming, social, finance, ecommerce, and entertainment. Founded in 2012 and headquartered in Redwood City, CA, Liftoff has a diverse, global presence. As a Staff Software Engineer, Demand Applications at Liftoff, you will: <ul><li>Design, engineer & implement highly available, fault-tolerant, distributed systems to enhance real-time bidding system.</li><li>Work closely with Data Scientists, product and infra engineers to understand, refine, and prioritize requirements for machine learning models.</li><li>Take ownership and work with various product management, development, and quality assurance groups in a fast-paced environment.</li><li>Advocate for improvements to product quality, security, and performance that have an impact across team and others.</li><li>Focus on performance, testing, documentation, continuous integration.</li><li>Mentor and share knowledge with team members.</li><li>Confidently ship large features and improvements with minimal guidance and support from other team members.</li><li>Use strong communication skills (written and verbal) collaborate with the team on larger projects.</li><li>Drive innovation on the team with a willingness to experiment and boldly confront problems of immense complexity and scope.</li><li>Telecommuting may be permitted. When not telecommuting, must report to 1950 Sawtelle Blvd, Los Angeles, CA 90025.</li><li>Salary: $185,000 - $265,000 per year. MINIMUM REQUIREMENTS: Bachelor's degree or U.S. equivalent in Computer Science, Computer Engineering, Information Technology, or a related field plus 7 years of professional experience as Senior Software Engineer, Software Engineer, or any occupation/position/job title involving designing software, developing software, or automating testing software. In lieu of a Bachelor's degree plus 7 years of experience, the employer will accept a Master's degree or U.S. equivalent in Computer Science, Computer Engineering, Information Technology, or a related field, plus 5 years of professional experience as Senior Software Engineer, Software Engineer, or any occupation/position/job title involving designing software, developing software, or automating testing software. Must also have experience in the following: 5 years of professional experience in software programming using Golang, Java, or Python; 3 years of professional experience designing and implementing highly scalable and distributed systems; 3 years of professional experience with database design, optimization, and management to support large-scale applications; 3 years of professional experience with both SQL and NoSQL databases, as well as message queuing (MQ) technologies; 3 years of professional experience working within a highly agile and intensely iterative software development process; 2 years of professional experience in cloud computing platforms, including Amazon Web Services (AWS), Microsoft Azure, or Google Cloud Platform (GCP); 2 years of professional experience collaborating with cross-functional teams.</li></ul> Please apply online at: https://liftoff.io/company/careers/ #LI-DNI We use Covey as part of our hiring and / or promotional process for jobs in NYC and certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on January 22, 2024. Please see the independent bias audit report covering our use of Covey here. Liftoff is committed to providing and maintaining a work environment where all employees and candidates are treated with dignity and respect and that is free of bias, prejudice, and harassment. Liftoff is further committed to providing an equal employment opportunity for all employees and candidates for employment free from discrimination and harassment on the basis of sex, gender (including sexual harassment, gender harassment, and harassment due to pregnancy, childbirth, breastfeeding, and related conditions), sexual orientation, gender identity, gender expression, gender nonconformity, race, creed, religion, color, national origin, ancestry (including association, affiliation, or participation with persons or activities related to national origin, English-proficiency or accent, or immigration status), physical or mental disability, medical condition(s), genetic information of an individual or family member of the individual, marital or domestic partner status, age, veteran or military status, family care status, requesting or taking pregnancy, parental or disability leave, requesting an accommodation, or any other characteristic protected by federal, state, or local law, regulation, or ordinance. All such discrimination and harassment is unlawful and will not be tolerated. Liftoff maintains a continued commitment to equal employment opportunity and expects the full cooperation of all personnel. Liftoff's Compensation Strategy Liftoff's compensation strategy includes competitive market rate along with equity and benefits and perks that will give our employees what they need to do their best work. In order to ensure teams are compensated fairly for the work performed, we map out specific levels and take into consideration the cost of labor within each location. Liftoff provides employees a total compensation package of competitive market salaries, equity, health and wellness stipends, medical benefits associated with your country of residence. The base compensation will vary based on location, experience as well as level. Agency and Third Party Recruiter Notice: Liftoff does not accept unsolicited resumes from individual recruiters or third-party recruiting agencies in response to job postings. No fee will be paid to third parties who submit unsolicited candidates directly to our hiring managers or Recruiting Team. All candidates must be submitted via our Applicant Tracking System by approved Liftoff vendors who have been expressly requested to make a submission by our Recruiting Team for a specific job opening. No placement fees will be paid to any firm unless such a request has been made by the Liftoff Recruiting Team and such a candidate was submitted to the Liftoff Recruiting Team via our Applicant Tracking System.

Liftoff & vungle Interview Questions

Liftoff & vungle Interview Guides

Liftoff & vungle Interview Questions

Liftoff & vungle Salaries by Position

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