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Affinity Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

Affinity Interview Guides

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 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?

A Job? Or a Lifetime Experience? Start Yours Here! A nossa missão é ser uma parte significativa da carreira das nossas pessoas. À medida que crescemos, cresce também a determinação em oferecer a melhor experiência aos nossos colaboradores e clientes e é exatamente isso que nos move. Somos uma empresa portuguesa de consultoria tecnológica com escritórios em Lisboa, Porto e Óbidos e representações no Brasil e Tunísia. Contamos com mais de 13 anos de expertise no mercado, e hoje somos um universo de cerca de 400 pessoas a trabalhar em contexto presencial, remoto ou híbrido em projetos em mais de 20 países. Acreditamos que grandes pessoas fazem empresas de sucesso e por isso mesmo defendemos a valorização, reconhecimento e crescimento dos nossos profissionais. Não queremos ser mais uma linha do teu CV, queremos que connosco vivas uma Lifetime Experience. Apostamos em formações e certificações que confirmam a tua real progressão, na promoção de um saudável work-life balance e na oferta de benefícios com impacto na tua vida pessoal e carreira. O que procuramos <ul><li>Formação superior em Engenharia Informática ou semelhante.</li><li>Bons conhecimentos em Spark/Scala.</li><li>Experiência em SQL, Shell script e Unix.</li><li>Proficiência em Inglês (B2/C1).</li><li>Conhecimentos em Francês são valorizados (B2).</li></ul> Ser Affinity <ul><li>#Affinidade – Criares relações de proximidade e empatia com colegas, clientes e candidatos (e não apenas com tecnologias, linguagens e plataformas). Espírito de equipa e boa disposição;</li><li>#Ambição – Quereres fazer mais e melhor. Vontade de exceder expectativas e evoluir pessoal e profissionalmente;</li><li>#Ação – Energia para fazer acontecer. Mostrares proatividade e capacidade de iniciativa;</li><li>#Aprendizagem – Vontade de evoluir individual e coletivamente e tornares-te um expert no mercado tecnológico.</li></ul> A tua #LifetimeExperience <ul><li>Participar em projetos nacionais e internacionais numa empresa baseada em relacionamentos pessoais, na simplicidade e na eficiência, com uma ação disruptiva no mercado tecnológico;</li><li>Aceder a um plano de carreira e formação personalizado e diretamente proporcional ao teu desempenho e interesse;</li><li>Fazer parte de um ambiente acolhedor, de confiança, respeito e informalidade;</li><li>Integrar as nossas Affinity Communities (de desporto, tecnologia, hobbies, etc.) e participar ativamente em projetos de responsabilidade social e ambiental;</li><li>Tirar partido de um conjunto de benefícios, parcerias, descontos eventos e dinâmicas internas.</li></ul> Para além da tua satisfação profissional queremos proporcionar-te oportunidades de lazer e convívio memoráveis e dignos de uma experiência Affinity. Join the Experience! Envia-nos a tua candidatura e aproveita para nos conhecer e ir acompanhando em: <a>https://www.instagram.com/affinityportugal/</a><a>https://www.linkedin.com/company/2701281/admin/</a><a>https://twitter.com/WithAffinity</a>

????AWS Data Engineer???? A Job? Or a Lifetime Experience? Start Yours Here! Our mission is to be a meaningful part of our people's careers. As we grow, so does our determination to offer the best experience to our employees and clients — and that’s exactly what drives us. We are a Portuguese technology consulting company with offices in Lisbon, Porto and Óbidos, and representations in Brazil and Tunisia. We have over 12 years of market expertise, and today we are a universe of around 400 people working on-site, remotely or in hybrid mode in projects across 20+ countries. We believe that great people make successful companies, and that’s why we stand for the appreciation, recognition and growth of our professionals. We don’t want to be just another line on your CV — we want you to live a Lifetime Experience with us. We invest in training and certifications that confirm your real progression, in promoting a healthy work-life balance, and in offering benefits that impact your personal life and career. #welcometoyourfuture What we’re looking for:☁️ 3+ years of hands-on experience with AWS???? Solid background in building and maintaining data pipelines and ETL workflows???? Experience working with large-scale datasets, both structured and unstructured????️ Familiar with modern data engineering tools (e.g., Spark, Kafka, Airflow, dbt)???? Strong understanding of cloud-native data services and performance optimization✅ Comfortable working in production-grade environments with CI/CD and IaC practices???? Good command of English (spoken and written) for working in an international environment Being Affinity • #Affinity – Creating close and empathetic relationships with colleagues, clients and candidates (and not just with technologies, languages and platforms). Team spirit and good vibes;• #Ambition – Wanting to do more and better. A drive to exceed expectations and evolve personally and professionally;• #Action – Energy to make things happen. Showing proactiveness and initiative;• #Learning – Willingness to grow individually and collectively and to become an expert in the tech market;• #Assertiveness – Transparent and honest communication, always with constructive feedback. Your #LifetimeExperience • Taking part in national and international projects in a company based on personal relationships, simplicity and efficiency, with a disruptive approach to the tech market;• Accessing a career and training plan tailored to your performance and interests;• Being part of a welcoming, trustworthy, respectful and informal environment;• Joining our Affinity Communities (sports, tech, hobbies, etc.) and actively participating in social and environmental responsibility projects;• Taking advantage of a range of benefits, partnerships, discounts, events and internal dynamics. Beyond your professional satisfaction, we want to offer you memorable moments of leisure and connection, worthy of an Affinity experience. Join the Experience! Send us your application and take the opportunity to get to know us and follow along at:<a>https://www.instagram.com/affinityportugal/</a><a>https://www.linkedin.com/company/2701281/admin/</a><a>https://twitter.com/WithAffinity</a>

????Azure Data Engineer???? A Job? Or a Lifetime Experience? Start Yours Here! Our mission is to be a meaningful part of our people's careers. As we grow, so does our determination to offer the best experience to our employees and clients — and that’s exactly what drives us. We are a Portuguese technology consulting company with offices in Lisbon, Porto and Óbidos, and representations in Brazil and Tunisia. We have over 12 years of market expertise, and today we are a universe of around 400 people working on-site, remotely or in hybrid mode in projects across 20+ countries. We believe that great people make successful companies, and that’s why we stand for the appreciation, recognition and growth of our professionals. We don’t want to be just another line on your CV — we want you to live a Lifetime Experience with us. We invest in training and certifications that confirm your real progression, in promoting a healthy work-life balance, and in offering benefits that impact your personal life and career. #welcometoyourfuture What we’re looking for:☁️ 3+ years of hands-on experience with Azure???? Solid background in building and maintaining data pipelines and ETL workflows???? Experience working with large-scale datasets, both structured and unstructured????️ Familiar with modern data engineering tools (e.g., Spark, Kafka, Airflow, dbt)???? Strong understanding of cloud-native data services and performance optimization✅ Comfortable working in production-grade environments with CI/CD and IaC practices???? Good command of English (spoken and written) for working in an international environment Being Affinity • #Affinity – Creating close and empathetic relationships with colleagues, clients and candidates (and not just with technologies, languages and platforms). Team spirit and good vibes;• #Ambition – Wanting to do more and better. A drive to exceed expectations and evolve personally and professionally;• #Action – Energy to make things happen. Showing proactiveness and initiative;• #Learning – Willingness to grow individually and collectively and to become an expert in the tech market;• #Assertiveness – Transparent and honest communication, always with constructive feedback. Your #LifetimeExperience • Taking part in national and international projects in a company based on personal relationships, simplicity and efficiency, with a disruptive approach to the tech market;• Accessing a career and training plan tailored to your performance and interests;• Being part of a welcoming, trustworthy, respectful and informal environment;• Joining our Affinity Communities (sports, tech, hobbies, etc.) and actively participating in social and environmental responsibility projects;• Taking advantage of a range of benefits, partnerships, discounts, events and internal dynamics. Beyond your professional satisfaction, we want to offer you memorable moments of leisure and connection, worthy of an Affinity experience. Join the Experience! Send us your application and take the opportunity to get to know us and follow along at:<a>https://www.instagram.com/affinityportugal/</a><a>https://www.linkedin.com/company/2701281/admin/</a><a>https://twitter.com/WithAffinity</a>

????GCP Data Engineer???? A Job? Or a Lifetime Experience? Start Yours Here! Our mission is to be a meaningful part of our people's careers. As we grow, so does our determination to offer the best experience to our employees and clients — and that’s exactly what drives us. We are a Portuguese technology consulting company with offices in Lisbon, Porto and Óbidos, and representations in Brazil and Tunisia. We have over 12 years of market expertise, and today we are a universe of around 400 people working on-site, remotely or in hybrid mode in projects across 20+ countries. We believe that great people make successful companies, and that’s why we stand for the appreciation, recognition and growth of our professionals. We don’t want to be just another line on your CV — we want you to live a Lifetime Experience with us. We invest in training and certifications that confirm your real progression, in promoting a healthy work-life balance, and in offering benefits that impact your personal life and career. #welcometoyourfuture What we’re looking for:☁️ 3+ years of hands-on experience with Google Cloud Platform (GCP)???? Solid background in building and maintaining data pipelines and ETL workflows???? Experience working with large-scale datasets, both structured and unstructured????️ Familiar with modern data engineering tools (e.g., Spark, Kafka, Airflow, dbt)???? Strong understanding of cloud-native data services and performance optimization✅ Comfortable working in production-grade environments with CI/CD and IaC practices???? Good command of English (spoken and written) for working in an international environment Being Affinity • #Affinity – Creating close and empathetic relationships with colleagues, clients and candidates (and not just with technologies, languages and platforms). Team spirit and good vibes;• #Ambition – Wanting to do more and better. A drive to exceed expectations and evolve personally and professionally;• #Action – Energy to make things happen. Showing proactiveness and initiative;• #Learning – Willingness to grow individually and collectively and to become an expert in the tech market;• #Assertiveness – Transparent and honest communication, always with constructive feedback. Your #LifetimeExperience • Taking part in national and international projects in a company based on personal relationships, simplicity and efficiency, with a disruptive approach to the tech market;• Accessing a career and training plan tailored to your performance and interests;• Being part of a welcoming, trustworthy, respectful and informal environment;• Joining our Affinity Communities (sports, tech, hobbies, etc.) and actively participating in social and environmental responsibility projects;• Taking advantage of a range of benefits, partnerships, discounts, events and internal dynamics. Beyond your professional satisfaction, we want to offer you memorable moments of leisure and connection, worthy of an Affinity experience. Join the Experience! Send us your application and take the opportunity to get to know us and follow along at:<a>https://www.instagram.com/affinityportugal/</a><a>https://www.linkedin.com/company/2701281/admin/</a><a>https://twitter.com/WithAffinity</a>

???? Data Engineer Azure ???? A Job? Or a Lifetime Experience? Start Yours Here!We are a Portuguese technology consulting company with a strong outward look to the rest of Europe. We have 10 years of experience in the market and reached the status of “large company” in 2018. We now have more than 350 associates and we keep growing, with offices in Lisbon, Porto, and Leiria, as well as projects in more than 20 countries. Our company is part of the national top 10, with a growth of 250% in the last years.Work-life balance is part of our DNA. We focus on win-win-win relationships, defining every moment of interaction as an experience with unique conditions. Working with Affinity is a “Lifetime Experience” where you will have the opportunity to demonstrate all your potential and to be successful on every level.#welcometoyourfuture ✅ Mandatory requirements:<ul><li>Experience with cloud platforms and services for data engineering (Azure);</li><li>Proficiency in programming languages like Python, Java, or Scala;</li><li>Use of Big Data Tools as Spark, Flink, Kafka, Elastic Search, Hadoop, Hive, Sqoop, Flume, Impala, Kafka Streams and Connect, Druid, etc.;</li><li>Knowledge of data modeling and database design principles;</li><li>Familiarity with data integration and ETL tools (e.g., Apache Kafka, Talend);</li><li>Understanding of distributed systems and data processing architectures;</li><li>Strong SQL skills and experience with relational and NoSQL databases;</li><li>Experience with version control tools such as Git.</li><li>English (C1)</li></ul> ???? Soft skills we value:<ul><li>Ability to adapt to different contexts, teams and Clients</li><li>Teamwork skills but also sense of autonomy</li><li>Motivation for international projects and ok if travel is included</li><li>Willingness to collaborate with other players</li><li>Strong communication skills</li></ul> Sounds good? Apply now. #DataEnginnering #Azure #AffinityPortugal #TechCareers

???? Data Engineer Google Cloud Platform ???? A Job? Or a Lifetime Experience? Start Yours Here!We are a Portuguese technology consulting company with a strong outward look to the rest of Europe. We have 10 years of experience in the market and reached the status of “large company” in 2018. We now have more than 350 associates and we keep growing, with offices in Lisbon, Porto, and Leiria, as well as projects in more than 20 countries. Our company is part of the national top 10, with a growth of 250% in the last years.Work-life balance is part of our DNA. We focus on win-win-win relationships, defining every moment of interaction as an experience with unique conditions. Working with Affinity is a “Lifetime Experience” where you will have the opportunity to demonstrate all your potential and to be successful on every level.#welcometoyourfuture ✅ Mandatory requirements:<ul><li>Experience with cloud platforms and services for data engineering (GCP);</li><li>Proficiency in programming languages like Python, Java, or Scala;</li><li>Use of Big Data Tools as Spark, Flink, Kafka, Elastic Search, Hadoop, Hive, Sqoop, Flume, Impala, Kafka Streams and Connect, Druid, etc.;</li><li>Knowledge of data modeling and database design principles;</li><li>Familiarity with data integration and ETL tools (e.g., Apache Kafka, Talend);</li><li>Understanding of distributed systems and data processing architectures;</li><li>Strong SQL skills and experience with relational and NoSQL databases;</li><li>Familiarity with cloud platforms and services for data engineering (e.g., AWS S3, Azure Data Factory);</li><li>Experience with version control tools such as Git.</li><li>English (C1)</li></ul> ???? Soft skills we value:<ul><li>Ability to adapt to different contexts, teams and Clients</li><li>Teamwork skills but also sense of autonomy</li><li>Motivation for international projects and ok if travel is included</li><li>Willingness to collaborate with other players</li><li>Strong communication skills</li></ul> Sounds good? Apply now. #DataEnginnering #GoogleCloudPlatform #GCP #AffinityPortugal #TechCareers

A Job? Or a Lifetime Experience? Start Yours Here! A nossa missão é ser uma parte significativa da carreira das nossas pessoas. À medida que crescemos, cresce também a determinação em oferecer a melhor experiência aos nossos colaboradores e clientes e é exatamente isso que nos move. Somos uma empresa portuguesa de consultoria tecnológica com escritórios em Lisboa, Porto e Óbidos e representações no Brasil e Tunísia. Contamos com mais de 11 anos de expertise no mercado, e hoje somos um universo de cerca de 400 pessoas a trabalhar em contexto presencial, remoto ou híbrido em projetos em mais de 20 países. Acreditamos que grandes pessoas fazem empresas de sucesso e por isso mesmo defendemos a valorização, reconhecimento e crescimento dos nossos profissionais. Não queremos ser mais uma linha do teu CV, queremos que connosco vivas uma Lifetime Experience. Apostamos em formações e certificações que confirmam a tua real progressão, na promoção de um saudável work-life balance e na oferta de benefícios com impacto na tua vida pessoal e carreira. O que procuramos <ul><li>Mestrado ou Doutoramento em Engenharia Informática, Matemática ou em áreas semelhantes (Mestrado/Doutoramento em Data Science será valorizado);</li><li>Experiência mínima de 3 anos em funções como Data Scientist ou em funções similares;</li><li>Conhecimentos sólidos em Python (Matplotlib, Seaborn, Plotly);</li><li>Conhecimentos sólidos em SQL Server para extração de dados;</li><li>Experiência em trabalhar com grandes volumes de dados e plataformas cloud</li></ul> Ser Affinity <ul><li>#Affinidade – Criares relações de proximidade e empatia com colegas, clientes e candidatos (e não apenas com tecnologias, linguagens e plataformas). Espírito de equipa e boa disposição;</li><li>#Ambição – Quereres fazer mais e melhor. Vontade de exceder expectativas e evoluir pessoal e profissionalmente;</li><li>#Ação – Energia para fazer acontecer. Mostrares proatividade e capacidade de iniciativa;</li><li>#Aprendizagem – Vontade de evoluir individual e coletivamente e tornares-te um expert no mercado tecnológico.</li></ul> A tua #LifetimeExperience <ul><li>Participar em projetos nacionais e internacionais numa empresa baseada em relacionamentos pessoais, na simplicidade e na eficiência, com uma ação disruptiva no mercado tecnológico;</li><li>Aceder a um plano de carreira e formação personalizado e diretamente proporcional ao teu desempenho e interesse;</li><li>Fazer parte de um ambiente acolhedor, de confiança, respeito e informalidade;</li><li>Integrar as nossas Affinity Communities (de desporto, tecnologia, hobbies, etc.) e participar ativamente em projetos de responsabilidade social e ambiental;</li><li>Tirar partido de um conjunto de benefícios, parcerias, descontos eventos e dinâmicas internas.</li></ul> Para além da tua satisfação profissional queremos proporcionar-te oportunidades de lazer e convívio memoráveis e dignos de uma experiência Affinity. Join the Experience! Envia-nos a tua candidatura e aproveita para nos conhecer e ir acompanhando em:https://www.instagram.com/affinityportugal/https://www.linkedin.com/company/2701281/admin/https://www.facebook.com/affinity.portugal/https://twitter.com/WithAffinity

Affinity Interview Questions

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