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Beacon Street Services Interview Questions

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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?

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

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

Beacon Street Services Salaries by Position

Overview: <img style="display: block; margin-left: auto; margin-right: auto;" src="https://beaconstreetservices.icims.com/icims2/servlet/icims2?module=AppInert&action=download&id=20216&hashed=1160205364" alt="MarketWiseSolutionsCentered_Logo_Color_TM_RGB_iCIMS" width="500" height="156" /> MarketWise Solutions (formerly known as Beacon Street Services) is continuing to build and expand its cloud services platform, the backbone for our data-driven marketing, sales, ecommerce, customer, and billing services. We're currently looking to bring on a Salesforce Software Engineer to help drive continued Salesforce enhancements, but this role will require some experience in other technologies which impact our eco-system including APIs, microservices, and Java applications. This role is perfect for someone who wants to develop systems from concept to fruition that will reach millions of customers using the latest and greatest technologies in our stack, with a focus on microservices. The ideal candidate should enjoy a fast-paced environment and building new products at scale, playing with APIs and data, and discovering and exploring new technologies and ideas. Were building 100%-cloud-native, serverless code on the AWS and Salesforce platforms to support our digital marketing platform. Experience with Amazon Web Services, web development, and REST APIs is ideal, but not necessary. Well help you learn everything you need to know. Our team works hard, works smart, and works together. As a member of our team, you will own software development for a user story from design to deployment. We work with cool, cutting-edge technology like:<ul><li>AWS (Lambda, Step Functions, API Gateway, EC2, SQS, DynamoDB, RDS, S3, Kinesis)</li><li>Salesforce PaaS (Apex, Heroku, Lightning Web Components)</li><li>Java, Angular, TypeScript, Node</li><li>Snowflake database, Looker business analytics</li><li>Event-driven architecture</li></ul> Responsibilities: <ul><li>Design, develop, modify, test, and support highly reliable and large-scale software applications and services for the cloud that serve millions of customers.</li><li>Participate in software planning, design, and architecture sessions and fully own aspects of the technical solution.</li><li>Must be an active coder in your day-to-day duties with an enthusiasm for technology, particularly with software development across multiple languages.</li><li>Experience with and willingness to develop on the Salesforce platform.</li><li>Understand business requirements and translate them into small pieces of a microservice architecture.</li><li>Take accountability for tasks and resolve problems effectively.</li><li>Excellent communication skills (both written and verbal), with the ability to convey technical issues clearly across multiple functional teams.</li><li>Ability to work and thrive in a faced-paced environment. </li><li>Team oriented, with experience in Agile principles.</li></ul> Qualifications: <div class="wpb_text_column wpb_content_element about-first-pera"><div class="wpb_wrapper"><div class="wpb_text_column wpb_content_element about-first-pera"><div class="wpb_wrapper"><div class="wpb_text_column wpb_content_element about-first-pera"><div class="wpb_wrapper"><ul><li>BS or MS Degree in Computer Science or a similar field is desired, but not required; you should understand data structures and algorithms. </li><li>3+ years of professional experience developing software on the Salesforce platform (e.g., Apex, LWC, Communities).</li><li>Solid Java programming and SQL query skills.</li><li>Desire and ability to write clean, beautiful code, including unit tests.</li><li>Passion for learning and adopting new technology.</li><li>Obsession with customer service and delivering business value. </li><li>Strong customer focus, ownership, urgency, and drive.</li><li>Experience with AWS, a plus.</li><li>Experience with Angular, ReactJS, a plus.</li></ul> <div class="wpb_text_column wpb_content_element about-first-pera"><div class="wpb_wrapper"><div class="wpb_text_column wpb_content_element about-first-pera"><div class="wpb_wrapper">About MarketWise SolutionsFormerly known as Beacon Street Services, MarketWise Solutions is the services division of MarketWise LLC, providing world-class shared services, including, technical systems and expertise, legal, accounting and human resources.</div></div><div class="wpb_text_column wpb_content_element vc_custom_1553872657448 about-hide-content"><div class="wpb_wrapper"> Our mission is to provide MarketWise the systems, support and information to do what they do best which is to provide the best in class subscription-based publications of financial information and software to millions of investors globally. The affiliate companies under MarketWise provide a broad range of services and opinions which means that one size does not fit all. MarketWise Solutions mirrors that philosophy by providing cutting edge, multi-tenant systems and services implemented by some of the best and brightest people in their respective fields.</div></div></div></div> Take a virtual tour of our Baltimore, MD office <a href="https://www.youtube.com/watch?v=nu7H7TToSck&feature=youtu.be" target="_blank" rel="noopener">here</a>.</div></div></div></div></div></div> Our commitment:As an employer committed to equal opportunity and a diverse workforce, all qualified applicants will receive consideration without regard to race, color, religion, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

Overview: <img style="display: block; margin-left: auto; margin-right: auto;" src="https://beaconstreetservices.icims.com/icims2/servlet/icims2?module=AppInert&action=download&id=36&hashed=1123752724" alt="TRADESMITH LOGO " /> TradeSmith is hiring a Senior Quantitative Analyst to add to our growing company. This person will work to create, explore, and enhance financial models and algorithms within the TradeSmith universe. This department is collecting extraordinary amounts of data and is in need of someone with an in-depth understanding of financial models and terms to write solutions that will identify new trends. This person should have a strong background in SQL; experience in Python would be beneficial. The successful candidate will be open to aggregate, normalize, and clean data. The ideal fit is an engineer a demonstratable Data Science experience in a Financial Services environment. Then, through data extraction from the warehouse, work with our financial researchers, editors and marketing to craft and deliver various financial market reports, algorithms, and portfolio/strategy backtests. Responsibilities: <ul><li>Work with key executives from multiple teams to understand problems, identify opportunities and present findings</li><li>Identify predictive features for those problems/opportunities and run them through ML algorithms within a predictive analytics framework, Data Robot</li><li>Extract the data required from the Data Warehouse (Snowflake) or other systems as needed, either through direct SQL extracts or other frameworks provided such as Looker, Tableau, etc.</li><li>Create backtests and reports on various financial models, and algorithms</li><li>Explore and enhance TradeSmith's deep financial data by crafting custom algorithms or indicators based on market data and trends</li><li>Perform other tasks as needed within the broader Data and BI teams.</li><li>Examples include, visualization tasks, BI meta data model development, data loading, data cleansing, etc.</li></ul> Qualifications: <ul><li>BS or MS degree in Data Science or related quantitative field</li><li>A minimum of 2 years work experience within Data Science</li><li>Highly proficient in SQL</li><li>Python coding experience</li><li>Comfortable working within a Predictive Analytics Framework</li><li>Excellent communication skills</li><li>Finance Technology background preferred</li><li>Comfortable with shifting priorities and a fast-paced work environment</li><li>Sedentary work that primarily involves sitting/standing</li><li>Visual acuity for reading and using the computer</li><li>Ability to hear</li><li>Ability to freely move about the office or remote working environment</li><li>Ability to use the phone/computer/keyboard/mouse/general office equipment for extended periods of time</li><li>Ability to communicate with others in order to exchange information</li><li>Fluency in the English language</li></ul> About TradeSmith TradeSmith is the leading Wealth Tech division of MarketWise. TradeSmith began as a simple way to track portfolios using trailing stops, and has evolved into a powerful suite of risk-management and portfolio analysis tools. Since 2005, weve been optimizing the powerful, proprietary algorithms behind our portfolio management software. This suite of tools features volatility-based buy and sell alerts, stock screener tools, a robust ratings system, and a groundbreaking options trading tool. TradeSmith's tools can be used on stocks, cryptocurrencies, commodities and funds to help limit risk and maximize upside. We track over 2.5 Million securities and over $20 billion in invested capital. TradeSmith empowers individual, self-directed investors by giving them a tremendous edge in the markets. TradeSmith believes that advanced market insights and user-friendly tools go hand-in-hand to create lasting wealth. Our commitment:As an employer committed to equal opportunity and a diverse workforce, all qualified applicants will receive consideration without regard to race, color, religion, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

Beacon Street Services Interview Questions

Beacon Street Services Interview Guides

Beacon Street Services Interview Questions

Beacon Street Services Salaries by Position

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