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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

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

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?

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Job Title: Python Software EngineerSalary: $200,000 - $260,000Location: San Francisco, CA A well funded Series B startup, partnered with multiple Fortune 500 companies is hiring a Senior Software Engineer to join their Software Engineering GenAI team. On a team of 7 you will be building, scaling, and delivering products to clients while using Python, Rest APIs, Microservices, Distributed Systems, PyTest, and cloud (AWS/Azure/GCP) technologies. If you have experience working with large amounts of data to build scalable products then this role is for you! In this role you will be writing APIs and Product Engineering backend code, building out product features on a day to day basis, while working cross-functionally between teams to build the best large scale distributed systems. Any experience in Large Language Models (LLM) or experience working on an AI-focused team is a huge plus. This is a growing team with a lot of professional growth opportunities, Equity, and it provides a highly collaborative working environment in a space where you can make a deep impact within the AI community. Requirements<ul><li>4+ years of experience building salable Distributed Systems with Python</li><li>Experience with Rest API and Cloud</li><li>NLP and LLM experience desired, but not required</li><li>Bachelor's, Masters, or PhD in STEM field</li></ul> Benefits<ul><li>Medical, Dental, and Vision Insurance</li><li>Equity</li><li>Unlimited Paid Time Off</li><li>Parental Leave</li><li>Daily Lunch Stipend</li><li>Wellness Stipend</li><li>Team building events</li><li>Relocation package (if needed)</li><li>Hybrid flexibility (2 days onsite)</li></ul> If you are interested in learning more about this position or any other roles we may have open, please apply today! Our Commitment to Diversity, Equity, and InclusionSignify’s mission is to empower every person, regardless of their background or circumstances, with an equitable chance to achieve the careers they deserve. Building a diverse future, one placement at a time.<ul><li>Our Recruitment Consultants undergo continuous training in Inclusive Recruitment. As an MSDUK certified business, we're committed to creating diverse candidate shortlists. We organize free networking events for our candidates and meticulously track our diversity initiatives through data and reporting. Together with our clients, we advocate for an equity-first approach to hiring.</li></ul>

????: C++ Senior Software Engineer????: London????: £90-120k base ????I'm looking to recruit a C++ Senior Software Engineer to work on one of the most technologically advanced video systems on the market, delivering cutting-edge AI insights and a user experience 10x better than the competition in the video security space. ????You'll play a crucial role in building and optimizing our edge-computing stack, which powers critical components of our AI video system. You’ll be developing applications that process vision data, deploying machine learning models, and fine-tuning our runtime for maximum performance. Key Responsibilities:<ul><li>Build and optimise edge applications for processing vision data on compute-constrained devices.</li><li>Deploy machine learning models into production.</li><li>Enhance platform performance, focusing on C++ and GPU acceleration.</li><li>Build observability and telemetry tools for edge applications.</li></ul>What We’re Looking For:<ul><li>3+ years of experience writing production software in C++ and Python.</li><li>Expertise in optimising real-time data processing for latency and memory.</li><li>Proficiency with profiling tools (e.g., gdb, Nsight, Valgrind, flame graphs).</li><li>Experience with Docker, and CI/CD pipelines.</li></ul> Why apply???? ?<ul><li>Company equity % in an early-stage startup.</li><li>Work in a world-class team of engineers with experience from top tech companies like Google, Facebook, Microsoft, Lyft, and Toyota</li><li>Flexible PTO & Sick Policy</li><li>Medical, Dental, and Vision insurance</li></ul> Apply to be considered with interviews commencing from the 4th of November.

Job Title: Senior Software Engineering ManagerLocation: Munich, GermanyType: Full-Time About the RoleMy client is looking for a Senior Software Engineering Manager to lead, inspire, and grow their talented team of engineers in Munich. In this role, you will be pivotal in guiding technical strategy, managing day-to-day engineering operations, and ensuring they deliver high-quality products. You will bring both technical expertise in C++ and Python and a proven track record in engineering management, helping their team navigate technical challenges and meet strategic goals. Responsibilities<ul><li>Lead and Manage Teams: Oversee a high-performing team of engineers, fostering a collaborative and growth-oriented environment.</li><li>Technical Leadership: Drive technical initiatives, making informed decisions based on your deep expertise in C++ and Python.</li><li>Product Focus: Confidently represent and communicate our product strategy, vision, and updates, both internally and externally.</li><li>Hands-On Contribution: Engage in technical work when necessary, providing a hands-on approach that supports team problem-solving and innovation.</li><li>Team Growth & Development: Mentor and coach team members, focusing on personal growth and professional development to build a robust engineering team.</li><li>Cross-Functional Collaboration: Work closely with product management, design, and other cross-functional teams to align engineering efforts with company goals.</li><li>Bilingual Communication: Communicate fluently in both German and English to collaborate effectively with team members, stakeholders, and clients across regions.</li></ul>Requirements<ul><li>5+ Years of Engineering Management Experience: Proven track record as an engineering manager, with a demonstrated ability to lead and grow technical teams.</li><li>Strong Technical Background: Proficiency in C++ and Python, with a solid foundation in software development principles.</li><li>Excellent Communication Skills: Ability to clearly articulate complex technical concepts in both German and English.</li><li>Product Mindset: Confident in speaking about product features, updates, and strategy with a variety of stakeholders.</li><li>Team Development: Experienced in mentoring, coaching, and building high-performance engineering teams.</li><li>Hands-On Capability (Preferred): While your primary role is management, a willingness to contribute technically and support the team when needed is a strong plus.</li></ul>

Signify Technology Interview Questions

Signify Technology Interview Guides

Signify Technology Interview Questions

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