Prepare for and practice interview questions from Gemini.

Gemini Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

Gemini Interview Guides

<p>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.</p>

<p>What factors could have biased this result, and what would you look into?</p>


<p>What could potentially bias the average boarding time in favor of an airline that only flies domestically?</p>

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?

<p>You are testing hundreds of hypotheses with many <em>t</em>-tests. What considerations should be made?</p>


<p>What is a key disadvantage of the F-test when compared to multiple t-tests?</p>

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?

<p>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.</p>

<p>How would you assess the validity of the result?</p>


Experiment Validity

A/B Testing & Experimentation

Gemini Salaries by Position

<h5>About the Company </h5><p>Gemini is a global crypto and Web3 platform founded by Cameron and Tyler Winklevoss in 2014, offering a wide range of simple, reliable, and secure crypto products and services to individuals and institutions in over 70 countries. Our mission is to unlock the next era of financial, creative, and personal freedom by providing trusted access to the decentralized future. We envision a world where crypto reshapes the global financial system, internet, and money to create greater choice, independence, and opportunity for all bridging traditional finance with the emerging cryptoeconomy in a way that is more open, fair, and secure. As a publicly traded company, Gemini is poised to accelerate this vision with greater scale, reach, and impact. </p><h5>The Department: Data </h5><p>At Gemini, our Data Team is the engine that powers insight, innovation, and trust across the company. We bring together world?class data engineers, platform engineers, machine learning engineers, analytics engineers, and data scientists all working in harmony to transform raw information into secure, reliable, and actionable intelligence. From building scalable pipelines and platforms, to enabling cutting?edge machine learning, to ensuring governance and cost efficiency, we deliver the foundation for smarter decisions and breakthrough products. We thrive at the intersection of crypto, technology, and finance, and were united by a shared mission: to unlock the full potential of Geminis data to drive growth, efficiency, and customer impact. </p><h5>The Role: Principal Data Scientist, Machine Learning (Growth) </h5><p>As a Principal Data Scientist focused on Machine Learning for Growth, youll play a key role in improving our customer experience from onboarding to new product adoption. Youll work cross?functionally with product, engineering, and operations to design and deploy models that improve customer onboarding and product adoption across Geminis ecosystem. Youll own the full machine learning lifecycle from identifying growth signals and engineering features to training, evaluating, and deploying models in production. Youll partner with stakeholders across Marketing, Exchange Growth, and Credit Card to profitably improve customer growth. This is a high?impact, hands?on individual contributor role with opportunities for technical leadership and mentorship. </p><p>This role is required to be in person twice a week at our San?Francisco or New?York?City. </p><h5>Responsibilities </h5><br> <ul><li>Analyze large, complex datasets to identify opportunities to proactively improve onboarding and product adoption opportunities and engineer predictive features using internal and external data sources. </li><li>Design, train, and deploy machine learning models to identify growth opportunities, including lifetime value, marketing channel optimization, and product cross?sell models. </li><li>Build and maintain end?to?end data and model pipelines for marketing and growth, including onboarding & adoption anomaly detection and behavioral profiling of growth drivers. </li><li>Evaluate model performance through experiments, backtesting, and continuous monitoring to improve adoption rates and improve customer acquisition cost. </li><li>Partner with product managers, engineers, and customer service operations to translate model outputs into effective growth strategies and user?facing features. </li><li>Communicate findings and recommendations to technical and non?technical audiences, influencing strategy and prioritization. </li><li>Mentor and guide more junior and mid?level data scientists & machine learning engineers: lead code reviews, design reviews, and best practice evangelism. </li><li>Help recruit and onboard new talent, shaping the future of Geminis machine learning discipline. </li><li>Stay up to date on new tools, technologies, and machine learning approaches, bringing proposals and proof?of?concepts when appropriate. </li><br> </ul><h5>Minimum Qualifications </h5><ul><li>10+ years of experience (7+ years with PhD) applying data science and machine learning in financial, payments, or B2C platforms. </li><li>5+ years of experience developing, deploying, and maintaining production?grade ML models, ideally for real?time or large?scale applications. </li><li>Strong proficiency in Python and relevant modeling libraries (eg, scikit?learn, xgboost, TensorFlow, PyTorch) and SQL. </li><li>Experience with data processing and model lifecycle tools such as Databricks, SageMaker, Snowflake, MLflow, or similar. </li><li>Familiarity with orchestration and data pipeline frameworks (e.g., Airflow, Spark). </li><li>Demonstrated ability to work cross?functionally with product, engineering, and operations teams. </li><li>Excellent communication skills and the ability to translate complex technical concepts into actionable insights. </li><br> </ul><h5>Preferred Qualifications </h5><ul><li>Masters degree or equivalent experience in a quantitative field. </li><li>Domain expertise in crypto / blockchain / Web3 data (on?chain data, DeFi protocols, transaction analytics). </li><li>Experience with lifetime value, marketing mix, or product recommendation models in fintech, banking, or crypto. </li><li>Understanding of model governance, interpretability, and fairness in regulated financial contexts. </li><li>Experience mentoring data scientists / machine learning engineers or contributing to technical best practices within a team. </li><li>Proven experience in recruiting, mentoring, leading design discussions, and influencing data science and machine learning best practices across teams. </li><br> </ul><br> <h5>It Pays to Work Here </h5><p>The compensation & benefits package for this role includes: </p><ul><li>Competitive starting salary </li><li>A discretionary annual bonus </li><li>Long?term incentive in the form of a new hire equity grant </li><li>Comprehensive health plans </li><li>401K with company matching </li><li>Paid Parental Leave </li><li>Flexible time off </li><br> </ul><br> <h5>Salary Range </h5><p>The base salary range for this role is between $192,500 - $275,000 in the State of New?York, the State of California and the State of Washington. This range is not inclusive of our discretionary bonus or equity package. When determining a candidates compensation, we consider a number of factors including skillset, experience, job scope, and current market data. </p><p>In the United States, we offer a hybrid work approach at our hub offices, balancing the benefits of in?person collaboration with the flexibility of remote work. Expectations may vary by location and role, so candidates are encouraged to connect with their recruiter to learn more about the specific policy for the role. Employees who do not live near one of our hubs are part of our remote workforce. </p><p>At Gemini, we strive to build diverse teams that reflect the people we want to empower through our products, and we are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or Veteran status. Equal Opportunity is the Law, and Gemini is proud to be an equal opportunity workplace. If you have a specific need that requires accommodation, please let a member of the People Team know. </p>#J-18808-Ljbffr

<h5>Overview </h5><p>Gemini is a global crypto and Web3 platform founded by Cameron and Tyler Winklevoss in 2014, offering a wide range of simple, reliable, and secure crypto products and services to individuals and institutions in over 70 countries. Our mission is to unlock the next era of financial, creative, and personal freedom by providing trusted access to the decentralized future. We envision a world where crypto reshapes the global financial system, internet, and money to create greater choice, independence, and opportunity for all bridging traditional finance with the emerging cryptoeconomy in a way that is more open, fair, and secure. As a publicly traded company, Gemini is poised to accelerate this vision with greater scale, reach, and impact. </p><p><strong>The Department: Onchain</strong> - Our teams mission is to enable Geminis internal and external users to seamlessly interact with blockchain networks in a stable, secure, straightforward way. The Onchain group builds Geminis onramps to the blockchain from CSS to ECDSA. Our teams are solving problems across the entire crypto product user journey, including the user experience of crypto transfers, custody and staking down to the lowest levels of blockchain protocols and cryptographic signing algorithms. Our systems facilitate on-chain transactions for billions of USD worth of digital assets using state-of-the-art technology and security. We have openings across many of our teams, including Asset Transfers, Staking, Cloud Wallets, Protocols, Signing, and Blockchain Infrastructure. The teams are small, capable, agile, and have extensive ownership of the systems and solutions. We are continually growing, solving unique problems, and discovering new opportunities. </p><p><strong>The Role: Senior Software Engineer</strong> </p><p>As a Senior Software Engineer in the Onchain domain, you will work with talented engineers to enhance and expand the features of our blockchain-based products and the supporting platforms, including the Staking, Transfers, and Custody products. You will participate in solutioning for new features and products, helping to drive innovation to bring new value to users. You will contribute to the technical direction and engineering culture within your product team, leveling-up junior engineers in the process. You will also help drive operational excellence in our systems and processes. Our goal is to design, develop, deploy, and support user-facing distributed systems that serve millions of users, with a focus on safety, security, and user experience. We believe in fixing whats broken, automating wherever possible, and constantly improving our processes. </p><p>This role is required to be in person twice a week at either our San Francisco, CA or New York City, NY office. </p><h5>Responsibilities </h5><ul> <li>Participate in the design, development, and deployment of new features for your team </li><li>Research and integrate new blockchain technologies, concepts, and solutions </li><li>Contribute to the high availability, reliability, and security of our systems </li><li>Participate in code reviews, mentor junior engineers, and share best practices </li><li>Stay up-to-date with emerging trends and technologies in the crypto and blockchain space </li></ul> <h5>Minimum Qualifications </h5><ul> <li>Bachelors or Masters degree in Computer Science, Engineering, or a related field </li><li>5+ years of experience in software development with typed languages such as: Scala, Java or C# C++ </li><li>Proven track record of developing and maintaining large-scale, distributed systems </li><li>Experience with agile development methodologies and a commitment to following best practices in code health, testing, and maintainability </li><li>Excellent communication and teamwork abilities </li><li>Strong problem-solving skills and the ability to work under pressure </li><li>Familiarity with cloud technologies and microservices architecture </li></ul> <h5>Preferred Qualifications </h5><ul> <li>Experience in the crypto or fintech industry </li><li>Understanding of blockchain technologies and crypto wallets </li><li>Leadership experience or a strong interest in mentoring junior team members </li></ul> <h5>It Pays to Work Here </h5><ul> <li>Competitive starting salary </li><li>A discretionary annual bonus </li><li>Long-term incentive in the form of a new hire equity grant </li><li>Comprehensive health plans </li><li>401K with company matching </li><li>Paid Parental Leave </li><li>Flexible time off </li></ul> <h5>Salary Range </h5><p>The base salary range for this role is between $140,000 - $200,000 in the State of New York, the State of California and the State of Washington. This range is not inclusive of our discretionary bonus or equity package. When determining a candidates compensation, we consider a number of factors including skillset, experience, job scope, and current market data. </p><h5>Work Model </h5><p>In the United States, we offer a hybrid work approach at our hub offices, balancing the benefits of in-person collaboration with the flexibility of remote work. Expectations may vary by location and role, so candidates are encouraged to connect with their recruiter to learn more about the specific policy for the role. Employees who do not live near one of our hubs are part of our remote workforce. </p><h5>Equal Opportunity </h5><p>At Gemini, we strive to build diverse teams that reflect the people we want to empower through our products, and we are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or Veteran status. Equal Opportunity is the Law, and Gemini is proud to be an equal opportunity workplace. If you have a specific need that requires accommodation, please let a member of the People Team know. </p>#J-18808-Ljbffr

<p><strong>About the Company</strong> </p><p>Gemini is a global crypto and Web3 platform founded by Cameron and Tyler Winklevoss in 2014, offering a wide range of simple, reliable, and secure crypto products and services to individuals and institutions in over 70 countries. Our mission is to unlock the next era of financial, creative, and personal freedom by providing trusted access to the decentralized future. We envision a world where crypto reshapes the global financial system, internet, and money to create greater choice, independence, and opportunity for all bridging traditional finance with the emerging cryptoeconomy in a way that is more open, fair, and secure. </p><p><strong>The Department: Platform</strong> </p><p>Our Platform organizations purpose is to enable Gemini to scale effectively and empower our engineering teams to focus on building innovative financial products and experiences for individuals around the world. Platform focuses around building a scalable and secure foundations platform, enabling Engineering to deploy, validate, and operate their services in production, improve resiliency of the service and increase organizational efficiency by reducing operational toil and increase system efficiency through architectural evolution. </p><p>The Client Platform team provides a horizontal function that supports and maintains core client development for web and mobile, testing infrastructure, frontend CI/CD pipeline development, maintaining and expanding usage of our foundational design system library, and providing standards for future client development. The teams mission is to be the force multiplier for other client teams so that they can deliver with quality and speed. </p><p><strong>The Role:</strong> <strong>Senior Software Engineer (Mobile)</strong> </p><p>You will be a core part of leading Geminis mobile client development platform, both by contributing to and adopting modern tooling for the mobile client from both a client architecture and its CI process, working cross-functionally across Geminis engineering teams to influence, and improve our development practices and culture. </p><p>This role is required to be in person twice a week at either our San Francisco, CA or New York City, NY office. </p><p><strong>Responsibilities:</strong> </p><ul> <li>Collaborate with cross-functional teams design, develop, and deliver high-quality mobile applications. </li><li>Lead architectural initiatives to enhance app performance, scalability, and reliability. </li><li>Establish and advocate for best practices in mobile development, code quality, and security standards. </li><li>Develop efficient and reusable UI components while ensuring maintainability and reliability. </li><li>Scope and independently implement features, making informed design and engineering decisions. </li><li>Continuously monitor app performance, utilizing observability tools to identify and resolve issues. </li><li>Improve developer experience through scalable app architectures and refined development processes. </li><li>Conduct meaningful code reviews and mentor team members to foster technical growth and innovation. </li><li>Partner with stakeholders to define and execute on architectural rollout strategies. </li><li>Stay updated on industry trends, tools, and technologies to incorporate best practices into the development process. </li><li>Address cross-team engineering challenges, contributing to the overall growth and success of the organization. </li></ul> <p><strong>Minimum Qualifications:</strong> </p><ul> <li>4+ years of experience in mobile development, including 2+ years with React Native, building scalable mobile applications. </li><li>Proficient in JavaScript/TypeScript and capable of working with native mobile platforms (Swift/Objective-C and/or Java/Kotlin) as needed. </li><li>Expertise in React Native, navigation libraries (especially React Navigation), lifecycles, state management, and performance optimization. </li><li>Demonstrable experience in debugging, framework migrations, refactoring, and adopting mobile best practices. </li><li>Familiarity with CI processes (e.g., GitHub Actions) and automated testing (unit, integration, and end-to-end). </li><li>Able to quickly debug and address mobile performance related issues. </li><li>Knowledge of mobile best practices and stay informed about innovations in the mobile industry and have the ability to bring in adoption for the same. </li><li>Deep understanding of engineering excellence, operational excellence, and data-driven decision-making. </li><li>Strong collaboration skills and ability to prioritize effectively in dynamic environments. </li></ul> <p><strong>Preferred Qualifications:</strong> </p><ul> <li>Strong understanding of UX/UI concepts with a proven ability to contribute to design and product decisions. </li><li>Experience using data to influence product decisions. </li><li>Experience working on a Platform team. </li><li>Experience with animation libraries like Reanimated and/or Skia. </li><li>Experience with implementing Design System components. </li><li>Experience with shared codebases between web and mobile. </li><li>Knowledge of crypto and/or blockchain. </li></ul><strong>It Pays to Work Here</strong> The compensation & benefits package for this role includes: <ul><li>Competitive starting salary </li><li>A discretionary annual bonus </li><li>Long-term incentive in the form of a new hire equity grant </li><li>Comprehensive health plans </li><li>401K with company matching </li><li>Paid Parental Leave </li><li>Flexible time off </li></ul> <p><strong>Salary Range</strong>: The base salary range for this role is between $140,000 - $200,000 in the State of New York, the State of California and the State of Washington. This range is not inclusive of our discretionary bonus or equity package. When determining a candidates compensation, we consider a number of factors including skillset, experience, job scope, and current market data. </p><p>In the United States, employees within the New York, Seattle, San Francisco, and Miami metropolitan areas are expected to work from the designated office on a hybrid cadence, unless there is a job-specific requirement to be in the office every work day. We believe our hybrid approach for those near our NYC, Seattle, San Francisco, and Miami offices increases productivity through more in-person collaboration where possible. Employees outside of these areas are considered part of our remote-first workforce. </p><p>At Gemini, we strive to build diverse teams that reflect the people we want to empower through our products, and we are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or Veteran status. Equal Opportunity is the Law, and Gemini is proud to be an equal opportunity workplace. If you have a specific need that requires accommodation, please let a member of the People Team know. </p><p>#LI-JS2 </p>#J-18808-Ljbffr

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
Experiment Validity	A/B Testing & Experimentation	Medium	Very High

Gemini Interview Questions

Gemini Interview Guides

Gemini Interview Questions

Gemini Salaries by Position

Gemini Opening Jobs