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Harnham Interview Questions

data and analytics recruitment is our core business and we’re proud to say, our customers believe we’re good at it. in our most recent customer satisfaction survey, 95% of respondents said that they would recommend harnham. harnham has actively chosen to focus on data and analytics, we’ve immersed ourselves in this market and are now an integral part of this business community. our capability has grown to provide recruitment services and advice across the marketing analytics, credit risk, data science, data and technology and digital sectors.

data and analytics recruitment is our core business and we’re proud to say, our customers believe we’re good at it. in our most recent customer satisfaction survey, 95% of respondents said that they would recommend harnham. harnham has actively chosen to focus on data and analytics, we’ve immersed ourselves in this market and are now an integral part of this business community. our capability has grown to provide recruitment services and advice across the marketing analytics, credit risk, data science, data and technology and digital sectors.

Overview

Harnham 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

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?

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?

Harnham Salaries by Position

FOUNDING SOFTWARE ENGINEER ARTIFICIAL INTELLIGENCE NYC METRO AREA $130,000-$150,000 + EQUITY THE COMPANY This preseed startup is transforming the way inbound sales are managed through an innovative AI-powered agent. By automating routine sales tasks and streamlining customer interactions, the company enables sales teams to focus on what matters most...closing deals. THE ROLE - Founding Software Engineer The Founding Software Engineer will take charge of developing the company's core AI agent, playing a critical role in shaping both the product and the technology stack. This is a unique opportunity for someone who thrives in a startup environment, where flexibility, ownership, and adaptability are essential. The role requires working across the full stack, driving the technical direction of the product while contributing hands-on to its development. Further responsibilit <ul> <li>Lead the design and architecture of the AI chatbot, ensuring seamless automation for inbound sales. </li><li>Collaborate with the engineering team to develop and maintain both front-end and back-end systems. </li><li>Utilize Python and TypeScript, while leveraging cloud services like AWS and GCP to ensure scalable, high-performance solutions. </li><li>Work closely with cross-functional teams, including sales and marketing, to understand user needs and deliver impactful features. </li><li>Ensure code quality and reliability through best practices in testing, documentation, and version control. </li></ul>SKILLS & REQUIREMENTS <ul> <li>Full-stack engineering experience, with a focus on delivering scalable, user-centric applications. </li><li>Strong skills in Python, TypeScript, React, PostgreSQL, Docker, Kubernetes, Terraform, and AWS. </li><li>Experience building products from the ground up, particularly in a startup or fast-paced environment. </li><li>Comfort working in an evolving, dynamic space where you'll need to wear multiple hats. </li><li>Passion for building AI or ML-driven solutions from scratch (0-1 experience). </li><li>Strong communication skills and the ability to collaborate across teams to translate technical needs into business outcomes. </li><li>Previous startup experience is highly valued, and the ability to thrive in a fast-paced, hands-on role is essential. </li><li>Machine learning experience is a plus </li></ul> THE BENEFITS As the Founding Engineer, you will receive a base of up to $150,000, as well as significant equity. HOW TO APPLY Please register your interest by sending your resume to Danny Macdonald via the Apply link on this page. KEYWORDS Python, TypeScript, React, PostgreSQL, Docker, Kubernetes, Terraform, AWS, AI, Chatbot, Full-stack, Startup

About the Company:
The company is a leader in delivering cutting-edge business and technology solutions, known for its commitment to innovation and excellence. With a focus on data and analytics, the company fosters a culture that encourages growth, collaboration, and a drive to solve complex business challenges. As a Senior Principal Business Analyst, you'll play a pivotal role in driving data-driven strategies across the organization.
Role Overview:
The Senior Principal Business Analyst will be responsible for leading data and analytics initiatives that support business objectives. This is a highly strategic role that requires expertise in analyzing business processes, translating business needs into actionable data solutions, and advising stakeholders on data-driven decisions. This is not a hands-on technical role, but rather one focused on leveraging data analytics to solve business problems, driving change, and influencing decision-making at a strategic level.
Key Responsibilities:
Strategic Consultation:  Work closely with Product Owners and stakeholders to define and implement data and analytics solutions that align with business goals.
Business Process Analysis:  Conduct thorough analysis of current business processes, identify gaps, and recommend improvements leveraging data solutions.
Data Reporting & Analysis:  Utilize tools like SQL, PowerBI, Tableau, and Excel to analyze business performance, validate assumptions, and generate actionable insights.
Requirements Gathering:  Lead the documentation of business requirements, use stories, and technical specifications to support the delivery of data-driven solutions.
Continuous Improvement:  Collaborate with teams through the entire product lifecycle, from conception and testing to deployment and ongoing enhancement of data analytics solutions.
Collaboration:  Work across departments and with external providers to ensure data integrity and alignment with strategic goals.
Skills & Experience Needed to Succeed:
Educational Background:  Bachelors degree in Computer Science, Data Science, Mathematics, Engineering, or a related field.
Experience:  8+ years of experience as a Business Analyst or in a similar role, particularly in the data and analytics domain.
Tools & Techniques:  Proficiency in SQL, PowerBI, Tableau, and Excel for data reporting and analysis.
Agile Methodology:  Solid understanding of Agile development practices and experience working in an Agile or hybrid environment.
Business Process Analysis:  Expertise in documenting and analyzing business requirements and process modeling to implement effective solutions.
AI & ML Knowledge:  Experience working on AI/ML projects and understanding how data analytics can improve business processes.
Communication:  Exceptional communication skills to collaborate across teams and articulate complex data solutions clearly to non-technical stakeholders.
Key Selling Points:
Career Growth:  The company offers significant opportunities for personal development and leadership advancement.
Impactful Role:  As a Senior Principal Business Analyst, you'll have the chance to influence major data-driven business decisions.
Collaborative Culture:  Work in an environment that values innovation, teamwork, and input from all associates.
Competitive Compensation:  Attractive salary package, including a base salary ranging from $140k to $190k, along with a 15% performance-based bonus.
Comprehensive Benefits:  A full range of benefits including medical, dental, and vision insurance, wellness programs, retirement plans, and generous paid leave.
Work-Life Balance:  Enjoy a hybrid work schedule with 4 days in the office and 1 day of remote work each week.
If you're ready to take the next step in your career and make a significant impact in a forward-thinking company, this role could be the perfect fit for you. Apply now to join a team that values your expertise and drives innovation through data and analytics.

Senior Data Scientist - Gambling Industry Location: NYC Metro Area (Hybrid) Salary: $130,000 - $150,000 About the Opportunity: Harnham is partnering with an exciting client in the gambling industry looking for a senior data scientist to join their growing analytics team. This is a fantastic opportunity for someone who thrives in a data-driven environment and wants to have a real impact on business outcomes. The Role: In this position, you'll leverage your expertise in Python, SQL, and top-tier data visualization tools to create actionable dashboards, predictive models, and data-driven strategies. You'll play a key role in analyzing player behaviors, optimizing customer engagement, and driving revenue growth. Key Responsibilities: <ul><li>Build and implement predictive models and data models to solve complex business challenges.</li><li>Develop clear and impactful dashboards using a leading visualization tool (e.g., Tableau, Power BI, or Looker).</li><li>Perform in-depth data analysis and modeling using Python and SQL to uncover trends and opportunities.</li><li>Collaborate with cross-functional teams to translate data into strategic recommendations.</li><li>Communicate insights effectively to technical and non-technical stakeholders.</li></ul> What They're Looking For: <ul><li>Strong experience in a senior data scientist or similar role.</li><li>Proficiency in Python and SQL for data manipulation, modeling, and analysis.</li><li>Hands-on experience with data visualization tools to build dashboards and present findings.</li><li>Expertise in predictive modeling and data modeling techniques.</li><li>Excellent problem-solving skills and the ability to deliver actionable insights.</li><li>A passion for the gambling or gaming industry is a plus!</li></ul> What's on Offer: <ul><li>Competitive basic salary: $130,000 - $150,000 (depending on experience).</li><li>A chance to work in a fast-paced, innovative environment with a forward-thinking team.</li><li>Hybrid flexibility in the NYC Metro Area.</li><li>Significant opportunities for career growth and professional development.</li></ul> If you're ready to take the next step in your data science career and join a dynamic organization at the forefront of the gambling industry, apply now!

SOFTWARE ENGINEERWEB3 STARTUPREMOTE - USA$160,000 - $200,000 THE COMPANY We are working with an innovative Web3 startup that is rapidly expanding in the decentralized finance space. This forward-thinking company is looking to hire a Software Engineer to take full ownership of production-level projects, including backend distributed computing and infrastructure. You will be writing code in your first week and taking full ownership of key projects within the first month. THE ROLE - SOFTWARE ENGINEER <ul><li>Own production-level projects end to end in the blockchain space</li><li>Lead backend distributed computing and infrastructure efforts (using Docker, Kubernetes, and AWS)</li><li>Push your first line of code within your first week and own key projects by the end of your first month</li><li>Backend development primarily in Golang</li></ul> SKILLS AND REQUIREMENTS <ul><li>Must be Golang expert</li><li>BS/MS in Computer Science or a related field</li><li>Experienced in the blockchain and Web3 space </li><li>Proficiency with Kubernetes, Docker, and cloud infrastructure (especially AWS)</li><li>Proven experience building, owning, and operating high-scale distributed systems</li><li>Strong knowledge of software engineering best practices (coding standards, code reviews, source control, build processes, automated testing)</li></ul> THE BENEFITS The Software Engineer role offers a competitive salary range of $160,000 - $200,000, depending on experience, along with equity in the company. HOW TO APPLY Please register your interest by sending your resume to Malia Jalbert via the Apply link on this page. KEYWORDS Blockchain, Golang, Backend Engineer, Docker, Kubernetes, AWS, Distributed Systems, Software Engineering, Decentralization, Zero-Knowledge Proofs, Web3, Cryptocurrency, Ethereum, DeFi

LEAD SOFTWARE ENGINEER  AI AGENT STARTUP  REMOTE (NYC)  $130,000 - $150,000 + EQUITY

THE COMPANY We are partnering with an early-stage AI startup, that is developing an AI agent to automate inbound sales tasks. Their innovative AI agent helps sales teams by building rapport with customers, streamlining the sales process, and eliminating administrative busywork. The company is poised for global growth and currently has a small, dedicated team of six people.

THE ROLE - Lead Software Engineer As the Lead Software Engineer, you will work directly with the CEO and Head of Engineering to develop and scale the AI chatbot. You'll be responsible for backend-heavy full stack development, focusing on enhancing the AI agent's capabilities. Responsibilities include:
Leading engineering efforts for scaling the AI platform
Implement scalable solutions using Python and TypeScript, leveraging cloud services such as AWS and GCP
Focusing on backend development while contributing to full stack projects
Collaborating with a small, dynamic team to drive product development
Reporting directly to the CEO
SKILLS AND REQUIREMENTS     Commercial software engineering experience
Strong full stack development skills, with a focus on backend technologies
Proficiency in Python, Typescript, React, AWS, Terraform, Kubernetes
Experience working in a startup environment (taking projects from 0-1)
Machine learning experience is a plus, but not required

THE BENEFITS This fully remote role offers a competitive salary of $150,000 and equity, with potential for higher equity based on seniority. While the role is currently remote, the company prefers candidates based in the NYC area, as it may eventually transition to hybrid or onsite.

HOW TO APPLY If you're interested in this opportunity, please send your resume to Malia Jalbert via the application link below.

KEYWORDS  Lead Software Engineer, AI, Chatbot, Full Stack, Backend, Inbound Sales Automation, Remote, Startup, Equity, Python, Kubernetes, AWS, Typescript

Hello, do you want to be a part of a team that strives everyday to perform at their very best? Are you interested in automotive industry, resorts and other fast growing markets. We are looking for someone who has solid business or data analyst experience and can provide insight on how we can become more profitable. Provide clear and concise insight as to why you make a business recommendation. Communication is everything in this role! Day to day responsibilities <ul><li>Make sense of large and complex data</li><li>Provide business insight and present to stakeholders </li><li>Performs data analysis on different data sources, consolidating multiple data sets and analysing the data accurately and efficiently.</li><li>Performs business process analysis to define how data and analytic solutions should be configured to meet those needs.</li><li>Collaborates with internal customers to ensure user requirements are complete and concise, confirming that changes and enhancements meet technical specifications and user requirements.</li></ul> Skills and Experience <ul><li>Comfort with SQL, Python, Power BI, Tableau and Excel </li><li>Proven track record as a business analyst, project manager or data scientist </li><li>Bachelors degree in applicable field </li><li>Present data and be clear, concise and convincing when giving insight or recommendations </li></ul> Benefits <ul><li>Hybrid work schedule with one day fully remote</li><li>Competitive salary, along with a bonus</li><li>Vehicle program </li><li>Work with a competitive and eager team </li></ul>

CHIEF DATA OFFICER LILLE, FRANCE 90-100K€ + bénéficesVous souhaitez rejoindre une société établie et piloter une transformation data majeure dans le secteur retail ?Nous recherchons un Chief Data Officer pour structurer et déployer une stratégie data innovante au sein d'une organisation en pleine mutation et développement pour 2025.VOTRE RÔLE<ul><li>Définir une vision claire pour la gestion des données.</li><li>Mettre en place une gouvernance robuste garantissant qualité, fiabilité et accessibilité.</li><li>Créer une cartographie exhaustive des données pour maximiser leur impact business.</li><li>Recruter, structurer et diriger une équipe d'experts (data engineers, data scientists, analysts).</li><li>Favoriser la montée en compétence et l'engagement de vos collaborateurs. </li><li>Comprendre et anticiper les enjeux spécifiques du retail (expérience client, supply chain, omnicanal).</li><li>Déployer des solutions data-driven pour répondre aux besoins stratégiques.</li><li>Travailler étroitement avec les équipes IT, marketing, finance et opérationnelles.</li><li>Implémenter des technologies innovantes et veiller à leur alignement avec les objectifs stratégiques.</li></ul>VOTRE PROFIL<ul><li>Minimum 10 ans en stratégie data, dont 5 ans en management d'équipes pluridisciplinaires. Une expérience dans le retail ou un secteur similaire est essentielle.</li><li> Maîtrise des enjeux de gouvernance, qualité et cartographie des données. Capacité à piloter des projets complexes et à intégrer des solutions innovantes.</li><li>Talent pour recruter, fédérer et développer une équipe. Forte capacité à aligner la stratégie data avec les besoins business.</li><li>Bac+5 (Master, MBA ou équivalent) en data science, informatique, ou stratégie digitale.</li></ul>

Data Product Manager Up to £80,000 + bonuses and benefits Hybrid - London A great opportunity to join a leading telecoms business as a Data Product Manager THE COMPANYThe business are a leading telecoms business currently in a period of rapid growth and product tech transformation. As a result, they are seeking to expand their newly-formed Martech team. This team is responsible for improving and optimising the performance and effectiveness of paid media marketing activity, leveraging continuous experimentation and data insights for bidding and targeting.Joining the team as a Data Product Manager, you will be responsible driving the development and deployment of data products contributing to business outcomes. THE ROLE AND RESPONSIBILITIES<ul><li>Defining and executing a strategy for building Martech data foundations to support data driven marketing initiatives</li><li>Ensure Martech infrastructure aligns with internal data architecture and business goals</li><li>Oversee the integration of internal data platform</li><li>Ensure Martech solutions are aligned with business goals and data strategy</li><li>Manage lifecycle of data science, machine learning and analytical products from ideation to delivery</li><li>Ensuring data quality, compliance and governance in all data products</li></ul> YOUR SKILLS AND EXPERIENCE<ul><li>Proven track record in Product Management and Marketing Analytics</li><li>Strong analytical skills</li><li>Proven track record leading data products from ideation to delivery</li><li>Strong stakeholder management skills</li></ul> THE BENEFITS<ul><li>Up to £80,000 + bonuses + benefits</li><li>Hybrid (1 day a month)</li><li>London</li></ul> HOW TO APPLY If interested in the role please send your CV to Jordan Victor via the Apply Link below

Search Engine Marketing Analyst Media/Advertising$80,000 to $95,000 Remote ESTHarnham is partnered with a boutique media company looking to hire a search engine marketing analyst to join its ever-growing digital analytics function. If you thrive in a fast-paced environment, this could be the role for you!THE ROLE:As the search engine marketing analyst, you will be responsible for Helping lead internal and external projects with a primary focus on building out reports on a 0-1 capacity.Building a full funnel SEM strategies utilizing Google Ads, Bing Ads, Search Ads 360, and YouTube.Presenting insights derived from prior analytics work with a focus on digital media, SEM.Engaging in face-to-face capacity with clients to achieve SEM goals.SKILLS & EXPERIENCEBachelor's Degree required with a preference for computer science, business administration, or economics.Prior experience working with an agency in the media or advertising domain.Strong technical proficiency leveraging Google Ads, Bing Ads, Search Ads 360, and YouTubeStrong foundation in engaging and managing client accounts, with a primary focus on SEMProficient oral and communication abilities to present key findings through presentations to both internal and external stakeholders in a senior capacity.BENEFITS: Search Engine Marketing Analyst As a Search Engine Marketing Analyst you can expect to earn a salary of up to $95,000 with gold standard benefits.HOW TO APPLYPlease register your interest by sending your Resume to Sam Willman via the apply link on this page

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Harnham Interview Questions

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