
Reddit · Remote - United States
Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the intern...
Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and
authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about.
With 100,000+ active communities and approximately 126 million daily active unique visitors, Reddit is one of the internet’s
largest sources of information. For more information, visit www.redditinc.com.
Reddit's Ads Data Science team is seeking a highly motivated Principal Data Scientist to drive the strategic application of
advanced quantitative methods across our advertising platform to advance the intelligence powering the advertiser experience on
Reddit.
In this pivotal leadership role, you will be responsible for defining and implementing the next generation of foundational data
science solutions, leveraging expertise in statistics, econometrics, machine learning and/or other quantitative methods to
optimize Reddit's Ads marketplace. You will partner closely with Analytics Engineering to ensure our underlying data systems are
continuously upleveled to support advanced analysis and modeling at scale. You will be a strategic partner, collaborating closely
with Product, Engineering, and Business leaders to establish the long-term vision for measurement, prediction, and optimization.
As a thought leader, you will champion scientific rigor, causal inference, and economic modeling, while providing deep mentorship
to the broader team. If you are passionate about applying foundational quantitative science to solve complex, high-impact business
problems, join us in shaping the future of Reddit ads.
infrastructure, building for the next several years of continued scale, revenue growth, and relevance.
platform, auction, targeting, and full-funnel relevance models). Lead the strategic design and scientific roadmap for new
solutions to significantly improve Advertiser ROI, User experience, and Reddit revenue.
lifetime value (LTV), and developing advanced predictive and causal frameworks that power Reddit’s strategic investments.
causal inference, offline model evaluation, and A/B experimentation to ensure scientific rigor and trust across the Ads data
science and engineering teams.
complex problems involving large-scale behavioral data, foundational models for strategic insights, and the economics of
marketplace dynamics.
measurement methodologies, and collaborate deeply with cross-org XFNs to align on strategic goals and translate insights into
tangible action.
and statistical direction across the entire product and engineering organization, and championing innovation in ad systems
through advanced quantitative techniques.
format evaluation, measurement & experimentation at scale
rigor, and machine learning best practice
This job posting may span more than one career level.
In addition to base salary, this job is eligible to receive equity in the form of restricted stock units, and depending on the
position offered, it may also be eligible to receive a commission. Additionally, Reddit offers a wide range of benefits to
U.S.-based employees, including medical, dental, and vision insurance, 401(k) program with employer match, generous time off for
vacation, and parental leave. To learn more, please visit https://www.redditinc.com/careers/.
To provide greater transparency to candidates, we share base salary ranges for all US-based job postings regardless of state. We
set standard base pay ranges for all roles based on function, level, and country location, benchmarked against similar stage
growth companies. Final offer amounts are determined by multiple factors including, skills, depth of work experience and relevant
licenses/credentials, and may vary from the amounts listed below.
In select roles and locations, the interviews will be recorded, transcribed and summarized by artificial intelligence (AI). You
will have the opportunity to opt out of recording, transcription and summarization prior to any scheduled interviews.
During the interview, we will collect the following categories of personal information: Identifiers, Professional and
Employment-Related Information, Sensory Information (audio/video recording), and any other categories of personal information you
choose to share with us. We will use this information to evaluate your application for employment or an independent contractor
role, as applicable. We will not sell your personal information or disclose it to any third party for their marketing purposes.
We will delete any recording of your interview promptly after making a hiring decision. For more information about how we will
handle your personal information, including our retention of it, please refer to our Candidate Privacy Policy for Potential
Employees and Contractors.
Reddit is proud to be an equal opportunity employer, and is committed to building a workforce representative of the diverse
communities we serve. Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and
disabled veterans in our job application procedures. If, due to a disability, you need an accommodation during the interview
process, please let your recruiter know.
Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 126 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com. Reddit’s Ads Data Science team is looking for a Senior Staff Data Scientist to lead the scientific strategy behind Reddit’s ads measurement and signal systems. This role sits at the center of how Reddit proves advertiser value, improves signal quality, builds privacy-aware measurement systems, and connects ads exposure to real advertiser outcomes. As a Senior Staff Data Scientist for Ads Measurement, you will be the principal architect of our technical vision and the driving force behind the next generation of our measurement ecosystem. In a landscape rapidly shifting due to privacy regulations, browser changes, and evolving platform dynamics, you will spearhead innovation across experimental design (incrementality/lift), identity, signals, and privacy-safe 1P/3P measurement. This is a high-visibility, high-impact role requiring a rare blend of deep experimentation & causal inference expertise, strategic foresight, and the ability to influence cross-functional executives and industry standards. You will not just adapt to the changing ad-tech environment, you will redefine how we measure value. RESPONSIBILITIES * Technical Vision & Strategy: Define the long-term data science vision & strategy across ads measurement, signal quality, identity, attribution, and privacy. Establish how Reddit should evaluate advertiser value, measurement quality, and signal utility across first-party and third-party products. * Set the Cross-Pillar Measurement Science Strategy: Define the long-term data science strategy across ads measurement, signal quality, identity, attribution, and privacy. Establish how Reddit should evaluate advertiser value, measurement quality, and signal utility across first-party and third-party products. * Build Trusted Measurement and Evaluation Frameworks: Create rigorous frameworks for validating lift, attribution, identity quality, modeled conversions, signal loss recovery, and privacy-aware measurement. Define ground truth, objective functions, quality metrics, guardrails, and decision frameworks that guide product and engineering investments. * Advance Experimentation and Causal Inference at Scale: Lead the evolution of Reddit’s experimentation and lift methodologies across Brand Lift, Conversion Lift, Split Testing, and emerging measurement products. Improve study quality, reduce bias and contamination, and develop scalable diagnostics for experiment health, feasibility, and interpretability. Partner with Ads Engineering to operationalize complex causal models, ensuring that scientific methodologies are not only accurate but also performant, scalable, and resilient in high-throughput production environments. * Connect Signals, Identity, and Ranking Outcomes: Quantify how signal quality, match rates, identity resolution, modeled conversions, and privacy changes affect bidding efficiency, CPA, ROAS, and advertiser outcomes. Partner with modeling and ranking teams to translate measurement improvements into performance gains. * Guide Privacy-Aware Ads Measurement: Lead a privacy-first measurement paradigm, positioning Reddit as a market leader in trusted advertising by recovering signal utility through compliant modeling. * Create Durable Data Science Infrastructure and Standards: Lead cross-org efforts to define reusable methodologies, dashboards, scorecards, quality metrics, and best practices. Build repeatable systems that improve how Ads DS evaluates launches, monitors regressions, sizes opportunities, and communicates impact. * Influence Senior Cross-Functional Strategy: Partner with senior leaders across Product, Engineering, Sales, Marketing Science, Legal/Privacy, and Ads leadership to shape roadmap decisions. Translate complex scientific tradeoffs into clear business and product recommendations. * Uplevel the Data Science Organization: Mentor Staff and Senior data scientists, sponsor high-impact technical work, and raise the bar for causal inference, measurement science, identity evaluation, data quality, and cross-functional decision-making across Ads DS. QUALIFICATIONS REQUIRED * Advanced degree in Statistics, Economics, Mathematics, Computer Science, Operations Research, Physics, or a related quantitative field, or equivalent industry experience. * 10+ years of industry experience in data science, applied science, economics, statistics, or a related quantitative role. * Deep expertise in ads measurement, experimentation, causal inference, attribution, marketplace measurement, or ads optimization. * Proven track record leading ambiguous, cross-functional, multi-pillar problem spaces with measurable business impact. * Strong command of statistical modeling, experimental design, causal inference, and measurement methodology. * Experience defining metrics, evaluation frameworks, quality guardrails, and decision systems for complex products. * Demonstrated ability to balance long-term strategic vision with hands-on execution of complex technical ideas. * Advanced proficiency in SQL and Python or R. * Ability to influence senior product, engineering, and business leaders through clear technical judgment and communication. * Demonstrated ability to mentor senior ICs and improve technical standards across a data science organization. * Demonstrated agility in adopting AI tools to amplify your personal output, turning complex methodologies into working prototypes with modern speed and efficiency. PREFERRED * Experience with ads identity, conversion modeling, signal loss, modeled conversions, match-rate optimization, or identity graph evaluation. * Experience with lift measurement, brand lift, conversion lift, incrementality testing, MMM, MTA, or third-party measurement partnerships. * Experience working on privacy-constrained measurement, clean rooms, aggregation, consent-aware systems, or privacy-preserving modeling. * Experience partnering with ranking, bidding, or machine learning teams to connect measurement quality to optimization outcomes. * Familiarity with two-sided marketplaces, auction systems, performance advertising, or advertiser-facing measurement products. * Experience building durable internal frameworks, training programs, scorecards, or methodology standards adopted across an organization. Benefits: * Comprehensive Healthcare Benefits and Income Replacement Programs * 401k with Employer Match * Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support * Family Planning Support * Gender-Affirming Care * Mental Health & Coaching Benefits * Flexible Vacation & Paid Volunteer Time Off * Generous Paid Parental Leave #LI-Remote Pay Transparency: This job posting may span more than one career level. In addition to base salary, this job is eligible to receive equity in the form of restricted stock units, and depending on the position offered, it may also be eligible to receive a commission. Additionally, Reddit offers a wide range of benefits to U.S.-based employees, including medical, dental, and vision insurance, 401(k) program with employer match, generous time off for vacation, and parental leave. To learn more, please visit https://www.redditinc.com/careers/. To provide greater transparency to candidates, we share base salary ranges for all US-based job postings regardless of state. We set standard base pay ranges for all roles based on function, level, and country location, benchmarked against similar stage growth companies. Final offer amounts are determined by multiple factors including, skills, depth of work experience and relevant licenses/credentials, and may vary from the amounts listed below. The base salary range for this position is: $232,500—$325,500 USD In select roles and locations, the interviews will be recorded, transcribed and summarized by artificial intelligence (AI). You will have the opportunity to opt out of recording, transcription and summarization prior to any scheduled interviews. During the interview, we will collect the following categories of personal information: Identifiers, Professional and Employment-Related Information, Sensory Information (audio/video recording), and any other categories of personal information you choose to share with us. We will use this information to evaluate your application for employment or an independent contractor role, as applicable. We will not sell your personal information or disclose it to any third party for their marketing purposes. We will delete any recording of your interview promptly after making a hiring decision. For more information about how we will handle your personal information, including our retention of it, please refer to our Candidate Privacy Policy for Potential Employees and Contractors. Reddit is proud to be an equal opportunity employer, and is committed to building a workforce representative of the diverse communities we serve. Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If, due to a disability, you need an accommodation during the interview process, please let your recruiter know.
QUI SOMMES-NOUS? Artefact est une nouvelle génération de société spécialisée dans le conseil en data et en marketing digital data-driven, dont les 2500 employés répartis sur 27 pays ont pour mission de transformer tous types de data chez nos clients en impact business. Nous offrons une large gamme de solutions data-driven, que nous customisons selon les besoins spécifiques de nos clients, que ce soit des projets IA pour l'automatisation des process internes à chaque étape de leur value chain, la création d'expériences consommateurs innovantes et personnalisées, le conseil en stratégie data et marketing digital jusqu'à la gestion du mix-média et plus encore ! La performance de nos services data repose sur une réelle expertise technologique en Intelligence Artificielle et des compétences métiers acquises auprès de nos 1000+ clients dans le monde, tels que Ubisoft, Sisley, OVH, Thales, Edenred, GRDF, Europcar… La force d'Artefact repose sur un mix unique d'atouts: des technologies data de pointe, des méthodes agiles permettant de délivrer très rapidement les projets et des équipes composées des meilleurs experts dans leurs domaines (business consultants, data analysts, data scientists, ingénieurs data et des pros du digital marketing). Le département Digital Marketing d’Artefact : Au sein des bureaux parisiens, l’équipe Digital Marketing d’Artefact France est composée de 70 experts du marketing digital couvrant l’ensemble des canaux marketing. Notre rôle est de construire les stratégies digitales les plus adaptées aux enjeux de nos clients, de les déployer, d’en assurer et d’en mesurer la performance. En collaboration avec les équipes Data marketing, nous accompagnons également des marques dans leur montée en maturité sur des sujets marketing variés : stratégie digitale, d’audience, de mesure, implémentation d’outils digitaux, formation d’équipes, etc. Dans ce contexte, nous recherchons pour accompagner notre croissance un(e) Média Consultant(e) Senior. RESPONSABILITÉS PRINCIPALES Définition de stratégie de Marketing digital Accompagner la transformation digitale de nos clientsFaire preuve d’agilité intellectuelle et de rigueur pour piloter des projets à haute valeur stratégique pour nos clients en vous appuyant sur l'expertise et les offres d'Artefact : Stratégie d’activation : mesure, audience, orchestration médiaCadrage et déploiement de cas d’usage digitauxCulture, gestion du changement & adoption autour de la data marketing et l’IA MISSIONS : Le/La Senior Digital Consultant(e) pilote, avec une large autonomie, des projets complets de bout en bout. Localisé dans des équipes chez le client ou dans nos bureaux parisiens, il/elle sera supervisé/e par un n+1 (manager, directeur, partner) et il/elle sera amené(e) à possiblement encadrer les consultants juniors. Pilotage d’un ou plusieurs streams * Garantir le delivery d’une mission * Identifier les points de blocage et proposer des solutions * Assurer la gestion de projet (Prise de note, compte-rendu, documentation, planning…) * Fournir des feedbacks constructifs aux membres plus juniors de l'équipe Production des livrables de mission * Produire de manière autonome des présentations (benchmarks, études de cas/marché, workshops decks, sections steerco) * Rédiger des storylines (messages clés, contenu, stratégie média / d’activation / marketing...) * Concevoir et livrer des slides percutantes * Animer les interviews et workshops. Conduite de la relation client * Construire une relation de confiance avec les clients de mission et les clients fil-rouge digital marketing * Démontrer de l'assurance dans les situations de networking * Identifier de potentielles opportunités business Contribution active au développement d’Artefact * Développer une offre, une Industrie, un chapter ou un partenariat avec votre école * Participer au processus de recrutement par le biais d'entretiens avec les candidats * Animation de différents trainings pour former les nouveaux arrivants. Impact Interne * Assurer la diffusion des connaissances du département Conseil Digital marketing au sein de l'entreprise * Participer à des événements externes et créer du contenu Artefact * Devenir une partie intégrante du processus de recrutement, nous aider à recruter les prochains talents, et ensuite coacher et développer les compétences des consultants juniors. PROFIL : * Vous avez 2 à 3 ans d'expérience professionnelle dans un cabinet de conseil, * Vous avez un profil avec une culture ‘business’ x ‘data’ x ‘marketing’ * Vous êtes curieux(se) et passionné(e) par les sujets liés à la data, au marketing, et à l’évolution technologique. * Vous avez un état d'esprit analytique et aimez la résolution de problèmes. * Vous avez de l'expérience dans la gestion des clients, vous savez comment identifier les opportunités commerciales et vous aimez les interactions. * Vous faites preuve de rigueur et proactivité * Vous maîtrisez : Suite Google/Pack Office, outils de workshop. * Une expérience avec les outils digitaux sera appréciée : Google Analytics, Google Ads, Meta Business Manager, TikTok Ads, etc * Une excellente communication (écrite / orale) en Français et en Anglais est obligatoire. Pourquoi nous rejoindre : * Une localisation idéale: nous somme basé en plein cœur de Paris dans le 9ème arrondissement. * Un mélange unique de talents (Data consultants, Data Analyst, Data scientist, software engineer, Experts digitaux, Créatifs), et une hyper croissance continue offrant de nombreuses opportunités de carrières rapides. * Un endroit idéal pour apprendre : Vous maîtriserez les compétences clés du monde de l'entreprise de demain, vous recevrez des formations régulières, vous travaillerez en équipes hybrides. A la fin de votre expérience Artefact, vous êtes un leader marketing & technologique expérimenté. * La culture : Innovation, Collaboration et Action sont nos valeurs, pour faire simple, nous sommes des faiseurs qui travaillent ensemble afin de créer des solutions innovantes. Esprit d'entreprise : vous rejoindrez une équipe d'entrepreneurs motivés. Nous n'abandonnerons pas tant que nous n'aurons pas fait un grand pas dans ce secteur ! Package de rémunération : 45K fixe à 50K fixe (selon profil) + 4K de variable Process de recrutement : 1. HR 2. Entretien fit, Manager Conseil 3. Entretien avec étude de cas en direct avec un Directeur de clientèle ou un Directeur Conseil Média 4. Entretien final, Partner Come join us ! Chez Artefact, la diversité et l’inclusion sont au cœur de notre culture. Nous encourageons chacun et chacune à évoluer pleinement, grâce à des initiatives internes comme Women@Artefact, PrideFact ou Disability@Artefact. Nous proposons également des dispositifs concrets pour accompagner tous nos collaborateurs : flexibilité du temps de travail et télétravail, allongement du congé maternité, et adaptation des conditions et postes de travail selon les besoins individuels. Notre objectif : permettre à chacun de concilier ambitions professionnelles et équilibre personnel, et de se projeter durablement chez Artefact. Nous recrutons nos collaborateurs uniquement en fonction de nos besoins et des qualités propres de chaque candidat. Nous assurons le développement de leurs compétences professionnelles et de leurs responsabilités sans discrimination d’aucune sorte, notamment de croyances, de genre, d’âge, de situation d'handicap, d’origine ethnique, d’orientation sexuelle, d’appartenance à une organisation politique, religieuse, syndicale ou à une minorité.
At CoMind, we are developing a non-invasive neuromonitoring technology that will result in a new era of clinical brain monitoring. In joining us, you will be helping to create cutting-edge technologies that will improve how we diagnose and treat brain disorders, ultimately improving and saving the lives of patients across the world. THE ROLE: The Data Science team at CoMind develops the algorithms and machine learning systems that transform raw optical interference signals from CoMind One into continuous, clinically meaningful measurements of cerebral blood flow, intracranial pressure, and autoregulation. Working at the frontier of photonics, physiology, and applied ML, the team's work directly determines what CoMind One can measure, how accurately, and under what clinical conditions. As Principal Data Scientist, you will be the technical authority for CoMind's data science function, setting methodological direction for signal extraction and ML modelling, personally driving the most complex and highest-impact problems, and providing expert guidance across the team. This is a senior individual contributor role: you will not manage people directly, but your technical leadership will shape how the entire team approaches its most challenging problems. You will work closely with R&D, Clinical, and Software Engineering. At CoMind, all team members work at least 4 days per week from our new Kings Cross offices, plus a flexible work-from-home day. RESPONSIBILITIES: * Own the technical direction for signal processing and ML model development on CoMind One, defining approaches, architectures, and evaluation frameworks that set the standard for the team * Lead the development and validation of the most complex data science components, from novel algorithm design through to evidence generation for regulatory submissions * Act as the primary technical reviewer and expert resource across the data science team, setting the bar for methodological rigour, reproducibility, and scientific integrity * Drive the design and execution of data collection and labelling strategies with Clinical teams, including ground truth definition, dataset governance, and performance benchmarking * Contribute to CoMind's IP and publication strategy, authoring and reviewing technical papers, patent applications, and regulatory documents * Represent the data science function in cross-functional technical forums, architecture reviews, and external scientific and clinical engagements * Identify and introduce new methods, tools, and approaches that advance CoMind's signal extraction and ML capabilities * AI is fundamental to our culture. It's not just a tool, but a core part of how we work, collaborate, and innovate. We expect all team members to embrace AI in their daily work and continuously find new ways to use it effectively. SKILLS & EXPERIENCE: * 15+ years of experience in data science, ML, or applied research, with a strong track record of independent technical leadership on complex, ambiguous problems * Deep expertise in time-series signal processing and physiological or biomedical ML, including hands-on experience developing and validating models on noisy, real-world physiological data * Demonstrated ability to take algorithmic work from research through to production-quality, validated implementation * Experience in a regulated industry (medical devices, diagnostics, pharma, or similar), with familiarity with algorithm validation and documentation requirements for software as a medical device * Strong record of scientific output: publications, patents, or equivalent evidence of original technical contribution and domain authority Nice to Have * Background in neuroscience, neuromonitoring, neurophotonics, and/or cerebrovascular physiology * Experience with optical signal processing - e.g. LiDAR, pulse oximetry, NIRS, laser doppler flowmetry, or related technologies * Familiarity with FDA regulatory pathways for AI/ML-based medical devices BENEFITS: * Company equity plan so all employees share in the success of the company * Salary-sacrifice pension scheme * Private medical, dental and vision insurance (medical history disregarded) * Group life assurance at 4x annual income * Comprehensive mental health support, including unlimited access to 1:1 sessions with trained professionals * Unlimited holiday allowance (+ bank holidays) and one week of remote working per quarter * Lunch voucher (£10) every day for JustEat and free dinner on those days where you need to work later * Twice weekly deliveries of fresh fruit and an extensive selection of snacks and drinks * YuLife subscription, allowing you to turn your daily steps and meditation into discounts at a range of stores * Access to Udemy for upskilling and professional development.