Sr. Data Scientist

Hims And Hers · London, Englandsenior

In short

▸Científico de datos sénior que construye modelos de machine learning desde cero hasta producción.
▸Gestiona todo el ciclo de vida del modelo, trabajando con producto, ingeniería y finanzas para mejorar experiencias y operaciones.
▸Destacado: Se valora fuertemente la experiencia en entornos 0 a 1, lanzando modelos de ML desde cero en producción.

Experiencia previa trabajando con equipo internacional o en entornos de trabajo en inglés

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What they ask for

✓5+ años de experiencia aplicada en ciencia de datos o ingeniería de ML
✓Experto en Python y SQL
✓Experiencia comprobada en entornos cloud (AWS o GCP)
✓Habilidad para construir soluciones en producción con CI/CD y Git
✓Capacidad para comunicar hallazgos técnicos a stakeholder no técnicos
✓Formación en un campo cuantitativo (ciencias de datos, estadística, matemáticas, etc.)

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PythonSQLpandasNumPyscikit-learnPyTorchXGBoostLightGBMAWSGCP

Who should you write to at Hims And Hers?

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Hims & Hers is the leading health and wellness platform, on a mission to help the world feel great through the power of better health. We are redefining healthcare by putting the customer first and delivering access to care that is affordable, accessible, and personal, from diagnosis to treatment to delivery. No two people are the same, so we provide access to personalized care designed for results. By normalizing health & wellness challenges and innovating on their solutions, we’re making better health outcomes easier to achieve. com/how-it-works . com/careers-professionals . About the Role: As a Senior Data Scientist at Hims & Hers, you are a core driver of technical execution and innovation within our data organization. You take complex business challenges and translate them into robust, scalable data products and machine learning models. You will be trusted to operate with high autonomy, owning your projects from the initial exploratory analysis through to production deployment. In this role, you will work closely with Product, Engineering, and Business stakeholders to deliver solutions that optimize our operations, refine our marketing efforts, and enhance the customer experience. You will not only build powerful models but also help uphold the engineering rigor and standards of our data team. You Will: Build from Scratch: Thrive in a 0-to-1 environment. You are comfortable rolling up your sleeves to write complex SQL, engineer your own features, and deploy baseline models (heuristics or simple ML) quickly to prove value before iterating toward complex solutions. End-to-End Execution: Own the complete model lifecycle, from data extraction and feature engineering to deployment, A/B testing, and ongoing performance monitoring. Cross-Functional Collaboration: Partner closely with Engineering, Product, and Finance teams to define technical requirements and translate model outputs into clear, actionable business insights. Uphold Technical Standards: Write clean, modular, and production-ready code. Actively participate in peer code reviews and contribute to the team’s technical best practices. Drive Project Delivery: Navigate technical ambiguity within your domain, breaking down complex project requirements into manageable, executable milestones. Team Mentorship: Provide technical guidance and support to junior data scientists and analysts, helping them troubleshoot roadblocks and adopt best practices. Experience & Skills: 5+ years of applied experience in Data Science or ML Engineering, with a track record of delivering production-ready models that drive measurable business value. Technical Proficiency: Strong expertise in Python and SQL. Deep familiarity with the Python data stack (pandas, NumPy, scikit-learn) and standard ML frameworks (such as PyTorch, XGBoost, or LightGBM). Engineering Rigor: Proven ability to build for production. Experience working in cloud-based environments (AWS or GCP) and familiarity with CI/CD workflows, version control (Git), and ML Ops principles. Analytical Problem Solving: Strong ability to connect technical metrics to business outcomes. You know how to choose the right algorithm for the right problem rather than just the most complex one. Communication: Excellent ability to explain technical concepts, model limitations, and analytical findings to non-technical stakeholders. ). Qualifications: 0-to-1 Execution: Experience taking the very first machine learning models in an organization from exploratory notebooks to reliable, automated production pipeline

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