Principal Data Platform Engineer

500M+ downloads. 77M+ monthly users. A decade of building – and we’re still accelerating.Flo is the world’s #1 health & fitness app worldwide on a mission to build a better future for female health. Backed by a $200M investment led by General Atlantic, we became the first product of our kind to reach a $1B valuation in 2024 – and we’re not slowing down.With 6M paid subscribers and the highest-rated experience in the App Store’s health category, we’ve spent 10 years earning trust at scale. Now, we’re building the next generation of digital health – AI-powered, privacy-first, clinically backed – to help our users know their body better.The jobWe're a world-class team of product builders, engineers, data scientists, growth hackers, user researchers, designers, and medical experts — all building an app that generates long-term value for our millions of users worldwide. Our engineers aren’t just building a better product; they’re making the world a better place by improving access to important health information. We leverage machine learning and AI to provide accurate cycle predictions and relevant, personalized, and medically credible health tips.Join our Data Platform team as a technical leader and architect shaping the future of data infrastructure for 400M+ users globally. You'll drive cross-team technical strategy, mentor senior engineers, and set the standard for engineering excellence across our data platform.We're not a service team; we're the architects of a product suite dedicated to empowering every corner of our organization with actionable insights. Our expertise in Data Engineering and Data Quality isn't just a badge of honor; it's the cornerstone upon which our company's analytics and data pipelines stand tall.As a Principal Data Platform Engineer, you'll take ownership of critical data infrastructure components, mentor engineers, and drive projects that directly impact product decisions affecting women's health worldwide.What You'll AccomplishTechnical Leadership & Strategy: Define and drive multi-quarter technical roadmap for data platform evolution aligned with company objectivesMake high-stakes architectural decisions balancing performance, cost, scalability, and maintainability for petabyte-scale systemsLead evaluation and adoption of new platform technologiesEstablish engineering standards and best practices adopted across Data Platform and adjacent teamsDrive platform cost optimization initiatives saving significant infrastructure spend while improving performanceCross-Functional Influence:Partner with engineering leadership, product teams, and analytics leadership on strategic data initiativesLead technical design reviews for major initiatives across Data Platform and related teamsRepresent Data Platform in organization-wide technical forums and decision-makingEngineering ExcellenceDesign and implement foundational platform capabilitiesSolve the most complex technical problems others escalate, setting examples for problem-solving approachesOptimize platform reliability, achieving >99.9% uptime for critical data pipelines and servicesRequiredWhat We're Looking For10+ years of software/data engineering experience with deep expertise in distributed systems and data platforms Proven technical leadership with track record of driving organization-level technical strategy and architectureExpert-level mastery of data engineering technologies (Spark, Databricks, cloud platforms, orchestration, streaming, governance, etc.)Deep production experience building and scaling Data Lakehouse platforms (Databricks Unity Catalog strongly preferred)Strong architectural skills designing systems for scalability, reliability, and performance at petabyte scaleAdvanced understanding of data governance, security, and compliance in regulated environmentsExperience mentoring senior engineers and influencing engineering practices across teamsExceptional communication skills - ability to influence technical and non-technical stakeholders at all levelsTrack record of making sound technical decisions with organization-wide impactExperience managing platform costs and optimizing infrastructure spendStrongly PreferredDeep Databricks expertise including Unity Catalog architecture and Delta Lake internalsBuilt real-time data platforms at scaleExperience with semantic layer implementations and BI modernizationInfrastructure-as-Code mastery (Terraform) managing complex cloud environmentsLed data platform migrations or major architectural transformationsHealthcare, fintech, or regulated industry experience handling sensitive dataNice to have:Experience building AI/ML infrastructure and LLM pipelinesExperience with data mesh or data fabric architecturesContributions to Databricks community or ecosystem toolsBackground in distributed systems research or advanced CS topicsWhy This Role is UniqueTechnical influence: Shape data strategy for a company impacting hundreds of millions of usersMission-driven impact: Your work directly supports women's health globally, powering insights that help millions make informed decisionsComplex problem space: Solve unique challenges at the intersection of healthcare data, privacy, ML, and scaleArchitecture ownership: Drive decisions on platform direction with significant autonomyInnovation leadership: Introduce cutting-edge data technologies in production at scaleTeam & CultureYou'll join a 6+ person Data Platform team reporting to the Data Platform Engineering Manager. We work closely with:Analytics teams supporting product and business decisionsBackend engineers integrating data pipelines with production systemsML Engineering team building predictive health modelsAnalytics Engineering, team defining data modeling and BI architectureData Scientists developing new features and experimentsEngineering Leadership - contributing to organization-wide technical strategyWe value:Engineering excellence: High code quality, thorough testing, thoughtful architectureStrategic thinking: Balancing immediate needs with long-term platform visionCollaborative leadership: Influencing through expertise, not authorityOwnership: Taking responsibility for outcomes, not just outputsPragmatism: Making smart tradeoffs between perfect and practicalWork-life balance: Sustainable pace with flexible working arrangementsSalary Range - gross per month (ranges may vary based on skills and experience)€10.000 - €11.500 EURHow We WorkWe’re a mission-led, product-driven team. We move fast, stay focused and take ownership – from brief to build to impact. Debate is encouraged. Decisions are shared. We care about craft, ship with purpose, and always raise the bar.You’ll be working with people who take their work seriously, not themselves. It takes commitment, resilience, and the drive to keep going when things get tough. Because better health outcomes are worth it.What You'll GetWe support impact with meaningful reward. Here’s what that looks like:Competitive salary and annual reviewsOpportunity to participate in Flo’s performance incentive schemePaid holiday, sick leave, and female health leaveEnhanced parental leave and pay for maternity, paternity, same-sex and adoptive parentsAccelerated professional growth through world-changing work and learning supportFlexible office + home working, up to 2 months a year working abroad5-week fully paid sabbatical at 5-year FloversaryFlo Premium for friends & family, plus more health, pension and wellbeing perksDiversity, equity and inclusionOur strength is in our differences. At Flo, hiring is based on merit, skill and what you bring to the role – nothing else. We’re proud to be an equal opportunity employer, and we welcome applicants from all backgrounds, communities and identities. Read our privacy notice for job applicants.