VP of Security & Infrastructure
Flo Health9 hours ago
London, United KingdomStaff+
Responsibilities
- Build and ship LLM-powered product features such as AI-generated mobile push notifications, personalized content recommendations, custom user journeys, and conversational insights.
- Improve AI response latency and user experience through streaming, pregeneration, and inference-time tradeoffs.
- Iterate on prompts, model behavior, calibration, structured outputs, and fine-tuned health-domain models.
- Enable A/B testing, evaluation gates, synthetic Q&A generation, golden test sets, and evaluation dataset design.
- Contribute to Databricks, AWS, Terraform, and CI/CD initiatives as needed.
- Collaborate with Product, Design, Security, Analytics, Medical teams, and technology partners.
Requirements
- 7+ years of software engineering experience with recent hands-on experience building product features backed by LLMs.
- Experience with at least one of prompt engineering, LLM evaluation, fine-tuning, or model serving.
- Strong Python skills and comfort with APIs/SDKs that wrap LLM calls, prompt templates, and structured outputs.
- A track record of shipping user-facing features with attention to latency, tone, and AI output quality.
- Willingness to learn infrastructure tools including Databricks, AWS, Terraform, and GitHub Actions.
- Preferred qualifications include experience with LLM evaluation frameworks, judges, graders, calibration, LoRA, RLHF/DPO, model distillation, DSPy, feature stores, personalization or ranking, healthcare or regulated AI, Spark, Delta tables, and Parquet.
Benefits
- Competitive salary with annual reviews and participation opportunity in Flo’s performance incentive scheme.
- Paid holiday, sick leave, female health leave, and enhanced parental leave and pay.
- Accelerated professional growth through mission-driven work and learning support.
- Hybrid work model with three days per week in the office.
- Five-week fully paid sabbatical at the five-year Floversary.
- Flo Premium for friends and family, plus health, pension, and wellbeing perks.
Tech Stack
Categories
About Flo Health
Flo Health builds a mobile app for menstrual cycle, ovulation, fertility, and pregnancy tracking, offering AI-powered insights and a private community on iOS and Android. The company operates a freemium model with optional premium subscriptions and health content. Founded in 2015 and headquartered in London, this privately held firm reports tens of millions of monthly active users, and its privacy-focused Anonymous Mode was named one of Time’s Best Inventions of 2023.