Senior DevEx Engineer

500M+ downloads. 80M+ 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 7M 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 job The Velocity team exists to eliminate friction. We treat our internal developers as our customers. You will: • Abstract Complexity: Build intuitive tooling that enables self-service allowing devs to focus on product logic. • Standardize Excellence: Bake best-practices, security, observability, and scalability into the core stack so they aren't afterthoughts. What You Will Do • Developer Experience: Build self-service tools that give product teams autonomy without sacrificing system stability. • Platform Engineering: Architect and evolve our core stack (AWS, EKS, Terraform). • Systems Resilience: Lead reliability initiatives, including business continuity planning and a sustainable on-call rotation. • High-Scale Privacy: Support the infrastructure for industry-leading privacy features, such as our TIME-recognized "Anonymous Mode." • Observability: Implement best-in-class monitoring (metrics, logs, tracing) to ensure issues are identified and mitigated before they impact the user. What You Bring</stro