Principal Infrastructure Engineer

The role

You will design and run Kubernetes and data infrastructure for 80 million monthly active users. You will build self-service tooling and Terraform modules to provide autonomy to product teams.

What you will do

• Architect and evolve the EKS estate including cluster lifecycle, networking, autoscaling, workload isolation, Helm and Terraform
• Shape how services use PostgreSQL, DynamoDB and Kafka by setting patterns for provisioning, access, backup, failover and capacity
• Build self-service tooling and Terraform modules for product teams
• Lead resilience work including business continuity planning and disaster recovery testing
• Maintain a sustainable on-call rotation
• Support infrastructure for privacy features and maintain SOC2, ISO 27001 and ISO 27701 certifications
• Manage observability through metrics, logs and traces

Required qualifications

• Many years in infrastructure, platform, SRE or DevOps roles running high-traffic, distributed systems in production
• Operated at Principal or Staff scope, setting direction across teams and delivering
• Run Kubernetes in production for real workloads
• Understand how PostgreSQL, DynamoDB and Kafka behave under load and when they fail
• Strong AWS knowledge
• Fluent Terraform
• Doc-first habit
• Ability to bring distributed product teams with you

Nice to have

• Coding experience in Go or Python
• Hardening infrastructure for high-compliance or security-sensitive environments (HIPAA, SOC 2, PCI)
• Running managed data services in AWS (RDS, Aurora, MSK, DynamoDB) at scale, including migrations and major version upgrades
• Scaling consumer platforms with millions of concurrent users
• AWS Certified Solutions Architect Professional, CKA or CKS

Benefits

• Competitive salary and annual reviews
• Opportunity to participate in Flo’s performance incentive scheme
• Paid holiday, sick leave, and female health leave
• Enhanced parental leave and pay for maternity, paternity, same-sex and adoptive parents
• Accelerated professional growth through world-changing work and learning support
• 5-week fully paid sabbatical at 5-year Floversary
• Flo Premium for friends & family
• Health, pension and wellbeing perks

About the company

Flo is the world’s #1 health & fitness app with 500M+ downloads and 80M+ monthly users. It is a mission-led company building AI-powered, privacy-first digital health tools.