Lead Site Reliability Engineer (AWS)

TL;DR

Lead Site Reliability Engineer (AWS): Architecting and improving cloud-native systems for a health and wellness platform with an accent on reliability, performance at scale, and automation. Focus on shaping SLIs/SLOs, leading high-severity incident response, and evolving the resilience of distributed AWS environments.

Location: London, UK

Company

hirify.global is a health and wellness retailer transforming into a product- and platform-led technology organization.

What you will do

• Architect cloud-native systems focusing on reliability, SLIs/SLOs, and capacity planning.
• Lead high-severity incident response and conduct post-incident reviews to drive measurable improvements.
• Mentor SREs and platform engineers while championing DevSecOps and observability practices.
• Develop CI/CD pipelines and Infrastructure-as-Code environments to remove toil and accelerate teams.
• Collaborate with Security and Platform teams to align reliability with overall resilience goals.
• Implement resilience validation via load testing, stress testing, and chaos engineering.

Requirements

• 5–8+ years of experience in SRE, Platform, or Cloud Infrastructure roles.
• Deep expertise in AWS (EC2, EKS, Lambda, VPC, DynamoDB, S3, CloudFront, RDS, IAM, KMS).
• Strong coding proficiency in Python, Go, or Bash for automation.
• Expertise with observability stacks including Datadog, Prometheus, Grafana, and OpenTelemetry.
• Proficiency with Terraform, CloudFormation, or AWS CDK.
• Proven experience in incident response leadership and root-cause analysis.

Nice to have

• Experience mentoring or leading engineers within SRE or platform teams.
• Hands-on experience with load testing, stress testing, and chaos engineering.
• Passion for uplifting engineering culture through tooling and reliability-first thinking.

Culture & Benefits

• Wellbeing benefits: Health Cash Plan, Life Assurance, Virtual GP, and Private Medical care.
• Financial perks: Bonus scheme based on company and personal performance and Pension Contribution scheme.
• Discounts: 25% colleague discount and annual product allowance.
• Learning & Development: Access to Level 2-5 Apprenticeships, workshops, and a Digital Learning Library.
• Lifestyle: Access to 'Wellhub' with gyms, studios, and wellbeing apps.