Senior Site Reliability Engineer (AWS)

TL;DR

Senior Site Reliability Engineer (AWS): Designing and scaling fault-tolerant, self-healing systems for a global eSIM platform with an accent on observability, automation, and multi-region AWS infrastructure. Focus on eliminating manual toil, optimizing system reliability through chaos engineering, and refining the on-call experience.

Location: Fully remote, but must be based in Spain

Company

hirify.global is a global eSIM platform that enables millions of travellers to connect instantly across the globe through high-scale systems and carrier integrations.

What you will do

• Lead the design of scalable, fault-tolerant, and self-healing systems within a multi-region AWS environment.
• Define and track SLOs and SLIs to guide architectural decisions and manage error budget policies.
• Develop internal tools and automation to permanently eliminate manual operational tasks.
• Implement deep observability using Prometheus, Datadog, and OpenTelemetry to generate proactive insights.
• Identify and mitigate operational risks through chaos engineering and rigorous architecture reviews.
• Collaborate with software engineers to ensure reliability, scalability, and maintainability from the early stages of the SDLC.

Requirements

• Bachelor’s degree in Computer Engineering or a similar discipline.
• 5+ years of experience as a Site Reliability Engineer or in a similar role.
• 3+ years of experience with AWS services and 2+ years of experience with Kubernetes.
• Proficiency in at least one programming language such as Python, Go, or Java for automation.
• Experience with Terraform (IaC), GitHub Actions (CI/CD), and event-driven architectures (SNS, SQS).
• Fluency in English is required.
• Must be based in Spain.

Nice to have

• Prior experience with Telco Core Networks (5G/LTE, IMS, Signaling) and eSIM/GSMA technologies.
• Relevant certifications such as AWS Certified DevOps Engineer or CKA.
• Experience with AI-driven SRE tools for anomaly detection.
• Contributions to open-source SRE projects or communities.
• Experience with Scrum and other agile methods.

Culture & Benefits

• Environment emphasizing real ownership, autonomy, and a direct link between shipping and business outcomes.
• Blameless culture focused on learning from mistakes and knowledge sharing.
• Fully remote work arrangement within the Spanish team.
• Collaborative atmosphere working with smart, motivated engineers at global scale.