Senior Site Reliability Engineer

At Airalo, we're making it easier for people to stay connected wherever they travel. As the world's first eSIM store, we help millions of travelers access affordable mobile data in 200+ countries and regions around the world.

Today, we're a team of 400+ people across 60+ countries, building a product used by travelers every day. We've grown quickly, but we've worked hard to keep what matters: trust, ownership, and the freedom for people to do great work without unnecessary layers or bureaucracy.

We're fully remote by design, genuinely global, and united by a shared mission to make travel simpler for everyone.

• Location: Remote, anywhere in Spain or the UK.
• Contract:
  • Spain: Full-time, permanent contrato indefinido via Deel (our employer of record in Spain)
  • UK: Full-time, permanent
• Benefits: Learn more about our benefits here in this link - https://airalo-public.notion.site/Benefits-25396a97ffca81fb9bc1f0be479f1be3?pvs=74 
• Languages: English is our main working language day to day, so you'll need to be comfortable communicating in it both in meetings and async.

What you’ll do:

Lead the design of scalable, fault-tolerant and self-healing systems in a multi-region AWS environment.
Define and track Service Level Objectives (SLOs) and Service Level Indicators (SLIs) to drive architectural decisions and error budget policies.
Conduct blameless post-incident reviews to uncover systemic root causes and implement long-term preventive measures.
Identify patterns of manual work and lead the development of internal tools/automation to permanently eliminate them.
Develop and maintain automated runbooks and playbooks for common operational tasks and complex incident response.
Shift from simple monitoring to deep observability, ensuring high cardinality data leads to proactive actionable insights.
Proactively identify and mitigate operational risks through chaos engineering and architecture reviews.
Work with software engineers to design systems for reliability, scalability, and maintainability from the early stages of the SDLC.
Continuously evaluate and optimize system performance, capacity, and cost efficiency.
Beyond just participating, you will refine the on-call experience to reduce alert fatigue, improve MTTR, and ensure sustainable rotation health.

Must-haves:

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 including strong knowledge of container orchestration.
2+ years of Kubernetes experience
Deep understanding of observability principles and tools such as: Prometheus, Datadog, OpenTelemetry and similar.
Experience with leading incident management and complex postmortem analysis.
Experience and interest in managing infrastructure as code (Terraform).
Experience with chaos engineering and other techniques for testing system resilience.
Experience with CI/CD tools such as GitHub Actions for automated delivery.
Proficiency in at least one programming language (Python, Go, Java, etc.) for building automation and internal tooling.
Event-driven architecture experience (SNS, SQS etc)
Ability to work independently and collaboratively in a fast-paced environment.
Team player and open to new ideas.
Good communication skills and fluency in English.

Good to have:

Prior experience with Scrum and other agile methods.
Certification in relevant areas such as AWS Certified DevOps Engineer, Certified Kubernetes Administrator (CKA), or similar.
Prior experience with Telco Core Networks (e.g., 5G/LTE Packet Core, IMS, Signaling) and low-latency networking.
Experience with AI-driven SRE tools for anomaly detection and improvements
Contributions to open-source SRE projects or communities.
Prior work experience in telecommunications.
Deep understanding of eSIM and GSMA related technologies and services.
If you are interested in this position, please apply via the link.

Why People Join Us🇪🇸 Why people join us in Spain

We started Airalo to make staying connected effortless, wherever you are in the world. Today, millions of travelers rely on our eSIMs, and many of the people building the product were customers first.

Our team is united by a shared belief that great work happens when people are trusted to own what they do. As Airalo continues to grow, so do the opportunities to learn, take on new challenges, and make a real impact.

For many of our teammates in Spain, it's the combination of stability, flexibility, and genuine work-life balance that makes Airalo feel like home.

We started Airalo to make staying connected effortless, wherever you are in the world. Today, millions of travelers rely on our eSIMs, and many of the people building the product first discovered us as customers.

Our team spans 60+ countries, but what people often notice quickly is how work actually feels here. There's trust to own what you do, space to focus without constant layers of process, and a clear sense of what you're responsible for from day one.

As Airalo continues to grow, people tend to stay for a mix of things: the chance to work on a product used globally, the autonomy to shape how they work, and the opportunity to keep taking on new challenges without getting stuck in one lane.

Participating in our on-call rotation is a core expectation of this role. It's essential for maintaining 24/7 service reliability across our global operations, ensuring our systems remain resilient and our customers experience uninterrupted service, regardless of time zone or geography.

• Paid Rotation: We offer standby fees + overtime pay.
• Delayed Start: No on-call duties for your first 6 months.
• Rest & Recovery: Guaranteed rest periods and flexible hours following night incidents.
• Shared Load: Rotations are split (Weekdays vs. Weekends) to minimize fatigue.

Please refer to the On-Call Policy in the Airalo Handbook for full details: https://airalo-public.notion.site/our-approach-to-engineering-on-call-policy