1GLOBAL is a technology-driven global mobile communications provider helping enterprises and consumer brands deliver seamless connectivity worldwide. Powered by a best-in-class telecom platform, proprietary eSIM technology, and its own mobile core network across 15 countries, 1GLOBAL operates as a fully regulated telecommunications provider in 43 countries.
Founded in 2022, 1GLOBAL has rapidly become one of Europe's fastest-growing telecom technology companies, connecting more than 80 million people and devices globally. Our customers include leading banks, multinational enterprises, global retailers, travel companies, payment service providers, and digital-first businesses.
Headquartered in the Netherlands, with R&D hubs in Lisbon, Berlin, and São Paulo, 1GLOBAL employs over 550 professionals across 16 countries. With annual revenues exceeding US$200 million and a strong track record of profitability, we continue to invest in innovation, infrastructure, and international expansion as we redefine the future of global mobile connectivity.
We are looking for a talented Senior Site Reliability Engineer (SRE) to join our Technology Department. We are open to hiring this role in Berlin, Germany.
As a Senior SRE, you will be a senior individual contributor responsible for strengthening the stability, scalability, and reliability of our global infrastructure and services across both cloud and on-prem environments. You will work alongside SREs under the guidance of the SRE Team Lead, taking ownership of critical reliability domains and helping drive a data-driven reliability culture based on SLIs, SLOs, and error budgets.
Your mission will be to proactively identify weaknesses across systems and improve reliability through redundancy testing, automation, and observability. You will design, build, and operate the tools and processes that automatically detect, prevent, and recover from incidents, ensuring our services remain reliable and performant for customers around the world.
This role collaborates closely with DevOps, Infrastructure, IP Network, and Security teams to maintain carrier-grade reliability standards across all layers of our platform.
- Act as a senior technical contributor within the SRE team, mentoring peers and setting the technical bar for reliability engineering.
- Define, measure, and maintain SLIs and SLOs for core infrastructure and customer-facing services.
- Plan and execute redundancy and resilience testing across service, infrastructure, and networking layers — validating failover, HA configurations, and disaster recovery readiness.
- Design and implement automated recovery mechanisms, self-healing workflows, and intelligent alerting systems.
- Drive incident response, root-cause analysis, and blameless post-mortems, and ensure implementation and tracking of corrective and preventive actions derived from them to achieve continuous improvement.
- Develop and enhance observability (metrics, logs, traces) using Prometheus, Grafana, Loki, and OpenTelemetry.
- Partner with Infrastructure and DevOps teams to ensure deployment safety, rollback policies, and configuration consistency.
- Proactively identify weaknesses through fault-injection, load, and chaos testing.
- Continuously reduce operational toil through automation and reliability tooling.
- Contribute to on-call practices, improving alert quality, runbooks, escalation procedures, and incident management processes.
- Perform capacity planning, performance benchmarking, and resilience audits across systems.
- Ensure compliance with security, reliability, and availability standards.
- Create and maintain internal documentation, playbooks, and operational guidelines for peers and users.
- Contribute to cloud cost-optimization initiatives, including reserved capacity planning, autoscaling design, storage tiering, workload right-sizing, and continuous anomaly detection.
