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Description

1GLOBAL is a technology-driven global mobile communications provider dedicated to empowering enterprises worldwide to unlock the full growth potential of mobile connectivity. With a best-in-class telecom technology platform, a comprehensive suite of globally viable regulatory licenses, and privileged access to the telecom wholesale market, 1GLOBAL is uniquely positioned to deliver seamless compliance and connectivity solutions. Serving the world’s leading banks, corporations, and digital-first businesses—including neo-banks, travel companies, and payment service providers—1GLOBAL connects over 43 million devices globally.

 
With 2024 full-year revenue exceeding US$100 million and in line to exceed US$200 million in FY25, 1GLOBAL is a profitable business generating significant cash flows to fund its ongoing investments in infrastructure, transformation, and growth. 2024 saw major client wins and marked 1GLOBAL’s evolution from a multi-market telecommunication provider to a global technology-driven mobile connectivity powerhouse.

 
Established in 2022 by experienced tech founders and entrepreneurs Hakan Koç and Pyrros Koussios, 1GLOBAL is a European technology leader driving digital transformation in the global telecommunications market. It operates as a fully regulated Mobile Virtual Network Operator (“MVNO”) in ten countries and as a regulated telecommunications operator in an additional 31 countries. Headquartered in the Netherlands, with world-class R&D hubs in Lisbon, Berlin, and São Paulo, 1GLOBAL employs over 450 experts across 15 countries.

Position Overview

We are looking for a talented Site Reliability Engineering (SRE) Team Lead to join our Technology Department.

We are open to hiring this role in Berlin, Germany.

As the SRE Team Lead, you will be responsible for ensuring the stability, scalability, and reliability of our global infrastructure and services across both cloud and on-prem environments.

You will lead a team of SREs focused on service availability, resilience, and operational excellence, driving 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 build tools and processes to 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.

Key Responsibilities

• Lead and mentor a team of Site Reliability Engineers, setting clear priorities, goals, and reliability metrics.
• 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.
• Collaborate 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.
• Establish on-call practices, improving alert quality, runbooks, escalation procedures and incident management processes.
• Conduct 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.
• Built and managed cloud cost-optimization frameworks, including reserved capacity planning, autoscaling design, storage tiering, workload right-sizing, and continuous anomaly detection.

Requirements

Must Have

• A minimum of 7 years of experience in Site Reliability, Systems, or Infrastructure Engineering (including 2+ years in a SRE role and 2+ years in a leadership role).
• Strong expertise in Linux systems engineering, distributed systems, and networking.
• Proven experience building and running high-availability, mission-critical production systems.
• Hands-on experience with redundancy and failover testing, disaster recovery, and high-availability architecture validation.
• Deep understanding of monitoring, observability, and incident management principles.
• Experience with Prometheus, Grafana, Loki, Thanos, and OpenTelemetry or similar tools.
• Proficiency in Python, Go, and Bash for automation and reliability tooling.
• Strong knowledge of Kubernetes, container orchestration, and service mesh architectures.
• Experience with AWS (EKS, EC2, VPC) and on-premises infrastructure integration.
• Proficiency in Infrastructure as Code tools such as Terraform.
• Understanding of networking fundamentals (routing, load balancing, BGP, DNS, VXLAN, etc.).
• Excellent analytical and problem-solving skills, capable of leading under pressure.
• Strong communication and collaboration skills across distributed and cross-functional teams.

Nice to Have

• Experience in telecom, carrier-grade, or large-scale distributed systems environments.
• Hands-on experience with chaos engineering and automated failure-scenario validation (e.g., simulating link or node failures).
• Strong understanding of high-availability networking concepts.
• Background in capacity planning, traffic engineering, and multi-region failover.
• Experience building reliability dashboards and integrating SRE metrics into business KPIs or compliance reports.
• Familiarity with security and resilience standards (ISO 27001, NIST SP 800-53).

Benefits

Why 1GLOBAL?

• Growth Opportunities: Advance your career in one of the fastest growing telecommunications companies, expanding over 100% year-on-year under the leadership of successful tech entrepreneurs.
• Major Transaction Exposure: Be in the driver’s seat for transactions that will have an impact on the future telco industry.
• Work with a Talented Team: From the Board and the Founders to the Senior Management Team, you will collaborate daily with the most capable and renowned external advisors, and constantly being exposed to talented and driven individuals.
• Dynamic Work Environment: Thrive in a collaborative, fast-paced workplace where innovation is encouraged, and every contribution counts.
• Professional Development: Work alongside industry experts to enhance your skills and knowledge in a cutting-edge field.
• International Experience: Gain opportunities to work in different 1GLOBAL offices around the world as you grow within the company.
• Open Communication Culture: Join a team where your ideas are heard, and open dialogue is encouraged, fostering a supportive and transparent work environment.
• Get Things Done Attitude: Be part of a results-driven team that values efficiency, creativity, and the drive to make a tangible impact in the industry.

1GLOBAL is an equal opportunity employer, we value your character as much as your talent. Diversity drives our innovation, and we offer a collaborative, dynamic, and international work environment. We are excited for you to join our mission to revolutionise connectivity globally.