Senior DevOps Engineer - Linux Infrastructure… at 1GLOBAL · Lisbon

About Us

1GLOBAL is a technology-driven global mobile communications provider, delivering global connectivity solutions to enterprises and consumers. Powered by a best-in-class telecom platform – including its own owned and operated global mobile core network, fully fledged in-house developed eSIM technology, and an extensive portfolio of telecom licenses – 1GLOBAL operates as a fully regulated telecommunications provider across 40 countries worldwide.

We serve many of the world’s leading banks, enterprises, and digital-first businesses, including neo-banks, global fast moving consumer goods companies, travel leaders, and payment service providers. Today, 1GLOBAL connects more than 70 million people and devices globally, enabling our customers to launch, scale, and innovate with confidence in the mobile ecosystem.

1GLOBAL is a profitable, fast-growing business. With full-year revenues in 2025 exceeding US$200 million and profits of over US$25 million, we generate strong cash flows to fund our growth allowing us to continuously invest in infrastructure, platform innovation, and global expansion. Recent years have marked a defining phase in our journey, with major enterprise and mass-consumer client wins accelerating our evolution into a global mobile connectivity powerhouse, purpose-built to enable consumer brands to enter and succeed with their own aspirations to offer telecommunications services to their clients.

Founded in 2022 by experienced technology entrepreneurs, Hakan Koç and Pyrros Koussios, 1GLOBAL has rapidly emerged as a European technology leader shaping the future of global telecommunications. We operate as a fully regulated Mobile Virtual Network Operator (MVNO) in 12 countries and as a regulated telecom operator in an additional 28 markets. Headquartered in the Netherlands, with world-class R&D hubs in Lisbon, Berlin, and São Paulo, our team of close to 500 experts across 15 countries is united by a single ambition: to redefine global mobile connectivity through technology, scale, and execution excellence.

About the Team

We are looking for a talented DevOps Engineer with a focus on Cloud and On-prem infrastructure to join our Technology Department in Lisbon.

As a DevOps Engineer, you will design, deploy, and manage our runtime infrastructure, ensuring it is secure, scalable, and cost-efficient. You will plan and implement our container orchestration and service mesh architecture, maintain multi-account AWS Organisation setups, and automate tasks to eliminate human intervention in repetitive processes. Your role includes regular system monitoring, performing maintenance, managing software patches and upgrades, and ensuring optimal observability and performance of systems and applications. You will also investigate and resolve infrastructure issues and create comprehensive documentation for peers and users.

Fluency in English is essential for this role. Please ensure your CV is submitted in English as part of your application.

About the Role

• Own the Core OS: Design, harden, and lifecycle-manage our Linux distributions across both VMs and cloud environments.
• Bridge the Stack: Architect and maintain the integration between traditional on-premises hardware (compute, storage, networking) and our AWS multi-account footprint.
• Low-Level Optimization: Think about scale and reliability at the system level, focusing on kernel tuning, I/O performance, and resource isolation.
• Infrastructure Evolution: Plan the migration or hybrid-connectivity path between traditional VM-based workloads and container orchestration (K8s/Service Mesh).
• Hybrid Observability: Maintain unified visibility across physical hardware health and high-level application metrics (logs, Prometheus metrics, and traces).
• Eliminate Toil: Automate routine systems administration (patching, provisioning, backups) to ensure a "hands-off" datacenter experience.
• Disaster Recovery: Manage high-availability and DR strategies, including off-site backups, hardware redundancy, and stateful data integrity.

About You

• Linux Mastery: 5+ years of deep Linux systems engineering (RHEL/CentOS, Debian/Ubuntu). You should be comfortable with the CLI, boot process, LVM, and systemd.
• Network & Storage Savvy: Solid understanding of TCP/IP networking, VLANs, load balancing (HAProxy), and storage protocols (NFS, iSCSI, SAN).
• Virtualization Expert: Heavy experience with virtualized environments, including resource allocation and performance troubleshooting.
• Modern Orchestration: Proficient in Docker and Kubernetes (EKS), with the ability to explain how containers interact with the underlying Linux kernel (cgroups/namespaces).
• Automation Architect: Expertise in Ansible for configuration management and Terraform for managing both cloud resources and on-prem providers.
• Scripting: Advanced proficiency in Bash and Python for automating system tasks and data processing.
• Security Mindset: Knowledge of OS hardening (SELinux/AppArmor), SSH key management, and internal compliance auditing.

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.