Job Description

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

As 1GLOBAL continues to expand its global customer base and service portfolio, ensuring the performance, reliability, and scalability of our mobile network becomes increasingly critical. The Head of Network Optimization will establish and lead a new function within the Network organization, reporting directly to the CTO Networks, with responsibility for driving operational excellence, service assurance, and continuous improvement across our network and services.

A primary focus of this role is the proactive detection, investigation, and resolution of network and service issues before they impact customers. The Head of Network Optimization will define and implement the monitoring strategy, performance frameworks, and operational processes required to identify service degradation, performance bottlenecks, and emerging risks at the earliest possible stage. By leveraging network data, KPIs, and operational insights, the team will drive rapid incident response, effective root cause analysis, and long-term corrective actions to continuously improve service reliability and customer experience.

The role will establish and lead a dedicated Network Optimization team responsible for overseeing network changes, defining service and network KPIs, developing recovery and resilience mechanisms, and ensuring operational readiness across all network domains. Beyond issue resolution, the function will use operational learnings to identify structural improvements in network architecture, platform design, and service flows, reducing operational risk and strengthening network performance at scale.

Working closely with Network Engineering, Operations, Product, Software Engineering, Legal & Regulatory, and commercial teams, the Head of Network Optimization will serve as the focal point for service performance and reliability, ensuring that operational excellence, rapid problem resolution, and continuous optimization remain central to 1GLOBAL's growth strategy.

About the Role

• Monitor, analyze, and report on network performance metrics, KPIs, and trends to identify bottlenecks, proactively address issues, and continuously improve service quality and customer experience.
• Lead the resolution of complex network incidents and major service outages across multiple core network domains, ensuring timely restoration and minimal customer impact.
• Contribute to solution architecture and design from an operational perspective, ensuring reliability, resilience, maintainability, and service quality are embedded from the outset.
• Manage, coach, and develop the Network Optimization team, fostering a culture of continuous improvement in issue detection, troubleshooting, mitigation, and resolution.
• Own and govern the Root Cause Analysis (RCA) process, ensuring corrective and preventive actions are assigned, tracked, and completed to improve network and service reliability.
• Define, implement, and continuously improve processes related to vendor management, service management, and operational governance.
• Develop and maintain a comprehensive library of operational procedures, recovery plans, and best practices to support efficient network and service restoration.
• Oversee the deployment, integration, and operational acceptance of new core network elements, features, and software upgrades.
• Execute traffic management and network optimization activities to protect service performance, network stability, and customer experience during planned and unplanned events.
• Ensure all Network Optimization activities are delivered on time, within agreed quality standards, and in alignment with organizational objectives and operational priorities.
• Maintain an on-call 24/7 rota covering the network defined scope

Requirements

About You

Must-haves

• Strong understanding of mobile network architectures and technologies across 2G, 3G, 4G/LTE, and 5G domains.
• Proven experience with MVNO architectures and the broader MVNO ecosystem, including a solid understanding of roaming environments and their technical, commercial, and regulatory aspects.
• Strong knowledge of networking principles, protocols, and security concepts.
• Hands-on experience with transport and signaling protocols, including SIGTRAN, Diameter, SCTP, and GTP.
• Hands-on experience with telecom application protocols such as MAP, CAMEL, and SIP.
• Solid expertise in LTE, 5G, IMS, VoLTE, VoWiFi, and IP-based technologies and protocols.
• Experience with cloud-native solutions, virtualization technologies, and modern telecom infrastructure platforms.
• Strong analytical skills, with the ability to interpret network metrics and KPIs and correlate them to network and service performance across multiple domains.
• Proven experience in troubleshooting, root cause analysis, and resolution of complex issues in mobile network environments.
• Familiarity with network monitoring, observability, and performance management tools used in mobile networks.
• Experience with automation, scripting, and data-driven operational improvement initiatives.
• Proactive and results-driven mindset, with the ability to anticipate potential issues and implement preventive actions before customer impact occurs.
• Demonstrated ability to work effectively in complex, multicultural, and geographically distributed environments.
• Strong sense of ownership and attention to detail, ensuring tasks are completed thoroughly and to a high standard.
• Minimum of 8 years of experience in the telecommunications industry, with a focus on the design, implementation, optimization, or operation of mobile core network services.
• Bachelor's degree in Telecommunications Engineering, Computer Science, or a related field; equivalent practical experience will also be considered.
• Professional proficiency in English is required; additional languages are considered an advantage.

Nice-to-haves

• Strong business acumen, with the ability to engage effectively with non-technical stakeholders and translate business needs into technical requirements.
• Excellent communication, stakeholder management, and presentation skills, with the ability to convey complex technical concepts to diverse audiences.
• Experience working in cross-functional environments involving product, engineering, operations, and commercial teams.
• Knowledge of ITIL, service management, or operational excellence frameworks.

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.