Overview
1GLOBAL is a technology-driven global mobile communications provider, delivering global connectivity solutions to enterprises and consumers. The company operates a fully regulated telecommunications platform across 40 countries worldwide, including its own global mobile core network, in-house eSIM technology, and a broad portfolio of telecom licenses.
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 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 growth and continue investing in infrastructure, platform innovation, and global expansion.
Founded in 2022 by 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 28 additional markets. Headquartered in the Netherlands, with 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 a Network Engineering member, in the Signalling functional area, you will be responsible for proposing, analyzing and defining the requirements for new and existing services and systems related to the signalling routing area and subscriber data management systems under the responsibility of the functional area. Prepare, design, test and provide new solutions or product changes for the existing portfolio. Define and support the technology evolution roadmap for the systems under the functional area. Participate and support other functional areas in cross-functional projects.
About the Role
* Collaboration with other Networks teams in defining and managing projects for delivery of new solutions
* Project delivery. Network design. Integration and migration strategy definition. Collaboration with other relevant departments. Responsible for end-to-end delivery
* Design of new consumer and corporate telecom solutions
* Creation of technical documentation (HLDs, LLDs, WOs, etc.) and maintaining it over the lifecycle of the solutions
* Perform implementations in live environments. Understanding of end-to-end system testing requirements
* Follow-up and define Quality and Performance indicators
* Capacity and Performance Analysis, Reporting and Improvement Solution Definition
* Service & Resource configuration definition and implementation on requested systems
* Work on complex solutions that influence the design of current products and address design issues for future products or technologies
* Close relationship with external partners like carriers and service providers
* Elaborate and manage the process for change requests to current partners to meet network needs
* Control the network elements roadmap, responsible for necessary software/hardware upgrades during the components lifecycle
* Generate and implement process improvements, including cross-team processes
* Document the existing technology portfolio and propose recommendations for improvements and/or alternatives
Requirements
Must-haves
* Proven experience in implementing live mobile telecom solutions (GSM, UMTS, LTE, IMS), network design, capacity management, engineering and architecture
* Knowledge of 3GPP, GSMA, ITU standards and specifications
* Experience in the design, test and operation of signalling network functions, including STPs, DEA/DRAs and HLR/HSS
* Experience in defining, establishing and maintaining signalling interconnects (SIGTRAN and DIAMETER) using SCTP multi-homing
* Experience with HLR/HSS, subscriber profiles, subscriber repositories and reference interfaces
* Knowledge of IMS Architecture with understanding of IMS nodes, including Application Servers and its interaction with profile repositories
* Experience in mobile services charging (online). Knowledge and experience with Ro, Gy, Gx interfaces
* Knowledge and experience with signalling protocols and routing including M3UA, M2PA, DIAMETER, as well as upper layer protocols such as MAP, CAMEL, Sh, Cx
* Knowledge of 5G SA networks from a signalling (SCP and SEPP) and AUSF/UDM/UDR perspective
* Experience with protocol analyser tools like Wireshark, Astelia, and ability to use them to troubleshoot network errors/problems for the mentioned protocols
* Experience with ETSI NFV architecture and solutions
* Familiar with MVNO/MVNE/MVNA architectures and landscape
* English proficiency mandatory; other languages are a plus
* Degree in Telecom Engineering or Computer Science or equivalent experience
Nice-to-haves
* +3 years working in telecoms, designing and implementing mobile core networks
* Previous experience with Nokia, Oracle, HPE products
Benefits
What We Offer?
* CLT contract — job stability and reliable benefits
* Quarterly performance bonuses to reward hard work and achievements
* Meal allowance paid into Caju card — R$100 per working day
* Health insurance with SulAmérica — 50% covered by the company
* Extended parental leave - 180 days of maternity leave and 20 days of paternity leave
* Daycare allowance provided to mothers with children under 3 years old — R$500 per month per child
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: Collaborate daily with management and external advisors, exposed to talented and driven individuals
* Dynamic Work Environment: Thrive in a collaborative, fast-paced workplace where innovation is encouraged
* Professional Development: Work alongside industry experts to enhance your skills in a cutting-edge field
* International Experience: Gain opportunities to work in different 1GLOBAL offices around the world
* Open Communication Culture: Join a team where ideas are heard and open dialogue is encouraged
* Get Things Done Attitude: Be part of a results-driven team that values efficiency and impact
1GLOBAL is an equal opportunity employer and 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.
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