HSS and Signalling Engineer - Lisbon Based

1global; Lisboa; Híbrido; EUR 70 000 - 100 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Growth opportunities

International exposure

Open communication culture

Resumo da oferta

1GLOBAL is seeking an HSS and Signalling Engineer based in Lisbon. You will define requirements for signalling routing, subscriber data management, and evolve the technology roadmap within a regulated MVNO/MVNA environment. You will collaborate across networks teams on project delivery and technical documentation.

The role emphasizes live implementations, end-to-end testing, and cross-functional collaboration with carriers and service providers to meet network needs.

Qualificações

• Proven experience in live mobile telecom solutions (GSM, UMTS, LTE, IMS) and network design.
• Knowledge of 3GPP, GSMA, ITU standards and specifications.
• Experience in designing, testing and operating signalling network functions (HLR/HSS).
• Experience with signalling interconnects (SIGTRAN, DIAMETER) using SCTP.
• Experience with HLR/HSS, subscriber profiles and interfaces.
• Knowledge of IMS Architecture and roaming interfaces.
• Experience in mobile services charging (online) and Ro, Gy, Gx.
• Knowledge of protocol suites including M3UA, M2PA, DIAMETER, MAP, CAMEL, Sh, Cx.
• Knowledge of 5G SA signalling (SCP/SEPP) and AUSF/UDM/UDR.
• Experience with protocol analyzers like Wireshark and Astelia.
• Familiar with ETSI NFV architecture and MVNO/MVNE/MVNA.
• English proficiency mandatory.
• Degree in Telecom Engineering or CS or equivalent.

Responsabilidades

• Collaborate with Networks teams to deliver new solutions.
• Design, implement and migrate network projects end-to-end.
• Create technical documentation (HLD/LLD/WO) and maintain lifecycle.
• Perform live environment implementations and end-to-end testing.
• Define QoS, performance indicators and capacity plans.
• Coordinate with carriers and partners for interconnects and changes.

Conhecimentos

Signalling networks design

GSM/UMTS/LTE/IMS

DIAMETER/SIGTRAN

HLR/HSS knowledge

5G SA signalling

English proficiency

Formação académica

Degree in Telecom Engineering or Computer Science

Ferramentas

Wireshark

Astelia

Descrição da oferta de emprego

HSS and Signalling Engineer - Lisbon Based

Lisbon, Portugal

Porto, Portugal

Full-time

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 KoçandPyrros 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 more than 500 experts across 16 countries is united by a single ambition: to redefine global mobile connectivity through technology, scale, and execution excellence.

About the Ideal Candidate

As a Network Engineering member, in the Signalling functional area, you will be responsible for proposing, analyse and define the requirements for new and existing services and systems, related with 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 of the already existing portfolio. Define and support the technology evolution roadmap for the systems under the functional area. Participate and support the other functional areas in cross functional projects.

About the Role

• Collaboration with other Networks teams in defining and managing the 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 (HLD's, LLD's, WO's, etc.) and maintain it over the lifecycle of the solutions
• Perform implementations in live environment. 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 addresses design issues for future products or technologies
• Close relationship with external partners like carriers, service providers
• Elaborate, and manage the process, for change requests to current partners in order to meet the network necessities
• Control the network elements roadmap, being responsible for the necessary software/hardware upgrade during the components lifecycle
• Generate and implement process improvements, including and especially cross-team processes
• Documents the existing technology portfolio and proposes recommendations for improvements and/or alternatives

Requirements

About You

Must Have

• Proven experience on implementation of live solutions on mobile telecom (GSM, UMTS, LTE, IMS), networks 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 based, using SCTP multi-homing
• Experience with HLR/HSS, subscriber profiles, subscriber repositories and respective 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 Ro, Gy, Gx interfaces
• Knowledge and experience with signalling protocols and routing including M3UA, M2PA, DIAMETER, as we 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 networks errors/problems for the mentioned protocols
• Experience with ETSI NFV architecture and solutions
• Familiar with MVNO/MVNE/MVNA architecture(s) and landscape
• English proficiency mandatory, other languages are a plus
• Degree in Telecom Engineering or Computer Science or equivalent experience

Nice to Have

• +3 years working on telecoms, designing and implementing mobile core networks
• Previous experience with Nokia, Oracle, HPE products

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.

1GLOBAL is a trading name of 1GLOBAL Holdings B.V.