Carrier Manager

1GLOBAL; Greater London; On-site; GBP 85,000 - 125,000; Full time

Job summary

1GLOBAL in London is seeking a Carrier Manager to lead commercial and operational relationships with mobile operators, aggregators, and numbering partners across Voice, SMS, and MNP. You will own cost control, routing optimization, and revenue growth while ensuring compliance and performance.

In a fast‑growing, international team, you will negotiate terms, SLAs, and porting arrangements, collaborate with product, legal, and network teams, and build durable partnerships across markets to maximise

Qualifications

• Experience in carrier relations / mobile wholesale (voice interconnect, SMS, or numbering/MNP).
• Understanding of the telecom carrier ecosystem including voice routing, SMS (P2P/A2P), and numbering/porting.
• Strong commercial sense with ability to analyse cost, margin and revenue.
• Excellent communicator, highly organized and able to work independently.

Responsibilities

• Manage outbound voice traffic costs and routing across carrier base for quality, coverage and margin.
• Own inbound voice revenue relationships with carrier partners to maximize termination revenue.
• Manage outbound and inbound SMS traffic (P2P/A2P) including cost, revenue, partner and aggregator management.
• Own relationships with numbering partners and MNP agreements implementation and ongoing management.
• Own MNP discipline across the business including regulatory compliance and porting performance.
• Negotiate all carrier, aggregator and numbering partner agreements/addendums including terms and SLAs.
• Own operational performance against contracts for voice, SMS and numbering partners with SLAs and change requests.

Skills

Carrier relations

Voice interconnect

SMS aggregation

Numbering/MNP

Telecom carrier ecosystem

Voice routing

SMS (P2P/A2P)

Cost optimization

Revenue optimization

Negotiation skills

Stakeholder management

Independent working

Strategic thinking

Job description

About Us

1GLOBAL is a technology-driven global mobile communications provider helping enterprises and consumer brands deliver seamless connectivity worldwide. Powered by a best-in-class telecom platform, proprietary eSIM technology, and its own mobile core network across 15 countries, 1GLOBAL operates as a fully regulated telecommunications provider in 43 countries.

Founded in 2022, 1GLOBAL has rapidly become one of Europe's fastest-growing telecom technology companies, connecting more than 80 million people and devices globally. Our customers include leading banks, multinational enterprises, global retailers, travel companies, payment service providers, and digital-first businesses.

Headquartered in the Netherlands, with R&D hubs in Lisbon, Berlin, and São Paulo, 1GLOBAL employs over 550 professionals across 16 countries. With annual revenues exceeding US$200 million and a strong track record of profitability, we continue to invest in innovation, infrastructure, and international expansion as we redefine the future of global mobile connectivity.

About the Team

1GLOBAL’s Wholesale team is a fundamental enabler for the 1GLOBAL business, and this is a critical, high-profile role at the heart of Wholesale’s carrier and interconnect activities. The Wholesale team is responsible for establishing and managing 1GLOBAL’s relationships with mobile operators, aggregators, and numbering partners that underpin our global voice and messaging traffic. The Carrier Manager will own the commercial and operational relationships across Voice, SMS, and Numbering/MNP, ensuring 1GLOBAL has the most effective and profitable carrier structure in place to meet the future requirements of the business.

We’re a global team and are open to hiring candidates based in London, Lisbon, Berlin, or Amsterdam.

About the Role

• Managing outbound voice traffic costs and routing across our carrier base, continuously optimizing for quality, coverage, and margin.
• Owning inbound voice revenue relationships with carrier partners to maximize termination revenue across all routes.
• Managing outbound and inbound SMS traffic across both P2P and A2P channels, including cost, revenue, partner, and aggregator management.
• Owning relationships with numbering partners, and the implementation and ongoing management of Mobile Number Portability (MNP) agreements.
• Owning MNP as a discipline across the business, including regulatory compliance, porting performance, and cross-functional coordination with product, legal, and network teams.
• Negotiating all carrier, aggregator, and numbering partner agreements/addendums, including commercial terms, SLAs, and technical requirements.
• Owning operational performance against contract across voice, SMS, and numbering partners, including service level measures, escalations, and change requests.

About You

Must Have

• Good experience in carrier relations / mobile wholesale (ideally voice interconnect, SMS aggregation, or numbering/MNP)
• Strong understanding of the telecom carrier ecosystem, including voice routing, SMS messaging (P2P/A2P), and numbering/porting processes
• Excellent commercial skills and a strong analytical ability, particularly around cost, margin, and revenue optimization
• Excellent communicator; highly organised; forthright; able to work independently with minimal supervision.
• Driven, energetic, and resilient, able to thrive under pressure in a fast-paced, high-growth environment
• Ability to think creatively and strategically and translate strategic thinking into solid deliverables and plans
• Able to form strong relationships both with carrier, aggregator, and numbering partners and internal stakeholders

Nice to Have

• A solid base of industry contacts across carriers, aggregators, and numbering partners
• Experience negotiating voice interconnect, SMS aggregation, or numbering agreements
• Knowledge of MNP regulatory frameworks and porting processes across relevant markets (Ofcom, FCC, national regulators)
• Familiarity with SMS firewall/filtering technology and A2P monetization models
• Experience with least-cost routing (LCR) platforms and traffic/cost management tools

Why 1GLOBAL?

• Growth Opportunities: Advance your career in one of the fastest growing telecommunications companies, expanding over 50% 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.