Telecom Billing Software Engineer

Telecom Billing Software Engineer - Lisbon Based

1GLOBAL · Lisbon, Portugal (Hybrid) · Full-time · Posted 2026-08-14

Workplace: hybrid

Department: Technology

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

You will be part of an international team, driving the development of 1GLOBAL's billing system. We are looking for a talented developer and team player, capable of designing and implementing new services, maintaining existing components, and testing our applications.

We are looking for someone with a strong track record in a role between product and technology teams at product-led growth companies. You will be part of a dynamic team driving the Mediation and Billing solution delivery and the full life-cycle of our product lines. 

The team is located in Lisbon.

About the Role

• Build high-impact features and contribute to the architecture design; aim towards resiliency, scalability, security and fault tolerance;
• Advocate for high quality, readability and high tests coverage;
• Work with an Agile methodology;
• Identify areas of improvement and promote them through seamless integrations, documenting solutions and new flows;
• Mentor junior members when needed and contribute with meaningful reviews.

Requirements

About You

• Good understanding of billing in the telecom/utilities industries.

• Proven experience with billing systems (e.g., Amdocs, CSG, Oracle BRM, ...). Experience with Oracle BRM is a plus.

• Experience with mediation systems is a plus (e.g., DigitalRoute MediationZone).
• Proficiency with consuming REST APIs. Basic software development skills is a plus.
• Familiarity with relational databases, GIT and CI/CD flows.
• Basic understanding of cloud services and scalable infrastructure.
• Excellent communication skills (fluent in English, both written and spoken), with a self-motivated and autonomous mindset.

Benefits

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.

Legal Notice

This job advert and its content are the property of 1GLOBAL and are protected by copyright and other intellectual property rights. Copying, reproducing, republishing or distributing this advert, in whole or in part, without 1GLOBAL’s prior written consent is prohibited. 1GLOBAL reserves all rights and may take appropriate action against any unauthorised use.

Legitimate 1GLOBAL vacancies only redirect candidates to its official application channels, including LinkedIn and Workable, and 1GLOBAL never charges fees or request payments as part of our recruitment process. If you are unsure whether a vacancy is genuine, please refer to 1GLOBAL careers page at ​https://www.1global.com/vacancies‌ or contact [email protected].

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