Java Team Lead

1GLOBAL is a technology-driven global mobile communications provider dedicated to empowering enterprises worldwide to unlock the full growth potential of mobile connectivity. With a best-in-class telecom technology platform, a comprehensive suite of globally viable regulatory licenses, and privileged access to the telecom wholesale market, 1GLOBAL is uniquely positioned to deliver seamless compliance and connectivity solutions. Serving the world’s leading banks, corporations, and digital-first businesses—including neo-banks, travel companies, and payment service providers—1GLOBAL connects over 43 million devices globally.

With 2024 full-year revenue exceeding US$100 million, 1GLOBAL is a profitable business generating significant cash flows to fund its ongoing investments in infrastructure, transformation, and growth. 2024 saw major client wins and marked 1GLOBAL’s evolution from a multi-market telecommunication provider to a global technology-driven mobile connectivity powerhouse.

Established in 2022 by experienced tech founders and entrepreneurs Hakan Koç and Pyrros Koussios, 1GLOBAL is a European technology leader driving digital transformation in the global telecommunications market. It operates as a fully regulated Mobile Virtual Network Operator (“MVNO”) in nine countries and as a regulated telecommunications operator in an additional 31 countries. Headquartered in the Netherlands, with world-class R&D hubs in Lisbon, Berlin, and São Paulo, 1GLOBAL employs over 450 experts across 13 countries.

Position Overview

We are looking for a talented and experienced engineering leader to join our RSP team. You will be part of an international team, driving the development of 1GLOBAL's eSIM platform, including our consumer and IoT solutions.. We value teamwork and embrace a culture of fully owning our deliverables, meaning we are both autonomous and accountable for them. Highly focused on our customers and determined to build and deliver a valuable proposition.

Fluency in English is essential for this role, please ensure your CV is submitted in English as part of your application.

We are open to considering candidates for this role in Lisbon, Portugal, and Warsaw, Poland.

Key Responsibilities

• Design and implement efficient and maintainable solutions, ensuring the best practices in software development.
• Lead the development of robust, scalable, and high-performance micro-services architecture.
• Collaborate with cross-functional teams, including frontend developers, product managers, and designers, to translate business requirements into scalable and efficient backend solutions.
• Drive architectural decisions and contribute to the overall system design.
• Develop and maintain RESTful APIs to facilitate seamless communication between different components of our platform while ensuring API security, performance, and reliability.
• Design and optimize database schemes and work closely with the database administrators to ensure efficient data storage and retrieval.
• Identify and address performance bottlenecks in the backend systems and continuously optimize and improve the efficiency of existing code and systems.
• Mentor team members when needed and contribute with meaningful reviews.

Requirements

Benefits

Why 1GLOBAL?

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.