Senior Java Software Engineer

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 We are looking for a talented engineer to join our Consumer Group. You will join a development team responsible for the product delivery and in-life management of our B2C (betterroaming) and B2B2C (API powering Revolut, nordVPN, etc.) products. The talented team is eager to learn and experiment with new technologies. We value teamwork and embrace a culture of fully owning our deliverables, meaning we are both autonomous and accountable for them. About the Role Build high-impact features and contribute to the architecture design; aim towards resiliency, scalability, security and fault tolerance; Advocate for high code quality, readability and high tests coverage; Promote best practices for a high-scale web (or mobile) environment; Work with an Agile methodology; Identify areas of improvement in the codebase and promote them through seamless integrations, documenting solutions and new flows; Mentor junior members when needed and contribute with meaningful reviews. Requirements About You 5+ years of experience in Java software development; Experience with unit/integration/e2e testing (test-driven development is a plus); Proficiency with REST APIs, both in implementing and consuming the interfaces; Experience with development tools and processes (Git-flow, peer reviewing); Familiarity with relational databases, CI/CD flows, Git, Docker, and Kubernetes; Good 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…