Senior Frontend Software Engineer - React & Next.JS

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 and in line to exceed US$200 million in FY25, 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 ten 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 15 countries.

The Role

You will be part of an international team, driving the development of 1GLOBAL\'s eSIM platform, including our consumer and IoT solutions. We are looking for a talented frontend developer and team player, with experience in React and Next.js to join our team. As a Frontend Software Engineer, you will be responsible for developing and maintaining our web applications, ensuring an excellent user experience and high performance. You will work closely with the design and backend teams to implement features and optimize applications for maximum speed and scalability.

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

• Develop features for users using React and Next.js
• Collaborate with the design team to create intuitive and responsive web interfaces
• Optimize applications for performance and scalability
• Work closely with the backend team to integrate RESTful APIs
• Write efficient, clean and reusable code
• Participate in code reviews to maintain quality and ensure best practices
• Keep up to date with industry trends and technologies
• Solid experience in frontend development with React and Next.js
• Proficiency in HTML, CSS, JavaScript and TypeScript
• Experience with CSS frameworks such as Tailwind
• Knowledge of testing frameworks such as Jest or React Testing Library
• Experience with responsive design
• Familiarity with RESTful APIs, both in use and in construction
• Knowledge of modern frontend build tools and workflows
• Ability to effectively troubleshoot and resolve bugs
• Ability to work independently and as part of a team
• Experience with CI / CD pipelines will be considered a plus
• Excellent communication skills (fluent in English, both written and spoken), with a self-motivated and autonomous mindset

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.

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