Principal Software Engineer

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.

Position Overview

We are seeking a Principal Software Engineer to join our high-performing engineering team. In this senior technical leadership role, you will be responsible for driving the architecture, design, and development of scalable, high-impact software solutions. You will collaborate closely with cross-functional teams — including product management, design, and infrastructure — to define the technical vision and guide the execution of complex engineering initiatives that shape our platform's future.

Key Responsibilities

• Lead the end-to-end design, development, and delivery of complex software systems and platform components.
• Define and evolve the technical architecture to ensure scalability, reliability, performance, and security.
• Partner with product and engineering leadership to align technical strategies with business goals.
• Mentor and coach engineers across multiple teams, fostering a culture of technical excellence and innovation.
• Conduct technical reviews, code audits, and architectural assessments to maintain high engineering standards.
• Drive adoption of best practices in software engineering, DevOps, and continuous integration/deployment.
• Collaborate cross-functionally to solve challenging technical problems and remove delivery bottlenecks.
• Evaluate emerging technologies and tools to improve productivity and product quality.

Requirements

• 10+ years of professional software engineering experience, with at least 3+ years in a technical leadership or principal role.
• Deep expertise in designing and building large-scale distributed systems or cloud-native applications.
• Strong proficiency in [primary tech stack, e.g., Java, Python, Go, C#, ], and familiarity with modern frameworks and tools.
• Proven experience with cloud platforms (AWS, Azure, or GCP), microservices, and API design.
• Excellent understanding of system design, data structures, algorithms, and performance optimisation.
• Demonstrated ability to influence and align stakeholders through strong communication and technical leadership.
• Passion for mentoring and developing engineering talent within an agile, collaborative environment.
• A track record of delivering high-quality, impactful products that meet business and user needs.

Benefits

Why 1GLOBAL?

• Growth Opportunities: Advance your career in one of the fastest growing telecommunications companies, expanding over 100% 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.